use comrak;
use glob::glob;
use inflector::Inflector;
use std::fs::File;
use std::io::prelude::*;
use std::path::PathBuf;
use std::time::SystemTime;

pub fn data_to_html(data: &String) -> String {
    comrak::markdown_to_html(data,
        &comrak::ComrakOptions::default())
}

#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct List {
    pub id: String,
    pub index: i8,
    pub data: String,
    pub mtime: SystemTime,
    pub name: String,
    path: PathBuf
}

impl List {
    pub fn to_html(&self) -> String {
      data_to_html(&self.data)
    }

    pub fn update_data(&mut self, data : &String) {
        let mut file = File::create(&self.path)
            .expect(&format!("Cannot open list file {}",
                self.path.to_str().unwrap()));
        file.write_all(data.as_bytes())
            .expect(&format!("Cannot write list file {}",
                self.path.to_str().unwrap()));

        self.data = data.clone();
        let metadata = file.metadata().unwrap();
        self.mtime = metadata.modified().unwrap();
    }

    pub fn load_all() -> Vec<Self> {
        let mut lists : Vec<List> = vec![];
        let mut index = 0;
        for entry in glob("lists/*.list").unwrap().filter_map(Result::ok) {
            let file_name = entry.file_name().unwrap().to_str().unwrap();
            let name = match file_name.find('.') {
                Some(index) => &file_name[0..index],
                None        => "unknown"
            };
            let mut data = String::new();
            let mut file = File::open(&entry)
                .expect(&format!("Cannot open list file {}", file_name));
            file.read_to_string(&mut data)
                .expect(&format!("Cannot read list file {}", file_name));
            let metadata = file.metadata()
                .expect(&format!("Cannot get metadata of list file {}", file_name));

            let mut list = List {
                id: String::from(name),
                index : index,
                data: data,
                mtime: metadata.modified().unwrap(),
                name: String::from(name).to_title_case(),
                path: entry.clone()
            };
            lists.push(list);
            index += 1;
        }
        lists
    }
}