package components

import (
		"fmt"
		"gitee.com/nuokwan_backend_group/mvc/Base"
		"runtime"
		"strings"
)

// 自定义
type CustomError struct {
		code    int
		message string
		ErrType string
		Parent  error
}

func NewCustomError(msg string, code int, tyName string, parent ...error) Base.ErrorInstance {
		var parentError error
		if len(parent) > 0 {
				parentError = parent[0]
		}
		return &CustomError{
				code:    code,
				message: msg,
				ErrType: tyName,
				Parent:  parentError,
		}
}

func (c *CustomError) Error() string {
		return fmt.Sprintf("message:%s,code: %d", c.Message(), c.Code())
}

func (c *CustomError) Code() int {
		return c.code
}

func (c *CustomError) ErrorType() string {
		return c.ErrType
}

func (c *CustomError) Message() string {
		return c.message
}

func (c *CustomError) Traces() []string {
		var stack []string
		if c.code != 0 && c.message != "" {
				for i := 4; ; i++ {
						pc, file, line, ok := runtime.Caller(i)
						if !ok {
								break
						}
						f := runtime.FuncForPC(pc)
						if f.Name() != "runtime.main" && f.Name() != "runtime.goexit" {
								str := fmt.Sprintf("file:%s, at    dline:%d ,funcName:%s, error:%s", file, line, f.Name(), c.Error())
								stack = append(stack, str)
						}
				}
		}
		return stack
}

func (c *CustomError) TraceString() string {
		return strings.Join(c.Traces(), "\n")
}

func (c *CustomError) Set(key string, value interface{}) Base.ErrorInstance {
		switch key {
		case "code":
				c.code = value.(int)
		case "message":
				if c.message != "" {
						c.message = value.(string)
				}
		case "errorType":
				if c.ErrType == "" {
						c.ErrType = value.(string)
				}
		case "parent":
				if c.Parent == nil {
						switch value.(type) {
						case Base.ErrorInstance:
								c.Parent = value.(Base.ErrorInstance)
						case error:
								err := value.(error)
								c.Parent = NewError(0, err.Error())
						}
				}
		}
		return c
}

func NewError(code int, msg string, parent ...error) Base.ErrorInstance {
		return NewCustomError(msg, code, "error", parent...)
}

func (c *CustomError) New(msg string, code int, parent ...error) error {
		return NewCustomError(msg, code, c.ErrType).Set("parent", parent)
}