package http

import (
	"enaklo-pos-be/internal/common/errors"
	"enaklo-pos-be/internal/entity"
	"enaklo-pos-be/internal/handlers/request"
	"enaklo-pos-be/internal/handlers/response"
	"enaklo-pos-be/internal/services/v2/inprogress_order"
	"github.com/gin-gonic/gin"
	"github.com/go-playground/validator/v10"
	"net/http"
	"strconv"
)

type InProgressOrderHandler struct {
	service inprogress_order.InProgressOrderService
}

func NewInProgressOrderHandler(service inprogress_order.InProgressOrderService) *InProgressOrderHandler {
	return &InProgressOrderHandler{
		service: service,
	}
}

func (h *InProgressOrderHandler) Route(group *gin.RouterGroup, jwt gin.HandlerFunc) {
	route := group.Group("/inprogress-order")
	route.POST("/save", jwt, h.Save)
	route.POST("/add", jwt, h.Add)
	route.GET("/list", jwt, h.GetByPartnerID)
}

type CreateInProgressOrderRequest struct {
	CustomerID          *int64                       `json:"customer_id"`
	CustomerName        string                       `json:"customer_name" validate:"required_without=CustomerID"`
	CustomerEmail       string                       `json:"customer_email"`
	CustomerPhoneNumber string                       `json:"customer_phone_number"`
	PaymentMethod       string                       `json:"payment_method"`
	OrderItems          []InProgressOrderItemRequest `json:"order_items" validate:"required,min=1,dive"`
	OrderType           string                       `json:"order_type"`
	PaymentProvider     string                       `json:"payment_provider"`
	TableNumber         string                       `json:"table_number"`
	InProgressOrderID   int64                        `json:"in_progress_order_id"`
}

type AddItemOrderRequest struct {
	OrderItems        []InProgressOrderItemRequest `json:"order_items" validate:"required,min=1,dive"`
	InProgressOrderID int64                        `json:"in_progress_order_id"`
}

type InProgressOrderItemRequest struct {
	ProductID int64 `json:"product_id" validate:"required"`
	Quantity  int   `json:"quantity" validate:"required,min=1"`
}

type UpdateInProgressOrderRequest struct {
	Status      string                       `json:"status" validate:"required"`
	Amount      float64                      `json:"amount" validate:"required,min=0"`
	Fee         float64                      `json:"fee" validate:"min=0"`
	Total       float64                      `json:"total" validate:"required,min=0"`
	PaymentType string                       `json:"payment_type" validate:"required"`
	OrderItems  []InProgressOrderItemRequest `json:"order_items" validate:"required,min=1,dive"`
}

func (h *InProgressOrderHandler) Save(c *gin.Context) {
	ctx := request.GetMyContext(c)
	userID := ctx.RequestedBy()
	partnerID := ctx.GetPartnerID()

	var req CreateInProgressOrderRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.ErrorWrapper(c, errors.ErrorBadRequest)
		return
	}

	validate := validator.New()
	if err := validate.Struct(req); err != nil {
		response.ErrorWrapper(c, err)
		return
	}

	orderItems := make([]entity.OrderItemRequest, len(req.OrderItems))
	for i, item := range req.OrderItems {
		orderItems[i] = entity.OrderItemRequest{
			ProductID: item.ProductID,
			Quantity:  item.Quantity,
		}
	}

	order := &entity.OrderRequest{
		PartnerID:    *partnerID,
		CustomerID:   req.CustomerID,
		CustomerName: req.CustomerName,
		CreatedBy:    userID,
		OrderItems:   orderItems,
		TableNumber:  req.TableNumber,
		OrderType:    req.OrderType,
		ID:           req.InProgressOrderID,
		Source:       "POS",
	}

	_, err := h.service.Save(ctx, order)
	if err != nil {
		response.ErrorWrapper(c, err)
		return
	}

	c.JSON(http.StatusCreated, response.BaseResponse{
		Success: true,
		Status:  http.StatusCreated,
	})
}

func (h *InProgressOrderHandler) Add(c *gin.Context) {
	ctx := request.GetMyContext(c)

	var req AddItemOrderRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		response.ErrorWrapper(c, errors.ErrorBadRequest)
		return
	}

	validate := validator.New()
	if err := validate.Struct(req); err != nil {
		response.ErrorWrapper(c, err)
		return
	}

	orderItems := make([]entity.OrderItemRequest, len(req.OrderItems))
	for i, item := range req.OrderItems {
		orderItems[i] = entity.OrderItemRequest{
			ProductID: item.ProductID,
			Quantity:  item.Quantity,
		}
	}

	_, err := h.service.AddItems(ctx, req.InProgressOrderID, orderItems)
	if err != nil {
		response.ErrorWrapper(c, err)
		return
	}

	c.JSON(http.StatusCreated, response.BaseResponse{
		Success: true,
		Status:  http.StatusCreated,
	})
}

func mapToInProgressOrderResponse(order *entity.Order) map[string]interface{} {
	orderItems := make([]map[string]interface{}, len(order.OrderItems))
	for i, item := range order.OrderItems {
		orderItems[i] = map[string]interface{}{
			"id":       item.ID,
			"item_id":  item.ItemID,
			"quantity": item.Quantity,
			"name":     item.Product.Name,
			"price":    item.Product.Price,
			"image":    item.Product.Image,
		}
	}

	return map[string]interface{}{
		"id":            order.ID,
		"partner_id":    order.PartnerID,
		"customer_id":   order.CustomerID,
		"customer_name": order.CustomerName,
		"payment_type":  order.PaymentType,
		"source":        order.Source,
		"created_by":    order.CreatedBy,
		"created_at":    order.CreatedAt,
		"updated_at":    order.UpdatedAt,
		"order_items":   orderItems,
		"table_number":  order.TableNumber,
	}
}

func (h *InProgressOrderHandler) GetByPartnerID(c *gin.Context) {
	ctx := request.GetMyContext(c)

	limitStr := c.DefaultQuery("limit", "10")
	offsetStr := c.DefaultQuery("offset", "0")

	limit, err := strconv.Atoi(limitStr)
	if err != nil || limit < 0 {
		limit = 10
	}

	offset, err := strconv.Atoi(offsetStr)
	if err != nil || offset < 0 {
		offset = 0
	}

	orders, err := h.service.GetOrdersByPartnerID(ctx, *ctx.GetPartnerID(), limit, offset)
	if err != nil {
		response.ErrorWrapper(c, err)
		return
	}

	orderResponses := make([]map[string]interface{}, len(orders))
	for i, order := range orders {
		orderResponses[i] = mapToInProgressOrderResponse(order)
	}

	c.JSON(http.StatusOK, response.BaseResponse{
		Success: true,
		Status:  http.StatusOK,
		Data: map[string]interface{}{
			"orders": orderResponses,
			"pagination": map[string]interface{}{
				"limit":  limit,
				"offset": offset,
				"count":  len(orders),
			},
		},
	})
}