use std::collections::{HashMap, HashSet};

use roadblk_attr::ConstraintType;
use serde::{Deserialize, Serialize};

use apidoc_attr::{prop::ParsedApiDocAttr, serde::ParsedSerdeAttr};

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub enum ApiNumber {
    I8,
    I16,
    I32,
    I64,
    I128,
    U8,
    U16,
    U32,
    USize,
    U64,
    U128,
    F32,
    F64,
}

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub struct ApiEnumer {
    // 标识符
    pub ident: String,

    // 名称
    pub name: Option<String>,

    // 描述
    pub prop: Option<ParsedApiDocAttr>,

    // 序列化/反序列化
    pub serde: Vec<ParsedSerdeAttr>,

    // 枚举项: 模型id
    pub variants: Vec<String>,
}

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub struct ApiNamedField {
    // 标识符
    pub ident: String,

    // 名称
    pub name: Option<String>,

    // 参数说明
    pub prop: Option<ParsedApiDocAttr>,

    // 是否必传
    pub option: bool,

    // 类型
    pub ty: ApiTy,

    // 约束
    pub constraint: Vec<ConstraintType>,

    // 序列化/反序列化
    pub serde: Vec<ParsedSerdeAttr>,
}

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub struct ApiUnamedField {
    // 参数名称,元组结构体没有名称
    pub index: i32,

    // 名称
    pub name: Option<String>,

    // 参数说明
    pub prop: Option<ParsedApiDocAttr>,

    // 是否必传
    pub option: bool,

    // 类型
    pub ty: ApiTy,

    // 约束
    pub constraint: Vec<ConstraintType>,

    // 序列化/反序列化
    pub serde: Vec<ParsedSerdeAttr>,
}

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub enum ApiFields {
    Named(Vec<ApiNamedField>),
    Unnamed(Vec<ApiUnamedField>),
    Unit,
}

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub struct ApiModel {
    // 标识符
    pub ident: String,

    // 名称
    pub name: Option<String>,

    // 描述
    pub prop: Option<ParsedApiDocAttr>,

    // 值
    pub value: Option<i32>,

    // 序列化/反序列化
    pub serde: Vec<ParsedSerdeAttr>,

    // 字段
    pub fields: ApiFields,
}

#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
pub enum ApiTy {
    Bool,

    String,

    Number(ApiNumber),

    File,

    Enumer(Box<ApiEnumer>),

    Struct { model_id: String },

    Map(Box<ApiTy>, Box<ApiTy>),

    Set(Box<ApiTy>),

    List(Box<ApiTy>),
}

pub trait ApiTyTrait {
    fn api_collect_ty(models: &mut HashMap<String, Option<ApiModel>>) -> ApiTy;

    fn api_option() -> bool {
        false
    }

    fn api_model_id() -> String {
        let type_name = std::any::type_name::<Self>();
        type_name.to_string()
    }
}

macro_rules! impl_ty_number {
    ($primite: ident, $item: ident) => {
        impl ApiTyTrait for $primite {
            fn api_collect_ty(_models: &mut HashMap<String, Option<ApiModel>>) -> ApiTy {
                ApiTy::Number(ApiNumber::$item)
            }
        }
    };
}
impl_ty_number!(i8, I8);
impl_ty_number!(i16, I16);
impl_ty_number!(i32, I32);
impl_ty_number!(i64, I64);
impl_ty_number!(i128, I128);
impl_ty_number!(u8, U8);
impl_ty_number!(usize, USize);
impl_ty_number!(u16, U16);
impl_ty_number!(u32, U32);
impl_ty_number!(u64, U64);
impl_ty_number!(u128, U128);
impl_ty_number!(f32, F32);
impl_ty_number!(f64, F64);

impl ApiTyTrait for String {
    fn api_collect_ty(_models: &mut HashMap<String, Option<ApiModel>>) -> ApiTy {
        ApiTy::String
    }
}
impl ApiTyTrait for bool {
    fn api_collect_ty(_models: &mut HashMap<String, Option<ApiModel>>) -> ApiTy {
        ApiTy::Bool
    }
}
impl<T: ApiTyTrait> ApiTyTrait for Option<T> {
    fn api_collect_ty(models: &mut HashMap<String, Option<ApiModel>>) -> ApiTy {
        T::api_collect_ty(models)
    }

    fn api_option() -> bool {
        true
    }
}
impl<T: ApiTyTrait> ApiTyTrait for Vec<T> {
    fn api_collect_ty(models: &mut HashMap<String, Option<ApiModel>>) -> ApiTy {
        ApiTy::List(Box::new(T::api_collect_ty(models)))
    }
}
impl<T: ApiTyTrait> ApiTyTrait for HashSet<T> {
    fn api_collect_ty(models: &mut HashMap<String, Option<ApiModel>>) -> ApiTy {
        ApiTy::Set(Box::new(T::api_collect_ty(models)))
    }
}
impl<K: ApiTyTrait, V: ApiTyTrait> ApiTyTrait for HashMap<K, V> {
    fn api_collect_ty(models: &mut HashMap<String, Option<ApiModel>>) -> ApiTy {
        ApiTy::Map(
            Box::new(K::api_collect_ty(models)),
            Box::new(V::api_collect_ty(models)),
        )
    }
}