use chrono::NaiveDate;
use regex::Regex;
use rust_embed::RustEmbed;
use sailfish::TemplateOnce;
use std::cmp::{Eq, Ord, PartialEq, PartialOrd};
use std::str;

pub const BLOG_REGEX: &str = r"(?P<date>[\d]{4}-[\d]{2}-[\d]{2})(?P<title>[a-zA-Z0-9-_]*)";

#[derive(RustEmbed)]
#[folder = "content/posts/"]
pub struct PostAsset;

#[derive(TemplateOnce)]
#[template(path = "index.html")]
pub struct IndexTemplate {
    pub posts: Vec<BlogEntry>,
}

#[derive(TemplateOnce)]
#[template(path = "post.html")]
pub struct PostTemplate {
    pub content: String,
    pub title: String,
    pub date: String,
}

#[derive(PartialEq, Eq, PartialOrd, Ord)]
pub struct BlogEntry {
    pub title: String,
    pub datetime: NaiveDate,
    pub file: String,
}

impl BlogEntry {
    pub fn new(path: &String) -> BlogEntry {
        let re = Regex::new(BLOG_REGEX).unwrap();
        let caps = re.captures(path).unwrap();
        let date = &caps["date"];
        let title = str::replace(&caps["title"], "_", " ");

        BlogEntry {
            title: String::from(title),
            file: String::from(path),
            datetime: NaiveDate::parse_from_str(date, "%Y-%m-%d").unwrap(),
        }
    }

}