dofigen_lib/

deserialize.rs

use crate::{Error, dofigen_struct::*};
#[cfg(feature = "json_schema")]
use schemars::JsonSchema;
use serde::{Deserialize, Deserializer, de};
use std::{
    cmp::Ordering,
    collections::{BTreeMap, HashMap},
    fmt,
    hash::Hash,
    marker::PhantomData,
    usize,
};
#[cfg(feature = "permissive")]
use std::{ops::Deref, str::FromStr};
use struct_patch::{Merge, Patch};

/// Implements the From trait for a struct from a patch
macro_rules! impl_from_patch_and_add {
    ($struct:ty, $patch:ty) => {
        impl From<$patch> for $struct {
            fn from(value: $patch) -> Self {
                let mut s = Self::default();
                s.apply(value);
                s
            }
        }
    };
}

impl_from_patch_and_add!(Dofigen, DofigenPatch);
impl_from_patch_and_add!(Stage, StagePatch);
impl_from_patch_and_add!(Healthcheck, HealthcheckPatch);
impl_from_patch_and_add!(ImageName, ImageNamePatch);
impl_from_patch_and_add!(Run, RunPatch);
impl_from_patch_and_add!(Cache, CachePatch);
impl_from_patch_and_add!(Bind, BindPatch);
impl_from_patch_and_add!(Port, PortPatch);
impl_from_patch_and_add!(User, UserPatch);
impl_from_patch_and_add!(CopyOptions, CopyOptionsPatch);
impl_from_patch_and_add!(Copy, CopyPatch);
impl_from_patch_and_add!(CopyContent, CopyContentPatch);
impl_from_patch_and_add!(Add, AddPatch);
impl_from_patch_and_add!(AddGitRepo, AddGitRepoPatch);

//////////////////////// Patch structures ////////////////////////

/// A struct that can be parsed from a string
#[cfg(feature = "permissive")]
#[derive(Debug, Clone, PartialEq, Default)]
pub struct ParsableStruct<T>(pub(crate) T)
where
    T: FromStr;

/// One or many values
#[cfg(feature = "permissive")]
#[derive(Deserialize, Debug, Clone, PartialEq)]
#[serde(from = "OneOrManyDeserializable<T>")]
pub struct OneOrMany<T>(pub Vec<T>);

/// Patch for Vec<T> that handle some commands based on the position:
/// - `_` to replace the whole list
/// - `+` to append to the list
/// - `n` to replace the nth element
/// - `n+` to append to the nth element
/// - `+n` to prepend to the nth element
#[derive(Deserialize, Debug, Clone, PartialEq, Default)]
#[serde(from = "VecPatchDeserializable<T>")]
pub struct VecPatch<T>
where
    T: Clone,
{
    commands: Vec<VecPatchCommand<T>>,
}

#[derive(Debug, Clone, PartialEq)]
enum VecPatchCommand<T> {
    ReplaceAll(Vec<T>),
    Replace(usize, T),
    InsertBefore(usize, Vec<T>),
    InsertAfter(usize, Vec<T>),
    Append(Vec<T>),
}

/// Patch for Vec<T> that handle some commands based on the position:
/// - `_` to replace the whole list
/// - `+` to append to the list
/// - `n` to replace the nth element
/// - `n<` to patch the nth element
/// - `n+` to append to the nth element
/// - `+n` to prepend to the nth element
#[derive(Deserialize, Debug, Clone, PartialEq, Default)]
#[serde(
    from = "VecDeepPatchDeserializable<T, P>",
    bound(deserialize = "T: Clone + From<P>, P: Clone + Deserialize<'de>")
)]
pub struct VecDeepPatch<T, P>
where
    T: Clone + Patch<P> + From<P>,
    P: Clone,
{
    commands: Vec<VecDeepPatchCommand<T, P>>,
}

#[derive(Debug, Clone, PartialEq)]
enum VecDeepPatchCommand<T, P>
where
    T: Clone,
{
    ReplaceAll(Vec<T>),
    Replace(usize, T),
    Patch(usize, P),
    InsertBefore(usize, Vec<T>),
    InsertAfter(usize, Vec<T>),
    Append(Vec<T>),
}

#[derive(Deserialize, Debug, Clone, PartialEq, Default)]
pub struct HashMapPatch<K, V>
where
    K: Clone + Eq + std::hash::Hash,
    V: Clone,
{
    #[serde(flatten)]
    patches: HashMap<K, Option<V>>,
}

#[derive(Deserialize, Debug, Clone, PartialEq, Default)]
pub struct HashMapDeepPatch<K, V>
where
    K: Clone + Eq + std::hash::Hash,
    V: Clone,
{
    #[serde(flatten)]
    patches: HashMap<K, Option<V>>,
}

/// A multilevel key map
#[cfg(not(feature = "strict"))]
#[derive(Deserialize, Debug, Clone, PartialEq, Default)]
#[cfg_attr(feature = "json_schema", derive(JsonSchema))]
pub(crate) struct NestedMap<T>(HashMap<String, NestedMapValue<T>>);

#[cfg(not(feature = "strict"))]
#[derive(Deserialize, Debug, Clone, PartialEq)]
#[cfg_attr(feature = "json_schema", derive(JsonSchema))]
#[serde(untagged)]
enum NestedMapValue<T> {
    Value(T),
    Map(NestedMap<T>),
    Null,
}

//////////////////////// Deserialization structures ////////////////////////

#[derive(Deserialize, Debug, Clone, PartialEq, Eq, Hash)]
#[serde(untagged)]
enum StringOrNumber {
    String(String),
    Number(usize),
}

/// One or many for deserialization
#[cfg(feature = "permissive")]
#[derive(Deserialize, Debug, Clone, PartialEq)]
#[serde(untagged)]
#[cfg_attr(feature = "json_schema", derive(JsonSchema))]
enum OneOrManyDeserializable<T> {
    One(T),
    Many(Vec<T>),
}

#[derive(Deserialize, Debug, Clone, PartialEq)]
#[serde(untagged)]
enum VecPatchDeserializable<T>
where
    T: Clone,
{
    #[cfg(feature = "permissive")]
    Vec(OneOrMany<T>),
    #[cfg(not(feature = "permissive"))]
    Vec(Vec<T>),
    Map(VecPatchCommandMap<T>),
}

#[derive(Debug, Clone, PartialEq)]
struct VecPatchCommandMap<T>
where
    T: Clone,
{
    commands: Vec<VecPatchCommand<T>>,
}

#[derive(Deserialize, Debug, Clone, PartialEq)]
#[serde(
    untagged,
    bound(deserialize = "T: Clone + From<P> + Patch<P>, P: Clone + Deserialize<'de>")
)]
enum VecDeepPatchDeserializable<T, P>
where
    T: Clone + From<P>,
    P: Clone,
{
    Map(VecDeepPatchCommandMap<T, P>),
    #[cfg(feature = "permissive")]
    Vec(OneOrMany<P>),
    #[cfg(not(feature = "permissive"))]
    Vec(Vec<P>),
}

#[derive(Debug, Clone, PartialEq)]
struct VecDeepPatchCommandMap<T, P>
where
    T: Clone,
{
    commands: Vec<VecDeepPatchCommand<T, P>>,
}

//////////////////////// Implementations ////////////////////////

impl From<FromContextPatch> for FromContext {
    fn from(patch: FromContextPatch) -> Self {
        match patch {
            FromContextPatch::FromImage(p) => FromContext::FromImage(p.into()),
            FromContextPatch::FromBuilder(p) => FromContext::FromBuilder(p),
            FromContextPatch::FromContext(p) => FromContext::FromContext(p),
        }
    }
}

impl From<ImageName> for FromContext {
    fn from(image: ImageName) -> Self {
        FromContext::FromImage(image)
    }
}

impl Default for FromContext {
    fn default() -> Self {
        FromContext::FromContext(None)
    }
}

impl FromContext {
    pub fn is_empty(&self) -> bool {
        match self {
            FromContext::FromContext(p) => p.is_none(),
            _ => false,
        }
    }
}

impl Default for FromContextPatch {
    fn default() -> Self {
        FromContextPatch::FromContext(None)
    }
}

impl Default for CopyResourcePatch {
    fn default() -> Self {
        CopyResourcePatch::Unknown(UnknownPatch::default())
    }
}

impl Default for CacheSharing {
    fn default() -> Self {
        CacheSharing::Locked
    }
}

impl From<CopyResourcePatch> for CopyResource {
    fn from(patch: CopyResourcePatch) -> Self {
        match patch {
            CopyResourcePatch::Copy(p) => CopyResource::Copy(p.into()),
            CopyResourcePatch::Content(p) => CopyResource::Content(p.into()),
            CopyResourcePatch::Add(p) => CopyResource::Add(p.into()),
            CopyResourcePatch::AddGitRepo(p) => CopyResource::AddGitRepo(p.into()),
            CopyResourcePatch::Unknown(p) => panic!("Unknown patch: {:?}", p),
        }
    }
}

#[cfg(feature = "permissive")]
impl<T: FromStr> From<T> for ParsableStruct<T> {
    fn from(value: T) -> Self {
        ParsableStruct(value)
    }
}

#[cfg(feature = "permissive")]
impl<T> Default for OneOrMany<T>
where
    T: Sized,
{
    fn default() -> Self {
        OneOrMany(vec![])
    }
}

#[cfg(feature = "permissive")]
impl<T> Deref for OneOrMany<T>
where
    T: Sized,
{
    type Target = Vec<T>;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

#[cfg(feature = "permissive")]
impl<T> From<OneOrManyDeserializable<T>> for OneOrMany<T> {
    fn from(value: OneOrManyDeserializable<T>) -> Self {
        match value {
            OneOrManyDeserializable::One(v) => OneOrMany(vec![v]),
            OneOrManyDeserializable::Many(v) => OneOrMany(v),
        }
    }
}

impl<T> From<VecPatchDeserializable<T>> for VecPatch<T>
where
    T: Clone,
{
    fn from(value: VecPatchDeserializable<T>) -> Self {
        match value {
            #[cfg(feature = "permissive")]
            VecPatchDeserializable::Vec(v) => VecPatch {
                commands: vec![VecPatchCommand::ReplaceAll(v.0)],
            },
            #[cfg(not(feature = "permissive"))]
            VecPatchDeserializable::Vec(v) => VecPatch {
                commands: vec![VecPatchCommand::ReplaceAll(v)],
            },
            VecPatchDeserializable::Map(v) => VecPatch {
                commands: v.commands,
            },
        }
    }
}

impl<T, P> TryFrom<VecDeepPatchCommand<T, P>> for VecPatchCommand<T>
where
    T: Clone + From<P>,
{
    type Error = Error;

    fn try_from(value: VecDeepPatchCommand<T, P>) -> Result<Self, Error> {
        Ok(match value {
            VecDeepPatchCommand::ReplaceAll(v) => VecPatchCommand::ReplaceAll(v),
            VecDeepPatchCommand::Replace(pos, v) => VecPatchCommand::Replace(pos, v),
            VecDeepPatchCommand::Patch(pos, _) => {
                return Err(Error::Custom(format!(
                    "VecPatch don't allow patching on {pos}: '{pos}<'"
                )));
            }
            VecDeepPatchCommand::InsertBefore(pos, v) => VecPatchCommand::InsertBefore(pos, v),
            VecDeepPatchCommand::InsertAfter(pos, v) => VecPatchCommand::InsertAfter(pos, v),
            VecDeepPatchCommand::Append(v) => VecPatchCommand::Append(v),
        })
    }
}

impl<T, P> From<VecDeepPatchDeserializable<T, P>> for VecDeepPatch<T, P>
where
    T: Clone + Patch<P> + From<P>,
    P: Clone,
{
    fn from(value: VecDeepPatchDeserializable<T, P>) -> Self {
        match value {
            #[cfg(feature = "permissive")]
            VecDeepPatchDeserializable::Vec(v) => VecDeepPatch {
                commands: vec![VecDeepPatchCommand::ReplaceAll(
                    v.0.iter().map(|p| p.clone().into()).collect(),
                )],
            },
            #[cfg(not(feature = "permissive"))]
            VecDeepPatchDeserializable::Vec(v) => VecDeepPatch {
                commands: vec![VecDeepPatchCommand::ReplaceAll(
                    v.iter().map(|p| p.clone().into()).collect(),
                )],
            },
            VecDeepPatchDeserializable::Map(v) => VecDeepPatch {
                commands: v.commands,
            },
        }
    }
}

#[cfg(not(feature = "strict"))]
impl<T: Clone> NestedMap<T> {
    fn flatten(&mut self) {
        let keys = self.0.keys().cloned().collect::<Vec<_>>();
        for key in keys {
            if let Some(NestedMapValue::Map(nested_map)) = self.0.get_mut(&key) {
                let mut nested_map = nested_map.clone();
                self.0.remove(&key);
                nested_map.flatten();
                for (nested_key, nested_value) in nested_map.0 {
                    let final_key = format!("{key}.{nested_key}");
                    // Check if the key already exists in the map
                    if !self.0.contains_key(&final_key) {
                        self.0.insert(final_key, nested_value);
                    }
                }
            }
        }
    }
}

//////////////////////// Patch ////////////////////////

impl Patch<FromContextPatch> for FromContext {
    fn apply(&mut self, patch: FromContextPatch) {
        match (self, patch) {
            (Self::FromImage(s), FromContextPatch::FromImage(p)) => s.apply(p),
            (s, patch) => *s = patch.into(),
        }
    }

    fn into_patch(self) -> FromContextPatch {
        match self {
            FromContext::FromImage(s) => FromContextPatch::FromImage(s.into_patch()),
            FromContext::FromBuilder(s) => FromContextPatch::FromBuilder(s),
            FromContext::FromContext(s) => FromContextPatch::FromContext(s),
        }
    }

    fn into_patch_by_diff(self, _previous_struct: Self) -> FromContextPatch {
        todo!()
    }

    fn new_empty_patch() -> FromContextPatch {
        panic!("Cannot create an empty patch for FromContext");
    }
}

impl Patch<CopyResourcePatch> for CopyResource {
    fn apply(&mut self, patch: CopyResourcePatch) {
        match (self, patch) {
            (Self::Copy(s), CopyResourcePatch::Copy(p)) => s.apply(p),
            (Self::Copy(s), CopyResourcePatch::Unknown(p)) => s.apply(p),
            (Self::Content(s), CopyResourcePatch::Content(p)) => s.apply(p),
            (Self::Content(s), CopyResourcePatch::Unknown(p)) => s.apply(p),
            (Self::Add(s), CopyResourcePatch::Add(p)) => s.apply(p),
            (Self::Add(s), CopyResourcePatch::Unknown(p)) => s.apply(p),
            (Self::AddGitRepo(s), CopyResourcePatch::AddGitRepo(p)) => s.apply(p),
            (Self::AddGitRepo(s), CopyResourcePatch::Unknown(p)) => s.apply(p),
            (s, p) => panic!("Cannot apply patch {:?} on {:?}", p, s),
        }
    }

    fn into_patch(self) -> CopyResourcePatch {
        match self {
            CopyResource::Copy(s) => CopyResourcePatch::Copy(s.into_patch()),
            CopyResource::Content(s) => CopyResourcePatch::Content(s.into_patch()),
            CopyResource::Add(s) => CopyResourcePatch::Add(s.into_patch()),
            CopyResource::AddGitRepo(s) => CopyResourcePatch::AddGitRepo(s.into_patch()),
        }
    }

    fn into_patch_by_diff(self, previous_struct: Self) -> CopyResourcePatch {
        match (self, previous_struct) {
            (CopyResource::Copy(s), CopyResource::Copy(p)) => {
                CopyResourcePatch::Copy(s.into_patch_by_diff(p))
            }
            (CopyResource::Add(s), CopyResource::Add(p)) => {
                CopyResourcePatch::Add(s.into_patch_by_diff(p))
            }
            (CopyResource::AddGitRepo(s), CopyResource::AddGitRepo(p)) => {
                CopyResourcePatch::AddGitRepo(s.into_patch_by_diff(p))
            }
            _ => todo!(),
        }
    }

    fn new_empty_patch() -> CopyResourcePatch {
        CopyResourcePatch::default()
    }
}

impl Patch<UnknownPatch> for Copy {
    fn apply(&mut self, patch: UnknownPatch) {
        if let Some(options) = patch.options {
            self.options.apply(options);
        }
    }

    fn into_patch(self) -> UnknownPatch {
        UnknownPatch {
            options: Some(self.options.into_patch()),
            exclude: Some(self.exclude.into_patch()),
        }
    }

    fn into_patch_by_diff(self, previous_struct: Self) -> UnknownPatch {
        UnknownPatch {
            options: Some(self.options.into_patch_by_diff(previous_struct.options)),
            exclude: Some(self.exclude.into_patch_by_diff(previous_struct.exclude)),
        }
    }

    fn new_empty_patch() -> UnknownPatch {
        UnknownPatch::default()
    }
}

impl Patch<UnknownPatch> for CopyContent {
    fn apply(&mut self, patch: UnknownPatch) {
        if let Some(options) = patch.options {
            self.options.apply(options);
        }
    }

    fn into_patch(self) -> UnknownPatch {
        UnknownPatch {
            options: Some(self.options.into_patch()),
            exclude: None,
        }
    }

    fn into_patch_by_diff(self, previous_struct: Self) -> UnknownPatch {
        UnknownPatch {
            options: Some(self.options.into_patch_by_diff(previous_struct.options)),
            exclude: None,
        }
    }

    fn new_empty_patch() -> UnknownPatch {
        UnknownPatch::default()
    }
}

impl Patch<UnknownPatch> for Add {
    fn apply(&mut self, patch: UnknownPatch) {
        if let Some(options) = patch.options {
            self.options.apply(options);
        }
    }

    fn into_patch(self) -> UnknownPatch {
        UnknownPatch {
            options: Some(self.options.into_patch()),
            exclude: None,
        }
    }

    fn into_patch_by_diff(self, previous_struct: Self) -> UnknownPatch {
        UnknownPatch {
            options: Some(self.options.into_patch_by_diff(previous_struct.options)),
            exclude: None,
        }
    }

    fn new_empty_patch() -> UnknownPatch {
        UnknownPatch::default()
    }
}

impl Patch<UnknownPatch> for AddGitRepo {
    fn apply(&mut self, patch: UnknownPatch) {
        if let Some(options) = patch.options {
            self.options.apply(options);
        }
    }

    fn into_patch(self) -> UnknownPatch {
        UnknownPatch {
            options: Some(self.options.into_patch()),
            exclude: Some(self.exclude.into_patch()),
        }
    }

    fn into_patch_by_diff(self, previous_struct: Self) -> UnknownPatch {
        UnknownPatch {
            options: Some(self.options.into_patch_by_diff(previous_struct.options)),
            exclude: Some(self.exclude.into_patch_by_diff(previous_struct.exclude)),
        }
    }

    fn new_empty_patch() -> UnknownPatch {
        UnknownPatch::default()
    }
}

impl<T> Patch<VecPatch<T>> for Vec<T>
where
    T: Clone,
{
    fn apply(&mut self, patch: VecPatch<T>) {
        let mut reset = false;
        let mut last_modified_position: usize = usize::MAX;
        // initial array length
        let initial_len = self.len();
        // save the number of elements added before the positions
        let mut adapted_positions: Vec<usize> = vec![0; self.len()];
        // save the current position and corresponding adapted position to avoid recomputing it
        let mut current_position = 0;
        let mut position_adaptation = 0;

        for command in patch.commands {
            match command {
                VecPatchCommand::ReplaceAll(elements) => {
                    if reset {
                        panic!("Cannot replace the list twice");
                    }
                    reset = true;
                    self.clear();
                    self.extend(elements.into_iter());
                }
                VecPatchCommand::Replace(pos, elements) => {
                    if reset {
                        panic!("Cannot replace element at position {} after a reset", pos);
                    }
                    if pos >= initial_len {
                        panic!("Position {} is out of bounds", pos);
                    }
                    if pos == last_modified_position {
                        panic!(
                            "Cannot replace element at position {} after another modification on it",
                            pos
                        );
                    }
                    for i in current_position..=pos {
                        current_position = i;
                        position_adaptation += adapted_positions[i];
                    }
                    let adapted_position = current_position + position_adaptation;
                    self[adapted_position] = elements;
                    last_modified_position = pos;
                }
                VecPatchCommand::InsertBefore(pos, elements) => {
                    if reset {
                        panic!(
                            "Cannot insert before element at position {} after a reset",
                            pos
                        );
                    }
                    if pos >= initial_len {
                        panic!("Position {} is out of bounds", pos);
                    }
                    for i in current_position..=pos {
                        current_position = i;
                        position_adaptation += adapted_positions[i];
                    }
                    let added = elements.len();
                    let adapted_position = current_position + position_adaptation;
                    self.splice(adapted_position..adapted_position, elements);
                    adapted_positions[pos as usize] += added;
                }
                VecPatchCommand::InsertAfter(pos, elements) => {
                    if reset {
                        panic!(
                            "Cannot insert after element at position {} after a reset",
                            pos
                        );
                    }
                    if pos >= initial_len {
                        panic!("Position {} is out of bounds", pos);
                    }
                    for i in current_position..=pos {
                        current_position = i;
                        position_adaptation += adapted_positions[i];
                    }
                    let adapted_position = current_position + position_adaptation + 1;
                    let added = elements.len();
                    self.splice(adapted_position..adapted_position, elements);
                    if pos + 1 < initial_len {
                        adapted_positions[(pos + 1) as usize] = added;
                    } else {
                        adapted_positions.push(added);
                    }
                }
                VecPatchCommand::Append(elements) => {
                    self.extend(elements);
                }
            }
        }
    }

    fn into_patch(self) -> VecPatch<T> {
        VecPatch {
            commands: vec![VecPatchCommand::ReplaceAll(self)],
        }
    }

    fn into_patch_by_diff(self, _previous_struct: Self) -> VecPatch<T> {
        todo!()
        // the diff is computed by comparing the two arrays
        // let mut commands = vec![];

        // VecPatch { commands }
    }

    fn new_empty_patch() -> VecPatch<T> {
        VecPatch { commands: vec![] }
    }
}

impl<T, P> Patch<VecDeepPatch<T, P>> for Vec<T>
where
    T: Clone + Patch<P> + From<P>,
    P: Clone,
{
    fn apply(&mut self, patch: VecDeepPatch<T, P>) {
        let mut reset = false;
        let mut last_modified_position: usize = usize::MAX;
        // initial array length
        let initial_len = self.len();
        let patch_len = patch.commands.len();
        // save the number of elements added before the positions
        let mut adapted_positions: Vec<usize> = vec![0; self.len()];
        // save the current position and corresponding adapted position to avoid recomputing it
        let mut current_position = 0;
        let mut position_adaptation = 0;

        for command in patch.commands {
            match command {
                VecDeepPatchCommand::ReplaceAll(elements) => {
                    if reset {
                        panic!("Cannot replace the list twice");
                    }
                    if patch_len > 1 {
                        panic!("Cannot combine a replace all with other commands");
                    }
                    reset = true;
                    self.clear();
                    self.extend(elements.into_iter());
                }
                VecDeepPatchCommand::Replace(pos, element) => {
                    if reset {
                        panic!("Cannot replace element at position {} after a reset", pos);
                    }
                    if pos >= initial_len {
                        panic!("Position {} is out of bounds", pos);
                    }
                    if pos == last_modified_position {
                        panic!(
                            "Cannot replace element at position {} after another modification on it",
                            pos
                        );
                    }
                    for i in current_position..=pos {
                        current_position = i;
                        position_adaptation += adapted_positions[i];
                    }
                    let adapted_position = current_position + position_adaptation;
                    self[adapted_position] = element;
                    last_modified_position = pos;
                }
                VecDeepPatchCommand::Patch(pos, element) => {
                    if reset {
                        panic!("Cannot patch element at position {} after a reset", pos);
                    }
                    if pos >= initial_len {
                        panic!("Position {} is out of bounds", pos);
                    }
                    if pos == last_modified_position {
                        panic!(
                            "Cannot patch element at position {} after another modification on it",
                            pos
                        );
                    }
                    for i in current_position..=pos {
                        current_position = i;
                        position_adaptation += adapted_positions[i];
                    }
                    let adapted_position = current_position + position_adaptation;
                    self[adapted_position].apply(element);
                    last_modified_position = pos;
                }
                VecDeepPatchCommand::InsertBefore(pos, elements) => {
                    if reset {
                        panic!(
                            "Cannot insert before element at position {} after a reset",
                            pos
                        );
                    }
                    if pos >= initial_len {
                        panic!("Position {} is out of bounds", pos);
                    }
                    for i in current_position..=pos {
                        current_position = i;
                        position_adaptation += adapted_positions[i];
                    }
                    let adapted_position = current_position + position_adaptation;
                    let added = elements.len();
                    self.splice(adapted_position..adapted_position, elements);
                    adapted_positions[pos as usize] += added;
                }
                VecDeepPatchCommand::InsertAfter(pos, elements) => {
                    if reset {
                        panic!(
                            "Cannot insert after element at position {} after a reset",
                            pos
                        );
                    }
                    if pos >= initial_len {
                        panic!("Position {} is out of bounds", pos);
                    }
                    for i in current_position..=pos {
                        current_position = i;
                        position_adaptation += adapted_positions[i];
                    }
                    let adapted_position = current_position + position_adaptation;
                    let usize_pos = adapted_position + 1;
                    let added = elements.len();
                    self.splice(usize_pos..usize_pos, elements);
                    if pos + 1 < initial_len {
                        adapted_positions[(pos + 1) as usize] = added;
                    } else {
                        adapted_positions.push(added);
                    }
                }
                VecDeepPatchCommand::Append(elements) => {
                    self.extend(elements);
                }
            }
        }
    }

    fn into_patch(self) -> VecDeepPatch<T, P> {
        VecDeepPatch {
            commands: vec![VecDeepPatchCommand::ReplaceAll(self)],
        }
    }

    fn into_patch_by_diff(self, _previous_struct: Self) -> VecDeepPatch<T, P> {
        todo!()
    }

    fn new_empty_patch() -> VecDeepPatch<T, P> {
        VecDeepPatch { commands: vec![] }
    }
}

impl<K, V> Patch<HashMapPatch<K, V>> for HashMap<K, V>
where
    K: Clone + Eq + Hash,
    V: Clone,
{
    fn apply(&mut self, patch: HashMapPatch<K, V>) {
        for (key, value) in patch.patches {
            match value {
                Some(value) => {
                    self.insert(key, value);
                }
                None => {
                    self.remove(&key);
                }
            }
        }
    }

    fn into_patch(self) -> HashMapPatch<K, V> {
        let mut patches = HashMap::new();
        for (key, value) in self {
            patches.insert(key, Some(value));
        }
        HashMapPatch { patches }
    }

    fn into_patch_by_diff(self, _previous_struct: Self) -> HashMapPatch<K, V> {
        todo!()
    }

    fn new_empty_patch() -> HashMapPatch<K, V> {
        HashMapPatch {
            patches: HashMap::new(),
        }
    }
}

impl<K, T, P> Patch<HashMapDeepPatch<K, P>> for HashMap<K, T>
where
    K: Clone + Eq + Hash,
    T: Clone + Patch<P> + From<P>,
    P: Clone,
{
    fn apply(&mut self, patch: HashMapDeepPatch<K, P>) {
        for (key, value) in patch.patches {
            match value {
                Some(value) => {
                    self.insert(key, value.into());
                }
                None => {
                    self.remove(&key);
                }
            }
        }
    }

    fn into_patch(self) -> HashMapDeepPatch<K, P> {
        let mut patches = HashMap::new();
        for (key, value) in self {
            patches.insert(key, Some(value.into_patch()));
        }
        HashMapDeepPatch { patches }
    }

    fn into_patch_by_diff(self, _previous_struct: Self) -> HashMapDeepPatch<K, P> {
        todo!()
    }

    fn new_empty_patch() -> HashMapDeepPatch<K, P> {
        HashMapDeepPatch {
            patches: HashMap::new(),
        }
    }
}

#[cfg(not(feature = "strict"))]
impl<T: Clone> From<NestedMap<T>> for HashMap<String, Option<T>> {
    fn from(value: NestedMap<T>) -> Self {
        let mut value = value.clone();
        value.flatten();
        return value
            .0
            .into_iter()
            .map(|(key, value)| {
                (
                    key,
                    match value {
                        NestedMapValue::Value(value) => Some(value),
                        NestedMapValue::Map(_) => unreachable!(),
                        NestedMapValue::Null => None,
                    },
                )
            })
            .collect();
    }
}

#[cfg(not(feature = "strict"))]
impl<T> Patch<NestedMap<T>> for HashMap<String, T>
where
    T: Clone,
{
    fn apply(&mut self, patch: NestedMap<T>) {
        let flatten: HashMap<String, Option<T>> = patch.into();
        flatten.into_iter().for_each(|(key, opt)| {
            if let Some(value) = opt {
                self.insert(key, value);
            } else {
                self.remove(&key);
            }
        });
    }

    fn into_patch(self) -> NestedMap<T> {
        NestedMap(
            self.into_iter()
                .map(|(key, value)| (key.clone(), NestedMapValue::Value(value)))
                .collect(),
        )
    }

    fn into_patch_by_diff(self, _previous_struct: Self) -> NestedMap<T> {
        todo!()
    }

    fn new_empty_patch() -> NestedMap<T> {
        NestedMap(HashMap::new())
    }
}

//////////////////////// Deserialize ////////////////////////

#[cfg(feature = "permissive")]
impl<'de, T> Deserialize<'de> for ParsableStruct<T>
where
    T: FromStr<Err = serde::de::value::Error> + Sized + Deserialize<'de>,
{
    fn deserialize<D>(deserializer: D) -> Result<ParsableStruct<T>, D::Error>
    where
        D: Deserializer<'de>,
    {
        struct PermissiveStructVisitor<T>(Option<T>);

        impl<'de, T> de::Visitor<'de> for PermissiveStructVisitor<T>
        where
            T: Deserialize<'de> + FromStr<Err = serde::de::value::Error>,
        {
            type Value = T;

            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
                formatter.write_str("a number, a string or a map")
            }

            fn visit_i8<E>(self, v: i8) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                self.visit_str(v.to_string().as_str())
            }

            fn visit_i16<E>(self, v: i16) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                self.visit_str(v.to_string().as_str())
            }

            fn visit_i32<E>(self, v: i32) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                self.visit_str(v.to_string().as_str())
            }

            fn visit_i64<E>(self, v: i64) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                self.visit_str(v.to_string().as_str())
            }

            fn visit_i128<E>(self, v: i128) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                self.visit_str(v.to_string().as_str())
            }

            fn visit_u8<E>(self, v: u8) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                self.visit_str(v.to_string().as_str())
            }

            fn visit_u16<E>(self, v: u16) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                self.visit_str(v.to_string().as_str())
            }

            fn visit_u32<E>(self, v: u32) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                self.visit_str(v.to_string().as_str())
            }

            fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                self.visit_str(v.to_string().as_str())
            }

            fn visit_u128<E>(self, v: u128) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                self.visit_str(v.to_string().as_str())
            }

            fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
            where
                E: de::Error,
            {
                v.parse().map_err(|err| {
                    E::custom(format!("Error while parsing a permissive struct: {}", err))
                })
            }

            fn visit_map<A>(self, map: A) -> Result<Self::Value, A::Error>
            where
                A: de::MapAccess<'de>,
            {
                Deserialize::deserialize(de::value::MapAccessDeserializer::new(map))
            }
        }

        let visitor: PermissiveStructVisitor<T> = PermissiveStructVisitor(None);

        deserializer.deserialize_any(visitor).map(ParsableStruct)
    }
}

impl<'de, T> Deserialize<'de> for VecPatchCommandMap<T>
where
    T: Clone + Deserialize<'de>,
{
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        let commands: Vec<VecDeepPatchCommand<T, T>> =
            deserialize_vec_patch_commands(deserializer)?;
        Ok(VecPatchCommandMap {
            commands: commands
                .iter()
                .map(|c| c.clone().try_into().map_err(de::Error::custom))
                .collect::<Result<Vec<_>, _>>()?,
        })
    }
}

impl<'de, T, P> Deserialize<'de> for VecDeepPatchCommandMap<T, P>
where
    T: Clone + From<P>,
    P: Clone + Deserialize<'de>,
{
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        Ok(VecDeepPatchCommandMap {
            commands: deserialize_vec_patch_commands(deserializer)?,
        })
    }
}

fn deserialize_vec_patch_commands<'de, D, T, P>(
    deserializer: D,
) -> Result<Vec<VecDeepPatchCommand<T, P>>, D::Error>
where
    D: Deserializer<'de>,
    T: Clone + From<P>,
    P: Clone + Deserialize<'de>,
{
    struct VecDeepPatchCommandsVisitor<T, P>(PhantomData<fn() -> BTreeMap<T, P>>);

    #[cfg(feature = "permissive")]
    fn map_vec<T, P>(patch: OneOrMany<P>) -> Vec<T>
    where
        T: Clone + From<P>,
        P: Clone,
    {
        patch.iter().map(|p| p.clone().into()).collect()
    }

    #[cfg(not(feature = "permissive"))]
    fn map_vec<T, P>(patch: Vec<P>) -> Vec<T>
    where
        T: Clone + From<P>,
        P: Clone,
    {
        patch.iter().map(|p| p.clone().into()).collect()
    }

    impl<'de, T, P> de::Visitor<'de> for VecDeepPatchCommandsVisitor<T, P>
    where
        T: Clone + From<P>,
        P: Clone + Deserialize<'de>,
    {
        type Value = Vec<VecDeepPatchCommand<T, P>>;

        fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
            formatter.write_str("a map")
        }

        fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
        where
            A: de::MapAccess<'de>,
        {
            let mut commands = vec![];

            while let Some(key) = map.next_key()? {
                match key {
                    StringOrNumber::String(key) => match key.as_str() {
                        "_" => {
                            commands
                                .push(VecDeepPatchCommand::ReplaceAll(map_vec(map.next_value()?)));
                        }
                        "+" => {
                            commands.push(VecDeepPatchCommand::Append(map_vec(map.next_value()?)));
                        }
                        key => {
                            if key.starts_with('+') {
                                let pos = key[1..key.len()].parse::<usize>().unwrap();
                                commands.push(VecDeepPatchCommand::InsertBefore(
                                    pos,
                                    map_vec(map.next_value()?),
                                ));
                            } else if key.ends_with('+') {
                                let pos = key[..key.len() - 1].parse::<usize>().unwrap();
                                commands.push(VecDeepPatchCommand::InsertAfter(
                                    pos,
                                    map_vec(map.next_value()?),
                                ));
                            } else if key.ends_with('<') {
                                let pos = key[..key.len() - 1].parse::<usize>().unwrap();
                                commands.push(VecDeepPatchCommand::Patch(pos, map.next_value()?));
                            } else {
                                let value: P = map.next_value()?;
                                let pos = key.parse::<usize>().unwrap();
                                commands.push(VecDeepPatchCommand::Replace(pos, value.into()));
                            }
                        }
                    },
                    StringOrNumber::Number(pos) => {
                        let value: P = map.next_value()?;
                        commands.push(VecDeepPatchCommand::Replace(pos, value.into()));
                    }
                }
            }

            // Sort the commands by position and kind
            commands.sort_by(sort_commands);

            Ok(commands)
        }
    }

    let visitor: VecDeepPatchCommandsVisitor<T, P> = VecDeepPatchCommandsVisitor(PhantomData);

    deserializer.deserialize_any(visitor)
}

#[cfg(feature = "permissive")]
pub(crate) fn deserialize_from_optional_string_or_number<'de, D>(
    deserializer: D,
) -> Result<Option<Option<String>>, D::Error>
where
    D: Deserializer<'de>,
{
    let val: Option<StringOrNumber> = Deserialize::deserialize(deserializer)?;

    Ok(Some(val.map(|val| match val {
        StringOrNumber::String(s) => s,
        StringOrNumber::Number(n) => n.to_string(),
    })))
}

fn sort_commands<T, P>(a: &VecDeepPatchCommand<T, P>, b: &VecDeepPatchCommand<T, P>) -> Ordering
where
    T: Clone + From<P>,
    P: Clone,
{
    match (a, b) {
        // ReplaceAll should always be first
        (VecDeepPatchCommand::ReplaceAll(_), _) => std::cmp::Ordering::Less,
        (_, VecDeepPatchCommand::ReplaceAll(_)) => std::cmp::Ordering::Greater,
        // Append should always be last
        (VecDeepPatchCommand::Append(_), _) => std::cmp::Ordering::Greater,
        (_, VecDeepPatchCommand::Append(_)) => std::cmp::Ordering::Less,
        // Same type should be sorted by position
        (VecDeepPatchCommand::InsertBefore(a, _), VecDeepPatchCommand::InsertBefore(b, _))
        | (
            VecDeepPatchCommand::Replace(a, _) | VecDeepPatchCommand::Patch(a, _),
            VecDeepPatchCommand::Replace(b, _) | VecDeepPatchCommand::Patch(b, _),
        )
        | (VecDeepPatchCommand::InsertAfter(a, _), VecDeepPatchCommand::InsertAfter(b, _)) => {
            a.cmp(b)
        }
        /*
        For a same position
            InsertBefore should be before Replace, Patch and InsertAfter
            Replace and Patch should be before InsertAfter
        */
        (
            VecDeepPatchCommand::InsertBefore(a, _),
            VecDeepPatchCommand::Replace(b, _)
            | VecDeepPatchCommand::Patch(b, _)
            | VecDeepPatchCommand::InsertAfter(b, _),
        )
        | (
            VecDeepPatchCommand::Replace(a, _) | VecDeepPatchCommand::Patch(a, _),
            VecDeepPatchCommand::InsertAfter(b, _),
        ) => match a.cmp(b) {
            std::cmp::Ordering::Equal => std::cmp::Ordering::Less,
            other => other,
        },
        (
            VecDeepPatchCommand::Replace(a, _)
            | VecDeepPatchCommand::Patch(a, _)
            | VecDeepPatchCommand::InsertAfter(a, _),
            VecDeepPatchCommand::InsertBefore(b, _),
        )
        | (
            VecDeepPatchCommand::InsertAfter(a, _),
            VecDeepPatchCommand::Replace(b, _) | VecDeepPatchCommand::Patch(b, _),
        ) => match a.cmp(b) {
            std::cmp::Ordering::Equal => std::cmp::Ordering::Greater,
            other => other,
        },
    }
}

//////////////////////// Merge //////////////////////////

// Can't use merge on option since it removes the previous value if it's none
macro_rules! merge_option_patch {
    ($opt_a: expr_2021, $opt_b: expr_2021) => {
        match ($opt_a, $opt_b) {
            (Some(a), Some(b)) => Some(a.merge(b)),
            (Some(a), None) => Some(a),
            (None, Some(b)) => Some(b),
            (None, None) => None,
        }
    };
}

impl Merge for FromContextPatch {
    fn merge(self, other: Self) -> Self {
        match (self, other) {
            (Self::FromImage(a), Self::FromImage(b)) => Self::FromImage(a.merge(b)),
            (_, b) => b,
        }
    }
}

impl Merge for CopyResourcePatch {
    fn merge(self, other: Self) -> Self {
        match (self, other) {
            (Self::Copy(a), Self::Copy(b)) => Self::Copy(a.merge(b)),
            (Self::Copy(a), Self::Unknown(b)) => {
                let mut a = a;
                a.options = merge_option_patch!(a.options, b.options);
                Self::Copy(a)
            }
            (Self::Unknown(a), Self::Copy(b)) => {
                let mut b = b;
                b.options = merge_option_patch!(a.options, b.options);
                Self::Copy(b)
            }
            (Self::Add(a), Self::Add(b)) => Self::Add(a.merge(b)),
            (Self::Add(a), Self::Unknown(b)) => {
                let mut a = a;
                a.options = merge_option_patch!(a.options, b.options);
                Self::Add(a)
            }
            (Self::Unknown(a), Self::Add(b)) => {
                let mut b = b;
                b.options = merge_option_patch!(a.options, b.options);
                Self::Add(b)
            }
            (Self::AddGitRepo(a), Self::AddGitRepo(b)) => Self::AddGitRepo(a.merge(b)),
            (Self::AddGitRepo(a), Self::Unknown(b)) => {
                let mut a = a;
                a.options = merge_option_patch!(a.options, b.options);
                Self::AddGitRepo(a)
            }
            (Self::Unknown(a), Self::AddGitRepo(b)) => {
                let mut b = b;
                b.options = merge_option_patch!(a.options, b.options);
                Self::AddGitRepo(b)
            }
            (Self::Unknown(a), Self::Unknown(b)) => Self::Unknown(a.merge(b)),
            (a, b) => panic!("Can't merge {:?} and {:?}", a, b),
        }
    }
}

impl Merge for UnknownPatch {
    fn merge(self, other: Self) -> Self {
        Self {
            options: merge_option_patch!(self.options, other.options),
            exclude: merge_option_patch!(self.exclude, other.exclude),
        }
    }
}

#[cfg(feature = "permissive")]
impl<T> Merge for ParsableStruct<T>
where
    T: Clone + FromStr + Merge,
{
    fn merge(self, other: Self) -> Self {
        ParsableStruct(self.0.merge(other.0))
    }
}

impl<T> Merge for VecPatch<T>
where
    T: Clone,
{
    fn merge(self, other: Self) -> Self {
        if other.commands.len() == 1
            && matches!(other.commands.first(), Some(VecPatchCommand::ReplaceAll(_)))
        {
            return other;
        }
        if self.commands.len() == 1 {
            if let Some(VecPatchCommand::ReplaceAll(self_vec)) = self.commands.first() {
                let mut self_vec = self_vec.clone();
                self_vec.apply(other);
                return VecPatch {
                    commands: vec![VecPatchCommand::ReplaceAll(self_vec)],
                };
            }
        }

        let mut commands: Vec<VecPatchCommand<T>> = vec![];

        let mut self_it = self.commands.iter();
        let mut rhs_it = other.commands.iter();

        let mut self_next = self_it.next();
        let mut rhs_next = rhs_it.next();

        while let (Some(self_command), Some(rhs_command)) = (self_next, rhs_next) {
            match (self_command.clone(), rhs_command.clone()) {
                (VecPatchCommand::ReplaceAll(_), _) | (_, VecPatchCommand::ReplaceAll(_)) => {
                    panic!("Cannot combine a replace all with other commands");
                }
                (VecPatchCommand::Append(elements), VecPatchCommand::Append(rhs_elements)) => {
                    // For append, we first add self elements then rhs elements
                    // Since we apply the self first and then the rhs the rhs elements will be added after the self elements
                    let mut elements = elements;
                    elements.extend(rhs_elements);
                    commands.push(VecPatchCommand::Append(elements));
                    self_next = self_it.next();
                    rhs_next = rhs_it.next();
                }
                (self_command, VecPatchCommand::Append(_)) => {
                    commands.push(self_command);
                    self_next = self_it.next();
                }
                (VecPatchCommand::Append(_), rhs_command) => {
                    commands.push(rhs_command);
                    rhs_next = rhs_it.next();
                }
                (
                    VecPatchCommand::Replace(self_pos, self_val),
                    VecPatchCommand::Replace(rhs_pos, rhs_val),
                ) => {
                    if self_pos == rhs_pos {
                        commands.push(VecPatchCommand::Replace(rhs_pos, rhs_val));
                        self_next = self_it.next();
                        rhs_next = rhs_it.next();
                    } else if self_pos < rhs_pos {
                        commands.push(VecPatchCommand::Replace(self_pos, self_val));
                        self_next = self_it.next();
                    } else {
                        commands.push(VecPatchCommand::Replace(rhs_pos, rhs_val));
                        rhs_next = rhs_it.next();
                    }
                }
                (
                    VecPatchCommand::InsertBefore(self_pos, self_val),
                    VecPatchCommand::InsertBefore(rhs_pos, mut rhs_val),
                )
                | (
                    VecPatchCommand::InsertAfter(self_pos, self_val),
                    VecPatchCommand::InsertAfter(rhs_pos, mut rhs_val),
                ) => {
                    if self_pos == rhs_pos {
                        // We first add rhs elements then self elements
                        // For insert before, the position is the position of the first element added by the self patch
                        // For insert after, the position does not change so we append rhs elements after the elements, after that the self elements are added
                        rhs_val.extend(self_val);
                        commands.push(rhs_command.clone());
                        self_next = self_it.next();
                        rhs_next = rhs_it.next();
                    } else if self_pos < rhs_pos {
                        commands.push(self_command.clone());
                        self_next = self_it.next();
                    } else {
                        commands.push(rhs_command.clone());
                        rhs_next = rhs_it.next();
                    }
                }
                (
                    VecPatchCommand::Replace(self_pos, _)
                    | VecPatchCommand::InsertBefore(self_pos, _)
                    | VecPatchCommand::InsertAfter(self_pos, _),
                    VecPatchCommand::Replace(rhs_pos, _)
                    | VecPatchCommand::InsertBefore(rhs_pos, _)
                    | VecPatchCommand::InsertAfter(rhs_pos, _),
                ) => {
                    if self_pos == rhs_pos {
                        match (self_command, rhs_command) {
                            (VecPatchCommand::InsertBefore(_, _), _)
                            | (_, VecPatchCommand::InsertAfter(_, _)) => {
                                commands.push(self_command.clone());
                                self_next = self_it.next();
                            }
                            (_, VecPatchCommand::InsertBefore(_, _))
                            | (VecPatchCommand::InsertAfter(_, _), _) => {
                                commands.push(rhs_command.clone());
                                rhs_next = rhs_it.next();
                            }
                            _ => panic!("This case should have been reached"),
                        }
                    } else if self_pos < rhs_pos {
                        commands.push(self_command.clone());
                        self_next = self_it.next();
                    } else {
                        commands.push(rhs_command.clone());
                        rhs_next = rhs_it.next();
                    }
                }
            }
        }

        let remaining_commands = if self_next.is_some() {
            std::iter::once(self_next.unwrap()).chain(self_it)
        } else {
            std::iter::once(rhs_next.unwrap()).chain(self_it)
        };
        remaining_commands.for_each(|c| commands.push(c.clone()));

        Self { commands }
    }
}

impl<T, P> Merge for VecDeepPatch<T, P>
where
    T: Clone + Patch<P> + From<P>,
    P: Clone + Merge,
{
    fn merge(self, other: Self) -> Self {
        if other.commands.len() == 1
            && matches!(
                other.commands.first(),
                Some(VecDeepPatchCommand::ReplaceAll(_))
            )
        {
            return other;
        }
        if self.commands.len() == 1 {
            if let Some(VecDeepPatchCommand::ReplaceAll(self_vec)) = self.commands.first() {
                let mut self_vec = self_vec.clone();
                self_vec.apply(other);
                return VecDeepPatch {
                    commands: vec![VecDeepPatchCommand::ReplaceAll(self_vec)],
                };
            }
        }

        let mut commands: Vec<VecDeepPatchCommand<T, P>> = vec![];

        let mut self_it = self.commands.iter();
        let mut rhs_it = other.commands.iter();

        let mut self_next = self_it.next();
        let mut rhs_next = rhs_it.next();

        while let (Some(self_command), Some(rhs_command)) = (self_next, rhs_next) {
            match (self_command.clone(), rhs_command.clone()) {
                (VecDeepPatchCommand::ReplaceAll(_), _)
                | (_, VecDeepPatchCommand::ReplaceAll(_)) => {
                    panic!("Cannot combine a replace all with other commands");
                }
                (
                    VecDeepPatchCommand::Append(elements),
                    VecDeepPatchCommand::Append(rhs_elements),
                ) => {
                    // For append, we first add self elements then rhs elements
                    // Since we apply the self first and then the rhs the rhs elements will be added after the self elements
                    let mut elements = elements;
                    elements.extend(rhs_elements);
                    commands.push(VecDeepPatchCommand::Append(elements));
                    self_next = self_it.next();
                    rhs_next = rhs_it.next();
                }
                (self_command, VecDeepPatchCommand::Append(_)) => {
                    commands.push(self_command);
                    self_next = self_it.next();
                }
                (VecDeepPatchCommand::Append(_), rhs_command) => {
                    commands.push(rhs_command);
                    rhs_next = rhs_it.next();
                }
                (
                    VecDeepPatchCommand::Replace(self_pos, self_val),
                    VecDeepPatchCommand::Replace(rhs_pos, rhs_val),
                ) => {
                    if self_pos == rhs_pos {
                        commands.push(VecDeepPatchCommand::Replace(rhs_pos, rhs_val));
                        self_next = self_it.next();
                        rhs_next = rhs_it.next();
                    } else if self_pos < rhs_pos {
                        commands.push(VecDeepPatchCommand::Replace(self_pos, self_val));
                        self_next = self_it.next();
                    } else {
                        commands.push(VecDeepPatchCommand::Replace(rhs_pos, rhs_val));
                        rhs_next = rhs_it.next();
                    }
                }
                (
                    VecDeepPatchCommand::Replace(self_pos, self_val),
                    VecDeepPatchCommand::Patch(rhs_pos, rhs_val),
                ) => {
                    if self_pos == rhs_pos {
                        let mut val = self_val.clone();
                        val.apply(rhs_val);
                        commands.push(VecDeepPatchCommand::Replace(rhs_pos, val));
                        self_next = self_it.next();
                        rhs_next = rhs_it.next();
                    } else if self_pos < rhs_pos {
                        commands.push(VecDeepPatchCommand::Replace(self_pos, self_val));
                        self_next = self_it.next();
                    } else {
                        commands.push(VecDeepPatchCommand::Patch(rhs_pos, rhs_val));
                        rhs_next = rhs_it.next();
                    }
                }
                (
                    VecDeepPatchCommand::Patch(self_pos, self_val),
                    VecDeepPatchCommand::Replace(rhs_pos, rhs_val),
                ) => {
                    if self_pos == rhs_pos {
                        commands.push(VecDeepPatchCommand::Replace(rhs_pos, rhs_val));
                        self_next = self_it.next();
                        rhs_next = rhs_it.next();
                    } else if self_pos < rhs_pos {
                        commands.push(VecDeepPatchCommand::Patch(self_pos, self_val));
                        self_next = self_it.next();
                    } else {
                        commands.push(VecDeepPatchCommand::Replace(rhs_pos, rhs_val));
                        rhs_next = rhs_it.next();
                    }
                }
                (
                    VecDeepPatchCommand::Patch(self_pos, self_val),
                    VecDeepPatchCommand::Patch(rhs_pos, rhs_val),
                ) => {
                    if self_pos == rhs_pos {
                        commands.push(VecDeepPatchCommand::Patch(rhs_pos, self_val.merge(rhs_val)));
                        self_next = self_it.next();
                        rhs_next = rhs_it.next();
                    } else if self_pos < rhs_pos {
                        commands.push(VecDeepPatchCommand::Patch(self_pos, self_val));
                        self_next = self_it.next();
                    } else {
                        commands.push(VecDeepPatchCommand::Patch(rhs_pos, rhs_val));
                        rhs_next = rhs_it.next();
                    }
                }
                (
                    VecDeepPatchCommand::InsertBefore(self_pos, self_val),
                    VecDeepPatchCommand::InsertBefore(rhs_pos, mut rhs_val),
                )
                | (
                    VecDeepPatchCommand::InsertAfter(self_pos, self_val),
                    VecDeepPatchCommand::InsertAfter(rhs_pos, mut rhs_val),
                ) => {
                    if self_pos == rhs_pos {
                        // We first add rhs elements then self elements
                        // For insert before, the position is the position of the first element added by the self patch
                        // For insert after, the position does not change so we append rhs elements after the elements, after that the self elements are added
                        rhs_val.extend(self_val);
                        commands.push(rhs_command.clone());
                        self_next = self_it.next();
                        rhs_next = rhs_it.next();
                    } else if self_pos < rhs_pos {
                        commands.push(self_command.clone());
                        self_next = self_it.next();
                    } else {
                        commands.push(rhs_command.clone());
                        rhs_next = rhs_it.next();
                    }
                }
                (
                    VecDeepPatchCommand::Replace(_, _)
                    | VecDeepPatchCommand::Patch(_, _)
                    | VecDeepPatchCommand::InsertBefore(_, _)
                    | VecDeepPatchCommand::InsertAfter(_, _),
                    VecDeepPatchCommand::Replace(_, _)
                    | VecDeepPatchCommand::Patch(_, _)
                    | VecDeepPatchCommand::InsertBefore(_, _)
                    | VecDeepPatchCommand::InsertAfter(_, _),
                ) => {
                    if sort_commands(self_command, rhs_command) == Ordering::Less {
                        commands.push(self_command.clone());
                        self_next = self_it.next();
                    } else {
                        commands.push(rhs_command.clone());
                        rhs_next = rhs_it.next();
                    }
                }
            }
        }

        let remaining_commands = if self_next.is_some() {
            std::iter::once(self_next.unwrap()).chain(self_it)
        } else {
            std::iter::once(rhs_next.unwrap()).chain(self_it)
        };
        remaining_commands.for_each(|c| commands.push(c.clone()));

        Self { commands }
    }
}

impl<K, V> Merge for HashMapPatch<K, V>
where
    K: Clone + Eq + Hash,
    V: Clone,
{
    fn merge(self, other: Self) -> Self {
        let mut patches = self.patches;
        for (key, value) in other.patches {
            match value {
                Some(value) => {
                    patches.insert(key, Some(value));
                }
                None => {
                    patches.remove(&key);
                }
            }
        }
        HashMapPatch { patches }
    }
}

impl<K, V> Merge for HashMapDeepPatch<K, V>
where
    K: Clone + Eq + Hash,
    V: Clone + Merge,
{
    fn merge(mut self, other: Self) -> Self {
        for (key, value) in other.patches {
            match value {
                Some(value) => match self.patches.get_mut(&key) {
                    Some(Some(patch)) => {
                        *patch = patch.clone().merge(value);
                    }
                    _ => {
                        self.patches.insert(key, Some(value));
                    }
                },
                None => {
                    self.patches.remove(&key);
                }
            }
        }
        self
    }
}

#[cfg(not(feature = "strict"))]
impl<T> Merge for NestedMap<T>
where
    T: Clone,
{
    fn merge(mut self, other: Self) -> Self {
        let mut flatten = other.clone();
        flatten.flatten();
        self.flatten();
        for (key, value) in flatten.0 {
            self.0.insert(key.clone(), value.clone());
        }
        self
    }
}

//////////////////////// Unit tests ////////////////////////

#[cfg(test)]
mod test {
    use super::*;
    use pretty_assertions_sorted::assert_eq_sorted;

    #[cfg(feature = "permissive")]
    mod parsable_struct {
        use super::*;

        #[test]
        fn deserialize_basic_user() {
            let user: ParsableStruct<UserPatch> = serde_yaml::from_str("user").unwrap();

            assert_eq_sorted!(
                user,
                ParsableStruct(UserPatch {
                    user: Some("user".into()),
                    group: Some(None),
                })
            );
        }

        #[test]
        fn deserialize_user_error_wrong_username() {
            let res = serde_yaml::from_str::<ParsableStruct<UserPatch>>("user*name");

            assert!(res.is_err());

            assert_eq_sorted!(
                res.unwrap_err().to_string(),
                "Error while parsing a permissive struct: Not matching chown pattern"
            );
        }

        #[test]
        fn deserialize_stage_with_invalid_user() {
            let res = serde_yaml::from_str::<StagePatch>("user: user*name");

            assert!(res.is_err());

            assert_eq_sorted!(
                res.unwrap_err().to_string(),
                "user: Error while parsing a permissive struct: Not matching chown pattern at line 1 column 7"
            );
        }

        #[ignore = "Not managed yet by serde because of multilevel flatten: https://serde.rs/field-attrs.html#flatten"]
        #[test]
        fn deserialize_dofigen_with_invalid_user() {
            let res = serde_yaml::from_str::<DofigenPatch>("user: user*name");

            assert!(res.is_err());

            assert_eq_sorted!(
                res.unwrap_err().to_string(),
                "user: Error while parsing a permissive struct: Not matching chown pattern at line 1 column 7"
            );
        }
    }

    mod vec_patch {
        use super::*;
        use serde::Deserialize;
        use struct_patch::Patch;

        #[derive(Debug, Clone, PartialEq, Patch, Default)]
        #[patch(attribute(derive(Deserialize, Debug, Clone, PartialEq, Default)))]
        struct TestStruct {
            pub name: String,
            #[patch(name = "Option<SubTestStructPatch>")]
            pub sub: Option<SubTestStruct>,
        }

        #[derive(Debug, Clone, PartialEq, Patch, Default)]
        #[patch(attribute(derive(Deserialize, Debug, Clone, PartialEq, Default)))]
        struct SubTestStruct {
            #[patch(name = "VecPatch<String>")]
            pub list: Vec<String>,
            pub num: Option<u32>,
        }

        impl From<TestStructPatch> for TestStruct {
            fn from(patch: TestStructPatch) -> Self {
                let mut sub = Self::default();
                sub.apply(patch);
                sub
            }
        }

        impl From<SubTestStructPatch> for SubTestStruct {
            fn from(patch: SubTestStructPatch) -> Self {
                let mut sub = Self::default();
                sub.apply(patch);
                sub
            }
        }

        #[test]
        fn test_simple_patch() {
            let base = r#"
                name: patch1
                sub:
                  list:
                    - item1
                    - item2
                  num: 42
            "#;

            let patch = r#"
                name: patch2
                sub:
                    num: 43
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch2".into(),
                    sub: Some(SubTestStruct {
                        list: vec!["item1".into(), "item2".into()],
                        num: Some(43)
                    })
                }
            );
        }

        #[test]
        fn test_vec_replace() {
            let base = r#"
                name: patch1
                sub:
                  list:
                    - item1
                    - item2
                  num: 42
            "#;

            let patch = r#"
                sub:
                  list:
                    - item3
                    - item4
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    sub: Some(SubTestStruct {
                        list: vec!["item3".into(), "item4".into()],
                        num: Some(42)
                    })
                }
            );
        }

        #[test]
        fn test_vec_append_list_patch() {
            let base = r#"
                name: patch1
                sub:
                  list:
                    - item1
                    - item2
                  num: 42
            "#;

            let patch = r#"
                sub:
                    list:
                        +:
                            - item3
                            - item4
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    sub: Some(SubTestStruct {
                        list: vec![
                            "item1".into(),
                            "item2".into(),
                            "item3".into(),
                            "item4".into()
                        ],
                        num: Some(42)
                    })
                }
            );
        }

        #[cfg(feature = "permissive")]
        #[test]
        fn test_vec_append_one_patch() {
            let base = r#"
                name: patch1
                sub:
                  list:
                    - item1
                    - item2
                  num: 42
            "#;

            let patch = r#"
                sub:
                    list:
                        +: item3
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    sub: Some(SubTestStruct {
                        list: vec!["item1".into(), "item2".into(), "item3".into()],
                        num: Some(42)
                    })
                }
            );
        }

        #[test]
        fn test_vec_replace_patch() {
            let base = r#"
                name: patch1
                sub:
                  list:
                    - item1
                    - item2
                    - item3
                    - item4
                  num: 42
            "#;

            let patch = r#"
                sub:
                    list:
                        1: item5
                        3: item6
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    sub: Some(SubTestStruct {
                        list: vec![
                            "item1".into(),
                            "item5".into(),
                            "item3".into(),
                            "item6".into()
                        ],
                        num: Some(42)
                    })
                }
            );
        }

        #[test]
        fn test_vec_insert_before_patch() {
            let base = r#"
                name: patch1
                sub:
                  list:
                    - item1
                    - item2
                    - item3
                    - item4
                  num: 42
            "#;

            let patch = r#"
                sub:
                    list:
                        "+1": 
                          - item5
                          - item6
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    sub: Some(SubTestStruct {
                        list: vec![
                            "item1".into(),
                            "item5".into(),
                            "item6".into(),
                            "item2".into(),
                            "item3".into(),
                            "item4".into()
                        ],
                        num: Some(42)
                    })
                }
            );
        }

        #[test]
        fn test_vec_insert_after_patch() {
            let base = r#"
                name: patch1
                sub:
                  list:
                    - item1
                    - item2
                    - item3
                    - item4
                  num: 42
            "#;

            let patch = r#"
                sub:
                    list:
                        1+: 
                          - item5
                          - item6
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    sub: Some(SubTestStruct {
                        list: vec![
                            "item1".into(),
                            "item2".into(),
                            "item5".into(),
                            "item6".into(),
                            "item3".into(),
                            "item4".into()
                        ],
                        num: Some(42)
                    })
                }
            );
        }

        #[test]
        fn test_vec_many_operations_patch() {
            let base = r#"
                name: patch1
                sub:
                  list:
                    - item1
                    - item2
                    - item3
                    - item4
                  num: 42
            "#;

            let patch = r#"
                sub:
                    list:
                        "+2":
                          - item6
                        1+:
                          - item5
                        +:
                          - item7
                        0: item0
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    sub: Some(SubTestStruct {
                        list: vec![
                            "item0".into(),
                            "item2".into(),
                            "item5".into(),
                            "item6".into(),
                            "item3".into(),
                            "item4".into(),
                            "item7".into()
                        ],
                        num: Some(42)
                    })
                }
            );
        }
    }

    mod vec_deep_patch {
        use super::*;
        use serde::Deserialize;
        use struct_patch::Patch;

        #[derive(Debug, Clone, PartialEq, Patch, Default)]
        #[patch(attribute(derive(Deserialize, Debug, Clone, PartialEq, Default)))]
        struct TestStruct {
            pub name: String,
            #[patch(name = "VecDeepPatch<SubTestStruct, SubTestStructPatch>")]
            pub subs: Vec<SubTestStruct>,
        }

        #[derive(Debug, Clone, PartialEq, Patch, Default)]
        #[patch(attribute(derive(Deserialize, Debug, Clone, PartialEq, Default)))]
        struct SubTestStruct {
            pub name: String,
            pub num: u32,
        }

        impl From<TestStructPatch> for TestStruct {
            fn from(patch: TestStructPatch) -> Self {
                let mut sub = Self::default();
                sub.apply(patch);
                sub
            }
        }

        impl From<SubTestStructPatch> for SubTestStruct {
            fn from(patch: SubTestStructPatch) -> Self {
                let mut sub = Self::default();
                sub.apply(patch);
                sub
            }
        }

        #[test]
        fn test_simple_patch() {
            let base = r#"
                name: patch1
                subs:
                  - name: sub1
                    num: 1
                  - name: sub2
                    num: 2
            "#;

            let patch = r#"
                name: patch2
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch2".into(),
                    subs: vec![
                        SubTestStruct {
                            name: "sub1".into(),
                            num: 1
                        },
                        SubTestStruct {
                            name: "sub2".into(),
                            num: 2
                        }
                    ],
                }
            );
        }

        #[test]
        fn test_vec_replace() {
            let base = r#"
                name: patch1
                subs:
                  - name: sub1
                    num: 1
                  - name: sub2
                    num: 2
            "#;

            let patch = r#"
                subs:
                  - name: sub3
                    num: 3
                  - name: sub4
                    num: 4
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    subs: vec![
                        SubTestStruct {
                            name: "sub3".into(),
                            num: 3
                        },
                        SubTestStruct {
                            name: "sub4".into(),
                            num: 4
                        }
                    ]
                }
            );
        }

        #[test]
        fn test_vec_append_list_patch() {
            let base = r#"
                name: patch1
                subs:
                  - name: sub1
                    num: 1
                  - name: sub2
                    num: 2
            "#;

            let patch = r#"
                subs:
                  +:
                    - name: sub3
                      num: 3
                    - name: sub4
                      num: 4
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    subs: vec![
                        SubTestStruct {
                            name: "sub1".into(),
                            num: 1
                        },
                        SubTestStruct {
                            name: "sub2".into(),
                            num: 2
                        },
                        SubTestStruct {
                            name: "sub3".into(),
                            num: 3
                        },
                        SubTestStruct {
                            name: "sub4".into(),
                            num: 4
                        }
                    ]
                }
            );
        }

        #[cfg(feature = "permissive")]
        #[test]
        fn test_vec_append_one_patch() {
            let base = r#"
                name: patch1
                subs:
                  - name: sub1
                    num: 1
                  - name: sub2
                    num: 2
            "#;

            let patch = r#"
                subs:
                  +:
                    name: sub3
                    num: 3
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    subs: vec![
                        SubTestStruct {
                            name: "sub1".into(),
                            num: 1
                        },
                        SubTestStruct {
                            name: "sub2".into(),
                            num: 2
                        },
                        SubTestStruct {
                            name: "sub3".into(),
                            num: 3
                        }
                    ]
                }
            );
        }

        #[test]
        fn test_vec_replace_patch() {
            let base = r#"
                name: patch1
                subs:
                  - name: sub1
                    num: 1
                  - name: sub2
                    num: 2
            "#;

            let patch = r#"
                subs:
                  1: 
                    name: sub3
                    num: 3
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    subs: vec![
                        SubTestStruct {
                            name: "sub1".into(),
                            num: 1
                        },
                        SubTestStruct {
                            name: "sub3".into(),
                            num: 3
                        },
                    ]
                }
            );
        }

        #[test]
        fn test_vec_deep_patch() {
            let base = r#"
                name: patch1
                subs:
                  - name: sub1
                    num: 1
                  - name: sub2
                    num: 2
            "#;

            let patch = r#"
                subs:
                  0<: 
                    num: 3
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    subs: vec![
                        SubTestStruct {
                            name: "sub1".into(),
                            num: 3
                        },
                        SubTestStruct {
                            name: "sub2".into(),
                            num: 2
                        },
                    ]
                }
            );
        }

        #[test]
        fn test_vec_insert_before_patch() {
            let base = r#"
                name: patch1
                subs:
                  - name: sub1
                    num: 1
                  - name: sub2
                    num: 2
                  - name: sub3
                    num: 3
                  - name: sub4
                    num: 4
            "#;

            let patch = r#"
                subs:
                    "+1":
                        - name: sub5
                          num: 5
                        - name: sub6
                          num: 6
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    subs: vec![
                        SubTestStruct {
                            name: "sub1".into(),
                            num: 1
                        },
                        SubTestStruct {
                            name: "sub5".into(),
                            num: 5
                        },
                        SubTestStruct {
                            name: "sub6".into(),
                            num: 6
                        },
                        SubTestStruct {
                            name: "sub2".into(),
                            num: 2
                        },
                        SubTestStruct {
                            name: "sub3".into(),
                            num: 3
                        },
                        SubTestStruct {
                            name: "sub4".into(),
                            num: 4
                        },
                    ]
                }
            );
        }

        #[test]
        fn test_vec_insert_after_patch() {
            let base = r#"
              name: patch1
              subs:
                - name: sub1
                  num: 1
                - name: sub2
                  num: 2
                - name: sub3
                  num: 3
                - name: sub4
                  num: 4
            "#;

            let patch = r#"
                subs:
                  1+:
                    - name: sub5
                      num: 5
                    - name: sub6
                      num: 6
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    subs: vec![
                        SubTestStruct {
                            name: "sub1".into(),
                            num: 1
                        },
                        SubTestStruct {
                            name: "sub2".into(),
                            num: 2
                        },
                        SubTestStruct {
                            name: "sub5".into(),
                            num: 5
                        },
                        SubTestStruct {
                            name: "sub6".into(),
                            num: 6
                        },
                        SubTestStruct {
                            name: "sub3".into(),
                            num: 3
                        },
                        SubTestStruct {
                            name: "sub4".into(),
                            num: 4
                        },
                    ]
                }
            );
        }

        #[test]
        fn test_vec_many_operations_patch() {
            let base = r#"
              name: patch1
              subs:
                - name: sub1
                  num: 1
                - name: sub2
                  num: 2
                - name: sub3
                  num: 3
                - name: sub4
                  num: 4
            "#;

            let patch = r#"
                subs:
                  "+2":
                    - name: sub6
                      num: 6
                  1+:
                    - name: sub5
                      num: 5
                  +:
                    - name: sub7
                      num: 7
                  0:
                    name: sub0
                    num: 0
                  1<:
                    num: 1
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch1".into(),
                    subs: vec![
                        SubTestStruct {
                            name: "sub0".into(),
                            num: 0
                        },
                        SubTestStruct {
                            name: "sub2".into(),
                            num: 1
                        },
                        SubTestStruct {
                            name: "sub5".into(),
                            num: 5
                        },
                        SubTestStruct {
                            name: "sub6".into(),
                            num: 6
                        },
                        SubTestStruct {
                            name: "sub3".into(),
                            num: 3
                        },
                        SubTestStruct {
                            name: "sub4".into(),
                            num: 4
                        },
                        SubTestStruct {
                            name: "sub7".into(),
                            num: 7
                        },
                    ]
                }
            );
        }
    }

    mod hashmap_patch {
        use super::*;
        use serde::Deserialize;
        use struct_patch::Patch;

        #[derive(Debug, Clone, PartialEq, Patch, Default)]
        #[patch(attribute(derive(Deserialize, Debug, Clone, PartialEq, Default)))]
        struct TestStruct {
            pub name: String,
            #[patch(name = "HashMapPatch<String, String>")]
            pub subs: HashMap<String, String>,
        }

        impl From<TestStructPatch> for TestStruct {
            fn from(patch: TestStructPatch) -> Self {
                let mut sub = Self::default();
                sub.apply(patch);
                sub
            }
        }

        #[test]
        fn test_simple_patch() {
            let base = r#"
                name: patch1
                subs:
                  sub1: value1
                  sub2: value2
            "#;

            let patch = r#"
                name: patch2
                subs:
                  sub2: null
                  sub3: value3
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch2".into(),
                    subs: HashMap::from([
                        ("sub1".to_string(), "value1".to_string()),
                        ("sub3".to_string(), "value3".to_string())
                    ])
                }
            );
        }
    }

    mod hashmap_deep_patch {
        use super::*;
        use serde::Deserialize;
        use struct_patch::Patch;

        #[derive(Debug, Clone, PartialEq, Patch, Default)]
        #[patch(attribute(derive(Deserialize, Debug, Clone, PartialEq, Default)))]
        struct TestStruct {
            pub name: String,
            #[patch(name = "HashMapDeepPatch<String, TestSubStructPatch>")]
            pub subs: HashMap<String, TestSubStruct>,
        }

        #[derive(Debug, Clone, PartialEq, Patch, Default)]
        #[patch(attribute(derive(Deserialize, Debug, Clone, PartialEq, Default)))]
        struct TestSubStruct {
            pub name: String,
        }

        impl From<TestStructPatch> for TestStruct {
            fn from(patch: TestStructPatch) -> Self {
                let mut sub = Self::default();
                sub.apply(patch);
                sub
            }
        }

        impl From<TestSubStructPatch> for TestSubStruct {
            fn from(patch: TestSubStructPatch) -> Self {
                let mut sub = Self::default();
                sub.apply(patch);
                sub
            }
        }

        #[test]
        fn test_simple_patch() {
            let base = r#"
                name: patch1
                subs:
                  sub1:
                    name: value1
                  sub2:
                    name: value2
            "#;

            let patch = r#"
                name: patch2
                subs:
                  sub1:
                    name: value2
                  sub2: null
                  sub3:
                    name: value3
            "#;

            let mut base_data: TestStruct = serde_yaml::from_str::<TestStructPatch>(base)
                .unwrap()
                .into();
            let patch_data: TestStructPatch = serde_yaml::from_str(patch).unwrap();

            base_data.apply(patch_data);

            assert_eq_sorted!(
                base_data,
                TestStruct {
                    name: "patch2".into(),
                    subs: HashMap::from([
                        (
                            "sub1".to_string(),
                            TestSubStruct {
                                name: "value2".to_string()
                            }
                        ),
                        (
                            "sub3".to_string(),
                            TestSubStruct {
                                name: "value3".to_string()
                            }
                        )
                    ])
                }
            );
        }
    }

    #[cfg(feature = "permissive")]
    mod nested_map {

        use super::*;

        #[test]
        fn test_nested_map_patch() {
            let mut base_data: HashMap<String, String> =
                HashMap::from([("key1.key2".to_string(), "value2".to_string())]);
            let patch_data: NestedMap<String> = NestedMap(HashMap::from([
                (
                    "key1".to_string(),
                    NestedMapValue::Map(NestedMap(HashMap::from([(
                        "key2".to_string(),
                        NestedMapValue::Value("patch 1".to_string()),
                    )]))),
                ),
                (
                    "key1.key3".to_string(),
                    NestedMapValue::Value("value3".to_string()),
                ),
            ]));

            base_data.apply(patch_data);

            assert_eq!(
                base_data,
                HashMap::from([
                    ("key1.key2".to_string(), "patch 1".to_string()),
                    ("key1.key3".to_string(), "value3".to_string())
                ])
            );
        }
    }

    #[cfg(feature = "permissive")]
    mod deserialize {
        use super::*;

        mod one_or_many {
            use super::*;

            #[derive(Deserialize, Debug, Clone, PartialEq)]
            struct TestStruct {
                pub one_or_many: OneOrMany<String>,
            }

            #[test]
            fn one() {
                let ret: TestStruct = serde_yaml::from_str("one_or_many: test").unwrap();
                assert_eq_sorted!(
                    ret,
                    TestStruct {
                        one_or_many: OneOrMany(vec!["test".into()])
                    }
                )
            }

            #[test]
            fn many() {
                let ret: TestStruct = serde_yaml::from_str("one_or_many: [test]").unwrap();
                assert_eq_sorted!(
                    ret,
                    TestStruct {
                        one_or_many: OneOrMany(vec!["test".into()])
                    }
                )
            }
        }

        mod optional_one_or_many {
            use super::*;

            #[derive(Deserialize, Debug, Clone, PartialEq, Default)]
            struct TestStruct {
                pub test: Option<String>,
                pub one_or_many: Option<OneOrMany<String>>,
            }

            #[test]
            fn one() {
                let ret: TestStruct = serde_yaml::from_str("one_or_many: test").unwrap();
                assert_eq_sorted!(
                    ret,
                    TestStruct {
                        test: None,
                        one_or_many: Some(OneOrMany(vec!["test".into()]))
                    }
                )
            }

            #[test]
            fn many() {
                let ret: TestStruct = serde_yaml::from_str("one_or_many: [test]").unwrap();
                assert_eq_sorted!(
                    ret,
                    TestStruct {
                        test: None,
                        one_or_many: Some(OneOrMany(vec!["test".into()]))
                    }
                )
            }

            #[test]
            fn null() {
                let ret: TestStruct = serde_yaml::from_str("one_or_many: null").unwrap();
                assert_eq_sorted!(
                    ret,
                    TestStruct {
                        test: None,
                        one_or_many: None
                    }
                )
            }

            #[test]
            fn absent() {
                let ret: TestStruct = serde_yaml::from_str("test: test").unwrap();
                assert_eq_sorted!(
                    ret,
                    TestStruct {
                        test: Some("test".into()),
                        one_or_many: None
                    }
                )
            }
        }

        #[cfg(feature = "permissive")]
        mod from_optional_string_or_number {
            use super::*;

            #[derive(Deserialize, Debug, Clone, PartialEq, Default)]
            struct TestStruct {
                #[serde(
                    deserialize_with = "deserialize_from_optional_string_or_number",
                    default
                )]
                pub test: Option<Option<String>>,
            }

            #[test]
            fn string() {
                let ret: TestStruct = serde_yaml::from_str("test: \"123\"").unwrap();
                assert_eq_sorted!(
                    ret,
                    TestStruct {
                        test: Some(Some("123".into()))
                    }
                )
            }

            #[test]
            fn number() {
                let ret: TestStruct = serde_yaml::from_str("test: 123").unwrap();
                assert_eq_sorted!(
                    ret,
                    TestStruct {
                        test: Some(Some("123".into()))
                    }
                )
            }

            #[test]
            fn null() {
                let ret: TestStruct = serde_yaml::from_str("test: null").unwrap();
                assert_eq_sorted!(ret, TestStruct { test: Some(None) })
            }

            #[test]
            fn absent() {
                let ret: TestStruct = serde_yaml::from_str("").unwrap();
                assert_eq_sorted!(ret, TestStruct { test: None })
            }
        }

        mod nested_map {

            use super::*;

            #[test]
            fn test_single_level_map() {
                let yaml = r#"
                        key1: value1
                        key2: value2
                        key3:
                    "#;

                let result: NestedMap<String> = serde_yaml::from_str(yaml).unwrap();

                assert_eq!(
                    result,
                    NestedMap(HashMap::from([
                        (
                            "key1".to_string(),
                            NestedMapValue::Value("value1".to_string())
                        ),
                        (
                            "key2".to_string(),
                            NestedMapValue::Value("value2".to_string())
                        ),
                        ("key3".to_string(), NestedMapValue::Null)
                    ]))
                );
            }

            #[test]
            fn test_multilevel_map() {
                let yaml = r#"
                        key1:
                          key2: value
                    "#;

                let result: NestedMap<String> = serde_yaml::from_str(yaml).unwrap();

                assert_eq!(
                    result,
                    NestedMap(HashMap::from([(
                        "key1".to_string(),
                        NestedMapValue::Map(NestedMap(HashMap::from([(
                            "key2".to_string(),
                            NestedMapValue::Value("value".to_string())
                        )])))
                    )]))
                );
            }

            #[test]
            fn test_equivalent_flattened_map() {
                let yaml = r#"
                          key1.key2: value
                    "#;

                let result: NestedMap<String> = serde_yaml::from_str(yaml).unwrap();

                assert_eq!(
                    result,
                    NestedMap(HashMap::from([(
                        "key1.key2".to_string(),
                        NestedMapValue::Value("value".to_string())
                    )]))
                );
            }

            #[test]
            fn test_combined_multilevel_and_flattened_map() {
                let yaml = r#"
                          key1:
                            key2: value2
                          key1.key3: value3
                    "#;

                let result: NestedMap<String> = serde_yaml::from_str(yaml).unwrap();

                assert_eq!(
                    result,
                    NestedMap(HashMap::from([
                        (
                            "key1".to_string(),
                            NestedMapValue::Map(NestedMap(HashMap::from([(
                                "key2".to_string(),
                                NestedMapValue::Value("value2".to_string())
                            )])))
                        ),
                        (
                            "key1.key3".to_string(),
                            NestedMapValue::Value("value3".to_string())
                        )
                    ]))
                );
            }

            #[test]
            fn test_empty_map() {
                let yaml = r#"
                    "#;

                let result: NestedMap<String> = serde_yaml::from_str(yaml).unwrap();

                assert_eq!(result, NestedMap(HashMap::new()));
            }

            #[test]
            fn test_nested_empty_map() {
                let yaml = r#"
                          key1: {}
                    "#;

                let result: NestedMap<String> = serde_yaml::from_str(yaml).unwrap();

                assert_eq!(
                    result,
                    NestedMap(HashMap::from([(
                        "key1".to_string(),
                        NestedMapValue::Map(NestedMap(HashMap::new()))
                    )]))
                );
            }
        }
    }
}