package handler

import (
	"dd_fiber_api/internal/order"
	"dd_fiber_api/internal/order/service"
	"strconv"

	"github.com/gofiber/fiber/v2"
)

// OrderHandler 订单处理器
type OrderHandler struct {
	orderService *service.OrderService
}

// NewOrderHandler 创建订单处理器
func NewOrderHandler(orderService *service.OrderService) *OrderHandler {
	return &OrderHandler{
		orderService: orderService,
	}
}

// CreateOrder 创建订单
func (h *OrderHandler) CreateOrder(c *fiber.Ctx) error {
	var req order.CreateOrderRequest
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "请求参数解析失败: " + err.Error(),
		})
	}

	if req.UserID == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "用户ID不能为空",
		})
	}
	if req.CampID == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "打卡营ID不能为空",
		})
	}
	if req.SectionID == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "小节ID不能为空",
		})
	}

	resp, err := h.orderService.CreateOrder(c.Context(), &req)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"success": false,
			"message": "创建订单失败: " + err.Error(),
		})
	}

	if !resp.Success {
		return c.Status(fiber.StatusBadRequest).JSON(resp)
	}

	return c.Status(fiber.StatusOK).JSON(resp)
}

// GetOrder 获取订单详情
func (h *OrderHandler) GetOrder(c *fiber.Ctx) error {
	var req order.GetOrderRequest
	if err := c.QueryParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "请求参数解析失败: " + err.Error(),
		})
	}

	if req.OrderID == "" && req.OrderNo == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "订单ID和订单号至少需要提供一个",
		})
	}

	resp, err := h.orderService.GetOrder(req.OrderID, req.OrderNo)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"success": false,
			"message": "获取订单失败: " + err.Error(),
		})
	}

	if !resp.Success {
		return c.Status(fiber.StatusNotFound).JSON(resp)
	}

	return c.Status(fiber.StatusOK).JSON(resp)
}

// ListOrders 查询订单列表
func (h *OrderHandler) ListOrders(c *fiber.Ctx) error {
	var req order.ListOrdersRequest
	if err := c.QueryParser(&req); err != nil {
		req.Page = 1
		req.PageSize = 20
	}

	// 解析 OrderStatus
	orderStatusStr := c.Query("order_status")
	if orderStatusStr != "" {
		if orderStatusInt, err := strconv.Atoi(orderStatusStr); err == nil {
			req.OrderStatus = order.OrderStatus(orderStatusInt)
		}
	}

	// 解析 PaymentMethod
	paymentMethodStr := c.Query("payment_method")
	if paymentMethodStr != "" {
		if paymentMethodInt, err := strconv.Atoi(paymentMethodStr); err == nil {
			req.PaymentMethod = order.PaymentMethod(paymentMethodInt)
		}
	}

	resp, err := h.orderService.ListOrders(&req)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"success": false,
			"message": "查询订单列表失败: " + err.Error(),
		})
	}

	return c.Status(fiber.StatusOK).JSON(resp)
}

// UpdateOrderStatus 更新订单状态
func (h *OrderHandler) UpdateOrderStatus(c *fiber.Ctx) error {
	var req order.UpdateOrderStatusRequest
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "请求参数解析失败: " + err.Error(),
		})
	}

	if req.OrderID == "" && req.OrderNo == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "订单ID和订单号至少需要提供一个",
		})
	}

	resp, err := h.orderService.UpdateOrderStatus(&req)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"success": false,
			"message": "更新订单状态失败: " + err.Error(),
		})
	}

	if !resp.Success {
		return c.Status(fiber.StatusBadRequest).JSON(resp)
	}

	return c.Status(fiber.StatusOK).JSON(resp)
}

// CancelOrder 取消订单
func (h *OrderHandler) CancelOrder(c *fiber.Ctx) error {
	var req order.CancelOrderRequest
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "请求参数解析失败: " + err.Error(),
		})
	}

	if req.OrderID == "" && req.OrderNo == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "订单ID和订单号至少需要提供一个",
		})
	}

	resp, err := h.orderService.CancelOrder(&req)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"success": false,
			"message": "取消订单失败: " + err.Error(),
		})
	}

	if !resp.Success {
		return c.Status(fiber.StatusBadRequest).JSON(resp)
	}

	return c.Status(fiber.StatusOK).JSON(resp)
}

// AutoCancelOrder 自动关闭订单（用于定时任务回调）
func (h *OrderHandler) AutoCancelOrder(c *fiber.Ctx) error {
	orderID := c.Query("order_id")
	if orderID == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"success": false,
			"message": "订单ID不能为空",
		})
	}

	// 查询订单当前状态
	orderObj, err := h.orderService.GetOrder(orderID, "")
	if err != nil || orderObj == nil || !orderObj.Success {
		return c.Status(fiber.StatusOK).JSON(fiber.Map{
			"success": false,
			"message": "订单不存在或已处理",
		})
	}

	// 如果订单已经是最终状态（已支付、已取消、已退款等），不需要再次关闭
	if orderObj.Order.Status != order.OrderStatusPending {
		return c.Status(fiber.StatusOK).JSON(fiber.Map{
			"success": true,
			"message": "订单状态已变更，无需关闭",
		})
	}

	// 关闭订单
	resp, err := h.orderService.CancelOrder(&order.CancelOrderRequest{
		OrderID: orderID,
	})
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"success": false,
			"message": "关闭订单失败: " + err.Error(),
		})
	}

	return c.Status(fiber.StatusOK).JSON(resp)
}