package telegram

import (
	"context"
	"fmt"

	"github.com/TelegramExchange/tgex-backend/tg_parser/internal/domain"
	"github.com/gotd/td/tg"
)

func (t *Telegram) UpdatePostsViews(ctx context.Context, channel domain.Channel, posts []domain.Post) error {
	ids := make([]int, len(posts))
	for i, p := range posts {
		ids[i] = p.MessageID
	}

	req := &tg.MessagesGetMessagesViewsRequest{
		Peer: &tg.InputPeerChannel{
			ChannelID:  channel.ChannelID(),
			AccessHash: channel.AccessHash,
		},
		ID:        ids,
		Increment: false,
	}

	resp, err := t.API().MessagesGetMessagesViews(ctx, req)
	if err != nil {
		return fmt.Errorf("get messages views: %w", err)
	}

	// Telegram гарантирует, что resp.Views соответствует порядку ids
	for i, v := range resp.Views {
		posts[i].Views = v.Views
	}

	return nil
}