package errorx

import (
	"fmt"
	"runtime"
)

// AppError 应用错误结构
type AppError struct {
	Code       ErrorCode `json:"code"`
	Message    string    `json:"message"`
	StatusCode int       `json:"-"`
	Data       any       `json:"data,omitempty"`
	ID         string    `json:"id,omitempty"`

	// 调试信息
	originalErr error
	file        string
	params      []any
	sql         string
}

// Error 实现 error 接口
func (e *AppError) Error() string {
	return fmt.Sprintf("[%d] %s", e.Code, e.Message)
}

// Unwrap 允许通过 errors.Unwrap 遍历到原始错误
func (e *AppError) Unwrap() error { return e.originalErr }

// WithData 添加数据
func (e *AppError) WithData(data any) *AppError {
	e.Data = data
	return e
}

// WithMsg 设置消息
func (e *AppError) WithMsg(msg string) *AppError {
	e.Message = msg
	return e
}

func (e *AppError) WithMsgf(format string, args ...any) *AppError {
	msg := fmt.Sprintf(format, args...)
	return e.WithMsg(msg)
}

// WithSQL 记录SQL信息
func (e *AppError) WithSQL(sql string) *AppError {
	e.sql = sql
	return e
}

// WithParams 记录参数信息，并自动获取调用位置
func (e *AppError) WithParams(params ...any) *AppError {
	e.params = params
	if _, file, line, ok := runtime.Caller(1); ok {
		e.file = fmt.Sprintf("%s:%d", file, line)
	}
	return e
}

// NewError 创建应用错误
func NewError(code ErrorCode, statusCode int, message string) *AppError {
	return &AppError{
		Code:       code,
		Message:    message,
		StatusCode: statusCode,
	}
}