package usecase

import (
	"context"
	"time"

	"github.com/rs/zerolog/log"

	"github.com/TelegramExchange/tgex-parser/internal/domain"
)

func (uc *UseCase) FetchViews(ctx context.Context) error {
	channels, err := uc.database.GetChannelsWithTrackedPosts(ctx)
	if err != nil {
		return err
	}

	for _, channel := range channels {
		posts, err := uc.database.GetTrackedPosts(ctx, channel)
		if err != nil {
			return err
		}

		err = uc.telegram.UpdatePostsViews(ctx, channel, posts)
		if err != nil {
			return err
		}

		for _, p := range posts {
			v := domain.ViewsSnapshot{
				ViewsCount: p.Views,
				FetchedAt:  time.Now().UTC(),
				PostID:     p.ID,
			}

			err = uc.database.CreateViewsSnapshot(ctx, v)
			if err != nil {
				return err
			}

			log.Info().Msgf("New ViewsSnapshot: %s - Post ID: %d, Views: %d", p.Link, p.MessageID, p.Views)
		}
	}

	return nil
}