package dav

import (
	"fmt"
	"log"
	"net/http"
	"os"
	"path"
	"path/filepath"
	"strings"

	"github.com/debridmediamanager.com/zurg/internal/torrent"
	"github.com/debridmediamanager.com/zurg/pkg/davextra"
	"github.com/debridmediamanager.com/zurg/pkg/realdebrid"
)

// HandleGetRequest handles a GET request to a file
func HandleGetRequest(w http.ResponseWriter, r *http.Request, t *torrent.TorrentManager) {
	requestPath := path.Clean(r.URL.Path)

	segments := strings.Split(requestPath, "/")
	// If there are less than 3 segments, return an error or adjust as needed
	if len(segments) < 3 {
		log.Println("Invalid url", requestPath)
		// http.Error(w, "Cannot find file", http.StatusNotFound)
		handleSingleTorrent(requestPath, w, r, t)
		return
	}

	// Get the last two segments
	baseDirectory := segments[len(segments)-3]
	torrentName := segments[len(segments)-2]
	filename := segments[len(segments)-1]

	torrents := findAllTorrentsWithName(t, baseDirectory, torrentName)
	if torrents == nil {
		log.Println("Cannot find torrent", torrentName)
		http.Error(w, "Cannot find file", http.StatusNotFound)
		return
	}

	filenameV2, linkFragment := davextra.ExtractLinkFragment(filename)
	link := getLink(torrents, filenameV2, linkFragment)
	if link == "" {
		log.Println("Link not found", filename)
		http.Error(w, "Cannot find file", http.StatusNotFound)
		return
	}

	unrestrictFn := func() (*realdebrid.UnrestrictResponse, error) {
		return realdebrid.UnrestrictLink(os.Getenv("RD_TOKEN"), link)
	}
	resp := realdebrid.RetryUntilOk(unrestrictFn)
	if resp == nil {
		// TODO: Readd the file
		// when unrestricting fails, it means the file is not available anymore, but still in their database
		// if it's the only file, tough luck
		log.Println("Cannot unrestrict link", link, filenameV2)
		http.Error(w, "Cannot find file", http.StatusNotFound)
		return
	}
	if resp.Filename != filenameV2 {
		// TODO: Redo the logic to handle mismatch
		// [SRS] Pokemon S22E01-35 1080p WEBRip AAC 2.0 x264 CC.rar
		// Pokemon.S22E24.The.Secret.Princess.DUBBED.1080p.WEBRip.AAC.2.0.x264-SRS.mkv
		// Action: schedule a "cleanup" job for the parent torrent
		// If the file extension changed, that means it's a different file
		log.Println("Filename mismatch", resp.Filename, filenameV2)
	}
	http.Redirect(w, r, resp.Download, http.StatusFound)
}

// getLink finds a link by a fragment, it might be wrong
func getLink(torrents []torrent.Torrent, filename, fragment string) string {
	for _, torrent := range torrents {
		for _, file := range torrent.SelectedFiles {
			fname := filepath.Base(file.Path)
			if filename == fname && strings.HasPrefix(file.Link, fmt.Sprintf("https://real-debrid.com/d/%s", fragment)) {
				return file.Link
			}
		}
	}
	return ""
}