package arm.util;

import haxe.Json;
import kha.arrays.Float32Array;
import iron.RenderPath;
import iron.Scene;
import iron.data.SceneFormat;
import iron.data.MaterialData;
import iron.object.Object;
import iron.object.MeshObject;
import arm.ui.UISidebar;

class ParticleUtil {

	static function f32(ar: Array<kha.FastFloat>): Float32Array {
		var res = new Float32Array(ar.length);
		for (i in 0...ar.length) res[i] = ar[i];
		return res;
	}

	public static function initParticle() {
		if (UISidebar.inst.particleMaterial != null) return;

		var raw: TParticleData = {
			name: "Particles",
			type: 0,
			loop: false,
			render_emitter: false,
			count: 1000,
			frame_start: 0,
			frame_end: 1000,
			lifetime: 400,
			lifetime_random: 0.5,
			emit_from: 1,
			object_align_factor: f32([0, 0, -40]),
			factor_random: 2.0,
			physics_type: 0,
			particle_size: 1.0,
			size_random: 0,
			mass: 1,
			instance_object: ".Particle",
			weight_gravity: 1
		};
		Scene.active.raw.particle_datas = [raw];
		var particle_refs: Array<TParticleReference> = [
			{
				name: "Particles",
				particle: "Particles",
				seed: 0
			}
		];

		{
			var t = new RenderTargetRaw();
			t.name = "texparticle";
			t.width = 0;
			t.height = 0;
			t.format = "R8";
			t.scale = arm.render.Inc.getSuperSampling();
			RenderPath.active.createRenderTarget(t);
		}

		for (mat in Scene.active.raw.material_datas) {
			if (mat.name == "Material2") {
				var m: TMaterialData = Json.parse(Json.stringify(mat));
				m.name = "MaterialParticle";
				Scene.active.raw.material_datas.push(m);
				break;
			}
		}

		iron.data.Data.getMaterial("Scene", "MaterialParticle", function(md: MaterialData) {
			UISidebar.inst.particleMaterial = md;

			for (obj in Scene.active.raw.objects) {
				if (obj.name == ".Sphere") {
					var particle: TObj = Json.parse(Json.stringify(obj));
					particle.name = ".Particle";
					particle.is_particle = true;
					particle.material_refs = ["MaterialParticle"];
					Scene.active.raw.objects.push(particle);
					for (i in 0...16) particle.transform.values[i] *= 0.01;
					break;
				}
			}

			Scene.active.spawnObject(".Sphere", null, function(o: Object) {
				var mo: MeshObject = cast o;
				mo.name = ".ParticleEmitter";
				mo.raw.particle_refs = particle_refs;
				#if arm_particles
				mo.setupParticleSystem("Scene", particle_refs[0]);
				#end
			});
		});
	}
}