extern crate rand;
extern crate sdl2;
extern crate time;

use std::f32::consts::PI;

use sdl2::event::Event;
use sdl2::event::WindowEvent;
use sdl2::gfx::primitives::DrawRenderer;
use sdl2::keyboard::Keycode;
use sdl2::pixels::Color;
use sdl2::rect::Rect;
use sdl2::video::FullscreenType;
use time::PreciseTime;

use app::*;
use common::Point2D;

mod app;
#[macro_use] mod common;
mod boll;
mod sprites;

const SCREEN_WIDTH: u32 = 1280;
const SCREEN_HEIGHT: u32 = (SCREEN_WIDTH as f64 * (1440.0 / 2560.0)) as u32;
const FPS: u32 = 60;
const NS_PER_FRAME: u32 = 1_000_000_000 / FPS;

fn main() {
    println!("starting...");
    let mut app = App::new();
    app.load_sprites(&[
        ("block", "res/block.bmp"),
        ("mario", "res/mario-trans.png"),
    ]);

    let mut frame_count: u64 = 0;
    let mut fps_time = PreciseTime::now();
    let mut last_time = PreciseTime::now();

    let mut mario_angle = 0.0;

    'running: loop {
        app.canvas.set_draw_color(Color::RGB(0, 0, 0));
        app.canvas.clear();
        {
            let blocks = 20;
            let size = 32;
            let offset = point!((SCREEN_WIDTH as i32 - (blocks + 1) * size) / 2, (SCREEN_HEIGHT as i32 - (blocks + 1) * size) / 2);
            let block = app.sprites.get("block");
            for i in 0..blocks {
                app.canvas.copy(block, None, Rect::new((i) * size + offset.x, (0) * size + offset.y, size as u32, size as u32)).unwrap();
                app.canvas.copy(block, None, Rect::new((blocks - i) * size + offset.x, (blocks) * size + offset.y, size as u32, size as u32)).unwrap();
                app.canvas.copy(block, None, Rect::new((0) * size + offset.x, (blocks - i) * size + offset.y, size as u32, size as u32)).unwrap();
                app.canvas.copy(block, None, Rect::new((blocks) * size + offset.x, (i) * size + offset.y, size as u32, size as u32)).unwrap();
            }
        }
        {
            let size = 64;
            let offset = point!((SCREEN_WIDTH as i32 - size) / 2, (SCREEN_HEIGHT as i32 - size) / 2);
            let radius = 110.0 + size as f32 * 0.5;
            let angle = (mario_angle as f32 - 90.0) * PI / 180.0;
            let offset2 = point!((angle.cos() * radius) as i32, (angle.sin() * radius) as i32);
            app.canvas.copy_ex(app.sprites.get("mario"), None, Rect::new(offset.x + offset2.x, offset.y + offset2.y, size as u32, size as u32), mario_angle, sdl2::rect::Point::new(size / 2, size / 2), false, false).unwrap();
            mario_angle += 1.0;
            if mario_angle >= 360.0 { mario_angle -= 360.0 }
        }
        {
            let p = point!((SCREEN_WIDTH / 2) as i16, (SCREEN_HEIGHT / 2) as i16);
            app.canvas.circle(p.x, p.y, 100, Color::RGB(255, 255, 255)).unwrap();
            app.canvas.aa_circle(p.x, p.y, 110, Color::RGB(255, 255, 255)).unwrap();
            app.canvas.ellipse(p.x, p.y, 50, 100, Color::RGB(255, 255, 255)).unwrap();
            app.canvas.aa_ellipse(p.x, p.y, 110, 55, Color::RGB(255, 255, 255)).unwrap();
        }

//        window.gl_swap_window();
        for event in app.event_pump.poll_iter() {
            match event {
                Event::Quit { .. } | Event::KeyDown { keycode: Some(Keycode::Escape), .. } => {
                    break 'running;
                }
                Event::KeyDown { keycode: Some(Keycode::F11), .. } => {
                    match app.canvas.window().fullscreen_state() {
                        FullscreenType::Off => app.canvas.window_mut().set_fullscreen(FullscreenType::Desktop),
                        _                   => app.canvas.window_mut().set_fullscreen(FullscreenType::Off)
                    }.unwrap();
                }
                Event::Window { win_event: WindowEvent::Resized(x, y), .. } => { println!("window resized({}, {})", x, y) }
                Event::Window { win_event: WindowEvent::Maximized, .. } => { println!("window maximized") }
                Event::Window { win_event: WindowEvent::Restored, .. } => { println!("window restored") }
                Event::Window { win_event: WindowEvent::Enter, .. } => { println!("window enter") }
                Event::Window { win_event: WindowEvent::Leave, .. } => { println!("window leave") }
                Event::Window { win_event: WindowEvent::FocusGained, .. } => { println!("window focus gained") }
                Event::Window { win_event: WindowEvent::FocusLost, .. } => { println!("window focus lost") }
                _ => { app.state.on_event(event) }
            }
        }

        let duration = last_time.to(PreciseTime::now()).num_nanoseconds().unwrap() as Nanoseconds;
        last_time = PreciseTime::now();
        app.state.update(duration);
        app.state.render(&mut app.canvas);
        app.canvas.present();

        frame_count += 1;
        if frame_count == FPS as u64 {
            let duration = fps_time.to(PreciseTime::now()).num_nanoseconds().unwrap() as f64 / 1_000_000_000.0;
            println!("fps: {}", frame_count as f64 / duration);
            frame_count = 0;
            fps_time = PreciseTime::now();
        }
    }

    app.state.leave();
}