use markdown::{to_html_with_options, CompileOptions, Options};
use regex::Regex;
use std::collections::HashMap;
use std::{env, fs::read_to_string};
use tera::{Tera, Context};
fn main() {
    let args: Vec<String> = env::args().collect();
    if args.len() < 2 {
        panic!("Please provide md file");
    }

    let mut markdown = read_to_string(args.get(1).unwrap()).expect("File does not exist");

    let mut tera = Tera::new("templates/*").unwrap();
    tera.autoescape_on(vec![]);

    let re_key_value = Regex::new(r"(?ms)---(.*)---(?:\n)").unwrap();

    let binding_markdown = markdown.clone();

    let key_value_string = re_key_value
        .find(binding_markdown.as_str())
        .expect("Can't find key value map in markdown");

    markdown = re_key_value
        .replace(markdown.clone().as_str(), "")
        .to_string();

    let mut key_value: HashMap<&str, &str> = HashMap::new();

    for line in key_value_string.as_str().lines() {
        if line == "---" {
            continue;
        }
        key_value.insert(
            line.split(":")
                .collect::<Vec<&str>>()
                .get(0)
                .unwrap()
                .trim(),
            line.split(":")
                .collect::<Vec<&str>>()
                .get(1)
                .unwrap()
                .trim(),
        );
    }


    let html_markdown = to_html_with_options(
        &markdown,
        &Options {
            compile: CompileOptions {
                allow_dangerous_html: true,
                allow_dangerous_protocol: true,
                ..CompileOptions::default()
            },
            ..Options::default()
        },
    )
    .unwrap();

    key_value.insert("blog_content", &html_markdown);

    let context = Context::from_serialize(key_value).unwrap();

    let output = tera.render("blog.html", &context).unwrap();

    println!("{output}");
}