package storage

import (
	"fmt"
	"io"
	"mime"
	"mime/multipart"
	"os"
	"os/exec"
	"strings"
	"time"

	"github.com/google/uuid"
)

type (
	Entry struct {
		Date        JSTime   `json:"date"`
		Description string   `json:"description"`
		Post        string   `json:"post"`
		Likes       int      `json:"likes"`
		Tags        []string `json:"tags"`
		Media       []Media  `json:"media"`
		Prev        *Entry   `json:"-"`
		Next        *Entry   `json:"-"`
		//		Users       []string
	}
)

func (entry Entry) Count() map[string]int {
	count := make(map[string]int)
	for _, media := range entry.Media {
		count[media.Type] += 1
	}
	return count
}

func (entry Entry) Len() int { return len(entry.Media) }

func (entry *Entry) GeneratePostID() {
	entry.Post = strings.Replace(uuid.New().String(), "-", "", -1)
}

func (entry *Entry) AddMedia(file *multipart.FileHeader) (err error) {
	src, err := file.Open()
	if err != nil {
		return
	}
	defer src.Close()

	name := strings.Replace(uuid.New().String(), "-", "", -1)
	extension, err := mime.ExtensionsByType(file.Header.Get("Content-Type"))
	if err == nil {
		name = fmt.Sprintf("%s%s", name, extension[0])
	}

	media := Media{
		Type: "GraphImage",
		File: name,
	}

	// TODO ruta relativa
	postdir := fmt.Sprintf("/var/lib/igar/%s", entry.Post)
	filepath := fmt.Sprintf("%s/%s", postdir, media.File)
	os.MkdirAll(postdir, os.ModePerm)
	dst, err := os.Create(filepath)
	if err != nil {
		return
	}
	defer dst.Close()

	if _, err = io.Copy(dst, src); err != nil {
		return
	}

	if err = exec.Command("node", "thumbs/make_thumb.js", postdir).Run(); err != nil {
		// TODO fichero copiado no usado (limpieza?)
		return
	}

	entry.Media = append(entry.Media, media)

	return
}

func (entry *Entry) RemoveFiles() error {
	// Beware of removing the root directory!
	if entry.Post != "" {
		path := fmt.Sprintf("/var/lib/igar/%s", entry.Post)
		return os.RemoveAll(path)
	}
	// TODO return nil if not found?
	return nil
}

func NewEntry(desc string, date string) (entry *Entry) {
	var entryTime time.Time

	if date != "" {
		entryTime, _ = time.Parse(jsTimeLite, date)
	} else {
		entryTime = time.Now()
	}

	entry = &Entry{
		Description: desc,
		Date:        JSTime(entryTime),
	}
	entry.GeneratePostID()

	return
}