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//! Rerun Spatial Space Views
//!
//! Space Views that show entities in a 2D or 3D spatial relationship.

// TODO(#3408): remove unwrap()
#![allow(clippy::unwrap_used)]

mod contexts;
mod eye;
mod heuristics;
mod instance_hash_conversions;
mod max_image_dimension_subscriber;
mod mesh_cache;
mod mesh_loader;
mod picking;
mod scene_bounding_boxes;
mod space_camera_3d;
mod space_view_2d;
mod space_view_3d;
mod spatial_topology;
mod ui;
mod ui_2d;
mod ui_3d;
mod visualizers;

use re_types::blueprint::components::BackgroundKind;
use re_types::components::{Resolution, TensorData};

pub use space_view_2d::SpatialSpaceView2D;
pub use space_view_3d::SpatialSpaceView3D;

// ---

mod view_kind {
    #[derive(Debug, Clone, Copy, PartialEq, Eq)]
    pub enum SpatialSpaceViewKind {
        TwoD,
        ThreeD,
    }
}

fn resolution_from_tensor(
    entity_db: &re_entity_db::EntityDb,
    query: &re_data_store::LatestAtQuery,
    entity_path: &re_log_types::EntityPath,
) -> Option<Resolution> {
    // TODO(#5607): what should happen if the promise is still pending?
    entity_db
        .latest_at_component::<TensorData>(entity_path, query)
        .and_then(|tensor| {
            tensor
                .image_height_width_channels()
                .map(|hwc| Resolution([hwc[1] as f32, hwc[0] as f32].into()))
        })
}

/// Utility for querying a pinhole archetype instance.
///
// TODO(andreas): This is duplicated into `re_viewport`
fn query_pinhole(
    entity_db: &re_entity_db::EntityDb,
    query: &re_data_store::LatestAtQuery,
    entity_path: &re_log_types::EntityPath,
) -> Option<re_types::archetypes::Pinhole> {
    // TODO(#5607): what should happen if the promise is still pending?
    entity_db
        .latest_at_component::<re_types::components::PinholeProjection>(entity_path, query)
        .map(|image_from_camera| re_types::archetypes::Pinhole {
            image_from_camera: image_from_camera.value,
            resolution: entity_db
                .latest_at_component(entity_path, query)
                .map(|c| c.value)
                .or_else(|| resolution_from_tensor(entity_db, query, entity_path)),
            camera_xyz: entity_db
                .latest_at_component(entity_path, query)
                .map(|c| c.value),
        })
}

pub(crate) fn configure_background(
    ctx: &re_viewer_context::ViewerContext<'_>,
    kind: BackgroundKind,
    color: re_types::components::Color,
) -> (Option<re_renderer::QueueableDrawData>, re_renderer::Rgba) {
    use re_renderer::renderer;

    match kind {
        BackgroundKind::GradientDark => (
            Some(
                renderer::GenericSkyboxDrawData::new(
                    ctx.render_ctx,
                    renderer::GenericSkyboxType::GradientDark,
                )
                .into(),
            ),
            re_renderer::Rgba::TRANSPARENT, // All zero is slightly faster to clear usually.
        ),

        BackgroundKind::GradientBright => (
            Some(
                renderer::GenericSkyboxDrawData::new(
                    ctx.render_ctx,
                    renderer::GenericSkyboxType::GradientBright,
                )
                .into(),
            ),
            re_renderer::Rgba::TRANSPARENT, // All zero is slightly faster to clear usually.
        ),

        BackgroundKind::SolidColor => (None, color.into()),
    }
}