package exceptions

import (
	"strings"
)

type OperationType int16

const (
	OPERATE_CREATE OperationType = iota
	OPERATE_UPDATE
	OPERATE_DELETE
	OEPRATE_QUERY
	OPERATE_CALCULATE
	OPERATE_DB
	OPERATE_DB_TRANSACTION
	OPERATE_CUSTOM OperationType = 98
	OPERATE_OTHER  OperationType = 99
)

type UnsuccessfulOperationError struct {
	Operate     OperationType
	Description string
	Message     string
}

func NewUnsuccessfulOperationError(oeprate OperationType, describe, message string) *UnsuccessfulOperationError {
	return &UnsuccessfulOperationError{
		Operate:     oeprate,
		Description: describe,
		Message:     message,
	}
}

func NewUnsuccessCreateError(message string) *UnsuccessfulOperationError {
	return &UnsuccessfulOperationError{
		Operate: OPERATE_CREATE,
		Message: message,
	}
}

func NewUnsuccessUpdateError(message string) *UnsuccessfulOperationError {
	return &UnsuccessfulOperationError{
		Operate: OPERATE_UPDATE,
		Message: message,
	}
}

func NewUnsuccessDeleteError(message string) *UnsuccessfulOperationError {
	return &UnsuccessfulOperationError{
		Operate: OPERATE_DELETE,
		Message: message,
	}
}

func NewUnsuccessQueryError(message string) *UnsuccessfulOperationError {
	return &UnsuccessfulOperationError{
		Operate: OEPRATE_QUERY,
		Message: message,
	}
}

func NewUnsuccessCalculateError(message string) *UnsuccessfulOperationError {
	return &UnsuccessfulOperationError{
		Operate: OPERATE_CALCULATE,
		Message: message,
	}
}

func NewUnsuccessDBError(message string) *UnsuccessfulOperationError {
	return &UnsuccessfulOperationError{
		Operate: OPERATE_DB,
		Message: message,
	}
}

func NewUnsuccessDBTransactionError(message string) *UnsuccessfulOperationError {
	return &UnsuccessfulOperationError{
		Operate: OPERATE_DB_TRANSACTION,
		Message: message,
	}
}

func NewUnsuccessCustomError(describe, message string) *UnsuccessfulOperationError {
	return &UnsuccessfulOperationError{
		Operate:     OPERATE_CUSTOM,
		Description: describe,
		Message:     message,
	}
}

func NewUnsuccessOtherError(message string) *UnsuccessfulOperationError {
	return &UnsuccessfulOperationError{
		Operate: OPERATE_OTHER,
		Message: message,
	}
}

func (e UnsuccessfulOperationError) Error() string {
	var builder strings.Builder
	switch e.Operate {
	case OPERATE_CREATE:
		builder.WriteString("创建")
	case OPERATE_UPDATE:
		builder.WriteString("更新")
	case OPERATE_DELETE:
		builder.WriteString("删除")
	case OEPRATE_QUERY:
		builder.WriteString("查询")
	case OPERATE_CALCULATE:
		builder.WriteString("计算")
	case OPERATE_DB:
		builder.WriteString("数据库")
	case OPERATE_DB_TRANSACTION:
		builder.WriteString("数据库事务")
	case OPERATE_CUSTOM:
		builder.WriteString(e.Description)
	case OPERATE_OTHER:
		builder.WriteString("其他")
	default:
		builder.WriteString("未知")
	}
	builder.WriteString("操作不成功，")
	if len(e.Message) > 0 {
		builder.WriteString(e.Message)
	} else {
		builder.WriteString("未知原因")
	}
	return builder.String()
}