package handlers

import (
	"dwelling-files/internal/server"
	"dwelling-files/pkg/files"
	"dwelling-files/pkg/utils"
	"dwelling-files/web"
	"log"
	"net/http"
	"strings"

	"github.com/julienschmidt/httprouter"
)

type FilesHandlers struct {
	directoryPath  string
	assetsServer   http.Handler
	fileServer     http.Handler
	noFileHandling bool
}

func New(directoryPath *string, assetsFS http.FileSystem, noFileHandling bool) *FilesHandlers {
	var fSrv http.Handler
	if noFileHandling {
		fSrv = nil
	} else {
		fSrv = http.FileServer(http.Dir(*directoryPath))
	}
	return &FilesHandlers{
		directoryPath:  *directoryPath,
		assetsServer:   http.FileServer(assetsFS),
		fileServer:     fSrv,
		noFileHandling: noFileHandling}
}

func (FilesHandlers) AssetsFS() http.FileSystem {
	return web.Assets()
}

func (h *FilesHandlers) Index(w http.ResponseWriter, r *http.Request) {
	path := httprouter.CleanPath(server.GetURLParam(r, "filepath"))

	if strings.HasPrefix(path, "/assets") {
		h.assetsServer.ServeHTTP(w, r)
		return
	}

	if strings.HasPrefix(path, "/robots.txt") {
		fc, _ := web.AssetsGetFile("robots.txt")
		w.Write(fc)
		return
	}

	if strings.HasPrefix(path, "/file") {
		if h.noFileHandling {
			w.WriteHeader(http.StatusServiceUnavailable)
			return
		}
		r.URL.Path = path[5:]
		h.fileServer.ServeHTTP(w, r)
		return
	}

	currentPath := files.CurrentPath(path)

	entries, stats, err := files.ScanDirectory(h.directoryPath+path, path)
	if err != nil {
		log.Println(err)
		return
	}

	web.Index(utils.MainSite(r.Host), currentPath, &stats, &entries, r, w)
}