package chat

import (
	"context"
	"time"

	"github.com/google/uuid"
)

type usageService struct{ repo Repository }

var _ UsageService = (*usageService)(nil)

// NewUsageService 构造 llm_usage 写入与汇总查询服务。
func NewUsageService(repo Repository) UsageService { return &usageService{repo: repo} }

func (s *usageService) Insert(ctx context.Context, in UsageRecord) error {
	return s.repo.InsertUsage(ctx, in)
}

func (s *usageService) SummarizeByUser(ctx context.Context, from, to time.Time) ([]UserUsageRow, error) {
	return s.repo.SummarizeUsageByUser(ctx, from, to)
}

func (s *usageService) SummarizeByModel(ctx context.Context, from, to time.Time) ([]ModelUsageRow, error) {
	return s.repo.SummarizeUsageByModel(ctx, from, to)
}

func (s *usageService) SummarizeByDay(ctx context.Context, from, to time.Time) ([]DayUsageRow, error) {
	return s.repo.SummarizeUsageByDay(ctx, from, to)
}

func (s *usageService) UserDaily(ctx context.Context, userID uuid.UUID, from, to time.Time) ([]DayUsageRow, error) {
	return s.repo.SummarizeUserDaily(ctx, userID, from, to)
}