package server

import (
	"io/fs"
	"net/http"
	"strings"
	"sync"

	"github.com/go-chi/chi/v5"
	"gitlab.com/wpetit/goweb/api"

	_ "embed"
)

type App struct {
	ID          string            `json:"id"`
	Title       map[string]string `json:"title"`
	Description map[string]string `json:"description"`
	Icon        string            `json:"icon"`
	FS          fs.FS             `json:"-"`
	Hidden      bool              `json:"hidden"`
}

func (s *Server) handleDefaultApp(w http.ResponseWriter, r *http.Request) {
	http.Redirect(w, r, "/apps/"+s.defaultApp+"/", http.StatusTemporaryRedirect)
}

func (s *Server) handleApps(w http.ResponseWriter, r *http.Request) {
	api.DataResponse(w, http.StatusOK, struct {
		DefaultApp string `json:"defaultApp"`
		Apps       []App  `json:"apps"`
	}{
		DefaultApp: s.defaultApp,
		Apps:       s.apps,
	})
}

var (
	indexedAppFilesystems map[string]fs.FS
	indexAppsOnce         sync.Once
)

func (s *Server) handleAppFilesystem(w http.ResponseWriter, r *http.Request) {
	indexAppsOnce.Do(func() {
		indexedAppFilesystems = make(map[string]fs.FS, len(s.apps))
		for _, app := range s.apps {
			indexedAppFilesystems[app.ID] = app.FS
		}
	})

	appID := chi.URLParam(r, "appID")

	fs, exists := indexedAppFilesystems[appID]
	if !exists {
		http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)

		return
	}

	name := strings.TrimPrefix(r.URL.Path, "/apps/"+appID)

	http.ServeFileFS(w, r, fs, name)
}