/**
 * FP Genocide Maps — front-end behavior.
 *
 * - Exclusive accordion with one map always open (700 ms slide, Divi's
 *   default speed); opening a map swaps the image with a fade.
 * - Clicking the map image opens it in a lightbox with a share button.
 * - Each map has a shareable URL (#map-<slug>): visiting it opens that map
 *   and scrolls the section into view.
 */
(function () {
	'use strict';

	var DURATION = 700;
	var HASH_PREFIX = '#map-';

	function slideDown(el) {
		el.classList.add('geep-animating');
		el.style.overflow = 'hidden';
		el.style.height = '0px';
		var target = el.scrollHeight;
		el.style.transition = 'height ' + DURATION + 'ms ease-in-out';
		requestAnimationFrame(function () {
			el.style.height = target + 'px';
		});
		window.setTimeout(function () {
			el.style.transition = '';
			el.style.height = '';
			el.style.overflow = '';
			el.classList.remove('geep-animating');
		}, DURATION);
	}

	function slideUp(el, done) {
		el.classList.add('geep-animating');
		el.style.overflow = 'hidden';
		el.style.height = el.scrollHeight + 'px';
		el.style.transition = 'height ' + DURATION + 'ms ease-in-out';
		requestAnimationFrame(function () {
			el.style.height = '0px';
		});
		window.setTimeout(function () {
			el.style.transition = '';
			el.style.height = '';
			el.style.overflow = '';
			el.classList.remove('geep-animating');
			done();
		}, DURATION);
	}

	function init(root) {
		var labels;
		try {
			labels = JSON.parse(root.getAttribute('data-labels') || '{}');
		} catch (e) {
			labels = {};
		}
		var images = root.querySelectorAll('.geep-map-img');
		// The first map is rendered open by the shortcode.
		var current = root.querySelector('.geep-toggle--open');

		function showMap(key) {
			// No fallback: a map without its own image leaves the gap empty.
			var target = null;
			if (key) {
				images.forEach(function (img) {
					if (img.getAttribute('data-map') === key) {
						target = img;
					}
				});
			}
			images.forEach(function (img) {
				if (img !== target) {
					img.classList.remove('is-active', 'is-shown');
				}
			});
			if (target && !target.classList.contains('is-active')) {
				target.classList.add('is-active');
				requestAnimationFrame(function () {
					requestAnimationFrame(function () {
						target.classList.add('is-shown');
					});
				});
			}
		}

		function close(toggle) {
			var content = toggle.querySelector('.geep-toggle-content');
			toggle.classList.remove('geep-toggle--open');
			slideUp(content, function () {
				toggle.classList.add('geep-toggle--close');
			});
		}

		function open(toggle) {
			var content = toggle.querySelector('.geep-toggle-content');
			toggle.classList.remove('geep-toggle--close');
			toggle.classList.add('geep-toggle--open');
			slideDown(content);
		}

		function select(toggle) {
			if (toggle === current) {
				return;
			}
			if (current) {
				close(current);
			}
			open(toggle);
			current = toggle;
			showMap(toggle.getAttribute('data-map'));
		}

		root.querySelectorAll('.geep-toggle').forEach(function (toggle) {
			var title = toggle.querySelector('.geep-toggle-title');
			var content = toggle.querySelector('.geep-toggle-content');
			if (!title || !content) {
				return;
			}
			title.addEventListener('click', function () {
				if (content.classList.contains('geep-animating')) {
					return;
				}
				select(toggle);
			});
		});

		/* ------------------------------------------------------------------
		 * Shareable URLs: #map-<slug> selects that map on page load.
		 * ---------------------------------------------------------------- */

		function openFromHash() {
			if (window.location.hash.indexOf(HASH_PREFIX) !== 0) {
				return;
			}
			var slug = decodeURIComponent(window.location.hash.slice(HASH_PREFIX.length));
			var target = null;
			root.querySelectorAll('.geep-toggle').forEach(function (t) {
				if (t.getAttribute('data-slug') === slug) {
					target = t;
				}
			});
			if (!target || target === current) {
				if (target) {
					root.scrollIntoView({ behavior: 'smooth', block: 'center' });
				}
				return;
			}
			// Switch instantly (no slide) — the page is just loading.
			if (current) {
				current.classList.remove('geep-toggle--open');
				current.classList.add('geep-toggle--close');
			}
			target.classList.remove('geep-toggle--close');
			target.classList.add('geep-toggle--open');
			current = target;
			showMap(target.getAttribute('data-map'));
			root.scrollIntoView({ behavior: 'smooth', block: 'center' });
		}

		openFromHash();
		window.addEventListener('hashchange', openFromHash);

		/* ------------------------------------------------------------------
		 * Lightbox with share button.
		 * ---------------------------------------------------------------- */

		var lightbox = null;
		var toastTimer = null;

		function buildLightbox() {
			var lb = document.createElement('div');
			lb.className = 'geep-lightbox';
			lb.setAttribute('role', 'dialog');
			lb.setAttribute('aria-modal', 'true');
			lb.innerHTML =
				'<div class="geep-lightbox-backdrop"></div>' +
				'<figure class="geep-lightbox-inner">' +
					'<div class="geep-lightbox-actions">' +
						'<button type="button" class="geep-lightbox-btn geep-lightbox-share">' +
							'<svg width="15" height="15" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><rect x="9" y="9" width="11" height="11" rx="2"/><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/></svg>' +
							'<span>' + (labels.copy || 'Copy map URL') + '</span>' +
						'</button>' +
						'<button type="button" class="geep-lightbox-btn geep-lightbox-close" aria-label="' + (labels.close || 'Close') + '">&#215;</button>' +
					'</div>' +
					'<img class="geep-lightbox-img" alt="">' +
					'<div class="geep-lightbox-toast" hidden>' + (labels.copied || 'Link copied!') + '</div>' +
				'</figure>';
			document.body.appendChild(lb);

			lb.querySelector('.geep-lightbox-backdrop').addEventListener('click', closeLightbox);
			lb.querySelector('.geep-lightbox-close').addEventListener('click', closeLightbox);
			lb.querySelector('.geep-lightbox-share').addEventListener('click', share);
			return lb;
		}

		function openLightbox() {
			var active = root.querySelector('.geep-map-img.is-active');
			if (!active) {
				return;
			}
			if (!lightbox) {
				lightbox = buildLightbox();
			}
			var img = lightbox.querySelector('.geep-lightbox-img');
			var key = active.getAttribute('data-map');
			var full = active.src; // src attribute holds the full-size file.

			// Show instantly whatever variant the page already downloaded for
			// this map (it is in cache), instead of leaving the previous map
			// on screen while the big file downloads.
			img.dataset.map = key;
			img.src = active.currentSrc || full;
			img.alt = current ? current.querySelector('.geep-toggle-title').textContent : '';

			// Then upgrade to the full-size file in the background.
			if (img.src !== full) {
				var pre = new Image();
				pre.onload = function () {
					// Only swap if the lightbox still shows this same map.
					if (lightbox.classList.contains('is-open') && img.dataset.map === key) {
						img.src = full;
					}
				};
				pre.src = full;
			}

			lightbox.classList.add('is-open');
			document.documentElement.classList.add('geep-lightbox-noscroll');
			document.addEventListener('keydown', onKeydown);
		}

		function closeLightbox() {
			if (!lightbox) {
				return;
			}
			lightbox.classList.remove('is-open');
			document.documentElement.classList.remove('geep-lightbox-noscroll');
			document.removeEventListener('keydown', onKeydown);
		}

		function onKeydown(e) {
			if (e.key === 'Escape') {
				closeLightbox();
			}
		}

		function toast() {
			var t = lightbox.querySelector('.geep-lightbox-toast');
			t.hidden = false;
			window.clearTimeout(toastTimer);
			toastTimer = window.setTimeout(function () {
				t.hidden = true;
			}, 2200);
		}

		function share() {
			// Copy the full-size image URL of the map currently on screen.
			var active = root.querySelector('.geep-map-img.is-active');
			if (!active) {
				return;
			}
			var url = active.src; // src attribute holds the full-size file.
			if (navigator.clipboard && navigator.clipboard.writeText) {
				navigator.clipboard.writeText(url).then(toast, function () {
					fallbackCopy(url);
				});
			} else {
				fallbackCopy(url);
			}
		}

		function fallbackCopy(url) {
			var ta = document.createElement('textarea');
			ta.value = url;
			ta.style.position = 'fixed';
			ta.style.opacity = '0';
			document.body.appendChild(ta);
			ta.select();
			try {
				document.execCommand('copy');
				toast();
			} catch (e) {}
			document.body.removeChild(ta);
		}

		var wrap = root.querySelector('.geep-maps-image-wrap');
		if (wrap) {
			wrap.addEventListener('click', openLightbox);
			wrap.addEventListener('keydown', function (e) {
				if (e.key === 'Enter' || e.key === ' ') {
					e.preventDefault();
					openLightbox();
				}
			});
		}
	}

	function ready(fn) {
		if (document.readyState !== 'loading') {
			fn();
		} else {
			document.addEventListener('DOMContentLoaded', fn);
		}
	}

	ready(function () {
		document.querySelectorAll('.geep-maps').forEach(init);
	});
})();