#![allow(dead_code)]
#![allow(unused_variables)]
#![allow(unused_mut)]

extern crate cgmath;
extern crate image;
extern crate nalgebra as na;
extern crate rand;
extern crate sfml;
extern crate time;

use sfml::graphics::*;
use sfml::graphics::{
    Color, RenderTarget, RenderWindow,
};
use sfml::system::*;
use sfml::window::{Event, Key, Style};
use sfml::window::mouse::*;
use sfml::window::mouse;

use vulkano::sync;
use std::sync::Arc;
use std::{fs, mem, iter, ptr};
use std::path::PathBuf;
use std::result;

use crate::input::Input;
use crate::slider::Slider;
use crate::timer::Timer;
use na::DimAdd;
use std::time::{SystemTime, Duration};
use std::ffi::CStr;
use std::ptr::write;
use vulkano::buffer::{BufferUsage, CpuAccessibleBuffer, DeviceLocalBuffer, ImmutableBuffer, BufferAccess};
use vulkano::command_buffer::AutoCommandBufferBuilder;
use vulkano::descriptor::descriptor_set::PersistentDescriptorSet;
use vulkano::device::{Device, DeviceExtensions};
use vulkano::instance::{Instance, InstanceExtensions, PhysicalDevice};
use vulkano::pipeline::ComputePipeline;
use vulkano::sync::GpuFuture;
use shaderc::CompileOptions;
use shade_runner::CompileError;

mod slider;
mod timer;
mod input;
mod vkprocessor;
mod util;

// What next?

// Second sprite for rendering paths at x10 or so resolution
// color bucketing

fn main() {

    let instance = Instance::new(None, &InstanceExtensions::none(), None).unwrap();
    let mut processor = vkprocessor::VkProcessor::new(&instance);
    processor.compile_kernel(String::from("simple-edge.compute"));
    processor.load_buffers(String::from("funky-bird.jpg"));
    processor.run_kernel();
    processor.read_image();
    processor.save_image();

    let mut window = RenderWindow::new(
        (900, 900),
        "Custom drawable",
        Style::CLOSE,
        &Default::default(),
    );

    let mut timer = Timer::new();
    let mut input = Input::new();

    let font = Font::from_file("resources/fonts/sansation.ttf").unwrap();

    let xy = processor.xy;
    let mut bg_texture = Texture::new(xy.0, xy.1).unwrap();
    bg_texture.update_from_pixels(processor.read_image().as_slice(), xy.0, xy.1, 0, 0);

    let mut background_sprite = Sprite::with_texture(&bg_texture);
    background_sprite.set_position((0., 0.));

    let mut slider = Slider::new(40.0, None);

    let mut selected_colors = Vec::new();


    let step_size: f32 = 0.005;
    let mut elapsed_time: f32;
    let mut delta_time: f32;
    let mut accumulator_time: f32 = 0.0;
    let mut current_time: f32 = timer.elap_time();

    let mut mouse_xy = Vector2i::new(0,0);

    while window.is_open() {

        while let Some(event) = window.poll_event() {
            match event {
                Event::Closed => return,
                Event::KeyPressed { code, .. } => {
                    if code == Key::Escape {
                        return;
                    }
                },
                Event::MouseButtonPressed { button, x, y} => {
                    let x = x as u32;
                    let y = y as u32;
                    mouse_xy = mouse::desktop_position();
                    let r = processor.image_buffer[((processor.xy.0 * y + x) * 4 + 0) as usize] as u8;
                    let g = processor.image_buffer[((processor.xy.0 * y + x) * 4 + 1) as usize] as u8;
                    let b = processor.image_buffer[((processor.xy.0 * y + x) * 4 + 2) as usize] as u8;
                    let a = processor.image_buffer[((processor.xy.0 * y + x) * 4 + 3) as usize] as u8;

                    selected_colors.push(
                        RectangleShape::with_size(Vector2f::new(30.0, 30.0))
                    );

                    let mut x_position = 45.0 * selected_colors.len() as f32;

                    selected_colors.last_mut().unwrap().set_position(Vector2f::new(x_position, 80.0));
                    selected_colors.last_mut().unwrap().set_fill_color(&Color::rgba(r,g,b,a));
                },
                Event::MouseWheelScrolled { wheel, delta, x, y } => {
                    if delta > 0.0 {
                        background_sprite.set_scale(background_sprite.get_scale()*Vector2f::new(1.1,1.1));
                    } else {
                        background_sprite.set_scale(background_sprite.get_scale()*Vector2f::new(0.9,0.9));
                    }
                },
                _ => {}
            }
            input.ingest(&event)
        }

        // Dragging by middle click
        if input.is_mousebutton_held(Button::Middle) {
            let delta = mouse_xy - mouse::desktop_position();
            mouse_xy = mouse::desktop_position();
            background_sprite.set_position(
                background_sprite.position() - Vector2f::new(delta.x as f32, delta.y as f32)
            );
        }

        elapsed_time = timer.elap_time();
        delta_time = elapsed_time - current_time;
        current_time = elapsed_time;
        if delta_time > 0.02 {
            delta_time = 0.02;
        }
        accumulator_time += delta_time;

        while (accumulator_time - step_size) >= step_size {
            accumulator_time -= step_size;
        }

        window.clear(&Color::BLACK);

        window.draw(&background_sprite);

        window.draw(&slider);

        for i in &selected_colors {
            window.draw(i);
        }

        window.display();
    }
}