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use processing_glfw::GlfwContext;

use bevy::math::Vec3;

use processing::prelude::*;

use processing_render::render::command::DrawCommand;

use processing_render::shader_value::ShaderValue;

fn main() {

match sketch() {

Ok(_) => {

eprintln!("Sketch completed successfully");

exit(0).unwrap();

}

Err(e) => {

eprintln!("Sketch error: {:?}", e);

exit(1).unwrap();

}

};

}

fn sketch() -> error::Result<()> {

let width = 800;

let height = 600;

let mut glfw_ctx = GlfwContext::new(width, height, false)?;

init(Config::default())?;

let surface = glfw_ctx.create_surface(width, height, false)?;

let graphics = graphics_create(surface, width, height, TextureFormat::Rgba16Float)?;

let gltf = gltf_load(graphics, "gltf/Duck.glb")?;

let duck = gltf_geometry(gltf, "LOD3spShape")?;

let duck_mat = gltf_material(gltf, "blinn3-fx")?;

graphics_mode_3d(graphics)?;

gltf_camera(gltf, 0)?;

let light = gltf_light(gltf, 0)?;

let mut frame: u64 = 0;

while glfw_ctx.poll_events() {

let t = frame as f32 * 0.02;

let radius = 1.5;

let lx = t.cos() * radius;

let ly = 1.5;

let lz = t.sin() * radius;

transform_set_position(light, Vec3::new(lx, ly, lz))?;

transform_look_at(light, Vec3::new(0.0, 0.8, 0.0))?;

let r = (t * 8.0).sin() * 0.5 + 0.5;

let g = (t * 8.0 + 2.0).sin() * 0.5 + 0.5;

let b = (t * 8.0 + 4.0).sin() * 0.5 + 0.5;

material_set(duck_mat, "base_color", ShaderValue::Float4([r, g, b, 1.0]))?;

graphics_begin_draw(graphics)?;

graphics_record_command(

graphics,

DrawCommand::BackgroundColor(bevy::color::Color::srgb(0.1, 0.1, 0.12)),

)?;

graphics_record_command(graphics, DrawCommand::Material(duck_mat))?;

graphics_record_command(graphics, DrawCommand::Geometry(duck))?;

graphics_end_draw(graphics)?;

frame += 1;

}

Ok(())

}