package at.hannibal2.skyhanni.utils.renderables

import at.hannibal2.skyhanni.utils.RenderUtils.HorizontalAlignment
import at.hannibal2.skyhanni.utils.RenderUtils.VerticalAlignment
import net.minecraft.client.renderer.GlStateManager

internal object RenderableUtils {

    private fun calculateAlignmentXOffset(renderable: Renderable, xSpace: Int) = when (renderable.horizontalAlign) {
        HorizontalAlignment.LEFT -> 0
        HorizontalAlignment.CENTER -> (xSpace - renderable.width) / 2
        HorizontalAlignment.RIGHT -> xSpace - renderable.width
    }

    private fun calculateAlignmentYOffset(renderable: Renderable, ySpace: Int) = when (renderable.verticalAlign) {
        VerticalAlignment.TOP -> 0
        VerticalAlignment.CENTER -> (ySpace - renderable.height) / 2
        VerticalAlignment.BOTTOM -> ySpace - renderable.height
    }

    fun Renderable.renderXYAligned(posX: Int, posY: Int, xSpace: Int, ySpace: Int) {
        val xOffset = calculateAlignmentXOffset(this, xSpace)
        val yOffset = calculateAlignmentYOffset(this, ySpace)
        GlStateManager.translate(xOffset.toFloat(), yOffset.toFloat(), 0f)
        this.render(posX + xOffset, posY + yOffset)
        GlStateManager.translate(-xOffset.toFloat(), -yOffset.toFloat(), 0f)
    }

    fun Renderable.renderXAligned(posX: Int, posY: Int, xSpace: Int) {
        val xOffset = calculateAlignmentXOffset(this, xSpace)
        GlStateManager.translate(xOffset.toFloat(), 0f, 0f)
        this.render(posX + xOffset, posY)
        GlStateManager.translate(-xOffset.toFloat(), 0f, 0f)
    }

    fun Renderable.renderYAligned(posX: Int, posY: Int, ySpace: Int) {
        val yOffset = calculateAlignmentYOffset(this, ySpace)
        GlStateManager.translate(0f, yOffset.toFloat(), 0f)
        this.render(posX, posY + yOffset)
        GlStateManager.translate(0f, -yOffset.toFloat(), 0f)
    }

}