package router

import (
	"encoding/json"
	"fmt"
	"net/http"

	"github.com/debridmediamanager/zurg/internal/config"
	"github.com/debridmediamanager/zurg/internal/dav"
	intHttp "github.com/debridmediamanager/zurg/internal/http"
	"github.com/debridmediamanager/zurg/internal/torrent"
	"github.com/debridmediamanager/zurg/internal/universal"
	"github.com/debridmediamanager/zurg/internal/version"
	"github.com/debridmediamanager/zurg/pkg/realdebrid"
	"github.com/julienschmidt/httprouter"
	"go.uber.org/zap"
)

type ZurgRouter struct {
	getfile *universal.GetFile
	torMgr  *torrent.TorrentManager
	cfg     config.ConfigInterface
	api     *realdebrid.RealDebrid
	log     *zap.SugaredLogger
}

func ApplyRouteTable(router *httprouter.Router, getfile *universal.GetFile, torMgr *torrent.TorrentManager, cfg config.ConfigInterface, api *realdebrid.RealDebrid, log *zap.SugaredLogger) {
	zr := &ZurgRouter{
		getfile: getfile,
		torMgr:  torMgr,
		cfg:     cfg,
		api:     api,
		log:     log,
	}

	// http router
	router.GET("/http/:directory/:torrent/:file", zr.universalDownloadFileHandler)
	router.GET("/http/:directory/:torrent/", zr.httpTorrentDirectoryHandler)
	router.GET("/http/:directory/", zr.httpDirectoryHandler)
	router.GET("/http/", zr.httpRootHandler)
	// HEAD route
	router.HEAD("/http/:directory/:torrent/:file", zr.headFileHandler)

	// dav router
	router.GET("/dav/:directory/:torrent/:file", zr.universalDownloadFileHandler)
	router.GET("/dav/:directory/:torrent/", zr.propfindTorrentHandler)
	router.GET("/dav/:directory/", zr.propfindDirectoryHandler)
	router.GET("/dav/", zr.propfindRootHandler)
	// PROPFIND routes
	router.Handle("PROPFIND", "/dav/:directory/:torrent/", zr.propfindTorrentHandler)
	router.Handle("PROPFIND", "/dav/:directory/", zr.propfindDirectoryHandler)
	router.Handle("PROPFIND", "/dav/", zr.propfindRootHandler)
	// DELETE routes
	router.DELETE("/dav/:directory/:torrent/:file", zr.deleteFileHandler)
	router.DELETE("/dav/:directory/:torrent/", zr.deleteTorrentHandler)

	// Global OPTIONS route
	router.GlobalOPTIONS = http.HandlerFunc(zr.globalOptionsHandler)

	// root route
	router.GET("/", zr.rootHandler)
}

func (zr *ZurgRouter) httpTorrentDirectoryHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	directory := params.ByName("directory")
	torrentName := params.ByName("torrent")
	out, err := intHttp.HandleListFiles(directory, torrentName, zr.torMgr, zr.log)
	if err != nil {
		http.Error(resp, "Not Found", http.StatusNotFound)
		return
	}
	resp.Header().Set("Content-Type", "text/html; charset=\"utf-8\"")
	resp.WriteHeader(http.StatusOK)
	fmt.Fprint(resp, *out)
}

func (zr *ZurgRouter) httpDirectoryHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	directory := params.ByName("directory")
	out, err := intHttp.HandleListTorrents(directory, zr.torMgr, zr.log)
	if err != nil {
		http.Error(resp, "Not Found", http.StatusNotFound)
		return
	}
	resp.Header().Set("Content-Type", "text/html; charset=\"utf-8\"")
	resp.WriteHeader(http.StatusOK)
	fmt.Fprint(resp, *out)
}

func (zr *ZurgRouter) httpRootHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	out, err := intHttp.HandleListDirectories(zr.torMgr)
	if err != nil {
		http.Error(resp, "Not Found", http.StatusNotFound)
		return
	}
	resp.Header().Set("Content-Type", "text/html; charset=\"utf-8\"")
	resp.WriteHeader(http.StatusOK)
	fmt.Fprint(resp, *out)
}

func (zr *ZurgRouter) propfindTorrentHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	directory := params.ByName("directory")
	torrentName := params.ByName("torrent")
	out, err := dav.HandleListFiles(directory, torrentName, zr.torMgr, zr.log)
	if err != nil {
		http.Error(resp, "Not Found", http.StatusNotFound)
		return
	}
	resp.Header().Set("Content-Type", "text/xml; charset=\"utf-8\"")
	resp.WriteHeader(http.StatusOK)
	fmt.Fprint(resp, *out)
}

func (zr *ZurgRouter) propfindDirectoryHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	directory := params.ByName("directory")
	out, err := dav.HandleListTorrents(directory, zr.torMgr, zr.log)
	if err != nil {
		http.Error(resp, "Not Found", http.StatusNotFound)
		return
	}
	resp.Header().Set("Content-Type", "text/xml; charset=\"utf-8\"")
	resp.WriteHeader(http.StatusOK)
	fmt.Fprint(resp, *out)
}

func (zr *ZurgRouter) propfindRootHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	out, err := dav.HandleListDirectories(zr.torMgr)
	if err != nil {
		http.Error(resp, "Not Found", http.StatusNotFound)
		return
	}
	resp.Header().Set("Content-Type", "text/xml; charset=\"utf-8\"")
	resp.WriteHeader(http.StatusOK)
	fmt.Fprint(resp, *out)
}

func (zr *ZurgRouter) deleteFileHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	directory := params.ByName("directory")
	torrentName := params.ByName("torrent")
	fileName := params.ByName("file")
	if dav.HandleDeleteFile(directory, torrentName, fileName, zr.torMgr) != nil {
		http.Error(resp, "Not Found", http.StatusNotFound)
		return
	}
	resp.WriteHeader(http.StatusNoContent)
}

func (zr *ZurgRouter) deleteTorrentHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	directory := params.ByName("directory")
	torrentName := params.ByName("torrent")
	if dav.HandleDeleteTorrent(directory, torrentName, zr.torMgr) != nil {
		http.Error(resp, "Not Found", http.StatusNotFound)
		return
	}
	resp.WriteHeader(http.StatusNoContent)
}

func (zr *ZurgRouter) globalOptionsHandler(resp http.ResponseWriter, req *http.Request) {
	resp.WriteHeader(http.StatusOK)
}

func (zr *ZurgRouter) universalDownloadFileHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	directory := params.ByName("directory")
	torrentName := params.ByName("torrent")
	fileName := params.ByName("file")
	zr.getfile.HandleGetRequest(directory, torrentName, fileName, resp, req, zr.torMgr, zr.cfg, zr.log)
}

func (zr *ZurgRouter) headFileHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	directory := params.ByName("directory")
	torrentName := params.ByName("torrent")
	fileName := params.ByName("file")
	universal.HandleHeadRequest(directory, torrentName, fileName, resp, req, zr.torMgr, zr.log)
}

// Create a struct to hold the data
type RootResponse struct {
	Version   string           `json:"zurg"`
	BuiltAt   string           `json:"built_at"`
	GitCommit string           `json:"git_commit"`
	GoVersion string           `json:"go_version"`
	Dav       string           `json:"dav"`
	Html      string           `json:"html"`
	UserInfo  *realdebrid.User `json:"user_info"`
}

func (zr *ZurgRouter) rootHandler(resp http.ResponseWriter, req *http.Request, params httprouter.Params) {
	userInfo, err := zr.api.GetUserInformation()
	if err != nil {
		// Handle the error appropriately
		http.Error(resp, err.Error(), http.StatusInternalServerError)
		return
	}
	response := RootResponse{
		Version:   version.GetVersion(),
		BuiltAt:   version.GetBuiltAt(),
		GitCommit: version.GetGitCommit(),
		GoVersion: version.GetGoVersion(),
		Dav:       fmt.Sprintf("//%s/dav/", req.Host),
		Html:      fmt.Sprintf("//%s/http/", req.Host),
		UserInfo:  userInfo,
	}

	if err := json.NewEncoder(resp).Encode(response); err != nil {
		http.Error(resp, err.Error(), http.StatusInternalServerError)
	}
}