//go:generate go run assets/generate.go
package main

import (
	"database/sql"
	"io"
	"log"
	"net/http"
	"os"
	"path"

	"git.wicak.co/arif/photlog/assets/static"
	"git.wicak.co/arif/photlog/assets/template"
	"git.wicak.co/arif/photlog/models"

	_ "github.com/mattn/go-sqlite3"
	"github.com/shurcooL/httpfs/html/vfstemplate"
)

// Env contains the app configuration
type Env struct {
	dataSource string
	db         *sql.DB
}

func init() {
	env := Env{"/data/data.sqlite3", nil}

	_, err := os.Stat("./data")
	if err != nil {
		os.MkdirAll("./data", os.ModePerm)

		env.db, err = models.InitDB("/data/data.sqlite3")
		if err != nil {
			log.Fatalln(err)
		}
		defer env.db.Close()

		if _, err = env.db.Exec("CREATE TABLE IF NOT EXISTS data (uuid text not null primary key, title text not null, subtitle text not null, description text not null, media text not null);"); err != nil {
			log.Fatalln(err)
		}

		uuid, title, subtitle, description, media := "df1852e4-4eb2-4227-acac-e1e743bb6189", "This is title", "This is subtitle", "This is description", "test.jpg"
		if _, err = env.db.Exec("CREATE TABLE IF NOT EXISTS data (uuid text not null primary key, title text not null, subtitle text not null, description text not null, media text not null);"); err != nil {
			log.Fatalln(err)
		}

		_, err = env.db.Exec("INSERT INTO data VALUES ($1, $2, $3, $4, $5) ON CONFLICT DO NOTHING;", uuid, title, subtitle, description, media)
		if err != nil {
			log.Println(err)
		}
	}
}

func (env *Env) indexHandler(w http.ResponseWriter, r *http.Request) {
	tmpl, err := vfstemplate.ParseFiles(template.Template, nil, "/index.html")
	if err != nil {
		log.Println(err)
		http.Error(w, http.StatusText(500), 500)
		return
	}

	uuid := "df1852e4-4eb2-4227-acac-e1e743bb6189"
	post, err := models.GetPost(env.db, uuid)
	if err != nil {
		log.Println(err)
		http.Error(w, http.StatusText(500), 500)
		return
	}

	err = tmpl.Execute(w, post)
	if err != nil {
		log.Println(err)
		http.Error(w, http.StatusText(500), 500)
		return
	}
}

func (env *Env) postHandler(w http.ResponseWriter, r *http.Request) {
	if r.Method != "POST" {
		tmpl, err := vfstemplate.ParseFiles(template.Template, nil, "/post.html")
		if err != nil {
			http.Error(w, http.StatusText(500), 500)
			return
		}

		uuid := "df1852e4-4eb2-4227-acac-e1e743bb6189"
		post, err := models.GetPost(env.db, uuid)
		if err != nil {
			http.Error(w, http.StatusText(500), 500)
			return
		}

		err = tmpl.Execute(w, post)
		if err != nil {
			http.Error(w, http.StatusText(500), 500)
			return
		}
	} else {

		err := r.ParseMultipartForm(4 * 1024 * 1024)
		if err != nil {
			log.Println(err)
			http.Error(w, http.StatusText(500), 500)
			return
		}

		file, handler, err := r.FormFile("media")
		if err != nil {
			log.Println(err)
			http.Error(w, http.StatusText(500), 500)
			return
		}
		defer file.Close()

		fp, err := os.Create(path.Join("data", "media", handler.Filename))
		if err != nil {
			log.Println(err)
			http.Error(w, http.StatusText(500), 500)
			return
		}
		defer fp.Close()

		io.Copy(fp, file)

		uuid := "df1852e4-4eb2-4227-acac-e1e743bb6189"
		post := models.Post{
			Title:       r.FormValue("title"),
			Subtitle:    r.FormValue("subtitle"),
			Description: r.FormValue("description"),
			Media:       handler.Filename,
		}

		err = models.UpdatePost(env.db, post, uuid)
		if err != nil {
			log.Println(err)
			http.Error(w, http.StatusText(500), 500)
			return
		}

		http.Redirect(w, r, "/", 302)
	}
}

func main() {
	dataSource := "data/data.sqlite3"
	db, err := models.InitDB(dataSource)
	if err != nil {
		log.Fatalln(err)
	}
	defer db.Close()

	env := &Env{dataSource: dataSource, db: db}

	http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(static.Static)))
	http.Handle("/media/", http.StripPrefix("/media/", http.FileServer(http.Dir("data/media"))))
	http.HandleFunc("/", env.indexHandler)
	http.HandleFunc("/post/", env.postHandler)
	http.ListenAndServe(":8000", nil)
}