(function ($) {
  'use strict';

  const config = window.aksrtWidgetAdmin || {};
	const core = window.AKSRTWidgetAdminCore;

  function initForm(root) {
    const $root = $(root);
    $root.find('.aksrt-widget-color').wpColorPicker();
    $root.find('.aksrt-widget-repeater__rows').sortable({
      handle: '.dashicons-move',
      axis: 'y',
      update: renumberRepeaters,
    });
    $root.find('.aksrt-widget-terms__selected').sortable({
      items: '.aksrt-widget-terms__chip',
      update: () => $root.find('.aksrt-widget-terms').each((_i, el) => syncTerms(el)),
    });
    $root.find('input[type="range"]').each(function () {
      const output = this.parentElement.querySelector('output');
      if (output) this.addEventListener('input', () => { output.textContent = this.value; });
    });
    evaluateDependencies($root);
	updateWidgetTitle($root);
	updatePlacementWarning($root);
  }

  /* terms 字段：以“已选标签”为唯一真源，同步隐藏输入(选择顺序)与复选框。 */
  function syncTerms(wrap) {
    const $wrap = $(wrap);
    const ids = $wrap.find('.aksrt-widget-terms__chip').map((_i, el) => String($(el).data('term-id'))).get();
    $wrap.find('.aksrt-widget-terms__value').val(ids.join(',')).trigger('change');
    $wrap.find('.aksrt-widget-terms__option input').each(function () {
      this.checked = ids.indexOf(String(this.value)) !== -1;
    });
  }

  function addTermChip(wrap, id, name) {
    const $selected = $(wrap).find('.aksrt-widget-terms__selected');
    if ($selected.find(`.aksrt-widget-terms__chip[data-term-id="${id}"]`).length) return;
    const chip = $(`<span class="aksrt-widget-terms__chip" data-term-id="${id}"><span class="dashicons dashicons-move" aria-hidden="true"></span></span>`);
    chip.append(document.createTextNode(name));
    chip.append('<button type="button" class="button-link-delete aksrt-widget-terms__remove" aria-label="移除">×</button>');
    $selected.append(chip);
  }

	function updateWidgetTitle(root) {
		const $root = $(root);
		const title = String($root.find('.aksrt-widget-field[data-field-id="title"] input').first().val() || '').trim();
		if (!title) return;
		$root.closest('.widget').find('.widget-title h3, .widget-title-action + h3').first().contents().filter(function () {
			return this.nodeType === Node.TEXT_NODE;
		}).first().replaceWith(`${title} `);
	}

	function updatePlacementWarning(root) {
		const $widget = $(root).closest('.widget');
		const $hint = $widget.find('.aksrt-widget-placement-hint').first();
		if (!$hint.length) return;
		const size = String($hint.data('widget-size') || 'any');
		const area = String($widget.closest('.widgets-sortables').attr('id') || '');
		const isSidebar = /sidebar/.test(area);
		$hint.toggleClass('is-warning', (size === 'wide' && isSidebar) || (size === 'sidebar' && !isSidebar && area !== ''));
	}

  function loadForm(container) {
    const $container = $(container);
    if ($container.data('loading') || $container.data('loaded')) return;
    $container.data('loading', true).find('.aksrt-widget-form-lazy__status').text(config.i18n?.loading || 'Loading…');
    $.post(config.ajaxUrl, {
      action: config.action,
      nonce: config.nonce,
      id_base: $container.data('id-base'),
      widget_number: $container.data('widget-number'),
    }).done((response) => {
      if (!response?.success || !response.data?.html) throw new Error('Invalid response');
      const $form = $(response.data.html);
      $container.replaceWith($form);
      initForm($form);
    }).fail(() => {
      $container.data('loading', false).find('.aksrt-widget-form-lazy__status').text(config.i18n?.error || 'Failed to load.');
    });
  }

  function renumberRepeaters(_event, ui) {
    const $form = $(ui?.item || this).closest('.aksrt-widget-form');
    $form.find('.aksrt-widget-repeater__rows').each(function () {
      $(this).children('.aksrt-widget-repeater__row').each(function (index) {
        this.dataset.rowIndex = String(index);
      });
    });
    $form.find('[name]').each(function () {
      const rowIndexes = $(this).parents('.aksrt-widget-repeater__row').get().reverse().map((row) => Number(row.dataset.rowIndex || 0));
      if (!rowIndexes.length) return;
			this.name = core.replaceRepeaterIndexes(this.name, rowIndexes);
    });
  }

  function fieldValue($form, id) {
    const $field = $form.find(`.aksrt-widget-field[data-field-id="${CSS.escape(id)}"]`).first();
    const $checked = $field.find('input:checked').first();
    if ($checked.length) return String($checked.val());
    return String($field.find('input,select,textarea').first().val() ?? '');
  }

  function evaluateDependencies($form) {
		$form.find('[data-dependency]').each(function () {
			const rule = core.parseDependency(this.dataset.dependency || '[]');
      const $row = $(this).closest('.aksrt-widget-repeater__row');
			const scope = $row.length ? $row : $form;
			const ids = Array.isArray(rule[0]) ? rule[0].map((part) => part[0]) : String(rule[0] || '').split('|');
			const current = {};
			ids.forEach((id) => { current[id] = fieldValue(scope, id); });
			this.hidden = !core.dependencyVisible(rule, current);
		});
  }

  $(document)
    .on('click', '.aksrt-widget-form-lazy__load', function () { loadForm($(this).closest('.aksrt-widget-form-lazy')); })
    .on('click', '.widget.open .aksrt-widget-form-lazy', function () { loadForm(this); })
    .on('change input', '.aksrt-widget-form input, .aksrt-widget-form select, .aksrt-widget-form textarea', function () {
		const $form = $(this).closest('.aksrt-widget-form');
		evaluateDependencies($form);
		updateWidgetTitle($form);
	})
    .on('click', '.aksrt-widget-repeater__add', function () {
      const $repeater = $(this).closest('.aksrt-widget-repeater');
      const max = Number($repeater.data('max-items') || 50);
      const $rows = $repeater.children('.aksrt-widget-repeater__rows');
      if ($rows.children().length >= max) return;
      const index = $rows.children().length;
      const token = String($repeater.data('index-token') || '__index__');
      const html = $repeater.children('template').html().replaceAll(token, String(index));
      const $row = $(html).appendTo($rows);
      initForm($row);
      renumberRepeaters.call($rows[0]);
    })
    .on('click', '.aksrt-widget-repeater__remove', function () {
      const $rows = $(this).closest('.aksrt-widget-repeater__rows');
      $(this).closest('.aksrt-widget-repeater__row').remove();
      renumberRepeaters.call($rows[0]);
    })
    .on('click', '.aksrt-widget-terms__remove', function () {
      $(this).closest('.aksrt-widget-terms__chip').remove();
      syncTerms($(this).closest('.aksrt-widget-terms'));
    })
    .on('change', '.aksrt-widget-terms__option input', function () {
      const wrap = this.closest('.aksrt-widget-terms');
      const option = this.closest('.aksrt-widget-terms__option');
      const id = String(this.value);
      const name = (option.querySelector('[data-term-name]') || option).getAttribute('data-term-name');
      if (this.checked) addTermChip(wrap, id, name || id);
      syncTerms(wrap);
    })
    .on('input', '.aksrt-widget-terms__search', function () {
      const needle = this.value.trim().toLowerCase();
      $(this).closest('.aksrt-widget-terms').find('.aksrt-widget-terms__option').each(function () {
        const name = String(this.getAttribute('data-term-name') || '').toLowerCase();
        this.hidden = needle !== '' && name.indexOf(needle) === -1;
      });
    })
    .on('click', '.aksrt-widget-upload__choose', function () {
      const $wrap = $(this).closest('.aksrt-widget-upload');
      const frame = wp.media({ title: $wrap.data('media-library') === 'video' ? '选择视频' : '选择图片', library: $wrap.data('media-library') ? { type: $wrap.data('media-library') } : undefined, multiple: false });
      frame.on('select', () => {
        const attachment = frame.state().get('selection').first().toJSON();
        $wrap.find('input[type="url"]').val(attachment.url).trigger('change');
        let $image = $wrap.find('img');
        if (!$image.length) $image = $('<img alt="">').prependTo($wrap);
        $image.attr('src', attachment.url);
      });
      frame.open();
    })
    .on('click', '.aksrt-widget-upload__remove', function () {
      const $wrap = $(this).closest('.aksrt-widget-upload');
      $wrap.find('input[type="url"]').val('').trigger('change');
      $wrap.find('img').remove();
    })
	.on('click', '.aksrt-widget-template-preview', function () {
		const $form = $(this).closest('form');
		const $output = $('.aksrt-widget-template-preview-output').first();
		$output.prop('hidden', false).html('<p>正在生成预览…</p>');
		$.post(config.ajaxUrl, {
			action: 'aksrt_widgets_template_preview',
			nonce: config.transferNonce,
			template: $form.find('[name="template"]').val(),
		}).done((response) => {
			if (!response?.success) throw new Error('Invalid response');
			$output.html(response.data.html || '<p>模板为空。</p>');
		}).fail(() => $output.html('<p class="notice notice-error">预览加载失败。</p>'));
	});

  $(document).on('widget-added widget-updated', function (_event, widget) {
    $(widget).find('.aksrt-widget-form-lazy').each(function () { loadForm(this); });
	updatePlacementWarning(widget);
  });

  $(function () {
    $('.aksrt-widget-form').each(function () { initForm(this); });
    $('.widget.open .aksrt-widget-form-lazy').each(function () { loadForm(this); });
  });
})(jQuery);