package handlers

import (
	"fmt"
	"time"

	"github.com/gin-gonic/gin"
	"gorm.io/gorm"

	"soda-api/backend/internal/models"
	"soda-api/backend/internal/utils"
)

type OrderHandler struct {
	db *gorm.DB
}

func NewOrderHandler(db *gorm.DB) *OrderHandler {
	return &OrderHandler{db: db}
}

func (h *OrderHandler) List(c *gin.Context) {
	var orders []models.Order
	if err := h.db.Preload("Product").Order("id desc").Find(&orders).Error; err != nil {
		utils.JSONError(c, 500, "獲取訂單資料錯誤")
		return
	}
	utils.JSONSuccess(c, orders)
}

func (h *OrderHandler) Create(c *gin.Context) {
	var payload models.Order
	if err := c.ShouldBindJSON(&payload); err != nil {
		utils.JSONError(c, 400, "訂單資料不完整")
		return
	}
	payload.OrderNumber = fmt.Sprintf("OD-%d", time.Now().UnixNano())
	if payload.Status == "" {
		payload.Status = "待支付"
	}
	if err := h.db.Create(&payload).Error; err != nil {
		utils.JSONError(c, 500, "創建訂單失敗")
		return
	}
	utils.JSONSuccess(c, payload)
}

func (h *OrderHandler) Update(c *gin.Context) {
	var order models.Order
	if err := h.db.First(&order, c.Param("id")).Error; err != nil {
		utils.JSONError(c, 404, "订单不存在")
		return
	}
	if err := c.ShouldBindJSON(&order); err != nil {
		utils.JSONError(c, 400, "订单数据无效")
		return
	}
	if err := h.db.Save(&order).Error; err != nil {
		utils.JSONError(c, 500, "更新订单失败")
		return
	}
	utils.JSONSuccess(c, order)
}

func (h *OrderHandler) Delete(c *gin.Context) {
	if err := h.db.Delete(&models.Order{}, c.Param("id")).Error; err != nil {
		utils.JSONError(c, 500, "删除订单失败")
		return
	}
	utils.JSONSuccess(c, gin.H{"message": "删除成功"})
}