//! Traits for describing Cyborg's scene representation.
//!
//! TODO this will all need to be replaced in favor of a way to represent
//! querying component and resource data framework-agnostically

use crate::storage::mesh::MeshHandle;
use parking_lot::RwLock;
use std::sync::Arc;

pub struct TransformedMesh {
    pub transform: glam::Mat4,
    pub mesh: MeshHandle,
}

#[derive(Default)]
pub struct Meshes {
    pub transformed: Vec<TransformedMesh>,
}

pub type MeshesHandle = Arc<RwLock<Meshes>>;

#[repr(C)]
#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
pub struct DebugVertex {
    pub position: [f32; 3],
    pub color: [f32; 3],
}

pub const DEBUG_VERTEX_ATTRS: &[wgpu::VertexAttribute] =
    &wgpu::vertex_attr_array![0 => Float32x3, 1 => Float32x3];

impl DebugVertex {
    pub fn desc() -> wgpu::VertexBufferLayout<'static> {
        wgpu::VertexBufferLayout {
            array_stride: std::mem::size_of::<Self>() as wgpu::BufferAddress,
            step_mode: wgpu::VertexStepMode::Vertex,
            attributes: DEBUG_VERTEX_ATTRS,
        }
    }
}

pub type DebugIndex = u32;

pub struct DebugDraw {
    pub vertices: Vec<DebugVertex>,
    pub indices: Vec<DebugIndex>,
}

#[derive(Default)]
pub struct DebugDraws {
    pub draws: Vec<DebugDraw>,
}

pub type DebugDrawsHandle = Arc<RwLock<DebugDraws>>;