import assert from 'node:assert/strict';
import test from 'node:test';

import { MediaController } from '../vr180player/media/media-controller.js';

function createClassList() {
	const classes = new Set();
	return {
		add: (className) => classes.add(className),
		contains: (className) => classes.has(className),
		remove: (className) => classes.delete(className)
	};
}

function createVideo(overrides = {}) {
	const video = {
		HAVE_ENOUGH_DATA: 4,
		controls: true,
		currentSrc: 'video.mp4',
		currentTime: 20,
		duration: 120,
		ended: false,
		loop: false,
		loadCount: 0,
		muted: false,
		pauseCount: 0,
		paused: true,
		playCount: 0,
		readyState: 4,
		volume: 1,
		load() {
			this.loadCount += 1;
		},
		pause() {
			this.pauseCount += 1;
			this.paused = true;
		},
		play() {
			this.playCount += 1;
			this.paused = false;
			this.ended = false;
			return Promise.resolve();
		},
		...overrides
	};

	return video;
}

function createController({
	is2DModeActive = () => false,
	on2DPlaybackResume = () => {},
	playButton = { classList: createClassList(), disabled: true },
	video = createVideo()
} = {}) {
	return {
		controller: new MediaController({
			is2DModeActive,
			on2DPlaybackResume,
			playButton,
			video
		}),
		playButton,
		video
	};
}

test('MediaController clamps skip controls to the video bounds', () => {
	const { controller, video } = createController();

	controller.forward();
	assert.equal(video.currentTime, 35);

	video.currentTime = 118;
	controller.forward();
	assert.equal(video.currentTime, 120);

	controller.rewind();
	assert.equal(video.currentTime, 105);

	video.currentTime = 4;
	controller.rewind();
	assert.equal(video.currentTime, 0);
});

test('MediaController seeks by progress and ignores videos without finite duration', () => {
	const { controller, video } = createController();

	controller.seekToProgress(0.25);
	assert.equal(video.currentTime, 30);

	video.duration = Number.POSITIVE_INFINITY;
	controller.seekToProgress(0.75);
	assert.equal(video.currentTime, 30);
});

test('MediaController toggles mute and native controls', () => {
	const { controller, video } = createController();

	controller.toggleMute();
	assert.equal(video.muted, true);

	controller.toggleMute();
	assert.equal(video.muted, false);

	video.controls = false;
	controller.enableNativeControls();
	assert.equal(video.controls, true);
});

test('MediaController toggles loop playback state', () => {
	const { controller, video } = createController();

	assert.equal(controller.isLooping(), false);
	assert.equal(controller.toggleLoop(), true);
	assert.equal(video.loop, true);
	assert.equal(controller.isLooping(), true);
	assert.equal(controller.toggleLoop(), false);
	assert.equal(video.loop, false);
});

test('MediaController resets video and play button to poster state', () => {
	const playButton = { classList: createClassList(), disabled: true };
	playButton.classList.add('hidden');
	const { controller, video } = createController({ playButton });

	controller.resetToOriginalState();

	assert.equal(video.pauseCount, 1);
	assert.equal(video.currentTime, 0);
	assert.equal(video.controls, false);
	assert.equal(video.loadCount, 1);
	assert.equal(playButton.classList.contains('hidden'), false);
	assert.equal(playButton.disabled, false);
});

test('MediaController restarts ended video before playing again', async () => {
	let resumed = false;
	const { controller, video } = createController({
		is2DModeActive: () => true,
		on2DPlaybackResume: () => {
			resumed = true;
		},
		video: createVideo({ currentTime: 120, ended: true, paused: true })
	});

	controller.togglePlayPause();
	await Promise.resolve();

	assert.equal(video.currentTime, 0);
	assert.equal(video.playCount, 1);
	assert.equal(resumed, true);

	const vrVideo = createVideo({ currentTime: 120, ended: true, paused: true });
	const { controller: vrController } = createController({ video: vrVideo });

	vrController.togglePlayPause();
	await Promise.resolve();

	assert.equal(vrVideo.currentTime, 0);
	assert.equal(vrVideo.playCount, 1);
});

test('MediaController pauses when toggling playback while already playing', () => {
	const { controller, video } = createController({
		video: createVideo({ paused: false })
	});

	controller.togglePlayPause();

	assert.equal(video.pauseCount, 1);
	assert.equal(video.paused, true);
});

test('MediaController dispatches ended behavior for VR, 2D, and idle modes', () => {
	const vrCalls = [];
	const { controller } = createController({
		video: createVideo({ paused: false })
	});

	controller.handleEnded({
		isIn2DMode: () => false,
		isInVr: () => true,
		on2DEnded: () => vrCalls.push('2d'),
		onVrEnded: () => vrCalls.push('vr'),
		resetToOriginalState: () => vrCalls.push('reset')
	});
	assert.deepEqual(vrCalls, ['vr']);

	const twoDCalls = [];
	controller.handleEnded({
		isIn2DMode: () => true,
		isInVr: () => false,
		on2DEnded: () => twoDCalls.push('2d'),
		onVrEnded: () => twoDCalls.push('vr'),
		resetToOriginalState: () => twoDCalls.push('reset')
	});
	assert.deepEqual(twoDCalls, ['2d']);

	const idleCalls = [];
	controller.handleEnded({
		isIn2DMode: () => false,
		isInVr: () => false,
		on2DEnded: () => idleCalls.push('2d'),
		onVrEnded: () => idleCalls.push('vr'),
		resetToOriginalState: () => idleCalls.push('reset')
	});
	assert.deepEqual(idleCalls, ['reset']);
});