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use std::collections::HashMap;

#[cfg(feature = "core")]
use serde::{Deserialize, Serialize};

#[cfg(feature = "proc")]
use procmeta::prelude::*;

#[cfg_attr(feature = "core", derive(Debug, Serialize, Deserialize, Clone))]
#[cfg_attr(feature = "proc", derive(GetTokenStream))]
pub enum Value {
    Null,

    Bool(bool),

    Number(Number),

    String(String),

    Array(Vec<Value>),

    Object(HashMap<String, Value>),
}

#[cfg_attr(feature = "core", derive(Debug, Serialize, Deserialize, Clone))]
#[cfg_attr(feature = "proc", derive(GetTokenStream))]
pub enum Number {
    PosInt(u64),
    NegInt(i64),
    Float(f64),
}

#[cfg_attr(feature = "core", derive(Debug, Serialize, Deserialize, Clone))]
#[cfg_attr(feature = "proc", derive(GetTokenStream))]
pub enum ConstraintType {
    // 无
    None,

    // 描述
    Description(String),

    // 校验器
    SelfValidator,

    // 正则表达式
    Regex(String),

    // 值
    Value(Value),

    // 数值范围
    Range(Number, Number),

    // 长度
    Length(usize, usize),

    // 其中一个
    Anyone(Vec<ConstraintType>),

    // 枚举: 模型信息
    Enumer(String),
}

#[cfg_attr(feature = "core", derive(Debug, Serialize, Deserialize, Clone))]
#[cfg_attr(feature = "proc", derive(GetTokenStream))]
pub struct LengthError {
    pub min: usize,
    pub max: usize,
    pub len: usize,
}

#[cfg_attr(feature = "core", derive(Debug, Serialize, Deserialize, Clone))]
#[cfg_attr(feature = "proc", derive(GetTokenStream))]
pub struct RangeError {
    pub min: String,
    pub max: String,
    pub value: String,
}

#[cfg_attr(feature = "core", derive(Debug, Serialize, Deserialize, Clone))]
#[cfg_attr(feature = "proc", derive(GetTokenStream))]
pub struct RegexError {
    pub regex: String,
    pub value: String,
}

#[cfg_attr(feature = "core", derive(Debug, Serialize, Deserialize, Clone))]
#[cfg_attr(feature = "proc", derive(GetTokenStream))]
pub struct EnumError;

#[cfg_attr(feature = "core", derive(Debug, Serialize, Deserialize, Clone))]
#[cfg_attr(feature = "proc", derive(GetTokenStream))]
pub enum ErrorType {
    Regex(RegexError),

    Length(LengthError),

    Range(RangeError),

    Model(ModelValidatorError),

    Enumer(EnumError),

    Value,

    Other,
}

#[cfg_attr(feature = "core", derive(Debug, Serialize, Deserialize, Clone))]
#[cfg_attr(feature = "proc", derive(GetTokenStream))]
pub struct ModelValidatorError {
    pub error_ty: Box<ErrorType>,
    pub error_message: Option<String>,
    pub field_id: Option<String>,
    pub field_name: Option<String>,
}

impl From<LengthError> for ErrorType {
    fn from(value: LengthError) -> Self {
        Self::Length(value)
    }
}

impl From<RangeError> for ErrorType {
    fn from(value: RangeError) -> Self {
        Self::Range(value)
    }
}

impl From<ModelValidatorError> for ErrorType {
    fn from(value: ModelValidatorError) -> Self {
        Self::Model(value)
    }
}

impl From<RegexError> for ErrorType {
    fn from(value: RegexError) -> Self {
        Self::Regex(value)
    }
}

impl From<EnumError> for ErrorType {
    fn from(value: EnumError) -> Self {
        Self::Enumer(value)
    }
}