package gay.pizza.CavesOfJolk

import com.badlogic.gdx.ApplicationAdapter
import com.badlogic.gdx.Gdx
import com.badlogic.gdx.audio.Sound
import com.badlogic.gdx.graphics.*
import com.badlogic.gdx.graphics.g2d.BitmapFont
import com.badlogic.gdx.graphics.g2d.SpriteBatch
import com.badlogic.gdx.graphics.g3d.*
import com.badlogic.gdx.graphics.g3d.attributes.ColorAttribute
import com.badlogic.gdx.graphics.g3d.attributes.FloatAttribute
import com.badlogic.gdx.graphics.g3d.attributes.IntAttribute
import com.badlogic.gdx.graphics.g3d.attributes.TextureAttribute
import com.badlogic.gdx.graphics.g3d.environment.DirectionalLight
import com.badlogic.gdx.graphics.g3d.shaders.DefaultShader
import com.badlogic.gdx.graphics.g3d.utils.DefaultShaderProvider
import com.badlogic.gdx.graphics.g3d.utils.ModelBuilder
import com.badlogic.gdx.graphics.g3d.utils.TextureDescriptor
import com.badlogic.gdx.math.*
import com.badlogic.gdx.utils.ScreenUtils
import gay.pizza.CavesOfJolk.Resources.Companion.assetManager

class Game: ApplicationAdapter()
{
	private lateinit var texJolk: Texture
	private lateinit var fntComic: BitmapFont
	private lateinit var nut: Sound
	private lateinit var cube: Model
	private lateinit var floor: Model

	private lateinit var spriteBatch: SpriteBatch
	private lateinit var modelBatch: ModelBatch
	private lateinit var env: Environment

	private lateinit var colin: Colin
	private var jolkRot = 0.0f

	private lateinit var cubeInstance: ModelInstance
	private lateinit var floorInstance: ModelInstance
	private lateinit var suzanneInstance: ModelInstance

	private fun makeCube(texture: Texture): Model
	{
		val modelBuilder = ModelBuilder()
		val size = 2.0f
		val material = Material(
			ColorAttribute.createDiffuse(XnaColor.White),
			TextureAttribute(TextureAttribute.Diffuse,
				TextureDescriptor(texture,
					Texture.TextureFilter.Linear,
					Texture.TextureFilter.Linear,
					Texture.TextureWrap.ClampToEdge,
					Texture.TextureWrap.ClampToEdge)),
			ColorAttribute.createSpecular(XnaColor.Gray),
			FloatAttribute.createShininess(20.0f))
		val attribs = VertexAttributes.Usage.Position or VertexAttributes.Usage.TextureCoordinates or VertexAttributes.Usage.Normal
		return modelBuilder.createBox(size, size, size, material, attribs.toLong())
	}

	private fun makeFloor(texture: Texture): Model
	{
		val modelBuilder = ModelBuilder()
		val material = Material(
			ColorAttribute.createDiffuse(XnaColor.BlanchedAlmond.lighten(0.01)),
			ColorAttribute.createSpecular(XnaColor.BlanchedAlmond.mix(XnaColor.Black, 0.4f)),
			FloatAttribute.createShininess(65.0f),
			TextureAttribute.createDiffuse(texture))
		val attribs = VertexAttributes.Usage.Position or VertexAttributes.Usage.TextureCoordinates or VertexAttributes.Usage.Normal
		val size = 10.0f
		return modelBuilder.createRect(
			0.0f, 0.0f, 0.0f,
			size, 0.0f, 0.0f,
			size, 0.0f, -size,
			0.0f, 0.0f, -size,
			0.0f, 1.0f, 0.0f,
			material, attribs.toLong())
	}

	override fun create()
	{
		Resources.instance.loadAssets()
		assetManager.finishLoading()

		texJolk = assetManager.get("jolkmeup.jpg")
		fntComic = assetManager.get("Comic Sans MS.ttf")
		val suzanne = assetManager.get("suzanne.g3db", Model::class.java)

		// Override ridiculous shininess because i cbf to fix the model
		for (i in suzanne.materials)
			i.set(FloatAttribute.createShininess(30.0f))

		cube = makeCube(texJolk)
		floor = makeFloor(assetManager.get("cobblestone.png"))

		spriteBatch = SpriteBatch()

		env = Environment()
		env.set(IntAttribute.createCullFace(GL20.GL_BACK))
		env.set(ColorAttribute.createAmbientLight(XnaColor.DarkSlateGray.lighten(-0.6)))
		env.set(ColorAttribute.createFog(XnaColor.CornflowerBlue))
		env.add(DirectionalLight().set(XnaColor.White, Vector3(1.0f, -1.0f, -1.0f).nor()))

		val shaderConfig = DefaultShader.Config(
			Gdx.files.internal("lit.vert.glsl").readString(),
			Gdx.files.internal("lit.frag.glsl").readString())
		shaderConfig.numDirectionalLights = 1
		shaderConfig.numPointLights = 0
		shaderConfig.numBones = 0
		modelBatch = ModelBatch(DefaultShaderProvider(shaderConfig))

		colin = Colin()

		cubeInstance = ModelInstance(cube)
		floorInstance = ModelInstance(floor)
		suzanneInstance = ModelInstance(suzanne)
		suzanneInstance.transform = Matrix4().translate(3.0f, 1.0f, -3.5f)
	}

	private fun update(deltaTime: Float)
	{
		colin.update(deltaTime)

		jolkRot += 15.0f * deltaTime
	}

	override fun render()
	{
		val deltaTime = Gdx.graphics.deltaTime
		update(deltaTime)

		val fogColour = XnaColor.CornflowerBlue.lighten(Math.sin(0.056 * jolkRot.toDouble()) * 0.15 - 0.15)
		ScreenUtils.clear(fogColour, true)
		env.set(ColorAttribute.createFog(fogColour))

		val jolkPos = Vector3(0.0f, 1.0f + MathUtils.sin(jolkRot * 0.25f) * 0.25f, -4.0f)
		val world = Matrix4()
			.setTranslation(jolkPos)
			.rotateRad(1.0f, 0.0f, 0.0f, jolkRot * 0.25f)
			.rotate(0.0f, 1.0f, 0.0f, jolkRot)
			.scale(0.25f, 0.25f, 0.25f)
		cubeInstance.transform = world

		modelBatch.begin(colin.camera)
		modelBatch.render(floorInstance, env)
		modelBatch.render(cubeInstance, env)
		modelBatch.render(suzanneInstance, env)
		modelBatch.end()

		spriteBatch.begin()
		colin.draw(spriteBatch)
		val textPos = colin.camera.project(jolkPos)
		if (textPos.z < 1.0)
			fntComic.draw(spriteBatch, "I am filled with jolk", textPos.x, textPos.y)
		fntComic.draw(spriteBatch, "${colin.position.x}\n${colin.position.y}", 10.0f, Gdx.graphics.height - 10.0f)
		spriteBatch.end()
	}

	override fun dispose()
	{
		floor.dispose()
		cube.dispose()
		modelBatch.dispose()
		spriteBatch.dispose()
		assetManager.dispose()
	}
}