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use std::collections::HashMap;
use serde::ser::SerializeMap;

use crate::dsl::schema::DocumentRoot;
use crate::dsl::schema::Schema;
use crate::dsl::schema::SchemaList;
use crate::output::UiObject;
use crate::output::UiObjectProperty;
use crate::output::UiObjectRoot;
use serde::Serialize;
use serde::Serializer;
use crate::dsl::schema::KeysSchema;
use crate::output::UiOptions;
use crate::dsl::schema::Annotations;
use crate::dsl::schema::Widget;
use crate::dsl::schema::object_types::RawObjectType;

impl From<DocumentRoot> for UiObjectRoot {
    fn from(root: DocumentRoot) -> Self {
        UiObjectRoot(Some(root.schema().into()))
    }
}

impl From<SchemaList> for UiObject {
    fn from(list: SchemaList) -> Self {
        let ui_object_entries: Vec<(String, UiObjectProperty)> = list
            .entries()
            .iter()
            .filter_map(|entry| {
                let property: UiObjectProperty = entry.schema.clone().into();
                if !property.is_empty() {
                    Some((entry.name.clone(), property))
                } else {
                    None
                }
            })
            .collect();

        let ui_object_entries: HashMap<String, UiObjectProperty> = ui_object_entries.into_iter().collect();
        UiObject(ui_object_entries)
    }
}

impl From<Schema> for UiObjectProperty {
    fn from(schema: Schema) -> Self {
        let annotations = schema.annotations.clone();
        let (help, warning, description) = help_warning_description(&annotations);
        let widget = widget(&schema);
        let placeholder = placeholder(&annotations);
        let readonly = readonly(&annotations);
        let keys_values = schema.dynamic.map(|keys_values| keys_values.keys);

        let children = schema.children;
        let children_ui_objects = children.clone().map(|children| children.into());
        let order = children
            .clone()
            .map(|list| list.all_names().iter().map(|name| name.to_string()).collect());

        let ui_options = ui_options(&annotations);

        UiObjectProperty {
            help,
            warning,
            description,
            placeholder,
            widget,
            properties: children_ui_objects,
            keys: keys_values,
            ui_options,
            readonly,
            order,
        }
    }
}

impl Serialize for KeysSchema {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        let mut map = serializer.serialize_map(None)?;
        if let Some(title) = &self.title {
            let mut keys_definition = HashMap::new();
            keys_definition.insert("ui:title", title);
            map.serialize_entry("ui:keys", &keys_definition)?;
        }
        map.end()
    }
}

fn ui_options(annotations: &Annotations) -> Option<UiOptions> {
    let default_ui_options = UiOptions::default();
    let ui_options = UiOptions {
        removable: annotations.removable.unwrap_or(default_ui_options.removable),
        addable: annotations.addable.unwrap_or(default_ui_options.addable),
        orderable: annotations.orderable.unwrap_or(default_ui_options.orderable),
    };
    if ui_options == default_ui_options {
        None
    } else {
        Some(ui_options)
    }
}

fn widget(schema: &Schema) -> Option<Widget> {
    let annotations = &schema.annotations;
    if let RawObjectType::Password(_) = schema.object_type.inner_raw() {
        return Some(Widget::Password);
    }
    if annotations.writeonly.unwrap_or(false) {
        return Some(Widget::Password);
    }
    if annotations.hidden.unwrap_or(false) {
        return Some(Widget::Hidden);
    }
    annotations.widget.clone()
}

fn help_warning_description(annotations: &Annotations) -> (Option<String>, Option<String>, Option<String>) {
    let help = &annotations.help;
    let warning = &annotations.warning;
    let description = &annotations.description;
    (help.clone(), warning.clone(), description.clone())
}

fn placeholder(annotations: &Annotations) -> Option<String> {
    let placeholder = &annotations.placeholder;
    placeholder.clone()
}

fn readonly(annotations: &Annotations) -> Option<bool> {
    annotations.readonly
}