/*
	GoToSocial
	Copyright (C) GoToSocial Authors admin@gotosocial.org
	SPDX-License-Identifier: AGPL-3.0-or-later

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Affero General Public License for more details.

	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

const Photoswipe = require("photoswipe/dist/umd/photoswipe.umd.min.js");
const PhotoswipeLightbox = require("photoswipe/dist/umd/photoswipe-lightbox.umd.min.js");
const PhotoswipeCaptionPlugin = require("photoswipe-dynamic-caption-plugin").default;
const Plyr = require("plyr");
const Prism = require("./prism.js");

Prism.manual = true;
Prism.highlightAll();

const reduceMotion = window.matchMedia('(prefers-reduced-motion: reduce)');

let [_, _user, type, id] = window.location.pathname.split("/");
if (type == "statuses") {
	let firstStatus = document.getElementsByClassName("thread")[0].children[0];
	if (firstStatus.id != id) {
		document.getElementById(id).scrollIntoView();
	}
}

const lightbox = new PhotoswipeLightbox({
	gallery: '.photoswipe-gallery',
	children: '.photoswipe-slide',
	pswpModule: Photoswipe,
	// Bit darker than default 0.8.
	bgOpacity: 0.9,
	loop: false,
});

new PhotoswipeCaptionPlugin(lightbox, {
	type: 'auto',
	captionContent(slide) {
		return slide.data.alt;
	}
});

lightbox.addFilter('itemData', (item) => {
	const el = item.element;
	if (
		el &&
		el.classList.contains("plyr-video") &&
		el._plyrContainer !== undefined
	) {
		const parentNode = el._plyrContainer.parentNode;
		const loopingAuto = el.classList.contains("gifv");
		return {
			alt: el.getAttribute("alt"),
			_video: {
				open(c) {
					c.appendChild(el._plyrContainer);
					if (loopingAuto) {
						// Start playing
						// when opened.
						el._player.play();
					}
				},
				close() {
					parentNode.appendChild(el._plyrContainer);
				},
				pause() {
					el._player.pause();
				},
				play() {
					el._player.play();
				}
			},
			width: parseInt(el.dataset.pswpWidth),
			height: parseInt(el.dataset.pswpHeight),
			parentStatus: el.dataset.pswpParentStatus,
			attachmentId: el.dataset.pswpAttachmentId,
			loopingAuto: loopingAuto,
		};
	}
	return item;
});

// Open video when user moves to its slide.
lightbox.on("contentActivate", (e) => {
	const { content } = e;
	if (content.data._video != undefined) {
		content.data._video.open(content.element);
	}
});

// Pause + close video when user
// moves away from its slide.
lightbox.on("contentDeactivate", (e) => {
	const { content } = e;
	if (content.data._video != undefined) {
		content.data._video.pause();
		content.data._video.close();
	}
});

// Pause video when lightbox is closed.
lightbox.on("closingAnimationStart", function () {
	if (lightbox.pswp.currSlide.data._video != undefined) {
		lightbox.pswp.currSlide.data._video.close();
	}
});
lightbox.on("close", function () {
	if (lightbox.pswp.currSlide.data._video != undefined &&
		!lightbox.pswp.currSlide.data.loopingAuto) {
		lightbox.pswp.currSlide.data._video.pause();
	}
});

// Open video when lightbox is opened.
lightbox.on("openingAnimationEnd", function () {
	if (lightbox.pswp.currSlide.data._video != undefined) {
		lightbox.pswp.currSlide.data._video.play();
	}
});

// Add "open this post" link to lightbox UI.
lightbox.on('uiRegister', function() {
	lightbox.pswp.ui.registerElement({
		name: 'open-post-link',
		ariaLabel: 'Open post',
		order: 8,
		isButton: true,
		tagName: "a",
		html: '<span title="Open post"><span class="sr-only">Open post</span><i class="fa fa-lg fa-external-link-square" aria-hidden="true"></i></span>',
		onInit: (el, pswp) => {
			el.setAttribute('target', '_blank');
			el.setAttribute('rel', 'noopener');
			pswp.on('change', () => {
				switch (true) {
					case pswp.currSlide.data.parentStatus !== undefined:
						// Link to parent status.
						el.href = pswp.currSlide.data.parentStatus;
						break;
					case pswp.currSlide.data.element !== undefined &&
						pswp.currSlide.data.element.dataset.pswpParentStatus !== undefined:
						// Link to parent status.
						el.href = pswp.currSlide.data.element.dataset.pswpParentStatus;
						break;
					default:
						// Link to profile.
						const location = window.location; 	
						el.href = "//" + location.host + location.pathname;
				}
			});
		}
	});
});

lightbox.init();

function dynamicSpoiler(className, updateFunc) {
	Array.from(document.getElementsByClassName(className)).forEach((spoiler) => {
		const update = updateFunc(spoiler);
		if (update) {
			update();
			spoiler.addEventListener("toggle", update);
		}
	});
}

dynamicSpoiler("text-spoiler", (details) => {
	const summary = details.children[0];
	const button = details.querySelector(".button");

	// Use button *instead of summary*
	// to toggle post visibility.
	summary.tabIndex = "-1";
	button.tabIndex = "0";
	button.setAttribute("aria-role", "button");
	button.onclick = (e) => {
		e.preventDefault();
		return details.hasAttribute("open")
			? details.removeAttribute("open")
			: details.setAttribute("open", "");
	};

	// Let enter also trigger the button
	// (for those using keyboard to navigate).
	button.addEventListener("keydown", (e) => {
		if (e.key === "Enter") {
			e.preventDefault();
			button.click();
		}
	});

	// Change button text depending on
	// whether spoiler is open or closed rn.
	return () => {
		button.textContent = details.open
			? "Show less"
			: "Show more";
	};
});

dynamicSpoiler("media-spoiler", (details) => {
	const summary = details.children[0];
	const button = details.querySelector(".eye.button");
	const video = details.querySelector(".plyr-video");
	const loopingAuto = !reduceMotion.matches && video != null && video.classList.contains("gifv");

	// Use button *instead of summary*
	// to toggle media visibility.
	summary.tabIndex = "-1";
	button.tabIndex = "0";
	button.setAttribute("aria-role", "button");
	button.onclick = (e) => {
		e.preventDefault();
		return details.hasAttribute("open")
			? details.removeAttribute("open")
			: details.setAttribute("open", "");
	};

	// Let enter also trigger the button
	// (for those using keyboard to navigate).
	button.addEventListener("keydown", (e) => {
		if (e.key === "Enter") {
			e.preventDefault();
			button.click();
		}
	});

	return () => {
		if (details.open) {
			button.setAttribute("aria-label", "Hide media");
		} else {
			button.setAttribute("aria-label", "Show media");
			if (video && !loopingAuto) {
				video.pause();
			}
		}
	};
});

Array.from(document.getElementsByClassName("plyr-video")).forEach((video) => {
	const loopingAuto = !reduceMotion.matches && video.classList.contains("gifv");
	let player = new Plyr(video, {
		title: video.title,
		settings: [],
		// Only show controls for video and audio,
		// not looping soundless gifv. Don't show
		// volume slider as it's unusable anyway
		// when the video is inside a lightbox,
		// mute toggle will have to be enough.
		controls: loopingAuto
			? []
			: [
				'play-large',   // The large play button in the center
				'restart',      // Restart playback
				'rewind',       // Rewind by the seek time (default 10 seconds)
				'play',         // Play/pause playback
				'fast-forward', // Fast forward by the seek time (default 10 seconds)
				'current-time', // The current time of playback
				'duration',     // The full duration of the media
				'mute',         // Toggle mute
				'fullscreen',   // Toggle fullscreen
			],
		tooltips: { controls: true, seek: true },
		iconUrl: "/assets/plyr.svg",
		invertTime: false,
		hideControls: false,
		listeners: {
			play: (_) => {
				if (!inLightbox(video)) {
					// If the video isn't open in the lightbox
					// as the current photoswipe slide, clicking
					// on it to play it opens it in the lightbox.
					lightbox.loadAndOpen(parseInt(video.dataset.pswpIndex), {
						gallery: video.closest(".photoswipe-gallery")
					});
				} else if (!loopingAuto) {
					// If the video *is* open in the lightbox,
					// and it's not a looping gifv, clicking
					// play just plays or pauses the video.
					player.togglePlay();
				}
				return false;
			},
		}
	});

	player.elements.container.title = video.title;
	video._player = player;
	video._plyrContainer = player.elements.container;
});

// Return true if the photoswipe lightbox is
// open with this element as the current slide.
function inLightbox(element) {
	if (lightbox.pswp === undefined) {
		return false;
	}

	if (lightbox.pswp.currSlide === undefined) {
		return false;
	}

	return element.dataset.pswpAttachmentId ===
		lightbox.pswp.currSlide.data.attachmentId;
}

// Define + reuse one DateTimeFormat (cheaper).
const dateTimeFormat = Intl.DateTimeFormat(
	undefined,
	{
		year: 'numeric',
		month: 'short',
		day: '2-digit',
		hour: '2-digit',
		minute: '2-digit',
		hour12: false
	},
);

// Reformat time text to browser locale.
Array.from(document.getElementsByTagName('time')).forEach(timeTag => {
	const datetime = timeTag.getAttribute('datetime');
	const currentText = timeTag.textContent.trim();
	// Only format if current text contains precise time.
	if (currentText.match(/\d{2}:\d{2}/)) {
		const date = new Date(datetime);
		timeTag.textContent = dateTimeFormat.format(date);
	}
});