package service

import (
	"context"
	"fmt"
	"time"

	"go.uber.org/zap"

	"github.com/topfans/backend/pkg/logger"
	pb "github.com/topfans/backend/pkg/proto/statistic"
	"github.com/topfans/backend/services/statisticService/repository"
)

// UserRPCClient 跨服务调用 userService 的接口
type UserRPCClient interface {
	GetCrystalBalance(ctx context.Context, userID, starID int64) (int64, error)
}

// DashboardService 看板 7 RPC 业务逻辑
type DashboardService struct {
	repo    *repository.DashboardRepository
	cache   *Cache
	userRPC UserRPCClient
}

// NewDashboardService 构造
func NewDashboardService(repo *repository.DashboardRepository, cache *Cache, userRPC UserRPCClient) *DashboardService {
	return &DashboardService{repo: repo, cache: cache, userRPC: userRPC}
}

// ===== 1. 今日概览 =====
func (s *DashboardService) GetTodayOverview(ctx context.Context, userID, starID int64) (*pb.GetTodayOverviewResponse, error) {
	key := CacheKey("today_overview", starID, userID)
	var cached pb.GetTodayOverviewResponse
	if ok, _ := s.cache.GetJSON(ctx, key, &cached); ok {
		return &cached, nil
	}

	part, err := s.repo.GetWeekRank(ctx, userID, starID)
	if err != nil {
		return nil, err
	}
	todayIncome, err := s.repo.GetTodayIncome(ctx, userID, starID)
	if err != nil {
		return nil, err
	}
	var crystal int64
	if s.userRPC != nil {
		if c, err := s.userRPC.GetCrystalBalance(ctx, userID, starID); err == nil {
			crystal = c
		} else {
			logger.Logger.Warn("userService.GetCrystalBalance failed, use 0", zap.Error(err))
		}
	}
	resp := &pb.GetTodayOverviewResponse{
		CrystalBalance: crystal,
		TodayIncome:    todayIncome,
		WeekRank:       part.WeekRank,
		WeekTotalUsers: part.WeekTotalUsers,
	}
	_ = s.cache.SetJSON(ctx, key, resp)
	return resp, nil
}

// ===== 2. 七日收益曲线 =====
func (s *DashboardService) Get7DayIncomeCurve(ctx context.Context, userID, starID int64) (*pb.Get7DayIncomeCurveResponse, error) {
	key := CacheKey("7day_income_curve", starID, userID)
	var cached pb.Get7DayIncomeCurveResponse
	if ok, _ := s.cache.GetJSON(ctx, key, &cached); ok {
		return &cached, nil
	}
	points, total, err := s.repo.Get7DayIncomeCurve(ctx, userID, starID)
	if err != nil {
		return nil, err
	}
	resp := &pb.Get7DayIncomeCurveResponse{
		TotalIncome: total,
		AvgIncome:   avgInt64(total, 7),
	}
	for _, p := range points {
		resp.Points = append(resp.Points, &pb.DailyIncomePoint{
			Date: p.Date, Income: p.Income, IsToday: p.IsToday, IsPeak: p.IsPeak,
		})
	}
	_ = s.cache.SetJSON(ctx, key, resp)
	return resp, nil
}

// ===== 3. 展出收益中心 =====
func (s *DashboardService) GetExhibitionIncomeSummary(ctx context.Context, userID, starID int64) (*pb.GetExhibitionIncomeSummaryResponse, error) {
	key := CacheKey("exhibition_summary", starID, userID)
	var cached pb.GetExhibitionIncomeSummaryResponse
	if ok, _ := s.cache.GetJSON(ctx, key, &cached); ok {
		return &cached, nil
	}
	sum, err := s.repo.GetExhibitionIncomeSummary(ctx, userID, starID)
	if err != nil {
		return nil, err
	}
	resp := &pb.GetExhibitionIncomeSummaryResponse{
		ExhibitingCount: sum.ExhibitingCount,
		StarbookCount:   sum.StarbookCount,
		TotalDuration:   sum.TotalDuration,
		TotalEarnings:   sum.TotalEarnings,
	}
	for _, t := range sum.Top5 {
		resp.Top5 = append(resp.Top5, &pb.TopExhibitionItem{
			AssetId: t.AssetID, AssetName: t.AssetName, AssetThumb: t.AssetThumb,
			Duration_7D: t.Duration7d, Earnings_7D: t.Earnings7d, AvgEarnings: t.AvgEarnings,
		})
	}
	_ = s.cache.SetJSON(ctx, key, resp)
	return resp, nil
}

// ===== 4. 点赞按等级 =====
func (s *DashboardService) GetLikeIncomeByLevel(ctx context.Context, userID, starID int64) (*pb.GetLikeIncomeByLevelResponse, error) {
	key := CacheKey("like_income_by_level", starID, userID)
	var cached pb.GetLikeIncomeByLevelResponse
	if ok, _ := s.cache.GetJSON(ctx, key, &cached); ok {
		return &cached, nil
	}
	levels, totalCount, totalIncome, err := s.repo.GetLikeIncomeByLevel(ctx, userID, starID)
	if err != nil {
		return nil, err
	}
	resp := &pb.GetLikeIncomeByLevelResponse{
		TotalLikeCount: totalCount,
		TotalIncome:    totalIncome,
	}
	for _, l := range levels {
		resp.Levels = append(resp.Levels, &pb.LikeIncomeLevelItem{
			Level: l.Level, AssetCount: l.AssetCount, TotalIncome: l.Income, Thumb: l.Thumb,
		})
	}
	_ = s.cache.SetJSON(ctx, key, resp)
	return resp, nil
}

// ===== 5. 藏品 TOP5 =====
func (s *DashboardService) GetTopAssetsByEarning(ctx context.Context, userID, starID int64) (*pb.GetTopAssetsByEarningResponse, error) {
	key := CacheKey("top_assets", starID, userID)
	var cached pb.GetTopAssetsByEarningResponse
	if ok, _ := s.cache.GetJSON(ctx, key, &cached); ok {
		return &cached, nil
	}
	rows, err := s.repo.GetTopAssetsByEarning(ctx, userID, starID)
	if err != nil {
		return nil, err
	}
	resp := &pb.GetTopAssetsByEarningResponse{}
	for _, t := range rows {
		resp.Items = append(resp.Items, &pb.TopAssetItem{
			AssetId: t.AssetID, AssetName: t.AssetName, AssetThumb: t.AssetThumb,
			TotalEarnings: t.TotalEarnings, Rank: t.Rank,
		})
	}
	_ = s.cache.SetJSON(ctx, key, resp)
	return resp, nil
}

// ===== 6. 等级分布 =====
func (s *DashboardService) GetAssetLevelDistribution(ctx context.Context, userID, starID int64) (*pb.GetAssetLevelDistributionResponse, error) {
	key := CacheKey("level_distribution", starID, userID)
	var cached pb.GetAssetLevelDistributionResponse
	if ok, _ := s.cache.GetJSON(ctx, key, &cached); ok {
		return &cached, nil
	}
	items, err := s.repo.GetAssetLevelDistribution(ctx, userID, starID)
	if err != nil {
		return nil, err
	}
	resp := &pb.GetAssetLevelDistributionResponse{}
	for _, i := range items {
		resp.Items = append(resp.Items, &pb.AssetLevelItem{
			Level: i.Level, Count: i.Count, Total: i.Total,
		})
	}
	_ = s.cache.SetJSON(ctx, key, resp)
	return resp, nil
}

// ===== 7. 升级进度 =====
func (s *DashboardService) GetAssetUpgradeProgress(ctx context.Context, userID, starID int64) (*pb.GetAssetUpgradeProgressResponse, error) {
	key := CacheKey("upgrade_progress", starID, userID)
	var cached pb.GetAssetUpgradeProgressResponse
	if ok, _ := s.cache.GetJSON(ctx, key, &cached); ok {
		return &cached, nil
	}
	upcoming, recent, err := s.repo.GetAssetUpgradeProgress(ctx, userID, starID)
	if err != nil {
		return nil, err
	}
	resp := &pb.GetAssetUpgradeProgressResponse{}
	for _, u := range upcoming {
		resp.Upcoming = append(resp.Upcoming, &pb.UpcomingLevelUpItem{
			AssetId: u.AssetID, AssetName: u.AssetName, AssetThumb: u.AssetThumb,
			LikeProgress: u.LikeProgress, DurationProgress: u.DurationProgress,
		})
	}
	for _, r := range recent {
		resp.Recent = append(resp.Recent, &pb.RecentLevelUpItem{
			AssetId: r.AssetID, AssetName: r.AssetName, AssetThumb: r.AssetThumb,
			NewLevel: r.NewLevel, UpgradeTime: r.UpgradeTime,
		})
	}
	_ = s.cache.SetJSON(ctx, key, resp)
	return resp, nil
}

// helper
func avgInt64(total int64, n int) int64 {
	if n == 0 {
		return 0
	}
	return total / int64(n)
}

// sentinel
var _ = fmt.Sprintf
var _ = time.Second