package main

import (
	"encoding/json"
	"html/template"
	"log"
	"net/http"
	"os"
	"strings"

	"meutel.net/meutel/go-examples/photoblog/admin"
	"meutel.net/meutel/go-examples/photoblog/photo"

	"github.com/gorilla/sessions"
)

type PhotoBlogConfig struct {
	SessionSecret  string `json:"session-secret"`
	PasswordSecret string `json:"password-secret"`
	DataDir        string `json:"data-dir"`
}

func ReadConfig(file *os.File) (*PhotoBlogConfig, error) {
	conf := new(PhotoBlogConfig)
	err := json.NewDecoder(file).Decode(conf)
	return conf, err
}

func main() {
	// load config
	confPath := "photoblog.json"
	if len(os.Args) > 1 {
		confPath = os.Args[1]
	}
	confFile, err := os.Open(confPath)
	if err != nil {
		log.Fatalln("Invalid conf file", err)
	}
	defer confFile.Close()
	conf, err := ReadConfig(confFile)
	if err != nil {
		log.Fatalln("Configuration error", err)
	}
	dataInfo, err := os.Stat(conf.DataDir)
	if !dataInfo.IsDir() {
		log.Fatalln("Invalid data directory")
	}
	data, err := os.Open(conf.DataDir)
	if err != nil {
		log.Fatalln("cannot open data directory", err)
	}
	defer data.Close()

	// load templates
	tpl, err := template.ParseGlob("templates/*.html")
	if err != nil {
		log.Fatalln(err)
	}

	app := photo.PhotoBlog{
		admin.AuthCookie{
			Templates:      tpl,
			Store:          sessions.NewCookieStore([]byte(conf.SessionSecret)),
			DataDir:        data,
			PasswordSecret: conf.PasswordSecret,
		},
	}

	http.HandleFunc("/", func(res http.ResponseWriter, req *http.Request) {
		if strings.HasPrefix(req.RequestURI, photo.DATA) {
			http.StripPrefix(photo.DATA, http.FileServer(http.Dir(data.Name()))).ServeHTTP(res, req)
		} else {
			app.HomePage(res, req)
		}
	})
	http.HandleFunc("/upload", app.UploadPage)
	http.HandleFunc("/login", app.LoginPage)
	http.HandleFunc("/logout", app.LogoutPage)
	http.ListenAndServeTLS(":9443", "../cert.pem", "../key.pem", nil)
}