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use rin_material::texture::CubemapSampler;
use rin_material::Parameter;
use mutiny_derive::Material;
use rinecs::EntitiesCreationExt;
use crate::scene::CreationProxy;
use crate::scene::{CreationContext, Scene};
use crate::components::Visible;
use rin_math::{Unit, Vec3, vec2, UnitQuat};
use rin_graphics::{self as graphics, Node};
use rinecs::{Component};
use serde_derive::{Serialize, Deserialize};

pub struct SkyboxBuilder<'a>{
    world: CreationProxy<'a>,
    visible: bool,
    cubemap: CubemapSampler,
    cubemap_level: f32,
    up: Option<Unit<Vec3>>,
}

#[derive(Component, Debug, Serialize, Deserialize)]
pub struct Skybox;

impl<'a> crate::Builder<'a> for SkyboxBuilder<'a> {
    type Settings = CubemapSampler;
    type IdType = SkyboxMaterial;
    type Depends = ();

    fn register(world: &mut rinecs::World) {}

    fn new(world: CreationProxy<'a>, cubemap: CubemapSampler) -> SkyboxBuilder<'a> {
        SkyboxBuilder{
            world,
            visible: true,
            cubemap,
            cubemap_level: 0.,
            up: None,
        }
    }
}

impl<'a> SkyboxBuilder<'a> {
    pub fn invisible(&mut self) -> &mut SkyboxBuilder<'a> {
        self.visible = false;
        self
    }

    pub fn up(&mut self, up: Unit<Vec3>) -> &mut SkyboxBuilder<'a> {
        self.up = Some(up);
        self
    }

    pub fn cubemap_level(&mut self, cubemap_level: f32) -> &mut SkyboxBuilder<'a> {
        self.cubemap_level = cubemap_level;
        self
    }

    #[cfg(feature="gl_forward_renderer")] //TODO: remove this once register material is independent from forward renderer
    pub fn build(&mut self) -> rinecs::Entity{
        let geom = graphics::plane_texcoords(vec2(2., 2.), 1, 1);
        let full_quad = self.world.register_mesh(geom);
        let material = SkyboxMaterial{
            cubemap: Parameter::new(self.cubemap) ,
            cubemap_level: Parameter::new( self.cubemap_level ),
        };
        let material = self.world.register_material("RIN_SKYBOX_MATERIAL", material);
        let trafo = if let Some(up) = self.up.as_ref() {
            let orientation = UnitQuat::rotation_between_axis(&Vec3::y_axis(), up).unwrap();
            Node::from(orientation)
        }else{
            Node::identity()
        };
        self.world.new_entity()
            .add(Skybox)
            .add(full_quad)
            .add(material)
            .add(trafo)
            .add(Visible::new(self.visible))
            .build()
    }
}

#[derive(Material, Debug, Serialize, Deserialize)]
pub struct SkyboxMaterial{
    #[material(not_data)]
    pub cubemap: Parameter<CubemapSampler>,
    #[material(uniform)]
    pub cubemap_level: Parameter<f32>,
}