use ecs::World;
use ui::prelude::*;
use vulkan_rs::prelude::*;

use crate::Result;

use std::sync::Arc;

use crate::prelude::*;

pub trait TScene: Send + Sync {
    fn process(
        &mut self,
        buffer_recorder: &mut CommandBufferRecorder<'_>,
        images: &TargetMode<Vec<Arc<Image>>>,
        indices: &TargetMode<usize>,
    ) -> Result<()>;

    fn resize(
        &mut self,
        window_width: f32,
        window_height: f32,
        images: &TargetMode<Vec<Arc<Image>>>,
    ) -> Result<()>;
}

pub trait PostProcess: Send + Sync {
    /// higher priority means, it is executed earlier
    fn priority(&self) -> u32;

    fn process(
        &self,
        buffer_recorder: &mut CommandBufferRecorder<'_>,
        indices: &TargetMode<usize>,
    ) -> Result<()>;
    fn resize(&self, width: u32, height: u32, images: &TargetMode<Vec<Arc<Image>>>) -> Result<()>;
}

pub trait RenderCore: std::fmt::Debug + Send + Sync {
    fn next_frame(&mut self, world: &mut World) -> Result<bool>;

    fn resize(&mut self, world: &mut World, w: u32, h: u32) -> Result<()>;

    fn format(&self) -> VkFormat;
    fn image_layout(&self) -> VkImageLayout {
        VK_IMAGE_LAYOUT_PRESENT_SRC_KHR
    }

    fn set_clear_color(&self, color: [f32; 4]);

    // post process handling
    fn add_post_processing_routine(&self, post_process: Arc<dyn PostProcess>);
    fn remove_post_processing_routine(&self, post_process: Arc<dyn PostProcess>);
    fn clear_post_processing_routines(&self);

    // getter
    fn image_count(&self) -> usize;
    fn images(&self) -> TargetMode<Vec<Arc<Image>>>;
    fn width(&self) -> u32;
    fn height(&self) -> u32;
    fn transformations(&self) -> Option<(VRTransformations, VRTransformations)>;
}