/*
 * tmtd - Suckless To Do list
 * Copyright (C) 2022 C4TG1RL5
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of  MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

use crate::{database::Database, task, templates};
use actix_web::{http::StatusCode, web, HttpResponse, HttpResponseBuilder, HttpServer, Responder};
use askama::Template;
use std::net::SocketAddr;
use std::sync::Arc;

pub struct App {
    pub server: actix_web::dev::Server,
}

impl App {
    pub async fn new(addr: SocketAddr, db: Arc<Database>) -> anyhow::Result<Self> {
        let db = db.clone();
        let server = HttpServer::new(move || {
            actix_web::App::new().service((
                web::resource("/")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::get().to(index)),
                web::resource("/users")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::get().to(users)),
                web::resource("/task")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::get().to(tasks)),
                web::resource("/admin")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::get().to(admin)),
                web::resource("/create")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::get().to(create)),
                web::resource("/login")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::get().to(login)),
                web::resource("/register")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::get().to(register)),
                web::resource("/api/task/create")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::post().to(create_task)),
                web::resource("/api/task/move")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::post().to(move_task)),
                //web::resource("/api/task/sort").route(web::post().to(sort_task)),
                web::resource("/api/login")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::post().to(login_user)),
                web::resource("/api/register")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::post().to(register_user)),
                web::resource("/api/logout")
                    .app_data(web::Data::new(db.clone()))
                    .route(web::get().to(logout)),
            ))
        })
        .bind(addr)?
        .run();
        Ok(App { server })
    }
}

async fn index(db: web::Data<Arc<Database>>) -> impl Responder {
    let logged_in = db.logged_in().await;
    let index = templates::Index { logged_in };
    let html = index.render().unwrap();
    HttpResponseBuilder::new(StatusCode::OK).body(html)
}

async fn tasks(db: web::Data<Arc<Database>>) -> impl Responder {
    let tasks = db.get_tasks().await;
    let html = tasks.render().unwrap();
    HttpResponseBuilder::new(StatusCode::OK).body(html)
}

async fn users(db: web::Data<Arc<Database>>) -> impl Responder {
    let logged_in = db.logged_in().await;
    let users = templates::Users { logged_in };
    let html = users.render().unwrap();
    HttpResponseBuilder::new(StatusCode::OK).body(html)
}

async fn admin(db: web::Data<Arc<Database>>) -> impl Responder {
    let logged_in = db.logged_in().await;
    let admin_panel = templates::AdminPanel { logged_in };
    let html = admin_panel.render().unwrap();
    HttpResponseBuilder::new(StatusCode::OK).body(html)
}

async fn create(db: web::Data<Arc<Database>>) -> impl Responder {
    let logged_in = db.logged_in().await;
    let create = templates::CreateTask { logged_in };
    let html = create.render().unwrap();
    HttpResponseBuilder::new(StatusCode::OK).body(html)
}

async fn login(db: web::Data<Arc<Database>>) -> impl Responder {
    let logged_in = db.logged_in().await;
    let login = templates::Login { logged_in };
    let html = login.render().unwrap();
    HttpResponseBuilder::new(StatusCode::OK).body(html)
}

async fn register(db: web::Data<Arc<Database>>) -> impl Responder {
    let logged_in = db.logged_in().await;
    let register = templates::Register { logged_in };
    let html = register.render().unwrap();
    HttpResponseBuilder::new(StatusCode::OK).body(html)
}

async fn create_task(
    req: web::Form<task::CreateTask>,
    db: web::Data<Arc<Database>>,
) -> impl Responder {
    let task = req.into_inner();
    db.create_task(&task).await;
    HttpResponse::SeeOther()
        .insert_header(("Location", "/task"))
        .finish()
}

async fn move_task(req: web::Form<task::MoveTask>, db: web::Data<Arc<Database>>) -> impl Responder {
    let task = req.into_inner();
    db.move_task(&task).await;
    HttpResponse::SeeOther()
        .insert_header(("Location", "/task"))
        .finish()
}

async fn sort_task(req: web::Form<task::SortTask>) -> impl Responder {
    // TODO: save selected categories in a cookie or something
    HttpResponse::SeeOther()
        .insert_header(("Location", "/task"))
        .finish()
}

async fn login_user(req: web::Form<task::Login>, db: web::Data<Arc<Database>>) -> impl Responder {
    db.login(&req.username, &req.password).await;
    HttpResponse::SeeOther()
        .insert_header(("Location", "/"))
        .finish()
}

async fn register_user(
    req: web::Form<task::Register>,
    db: web::Data<Arc<Database>>,
) -> impl Responder {
    db.register(&req.username, &req.password).await;
    HttpResponse::SeeOther()
        .insert_header(("Location", "/"))
        .finish()
}

async fn logout(db: web::Data<Arc<Database>>) -> impl Responder {
    // TODO: log the user out
    HttpResponse::SeeOther()
        .insert_header(("Location", "/"))
        .finish()
}