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use ecs::pair::{ChildOf, Pair};
use ecs::phase::{Phase, POST_UPDATE as POST_UPDATE_PHASE};
use ecs::{declare_entity, Component};

use crate::builder;

pub mod opengl;

declare_entity!(
    pub RENDER_PHASE,
    (
        Phase,
        Pair::builder()
            .relation::<ChildOf>()
            .target_id(*POST_UPDATE_PHASE)
            .build()
    )
);

builder! {
/// Window graphics properties.
#[builder(name=GraphicsPropertiesBuilder, derives=(Debug, Clone))]
#[derive(Debug, Clone, Component)]
#[non_exhaustive]
pub struct GraphicsProperties
{
    /// Number of samples for multisampling. `None` means no multisampling.
    #[builder(skip_generate_fn)]
    pub multisampling_sample_cnt: Option<u8>,

    /// Whether graphics API debugging is enabled.
    pub debug: bool,

    /// Whether depth testing is enabled
    pub depth_test: bool,
}
}

impl GraphicsProperties
{
    pub fn builder() -> GraphicsPropertiesBuilder
    {
        GraphicsPropertiesBuilder::default()
    }
}

impl Default for GraphicsProperties
{
    fn default() -> Self
    {
        Self::builder().build()
    }
}

impl GraphicsPropertiesBuilder
{
    pub fn multisampling_sample_cnt(mut self, multisampling_sample_cnt: u8) -> Self
    {
        self.multisampling_sample_cnt = Some(multisampling_sample_cnt);
        self
    }

    pub fn no_multisampling(mut self) -> Self
    {
        self.multisampling_sample_cnt = None;
        self
    }
}

impl Default for GraphicsPropertiesBuilder
{
    fn default() -> Self
    {
        Self {
            multisampling_sample_cnt: Some(8),
            debug: false,
            depth_test: true,
        }
    }
}