#![allow(clippy::unneeded_field_pattern)]

mod audio;
mod navigator;
mod render;

use crate::render::GliumRenderBackend;
use glutin::{
    dpi::{LogicalSize, PhysicalPosition},
    event::{ElementState, MouseButton, WindowEvent},
    event_loop::{ControlFlow, EventLoop},
    window::WindowBuilder,
    ContextBuilder,
};
use ruffle_core::backend::input::NullInputBackend;
use ruffle_core::{
    backend::audio::{AudioBackend, NullAudioBackend},
    backend::render::RenderBackend,
    Player,
};
use std::path::PathBuf;
use std::time::Instant;
use structopt::StructOpt;

#[derive(StructOpt, Debug)]
#[structopt(name = "basic")]
struct Opt {
    #[structopt(name = "FILE", parse(from_os_str))]
    input_path: PathBuf,
}

fn main() {
    env_logger::init();

    let opt = Opt::from_args();

    let ret = run_player(opt.input_path);

    if let Err(e) = ret {
        eprintln!("Fatal error:\n{}", e);
        std::process::exit(-1);
    }
}

fn run_player(input_path: PathBuf) -> Result<(), Box<dyn std::error::Error>> {
    let swf_data = std::fs::read(input_path)?;

    let event_loop = EventLoop::new();
    let window_builder = WindowBuilder::new().with_title("Ruffle");
    let windowed_context = ContextBuilder::new()
        .with_vsync(true)
        .with_multisampling(4)
        .with_srgb(true)
        .with_stencil_buffer(8)
        .build_windowed(window_builder, &event_loop)?;
    let audio: Box<dyn AudioBackend> = match audio::CpalAudioBackend::new() {
        Ok(audio) => Box::new(audio),
        Err(e) => {
            log::error!("Unable to create audio device: {}", e);
            Box::new(NullAudioBackend::new())
        }
    };
    let renderer = GliumRenderBackend::new(windowed_context)?;
    let navigator = navigator::ExternalNavigatorBackend::new(); //TODO: actually implement this backend type
    let display = renderer.display().clone();
    let input = NullInputBackend::new();
    let mut player = Player::new(renderer, audio, navigator, input, swf_data)?;
    player.set_is_playing(true); // Desktop player will auto-play.

    let logical_size: LogicalSize = (player.movie_width(), player.movie_height()).into();
    let hidpi_factor = display.gl_window().window().hidpi_factor();

    // Set initial size to movie dimensions.
    display.gl_window().window().set_inner_size(logical_size);
    display
        .gl_window()
        .resize(logical_size.to_physical(hidpi_factor));

    let mut mouse_pos = PhysicalPosition::new(0.0, 0.0);
    let mut time = Instant::now();
    loop {
        // Poll UI events
        event_loop.run(move |event, _window_target, control_flow| {
            *control_flow = ControlFlow::Wait;
            match event {
                glutin::event::Event::LoopDestroyed => return,
                glutin::event::Event::WindowEvent { event, .. } => match event {
                    WindowEvent::Resized(logical_size) => {
                        let size = logical_size.to_physical(hidpi_factor);
                        player.set_viewport_dimensions(
                            size.width.ceil() as u32,
                            size.height.ceil() as u32,
                        );
                        player.renderer_mut().set_viewport_dimensions(
                            size.width.ceil() as u32,
                            size.height.ceil() as u32,
                        );
                    }
                    WindowEvent::CursorMoved { position, .. } => {
                        let position = position.to_physical(hidpi_factor);
                        mouse_pos = position;
                        let event = ruffle_core::PlayerEvent::MouseMove {
                            x: position.x,
                            y: position.y,
                        };
                        player.handle_event(event);
                    }
                    WindowEvent::MouseInput {
                        button: MouseButton::Left,
                        state: pressed,
                        ..
                    } => {
                        let event = if pressed == ElementState::Pressed {
                            ruffle_core::PlayerEvent::MouseDown {
                                x: mouse_pos.x,
                                y: mouse_pos.y,
                            }
                        } else {
                            ruffle_core::PlayerEvent::MouseUp {
                                x: mouse_pos.x,
                                y: mouse_pos.y,
                            }
                        };
                        player.handle_event(event);
                    }
                    WindowEvent::CursorLeft { .. } => {
                        player.handle_event(ruffle_core::PlayerEvent::MouseLeft)
                    }
                    WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
                    _ => (),
                },
                _ => (),
            }

            // After polling events, sleep the event loop until the next event or the next frame.
            if *control_flow == ControlFlow::Wait {
                let new_time = Instant::now();
                let dt = new_time.duration_since(time).as_micros();
                if dt > 0 {
                    time = new_time;
                    player.tick(dt as f64 / 1000.0);
                }

                *control_flow = ControlFlow::WaitUntil(new_time + player.time_til_next_frame());
            }
        });
    }
}