package http

import (
	"enaklo-pos-be/internal/entity"
	"enaklo-pos-be/internal/handlers/request"
	"enaklo-pos-be/internal/handlers/response"
	"enaklo-pos-be/internal/services/v2/undian"
	"github.com/gin-gonic/gin"
	"net/http"
	"time"
)

type CustomerUndianHandler struct {
	undianService undian.Service
}

func NewCustomerUndianHandler(undianService undian.Service) *CustomerUndianHandler {
	return &CustomerUndianHandler{
		undianService: undianService,
	}
}

func (h *CustomerUndianHandler) Route(group *gin.RouterGroup, jwt gin.HandlerFunc) {
	route := group.Group("/undian")

	route.GET("/list", jwt, h.GetUndianList)
	route.GET("/events", jwt, h.GetActiveEvents)
}

func (h *CustomerUndianHandler) GetUndianList(c *gin.Context) {
	ctx := request.GetMyContext(c)
	userID := ctx.RequestedBy()

	undianResponse, err := h.undianService.GetUndianList(ctx, userID)
	if err != nil {
		response.ErrorWrapper(c, err)
		return
	}

	responseData := h.mapToUndianListResponse(undianResponse)

	c.JSON(http.StatusOK, response.BaseResponse{
		Success: true,
		Status:  http.StatusOK,
		Data:    responseData,
	})
}

func (h *CustomerUndianHandler) GetActiveEvents(c *gin.Context) {
	ctx := request.GetMyContext(c)

	events, err := h.undianService.GetActiveUndianEvents(ctx)
	if err != nil {
		response.ErrorWrapper(c, err)
		return
	}

	responseData := h.mapToActiveEventsResponse(events)

	c.JSON(http.StatusOK, response.BaseResponse{
		Success: true,
		Status:  http.StatusOK,
		Data:    responseData,
	})
}

func (h *CustomerUndianHandler) mapToUndianListResponse(undianResponse *entity.UndianListResponse) response.UndianListResponse {
	events := make([]response.UndianEventResponse, 0, len(undianResponse.Events))

	for _, event := range undianResponse.Events {
		vouchers := make([]response.UndianVoucherResponse, 0, len(event.Vouchers))
		for _, voucher := range event.Vouchers {
			vouchers = append(vouchers, response.UndianVoucherResponse{
				ID:            voucher.ID,
				VoucherCode:   voucher.VoucherCode,
				VoucherNumber: voucher.VoucherNumber,
				IsWinner:      voucher.IsWinner,
				PrizeRank:     voucher.PrizeRank,
				WonAt:         h.formatTimePointer(voucher.WonAt),
				CreatedAt:     voucher.CreatedAt.Format("2006-01-02T15:04:05Z"),
			})
		}

		prizes := make([]response.UndianPrizeResponse, 0, len(event.Prizes))
		for _, prize := range event.Prizes {
			prizes = append(prizes, response.UndianPrizeResponse{
				ID:               prize.ID,
				Rank:             prize.Rank,
				PrizeName:        prize.PrizeName,
				PrizeValue:       prize.PrizeValue,
				PrizeDescription: prize.PrizeDescription,
				PrizeType:        prize.PrizeType,
				PrizeImageURL:    prize.PrizeImageURL,
				WinningVoucherID: prize.WinningVoucherID,
				WinnerUserID:     prize.WinnerUserID,
				IsWon:            prize.WinningVoucherID != nil,
				Amount:           prize.Amount,
			})
		}

		events = append(events, response.UndianEventResponse{
			ID:              event.ID,
			Title:           event.Title,
			Description:     event.Description,
			ImageURL:        event.ImageURL,
			Status:          event.Status,
			StartDate:       event.StartDate.Format("2006-01-02T15:04:05Z"),
			EndDate:         event.EndDate.Format("2006-01-02T15:04:05Z"),
			DrawDate:        event.DrawDate.Format("2006-01-02T15:04:05Z"),
			MinimumPurchase: event.MinimumPurchase,
			DrawCompleted:   event.DrawCompleted,
			DrawCompletedAt: h.formatTimePointer(event.DrawCompletedAt),
			TermsConditions: event.TermsConditions,
			Prefix:          event.Prefix,
			CreatedAt:       event.CreatedAt.Format("2006-01-02T15:04:05Z"),
			UpdatedAt:       event.UpdatedAt.Format("2006-01-02T15:04:05Z"),
			VoucherCount:    event.VoucherCount,
			Vouchers:        vouchers,
			Prizes:          prizes,
			TotalPrizes:     len(prizes),
		})
	}

	return response.UndianListResponse{
		Events: events,
	}
}

func (h *CustomerUndianHandler) mapToActiveEventsResponse(events []*entity.UndianEventDB) response.ActiveEventsResponse {
	eventResponses := make([]response.ActiveEventResponse, 0, len(events))

	for _, event := range events {
		eventResponses = append(eventResponses, response.ActiveEventResponse{
			ID:              event.ID,
			Title:           event.Title,
			Description:     event.Description,
			ImageURL:        event.ImageURL,
			Status:          event.Status,
			StartDate:       event.StartDate.Format("2006-01-02T15:04:05Z"),
			EndDate:         event.EndDate.Format("2006-01-02T15:04:05Z"),
			DrawDate:        event.DrawDate.Format("2006-01-02T15:04:05Z"),
			MinimumPurchase: event.MinimumPurchase,
			DrawCompleted:   event.DrawCompleted,
			DrawCompletedAt: h.formatTimePointer(event.DrawCompletedAt),
			TermsConditions: event.TermsAndConditions,
			Prefix:          event.Prefix,
			CreatedAt:       event.CreatedAt.Format("2006-01-02T15:04:05Z"),
			UpdatedAt:       event.UpdatedAt.Format("2006-01-02T15:04:05Z"),
		})
	}

	return response.ActiveEventsResponse{
		Events: eventResponses,
	}
}

// formatTimePointer formats time pointer to string
func (h *CustomerUndianHandler) formatTimePointer(t *time.Time) *string {
	if t == nil {
		return nil
	}
	formatted := t.Format("2006-01-02T15:04:05Z")
	return &formatted
}