package main

import (
	"fmt"
	"html/template"
	"io/ioutil"
	"strings"
	"time"
)

//Post : Is exported
type Post struct {
	Date     time.Time
	Title    string
	URLTitle string
	Content  template.HTML
}

var lewd = "Lewd Interlude"
var reveries = "Takunomi Coffee Reveries, Vol. I"
var romantic = "Romantic Japanese Christmas Takunomi Saturday Recap"

func spaceToHyphen(s string) string {
	return strings.Replace(s, " ", "-", -1)
}

func setDate(year int, month time.Month, day int) time.Time {
	return time.Date(year, month, day, 0, 0, 0, 0, time.UTC)
}

func newPost(date time.Time, title string) Post {
	return Post{date, title, spaceToHyphen(title), getPostContent(title)}
}

var postsCollection = []Post{
	newPost(setDate(2017, time.September, 12), lewd),
	newPost(setDate(2017, time.March, 4), reveries),
	newPost(setDate(2017, time.April, 23), romantic),
}

func getPostByURLTitle(title string) Post {
	for _, post := range postsCollection {
		if post.URLTitle == title {
			return post
		}
	}
	return Post{}
}

func getPostContent(title string) template.HTML {
	content, err := ioutil.ReadFile("posts/" + title)
	if err != nil {
		fmt.Println(content)
		return template.HTML("")
	}
	return template.HTML(string(content[:len(content)]))
}

func getNewestPosts(numberOfPosts int) []Post {
	var posts []Post
	for i := 0; i < numberOfPosts; i++ {
		post := postsCollection[i]
		posts = append(posts, getPostByURLTitle(post.URLTitle))
	}
	return posts
}