package com.mojang.blaze3d.platform;

import com.google.common.collect.Lists;
import java.util.List;
import java.util.Locale;
import java.util.Optional;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import org.lwjgl.glfw.GLFW;
import org.lwjgl.glfw.GLFWVidMode;
import org.lwjgl.glfw.GLFWVidMode.Buffer;

@Environment(EnvType.CLIENT)
public final class Monitor {
	private final long monitor;
	private final List<VideoMode> videoModes;
	private VideoMode currentMode;
	private int x;
	private int y;

	public Monitor(final long monitor) {
		this.monitor = monitor;
		this.videoModes = Lists.<VideoMode>newArrayList();
		this.refreshVideoModes();
	}

	public void refreshVideoModes() {
		this.videoModes.clear();
		Buffer modes = GLFW.glfwGetVideoModes(this.monitor);

		for (int i = modes.limit() - 1; i >= 0; i--) {
			modes.position(i);
			VideoMode mode = new VideoMode(modes);
			if (mode.getRedBits() >= 8 && mode.getGreenBits() >= 8 && mode.getBlueBits() >= 8) {
				this.videoModes.add(mode);
			}
		}

		int[] x = new int[1];
		int[] y = new int[1];
		GLFW.glfwGetMonitorPos(this.monitor, x, y);
		this.x = x[0];
		this.y = y[0];
		GLFWVidMode mode = GLFW.glfwGetVideoMode(this.monitor);
		this.currentMode = new VideoMode(mode);
	}

	public VideoMode getPreferredVidMode(final Optional<VideoMode> expectedMode) {
		if (expectedMode.isPresent()) {
			VideoMode videoMode = (VideoMode)expectedMode.get();

			for (VideoMode mode : this.videoModes) {
				if (mode.equals(videoMode)) {
					return mode;
				}
			}
		}

		return this.getCurrentMode();
	}

	public int getVideoModeIndex(final VideoMode videoMode) {
		return this.videoModes.indexOf(videoMode);
	}

	public VideoMode getCurrentMode() {
		return this.currentMode;
	}

	public int getX() {
		return this.x;
	}

	public int getY() {
		return this.y;
	}

	public VideoMode getMode(final int mode) {
		return (VideoMode)this.videoModes.get(mode);
	}

	public int getModeCount() {
		return this.videoModes.size();
	}

	public long getMonitor() {
		return this.monitor;
	}

	public String toString() {
		return String.format(Locale.ROOT, "Monitor[%s %sx%s %s]", this.monitor, this.x, this.y, this.currentMode);
	}
}