package fr.username404.snowygui.utils

import com.mojang.blaze3d.systems.RenderSystem
import com.mojang.blaze3d.vertex.DefaultVertexFormat
import com.mojang.blaze3d.vertex.Tesselator
import com.mojang.blaze3d.vertex.VertexConsumer
import com.mojang.blaze3d.vertex.VertexFormat
import fr.username404.snowygui.gui.feature.Colors
import fr.username404.snowygui.gui.hextoRGB
import net.minecraft.client.renderer.GameRenderer

object RenderingUtil {
    @JvmField val tessellator: Tesselator = Tesselator.getInstance()
    @JvmStatic
    fun VertexConsumer.colorIt(color: Int, opacity: Float = 1F): VertexConsumer = hextoRGB(color).run {
        setColor(get(0), get(1), get(2), opacity)
    }
    fun colorShader() {
        RenderSystem.setShader(GameRenderer::getPositionColorShader)
        RenderSystem.setShaderColor(1F, 1F, 1F, 1F)
    }
    fun prepareDraw() {
        colorShader()
        RenderSystem.enableBlend()
        RenderSystem.defaultBlendFunc()
    }
    fun endDraw() {
        RenderSystem.disableBlend()
    }
    fun drawRectangle(
        x: Double, y: Double, height: Int, width: Int,
        color: Int = Colors.TRANSPARENT(), opacity: Float = 1F
    ): Unit = tessellator.begin(VertexFormat.Mode.QUADS, DefaultVertexFormat.POSITION_COLOR).run {
        fun VertexConsumer.colorEnd() = colorIt(color, opacity)
        val x = x.toFloat() ; val y = y.toFloat()
        addVertex(x, y + height, 0.0F).colorEnd()
        addVertex(x + width, y + height, 0.0F).colorEnd()
        addVertex(x + width, y, 0.0F).colorEnd()
        addVertex(x, y, 0.0F).colorEnd()
    }
}