package model

import "time"

type OrderStatus string

const (
	StatusPending  OrderStatus = "pending"
	StatusAccepted OrderStatus = "accepted"
	StatusCanceled OrderStatus = "canceled"
)

type Order struct {
	ID          string      `json:"id"`
	Status      OrderStatus `json:"status"`
	ServiceTime time.Time   `json:"service_time"`
	Duration    int         `json:"duration"`
	Address     string      `json:"address"`
	ProviderID  *string    `json:"provider_id"`
	CreatedAt   time.Time  `json:"created_at"`
	UpdatedAt   time.Time  `json:"updated_at"`
}

type CreateOrderRequest struct {
	ServiceTime time.Time `json:"service_time" binding:"required"`
	Duration    int       `json:"duration" binding:"required,gt=0"`
	Address     string    `json:"address" binding:"required"`
}

type AcceptOrderRequest struct {
	ProviderID string `json:"provider_id" binding:"required"`
}

type CancelOrderRequest struct{}

type AppError struct {
	Code       string `json:"error"`
	Message    string `json:"message"`
	HTTPStatus int    `json:"-"`
}

func NewAppError(code, message string, httpStatus int) *AppError {
	return &AppError{Code: code, Message: message, HTTPStatus: httpStatus}
}

func (e *AppError) Error() string {
	return e.Message
}

// 预定义错误
var (
	ErrNotFound       = NewAppError("not_found", "订单不存在", 404)
	ErrConflict       = NewAppError("conflict", "订单已被其他服务者接单", 409)
	ErrInvalidState   = func(op string) *AppError {
		return NewAppError("invalid_state", "订单已取消，无法" + op, 400)
	}
	ErrStatusConflict = NewAppError("conflict", "订单状态已变更，请重试", 409)
)