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use crate::{
    buffers::UniformBuffer,
    renderer::{PassOp, RenderPassExt, RenderTarget},
};

#[derive(Debug)]
pub struct Frame {
    pub encoder: wgpu::CommandEncoder,
}

impl Frame {
    pub fn new(encoder: wgpu::CommandEncoder) -> Self {
        Self { encoder }
    }

    pub fn pass<'a, T: RenderTarget>(
        &'a mut self,
        op: PassOp,
        view: &'a T,
    ) -> wgpu::RenderPass<'a> {
        wgpu::RenderPass::begin(
            &mut self.encoder,
            &view.color_target(),
            &view.zdepth_target(),
            op,
        )
    }

    pub fn copy(&mut self, src: &UniformBuffer, dst: &UniformBuffer) {
        self.encoder.copy_buffer_to_buffer(
            &src.wgpu,
            0,
            &dst.wgpu,
            0,
            (src.size * src.count) as wgpu::BufferAddress,
        );
    }

    pub fn encoder(&self) -> &wgpu::CommandEncoder {
        &self.encoder
    }

    pub fn encoder_mut(&mut self) -> &mut wgpu::CommandEncoder {
        &mut self.encoder
    }
}