package main

import (
	"crypto/sha512"
	"encoding/hex"
	"html/template"
	"igar/storage"
	"io"
	"net/http"
	"strings"

	"github.com/google/uuid"
	"github.com/labstack/echo"
	"github.com/labstack/echo/middleware"
	//"github.com/labstack/echo/middleware"
)

type (
	TemplateRenderer struct {
		template *template.Template
	}
)

var (
	list *storage.EntryMap = &storage.EntryMap{
		Filename: "/var/lib/igar/list.json",
	}
)

// FUNCTIONS

func genName() string {
	return strings.Replace(uuid.New().String(), "-", "", -1)
}

// TemplateRenderer

func (renderer *TemplateRenderer) Render(w io.Writer, name string, data interface{}, c echo.Context) error {
	return renderer.template.ExecuteTemplate(w, name, data)
}

func IndexController(c echo.Context) (err error) {
	entries, err := list.GetEntries()
	if err == nil {
		err = c.Render(http.StatusOK, "index.html", entries)
	}
	return
}

func ViewController(c echo.Context) (err error) {
	uuid := c.QueryParam("uuid")
	entry, err := list.GetEntry(uuid)
	if err == nil {
		err = c.Render(http.StatusOK, "view.html", entry)
	}
	if err != nil {
		c.Logger().Error(err)
	}
	return
}

func AdminController(c echo.Context) (err error) {
	entries, err := list.GetEntries()
	if err == nil {
		err = c.Render(http.StatusOK, "admin.html", entries)
	}
	return
}

func PostController(c echo.Context) (err error) {
	desc := c.FormValue("desc")
	date := c.FormValue("date")

	file, err := c.FormFile("file")
	if err != nil {
		return
	}

	entry := storage.NewEntry(desc, date)
	entry.GeneratePostID()
	entry.AddMedia(file)

	list.AddEntry(entry)

	return c.String(http.StatusCreated, "")
}

func DeleteController(c echo.Context) (err error) {
	uuid := c.QueryParam("uuid")
	entry := list.RemoveEntry(uuid)
	entry.RemoveFiles()
	if entry == nil {
		return c.String(http.StatusNotFound, "")
	}
	return c.String(http.StatusOK, "")
}

func auth(username, password string, c echo.Context) (bool, error) {
	adminUsername := "danolo"
	adminPassword := "bd4cad796950f50352225de3c773d8f3c39622bc17f34ad661eabe615cdf6d32751c5751e0648dc17d890f40330018334a2ae899878f200f6dc80121ddb70cc9"
	hash := sha512.Sum512([]byte(password))
	hashString := hex.EncodeToString(hash[:])
	if username == adminUsername && hashString == adminPassword {
		return true, nil
	}
	return false, nil
}

func main() {
	e := echo.New()

	e.Renderer = &TemplateRenderer{
		template: template.Must(template.ParseGlob("templates/*.html")),
	}

	e.GET("/", IndexController)
	e.GET("/view", ViewController)

	//e.GET("/rss", server.RSSController)
	//e.GET("/json", server.JSONController)
	//e.GET("/atom", server.AtomController)

	e.Static("/static", "static")
	e.Static("/img", "/var/lib/igar")

	admin := e.Group("/admin", middleware.BasicAuth(auth))

	admin.GET("/", AdminController)
	admin.POST("/post", PostController)
	admin.DELETE("/post", DeleteController)

	admin.Static("/static", "admin/static")

	e.Logger.Fatal(e.Start(":40404"))
}