/**
 * PRAutoBlogger admin JavaScript.
 *
 * Handles: tab switching, "Generate Now" with pipeline progress stages,
 * "Test Connections" with spinner, review queue actions, save feedback.
 * Uses vanilla jQuery (WordPress admin already loads it).
 *
 * @see admin/class-admin-page.php — Localizes prautobloggerAdmin object.
 */
(function ($) {
	'use strict';

	var config = window.prautobloggerAdmin || {};

	/*
	 * ── Settings page: tab switching ───────────────────────────────────
	 * Switches tabs client-side without page reload. Updates URL hash
	 * so the browser back button works and refreshes keep the active tab.
	 */
	$(document).on('click', '.ab-tab', function (e) {
		e.preventDefault();
		var tab = $(this).data('tab');
		if (!tab) return;

		// Switch tab nav
		$('.ab-tab').removeClass('ab-tab-active').attr('aria-selected', 'false');
		$(this).addClass('ab-tab-active').attr('aria-selected', 'true');

		// Switch panel
		$('.ab-panel').removeClass('ab-panel-active');
		$('.ab-panel[data-tab="' + tab + '"]').addClass('ab-panel-active');

		// Update URL without reload
		if (window.history.replaceState) {
			var url = new URL(window.location);
			url.searchParams.set('tab', tab);
			window.history.replaceState({}, '', url);
		}

		// Update the _wp_http_referer so WordPress redirects back to this tab after save.
		var $referer = $('#ab-settings-form input[name="_wp_http_referer"]');
		if ($referer.length) {
			var refUrl = new URL($referer.val(), window.location.origin);
			refUrl.searchParams.set('tab', tab);
			$referer.val(refUrl.pathname + refUrl.search);
		}
	});

	/*
	 * ── Save Settings feedback ─────────────────────────────────────────
	 * Shows "Saving…" on submit, auto-hides success notice after a delay.
	 */
	$(document).on('submit', '#ab-settings-form', function () {
		var $btn = $(this).find('input[type="submit"]');
		$btn.val('Saving…').prop('disabled', true);
	});

	// Auto-dismiss save notice after 6 seconds.
	$(function () {
		var $notice = $('#ab-save-notice');
		if ($notice.length) {
			setTimeout(function () {
				$notice.fadeOut(400, function () { $(this).remove(); });
			}, 6000);
		}

		// On load, sync _wp_http_referer with the current tab so the first
		// save without switching tabs still returns to the right place.
		var currentTab = new URL(window.location).searchParams.get('tab');
		if (currentTab) {
			var $referer = $('#ab-settings-form input[name="_wp_http_referer"]');
			if ($referer.length) {
				var refUrl = new URL($referer.val(), window.location.origin);
				refUrl.searchParams.set('tab', currentTab);
				$referer.val(refUrl.pathname + refUrl.search);
			}
		}

		// Resume polling if a generation is already running (e.g., user
		// navigated away and came back, or opened a new tab mid-generation).
		var $genBtn = $('#prautoblogger-generate-now');
		if ($genBtn.length && config.ajaxUrl) {
			$.ajax({
				url: config.ajaxUrl,
				method: 'POST',
				data: { action: 'prautoblogger_generation_status', nonce: config.generateNonce },
				timeout: 10000,
				success: function (response) {
					if (response.success && response.data && response.data.status === 'running') {
						setButtonLoading($genBtn, config.generatingText || 'Generating…');
						showProgress(response.data.stage || 'Generation in progress…');
						pollGenerationStatus($genBtn);
					}
				}
			});
		}
	});

	/*
	 * ── Helpers ─────────────────────────────────────────────────────────
	 */

	/**
	 * Show a status message in the admin page.
	 *
	 * @param {string} message Text to display.
	 * @param {string} type    'success' or 'error'.
	 */
	function showStatus(message, type) {
		var $el = $('#prautoblogger-status-message');
		$el.removeClass('hidden error')
			.text(message);
		if (type === 'error') {
			$el.addClass('error');
		}
		hideProgress();
	}

	/**
	 * Show a progress stage message with spinner.
	 *
	 * @param {string} message The stage text to display.
	 */
	function showProgress(message) {
		var $el = $('#prautoblogger-progress-stage');
		$el.html(
			'<span class="dashicons dashicons-update"></span>' +
			'<span>' + message + '</span>'
		).show();
		// Hide the status message while progress is shown.
		$('#prautoblogger-status-message').addClass('hidden');
	}

	/** Hide the progress stage message. */
	function hideProgress() {
		$('#prautoblogger-progress-stage').hide();
	}

	/**
	 * Set a button into loading state with spinner.
	 *
	 * @param {jQuery}  $btn  The button element.
	 * @param {string}  text  The loading text to show.
	 */
	function setButtonLoading($btn, text) {
		$btn.addClass('ab-btn-loading')
			.prop('disabled', true);
		$btn.find('.ab-btn-label').text(text);
	}

	/**
	 * Reset a button back to its default state.
	 *
	 * @param {jQuery}  $btn  The button element.
	 * @param {string}  text  The default text to restore.
	 */
	function resetButton($btn, text) {
		$btn.removeClass('ab-btn-loading')
			.prop('disabled', false);
		$btn.find('.ab-btn-label').text(text);
	}

	/*
	 * ── Generate Now ───────────────────────────────────────────────────
	 * Shows pipeline stages while the request is in-flight so the user
	 * knows it hasn't hung.
	 */
	/*
	 * Pipeline stages are now reported by the server via the status polling
	 * endpoint. The old client-side fake timers have been removed.
	 */

	/** Poll interval handle for generation status checks. */
	var statusPollTimer = null;

	/**
	 * Poll the generation status endpoint until the run finishes.
	 * Updates the progress UI and resolves the button state on completion.
	 *
	 * @param {jQuery} $btn The Generate Now button.
	 */
	function pollGenerationStatus($btn) {
		statusPollTimer = setInterval(function () {
			$.ajax({
				url: config.ajaxUrl,
				method: 'POST',
				data: {
					action: 'prautoblogger_generation_status',
					nonce: config.generateNonce
				},
				timeout: 15000,
				success: function (response) {
					if (!response.success) return;
					var d = response.data;

					if (d.status === 'running') {
						showProgress(d.stage || 'Generating…');
						return; // Keep polling.
					}

					// Terminal state — stop polling.
					clearInterval(statusPollTimer);
					statusPollTimer = null;
					hideProgress();
					resetButton($btn, config.generateText || 'Generate Now');

					if (d.status === 'complete') {
						showStatus(
							'Generation complete: ' + d.generated + ' generated, ' +
							d.published + ' published, ' + d.rejected + ' rejected. ' +
							'Cost: $' + parseFloat(d.cost).toFixed(4),
							'success'
						);
					} else if (d.status === 'error') {
						showStatus(
							'Generation failed: ' + (d.message || 'Unknown error'),
							'error'
						);
					} else {
						// idle or unknown — generation may have finished before
						// polling started. Reset the button cleanly.
						hideProgress();
					}
				},
				error: function () {
					// Network blip — keep polling, don't bail on transient errors.
				}
			});
		}, 5000); // Poll every 5 seconds.
	}

	$(document).on('click', '#prautoblogger-generate-now', function () {
		var $btn = $(this);
		if ($btn.prop('disabled')) return;

		setButtonLoading($btn, config.generatingText || 'Generating…');
		showProgress('Starting generation…');

		$.ajax({
			url: config.ajaxUrl,
			method: 'POST',
			data: {
				action: 'prautoblogger_generate_now',
				nonce: config.generateNonce,
				force: '1' // Always clear stale locks on manual runs.
			},
			timeout: 30000, // 30s is plenty — this just schedules the cron.
			success: function (response) {
				if (response.success) {
					// Generation kicked off in background — start polling.
					showProgress(response.data.message || 'Generation started…');
					pollGenerationStatus($btn);
				} else {
					showStatus(
						'Generation failed: ' + (response.data && response.data.message || 'Unknown error'),
						'error'
					);
					hideProgress();
					resetButton($btn, config.generateText || 'Generate Now');
				}
			},
			error: function (xhr, status) {
				showStatus(
					'Request failed: ' + status + '. Check server error logs.',
					'error'
				);
				hideProgress();
				resetButton($btn, config.generateText || 'Generate Now');
			}
		});
	});

	/*
	 * ── Test Connections ───────────────────────────────────────────────
	 */
	$(document).on('click', '#prautoblogger-test-connection', function () {
		var $btn = $(this);
		if ($btn.prop('disabled')) return;

		setButtonLoading($btn, config.testingText || 'Testing…');
		showProgress('Testing API connections…');

		$.ajax({
			url: config.ajaxUrl,
			method: 'POST',
			data: {
				action: 'prautoblogger_test_connection',
				nonce: config.testNonce,
				service: 'all'
			},
			timeout: 30000,
			success: function (response) {
				if (response.success) {
					var messages = [];
					var hasError = false;
					$.each(response.data, function (service, result) {
						messages.push(service + ': ' + result.message);
						if (result.status === 'error') hasError = true;
					});
					showStatus(messages.join(' | '), hasError ? 'error' : 'success');
				} else {
					showStatus('Connection test failed.', 'error');
				}
			},
			error: function () {
				showStatus('Connection test request failed.', 'error');
			},
			complete: function () {
				resetButton($btn, config.testText || 'Test Connections');
			}
		});
	});

	/*
	 * Review Queue — inline approve/reject via AJAX.
	 * Removes the row on success so the user sees immediate feedback.
	 */

	/**
	 * Show a status message on the review queue page.
	 *
	 * @param {string} message Text to display.
	 * @param {string} type    'success' or 'error'.
	 */
	function showQueueStatus(message, type) {
		var $el = $('#prautoblogger-queue-status');
		$el.removeClass('hidden error').text(message);
		if (type === 'error') {
			$el.addClass('error');
		}
	}

	/**
	 * Handle inline "Approve" button click on review queue.
	 */
	$(document).on('click', '.prautoblogger-approve-btn', function () {
		var $btn = $(this);
		var postId = $btn.data('post-id');
		if ($btn.prop('disabled')) return;

		$btn.prop('disabled', true).text('Publishing…');

		$.ajax({
			url: config.ajaxUrl,
			method: 'POST',
			data: {
				action: 'prautoblogger_approve_post',
				nonce: config.reviewNonce,
				post_id: postId
			},
			timeout: 15000,
			success: function (response) {
				if (response.success) {
					$btn.closest('tr').fadeOut(300, function () { $(this).remove(); });
					showQueueStatus(response.data.message, 'success');
				} else {
					showQueueStatus(response.data && response.data.message || 'Approve failed.', 'error');
					$btn.prop('disabled', false).text('Approve');
				}
			},
			error: function () {
				showQueueStatus('Request failed. Check server logs.', 'error');
				$btn.prop('disabled', false).text('Approve');
			}
		});
	});

	/**
	 * Handle inline "Reject" button click on review queue.
	 */
	$(document).on('click', '.prautoblogger-reject-btn', function () {
		var $btn = $(this);
		var postId = $btn.data('post-id');
		if ($btn.prop('disabled')) return;

		if (!confirm('Reject this post? It will be moved to trash.')) return;

		$btn.prop('disabled', true).text('Rejecting…');

		$.ajax({
			url: config.ajaxUrl,
			method: 'POST',
			data: {
				action: 'prautoblogger_reject_post',
				nonce: config.reviewNonce,
				post_id: postId
			},
			timeout: 15000,
			success: function (response) {
				if (response.success) {
					$btn.closest('tr').fadeOut(300, function () { $(this).remove(); });
					showQueueStatus(response.data.message, 'success');
				} else {
					showQueueStatus(response.data && response.data.message || 'Reject failed.', 'error');
					$btn.prop('disabled', false).text('Reject');
				}
			},
			error: function () {
				showQueueStatus('Request failed. Check server logs.', 'error');
				$btn.prop('disabled', false).text('Reject');
			}
		});
	});

	/**
	 * Handle "Select All" checkbox on review queue.
	 */
	$(document).on('change', '#prautoblogger-select-all', function () {
		$('input[name="prautoblogger_post_ids[]"]').prop('checked', this.checked);
	});

	/*
	 * ── Log viewer ─────────────────────────────────────────────────────
	 */

	/** Toggle log entry meta detail. */
	$(document).on('click', '.ab-log-meta-toggle', function () {
		$(this).next('.ab-log-meta').slideToggle(150);
		$(this).find('.dashicons').toggleClass('dashicons-arrow-down-alt2 dashicons-arrow-up-alt2');
	});

	/** Clear old logs button. */
	$(document).on('click', '#prautoblogger-clear-logs', function () {
		var $btn = $(this);
		if ($btn.prop('disabled')) return;
		if (!confirm('Delete log entries older than 30 days?')) return;

		$btn.prop('disabled', true);
		var nonce = $btn.data('nonce');

		$.ajax({
			url: config.ajaxUrl,
			method: 'POST',
			data: { action: 'prautoblogger_clear_logs', nonce: nonce, days: 30 },
			timeout: 15000,
			success: function (response) {
				var $status = $('#prautoblogger-log-status');
				if (response.success) {
					$status.removeClass('hidden error').text(response.data.message);
					setTimeout(function () { window.location.reload(); }, 1200);
				} else {
					$status.removeClass('hidden').addClass('error').text(response.data && response.data.message || 'Failed.');
				}
			},
			complete: function () { $btn.prop('disabled', false); }
		});
	});


	// Refresh model registry button.
	$(document).on('click', '#prautoblogger-refresh-models', function (e) {
		e.preventDefault();
		var $btn = $(this);
		var nonce = $btn.data('nonce');
		var originalText = $btn.html();

		$btn.prop('disabled', true).addClass('ab-btn-loading');

		$.ajax({
			url: ajaxurl,
			method: 'POST',
			data: {
				action: 'prautoblogger_refresh_models',
				nonce: nonce
			},
			timeout: 30000
		})
		.done(function (response) {
			if (response.success && response.data && response.data.message) {
				// Show success toast
				var $notice = $('<div class="ab-save-notice" role="status"></div>')
					.html('<span class="dashicons dashicons-yes"></span> ' + response.data.message)
					.insertBefore('.ab-layout')
					.delay(4000)
					.fadeOut(function () {
						$(this).remove();
					});
			}
		})
		.fail(function () {
			var $notice = $('<div class="ab-save-notice notice-error" role="alert"></div>')
				.html('<span class="dashicons dashicons-warning"></span> ' + 'Failed to refresh model list. Please try again.')
				.insertBefore('.ab-layout')
				.delay(5000)
				.fadeOut(function () {
					$(this).remove();
				});
		})
		.always(function () {
			$btn.prop('disabled', false).removeClass('ab-btn-loading').html(originalText);
		});
	});

})(jQuery);