package analytics

import (
	"context"
	biz "kra/internal/biz/analytics"
	"kra/internal/service/dto"
	"time"
)

type Service struct{ uc *biz.Usecase }

func NewService(uc *biz.Usecase) *Service { return &Service{uc: uc} }
func (s *Service) Get(ctx context.Context, days int) (*dto.DashboardResponse, error) {
	if days != 0 && days != 1 && days != 7 && days != 30 {
		days = 1
	}
	now := time.Now()
	today := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
	from, to := today.AddDate(0, 0, -days+1), now
	if days == 0 {
		from = today.AddDate(0, 0, -1)
		to = today.Add(-time.Nanosecond)
	}
	v, e := s.uc.Get(ctx, from, to)
	if e != nil {
		return nil, e
	}
	out := &dto.DashboardResponse{RoomTotal: v.RoomTotal, RoomLive: v.RoomLive, RechargeCents: v.RechargeCents, PaidOrderCount: v.PaidOrderCount, GiftDiamonds: v.GiftDiamonds, GiftSendCount: v.GiftSendCount, DiamondRateCents: v.DiamondRateCents}
	for _, x := range v.RechargeTrend {
		out.RechargeTrend = append(out.RechargeTrend, dto.DashboardTrend{Date: x.Date, AmountCents: x.AmountCents})
	}
	for _, x := range v.GiftRanking {
		out.GiftRanking = append(out.GiftRanking, dto.DashboardRank{RoomID: x.RoomID, RoomName: x.RoomName, AnchorName: x.AnchorName, Diamonds: x.Diamonds})
	}
	return out, nil
}