#![feature(plugin)]
#![plugin(rocket_codegen)]

extern crate comrak;
extern crate glob;
extern crate inflector;
extern crate rocket;
extern crate rocket_contrib;
#[macro_use] extern crate serde_derive;
extern crate serde_json;

mod list;
mod static_files;

use list::List;
use rocket::{Rocket, State};
use rocket_contrib::{Json, Template};
use std::collections::HashMap;
use std::sync::RwLock;

type ListStore = RwLock<Vec<List>>;

#[derive(Serialize)]
struct IndexTemplateContext<'a> {
  lists: Vec<HashMap<&'a str, &'a str>>
}

#[get("/")]
fn index(lists: State<ListStore>) -> Template {
    let lists = lists.read().unwrap();
    let mut list_kvs = vec![];
    for list in lists.iter() {
        let mut list_kv = HashMap::new();
        list_kv.insert("id", list.id.as_ref());
        list_kv.insert("name", list.name.as_ref());
        list_kvs.push(list_kv);
    }
    let context = IndexTemplateContext { lists: list_kvs };
    Template::render("index", &context)
}

#[get("/lists", format = "application/json")]
fn list_index(lists: State<ListStore>) -> Option<Json<Vec<List>>> {
    let lists = lists.read().unwrap();
    Some(Json(lists.clone()))
}

#[get("/lists/<list_id>", format = "text/html")]
fn list_show_html(list_id: String, lists: State<ListStore>) -> Option<String> {
    let lists = lists.read().unwrap();
    let list = lists.iter().find( |list| list.id == list_id )?;
    Some(list.to_html())
}

#[get("/lists/<list_id>", format = "application/json")]
fn list_show_json(list_id: String, lists: State<ListStore>) -> Option<Json<List>> {
    let lists = lists.read().unwrap();
    let list = lists.iter().find( |list| list.id == list_id )?;
    Some(Json(list.clone()))
}

#[put("/lists/<list_id>", format = "application/json", data = "<new_list>")]
fn list_update(list_id: String, new_list: Json<List>, lists: State<ListStore>) -> Option<Json<List>> {
    let mut lists = lists.write().unwrap();
    let list = lists.iter_mut().find( |list| list.id == list_id )?;
    list.update_data(&new_list.data);
    Some(Json(list.clone()))
}

fn rocket() -> Rocket {
    let lists = list::List::load_all();
    rocket::ignite()
        .manage(RwLock::new(lists))
        .mount("/", routes![index, list_index, list_show_html, list_show_json, list_update, static_files::all])
        .attach(Template::fairing())
}

fn main() {
    rocket().launch();
}