package fetchers

import (
	"encoding/json"
	"fmt"
	"llostre/backend/auth"
	"llostre/backend/notes"
	"log/slog"
	"net/http"
)

type ListRecordsResponse struct {
	Records []notes.AppBskyFeedPostRecord `json:"records"`
}

func FetchAppBskyFeedPosts(logger *slog.Logger, did, pdsURL, accessToken string, keypair *auth.DPoPKeyPair, notesCache *Cache) ([]notes.Note, error) {
	url := fmt.Sprintf("%s/xrpc/com.atproto.repo.listRecords?repo=%s&collection=app.bsky.feed.post", pdsURL, did)

	logger.Debug("generating DPoP proof", "url", url)
	dpopProof, err := keypair.GenerateDPoPProof("GET", url, "")
	if err != nil {
		logger.Error("DPoP generation failed", "error", err)
		return nil, err
	}

	logger.Debug("making request to PDS")
	req, err := http.NewRequest("GET", url, nil)
	if err != nil {
		return nil, err
	}
	req.Header.Set("Authorization", "Bearer " + accessToken)
	req.Header.Set("DPoP", dpopProof)

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()

	var response ListRecordsResponse
	if err := json.NewDecoder(resp.Body).Decode(&response); err != nil {
		return nil, err
	}

	profile, err := FetchProfile(did, pdsURL)
	if err != nil {
		logger.Error("profile fetch failed", "did", did, "error", err)
	} else {
		logger.Debug("fetched profile")
	}

	posts := make([]notes.Note, 0, len(response.Records))
	for _, record := range response.Records {
		bp, err := notes.AppBskyFeedPostFromRecord(record, profile)
		if err != nil {
			logger.Error("failed to convert record", "error", err, "uri", record.URI)
			continue
		}
		notesCache.Set(bp.URI, bp)
		posts = append(posts, *bp)
	}

	return posts, nil
}