use std::io;
use markdown::to_html;
use rss::{Channel, ItemBuilder};

fn main() -> io::Result<()> {
    let posts = std::env::args().skip(2).map(|f| {
            let contents = std::fs::read_to_string(f.clone())?;
            Ok(to_html(&contents))
    }).collect::<Result<Vec<String>, io::Error>>()?;

    if let Some(mode) = std::env::args().skip(1).next() {
        match mode.as_str() {
            "rss" => {
                let mut channel = Channel::default();
                channel.title = "MDF blog huge".to_string();
                channel.link = "rakarake.xyz".to_string();
                channel.description = "morbius text wow".to_string();
                channel.items = posts.iter().enumerate().map(|(i, p)| {
                    ItemBuilder::default()
                        .title(format!("Blog post {i}"))
                        .description(Some(p.clone()))
                        .build()                   
                }).collect();
                print!("{}", channel);
            },
            "html" => {
                print!("{}", posts.iter().map(|p| format!("<div>{p}</div>")).collect::<Vec<String>>().concat())
            },
            _ => eprintln!("need to specify 'rss' or 'html'"),
        }
    }
    Ok(())
}