package goscrobble

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

	"github.com/gorilla/mux"
)

type spaHandler struct {
	staticPath string
	indexPath  string
}

// HandleRequests - Boot HTTP server
func HandleRequests() {
	// Creates a new router
	httpRouter := mux.NewRouter().StrictSlash(true)

	httpRouter.HandleFunc("/api/v1", serveEndpoint)
	httpRouter.HandleFunc("/api/v1/scrobble/jellyfin", serveEndpoint)

	spa := spaHandler{staticPath: "web/build", indexPath: "index.html"}
	httpRouter.PathPrefix("/").Handler(spa)

	// fileServer := http.FileServer(http.Dir("web"))
	// fileMatcher := regexp.MustCompile(`\.[a-zA-Z]*$`)
	// http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
	// 	if !fileMatcher.MatchString(r.URL.Path) {
	// 		http.ServeFile(w, r, "web/build/index.html")
	// 	} else {
	// 		fileServer.ServeHTTP(w, r)
	// 	}
	// })

	// Serve HTTP Server
	log.Fatal(http.ListenAndServe(":42069", httpRouter))
}

// serveFrontend - Handle / queries
func serveFrontend(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "Welcome!")
}

func serveEndpoint(w http.ResponseWriter, r *http.Request) {
	fmt.Fprintf(w, "{}")
}

func (h spaHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	// get the absolute path to prevent directory traversal
	path, err := filepath.Abs(r.URL.Path)
	if err != nil {
		// if we failed to get the absolute path respond with a 400 bad request
		// and stop
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	// prepend the path with the path to the static directory
	path = filepath.Join(h.staticPath, path)

	// check whether a file exists at the given path
	_, err = os.Stat(path)
	if os.IsNotExist(err) {
		// file does not exist, serve index.html
		http.ServeFile(w, r, filepath.Join(h.staticPath, h.indexPath))
		return
	} else if err != nil {
		// if we got an error (that wasn't that the file doesn't exist) stating the
		// file, return a 500 internal server error and stop
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	// otherwise, use http.FileServer to serve the static dir
	http.FileServer(http.Dir(h.staticPath)).ServeHTTP(w, r)
}