/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.tests.conformance;

import java.util.Arrays;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Graphics.DisplayMode;
import com.badlogic.gdx.tests.utils.GdxTest;

public class DisplayModeTest extends GdxTest {

	@Override
	public void create () {
		DisplayMode displayMode = Gdx.graphics.getDisplayMode();
		DisplayMode displayModeForMonitor = Gdx.graphics.getDisplayMode(Gdx.graphics.getMonitor());
		DisplayMode[] displayModes = Gdx.graphics.getDisplayModes();
		DisplayMode[] displayModesForMonitor = Gdx.graphics.getDisplayModes(Gdx.graphics.getMonitor());

		Gdx.app.log("DisplayModeTest", "Display mode (using Gdx.graphics.getDisplayMode() ) : " + displayMode);
		Gdx.app.log("DisplayModeTest",
			"Display mode (using Gdx.graphics.getDisplayMode(Gdx.graphics.getMonitor()) ) : " + Arrays.toString(displayModes));
		Gdx.app.log("DisplayModeTest",
			"Display mode (using Gdx.graphics.getDisplayModes() ) : " + Arrays.toString(displayModesForMonitor));
		Gdx.app.log("DisplayModeTest",
			"Display mode (using Gdx.graphics.getDisplayModes(Gdx.graphics.getMonitor()) ): " + displayModeForMonitor);
		assertDisplayModeEquals(displayMode, displayModeForMonitor);
		assertDisplayModesEquals(displayModes, displayModesForMonitor);
	}

	void assertDisplayModesEquals (DisplayMode[] a, DisplayMode[] b) {
		if (a.length == 0 || b.length == 0) throw new AssertionError("Argument a or b can't be a zero length array");
		if (a.length != b.length) {
			throw new AssertionError("Display modes " + Arrays.toString(a) + " aren't equal to display modes " + Arrays.toString(b));
		}
		boolean equal = true;
		for (int i = 0; i < a.length; i++) {
			equal = equal && isDisplayModeEqual(a[i], b[i]);
		}
		if (!equal) {
			throw new AssertionError("Display modes " + Arrays.toString(a) + " aren't equal to display modes " + Arrays.toString(b));
		}
	}

	void assertDisplayModeEquals (DisplayMode a, DisplayMode b) {
		if (!isDisplayModeEqual(a, b)) {
			throw new AssertionError(a + " isn't equal to " + b);
		}
	}

	boolean isDisplayModeEqual (DisplayMode a, DisplayMode b) {
		if (a == null || b == null) return false;
		boolean equal = a.bitsPerPixel == b.bitsPerPixel && a.height == b.height && a.refreshRate == b.refreshRate
			&& a.width == b.width;
		return equal;
	}

}