{% from 'govuk_frontend_jinja/components/accordion/macro.html' import govukAccordion %}
{% from 'govuk_frontend_jinja/components/radios/macro.html' import govukRadios %}
{% from 'govuk_frontend_jinja/components/input/macro.html' import govukInput %}
{% from 'govuk_frontend_jinja/components/select/macro.html' import govukSelect %}
{% from 'govuk_frontend_jinja/components/date-input/macro.html' import govukDateInput %}
{% from 'govuk_frontend_jinja/components/button/macro.html' import govukButton %}
{% from 'govuk_frontend_jinja/components/details/macro.html' import govukDetails %}
{% from 'govuk_frontend_jinja/components/pagination/macro.html' import govukPagination %}

{# Helper macro to get active filter value #}
{% macro get_active_filter_value(active_filters, filter_index) -%}
  {%- if active_filters -%}
    {%- for filter_data in active_filters -%}
      {# Handle both 3-tuple (old format) and 4-tuple (new format with operation) #}
      {%- if filter_data|length == 4 -%}
        {%- set idx, flt_name, operation, value = filter_data -%}
      {%- else -%}
        {%- set idx, flt_name, value = filter_data -%}
      {%- endif -%}
      {%- if idx == filter_index -%}{{ value }}{%- endif -%}
    {%- endfor -%}
  {%- endif -%}
{%- endmacro %}

{# Render individual filter input based on filter type #}
{% macro render_filter_input(filter, filter_key, current_value, filters) %}
  {% if filter.type == 'datepicker' %}
    {# GOV.UK Date Input - split into day/month/year fields #}
    {% set date_parts = current_value.split('-') if current_value and current_value.strip() else [] %}
    {% set day_value = date_parts[2] if date_parts|length == 3 else '' %}
    {% set month_value = date_parts[1] if date_parts|length == 3 else '' %}
    {% set year_value = date_parts[0] if date_parts|length == 3 else '' %}

    {{ govukDateInput({
      "id": filter_key,
      "namePrefix": filter_key,
      "fieldset": {
        "legend": {
          "text": filter.operation,
          "classes": "govuk-fieldset__legend--s"
        }
      },
      "hint": {
        "text": "For example, 27 3 2024"
      },
      "items": [
        {
          "name": "day",
          "classes": "govuk-input--width-2",
          "value": day_value
        },
        {
          "name": "month",
          "classes": "govuk-input--width-2",
          "value": month_value
        },
        {
          "name": "year",
          "classes": "govuk-input--width-4",
          "value": year_value
        }
      ]
    }) }}

  {% elif filter.type == 'datetimepicker' %}
    {# For datetime, provide text input with format hint #}
    {{ govukInput({
      "id": filter_key,
      "name": filter_key,
      "label": {"text": filter.operation, "classes": "govuk-label--s"},
      "hint": {"text": "Format: YYYY-MM-DD HH:MM:SS, for example 2024-03-27 14:30:00"},
      "value": current_value if current_value else "",
      "classes": "govuk-input--width-20"
    }) }}

  {% elif filter.type == 'select-with-search' %}
    {% set actual_filter = filters[filter.index] if filters and filter.index < filters|length else none %}
    {% set is_multiple = actual_filter and actual_filter.multiple %}
    {% set selected_values = current_value.split(',') if (current_value and is_multiple) else ([current_value] if current_value else []) %}

    {% set select_items = [] %}
    {% if not is_multiple %}
      {% set _ = select_items.append({"value": "", "text": "Select..."}) %}
    {% endif %}
    {% for opt_value, opt_label in (filter.options or []) %}
      {% set is_selected = (opt_value|string) in selected_values %}
      {% set _ = select_items.append({"value": opt_value, "text": opt_label, "selected": is_selected}) %}
    {% endfor %}

    {% set params = {
      "id": filter_key,
      "name": filter_key,
      "label": {"text": filter.operation, "classes": "govuk-label--s"},
      "multiple": is_multiple,
      "select_items": select_items,
      "attributes": {"data-remove-duplicates": "true"} if is_multiple else {}
    } %}

    {% include 'select-with-search.html' %}

  {% elif filter.options %}
    {# Select dropdown for filters with predefined options #}
    {# Get the actual filter object from filters list using filter.index #}
    {% set actual_filter = filters[filter.index] if filters and filter.index < filters|length else none %}

    {# Check if this is an ArrayOverlapFilter (multi-select) #}
    {% set is_array_overlap = actual_filter and actual_filter.__class__.__name__ == 'ArrayOverlapFilter' %}

    {% if is_array_overlap %}
      {# Render multi-select for array overlap filters #}
      {% set select_items = [] %}
      {% set selected_values = current_value.split(',') if current_value else [] %}
      {% for opt_value, opt_label in filter.options %}
        {% set is_selected = opt_value in selected_values %}
        {% set _ = select_items.append({"value": opt_value, "text": opt_label, "selected": is_selected}) %}
      {% endfor %}

      {% set params = {
        "id": filter_key,
        "name": filter_key,
        "label": {"text": filter.operation, "classes": "govuk-label--s"},
        "multiple": true,
        "select_items": select_items,
        "attributes": {"data-remove-duplicates": "true"}
      } %}

      {% include 'select-with-search.html' %}
    {% else %}
      {# Standard single-select dropdown #}
      {% set select_items = [{"value": "", "text": "Select..."}] %}
      {% for opt_value, opt_label in filter.options %}
        {# For enum filters, Flask-Admin provides enum values in options but expects enum names in form submission #}
        {# Check if the actual filter object has enum_class attribute (for EnumEqualFilter, etc.) #}
        {% if actual_filter and actual_filter.enum_class is defined and actual_filter.enum_class is not none %}
          {# opt_value contains the enum value (e.g., "red") from column.type.enums #}
          {# We need to find the enum name (e.g., "RED") for form submission #}
          {# And use the enum value (e.g., "red") for display #}
          {% set ns = namespace(enum_name=opt_value, display_label=opt_value) %}
          {% for member in actual_filter.enum_class %}
            {% if member.value == opt_value or member.name == opt_value %}
              {% set ns.enum_name = opt_value %}
              {% set ns.display_label = member.value %}
            {% endif %}
          {% endfor %}
          {% set is_selected = (current_value and current_value.strip() == ns.enum_name|string) %}
          {% set _ = select_items.append({"value": ns.enum_name, "text": ns.display_label, "selected": is_selected}) %}
        {% else %}
          {% set is_selected = (current_value and current_value.strip() == opt_value|string) %}
          {% set _ = select_items.append({"value": opt_value, "text": opt_label, "selected": is_selected}) %}
        {% endif %}
      {% endfor %}

      {{ govukSelect({
        "id": filter_key,
        "name": filter_key,
        "label": {"text": filter.operation, "classes": "govuk-label--s"},
        "items": select_items
      }) }}
    {% endif %}

  {% else %}
    {# Standard text input for text/number filters #}
    {% set input_params = {
      "id": filter_key,
      "name": filter_key,
      "label": {"text": filter.operation, "classes": "govuk-label--s"},
      "value": current_value if current_value else "",
      "classes": "govuk-input--width-20"
    } %}

    {# Add inputmode for numeric filters #}
    {% if filter.type in ['int', 'float'] %}
      {% set _ = input_params.update({"inputmode": "numeric", "pattern": "[0-9]*"}) %}
    {% endif %}

    {{ govukInput(input_params) }}
  {% endif %}
{% endmacro %}

{# Render all filters for a given filter group #}
{% macro render_filter_group_content(filter_name, filter_list, active_filters, filters) %}
  <div class="govuk-form-group">
    <fieldset class="govuk-fieldset">
      <legend class="govuk-fieldset__legend govuk-fieldset__legend--s">
        Filter by {{ filter_name }}
      </legend>

      {% for filter in filter_list %}
        {% set filter_key = "flt" ~ filter.index ~ "_" ~ filter.arg %}
        {% set current_value = get_active_filter_value(active_filters, filter.index)|trim %}

        <div class="govuk-!-margin-bottom-4">
          {{ render_filter_input(filter, filter_key, current_value, filters) }}
        </div>
      {% endfor %}
    </fieldset>
  </div>
{% endmacro %}

{# Main filter form - works without JavaScript #}
{% macro filter_form() %}
<form id="filter_form" method="GET" action="{{ return_url }}">
  {# Submit button #}
  {{ govukButton({
    "text": "Apply filters",
    "preventDoubleClick": true,
  }) }}

  {# Preserve existing query state #}
  {% for arg_name, arg_value in extra_args.items() %}
    <input type="hidden" name="{{ arg_name }}" value="{{ arg_value }}">
  {% endfor %}
  {% if sort_column is not none %}
    <input type="hidden" name="sort" value="{{ sort_column }}">
  {% endif %}
  {% if sort_desc %}
    <input type="hidden" name="desc" value="1">
  {% endif %}
  {% if page_size != default_page_size %}
    <input type="hidden" name="page_size" value="{{ page_size }}">
  {% endif %}

  {# Search box at top of filter form #}
  {% if search_supported %}
    {{ govukInput({
      "id": "search",
      "name": "search",
      "type": "search",
      "label": {
        "text": "Search",
        "classes": "govuk-label--m govuk-!-margin-bottom-0"
      },
      "hint": {
        "text": ("In " ~ search_placeholder) if search_placeholder else "Search records"
      },
      "value": search if search else "",
    }) }}
  {% endif %}

  {# Render filter groups #}
  {% if filter_groups %}
    {% if filter_groups|length > 2 %}
      {# Use Accordion for multiple filter groups #}
      {% set accordion_items = [] %}
      {% for filter_name, filter_list in filter_groups.items() %}
        {% set filter_content %}
          {{ render_filter_group_content(filter_name, filter_list, active_filters, filters) }}
        {% endset %}
        {% set _ = accordion_items.append({
          "heading": {"text": filter_name},
          "content": {"html": filter_content}
        }) %}
      {% endfor %}

      {{ govukAccordion({
        "id": "filter-accordion",
        "items": accordion_items
      }) }}

    {% else %}
      {# Simple rendering for 1-2 filter groups #}
      {% for filter_name, filter_list in filter_groups.items() %}
        {{ render_filter_group_content(filter_name, filter_list, active_filters, filters) }}
      {% endfor %}
    {% endif %}
  {% endif %}
</form>
{% endmacro %}

{# Search form #}
{% macro search_form() %}
<form method="GET" action="{{ return_url }}" class="govuk-!-margin-bottom-6">
  {# Hidden fields to preserve state #}
  {% for flt_name, flt_value in filter_args.items() %}
    <input type="hidden" name="{{ flt_name }}" value="{{ flt_value }}">
  {% endfor %}
  {% if page_size != default_page_size %}
    <input type="hidden" name="page_size" value="{{ page_size }}">
  {% endif %}
  {% for arg_name, arg_value in extra_args.items() %}
    <input type="hidden" name="{{ arg_name }}" value="{{ arg_value }}">
  {% endfor %}
  {% if sort_column is not none %}
    <input type="hidden" name="sort" value="{{ sort_column }}">
  {% endif %}
  {% if sort_desc %}
    <input type="hidden" name="desc" value="1">
  {% endif %}

  <div class="govuk-grid-row">
    <div class="govuk-grid-column-two-thirds">
      {{ govukInput({
        "id": "search",
        "name": "search",
        "type": "search",
        "label": {
          "text": "Search",
          "classes": "govuk-label--s"
        },
        "hint": {
          "text": search_placeholder if search_placeholder else "Search records"
        },
        "value": search if search else ""
      }) }}
    </div>
  </div>

  <div class="govuk-button-group">
    {{ govukButton({
      "text": "Search",
      "preventDoubleClick": true
    }) }}
    {% if search %}
      <a href="{{ clear_search_url }}" class="govuk-link govuk-link--no-visited-state">
        Clear search
      </a>
    {% endif %}
  </div>
</form>
{% endmacro %}

{# Page size selector #}
{% macro page_size_form(generator, page_size_options) %}
<form method="GET" action="{{ return_url }}" class="govuk-!-display-inline-block" id="page-size-form">
  {# Preserve filters and search #}
  {% for flt_name, flt_value in filter_args.items() %}
    <input type="hidden" name="{{ flt_name }}" value="{{ flt_value }}">
  {% endfor %}
  {% if search %}
    <input type="hidden" name="search" value="{{ search }}">
  {% endif %}
  {% if sort_column is not none %}
    <input type="hidden" name="sort" value="{{ sort_column }}">
  {% endif %}
  {% if sort_desc %}
    <input type="hidden" name="desc" value="1">
  {% endif %}
  {% for arg_name, arg_value in extra_args.items() %}
    <input type="hidden" name="{{ arg_name }}" value="{{ arg_value }}">
  {% endfor %}

  {% set select_items = [] %}
  {% for option in page_size_options %}
    {% set is_selected = (page_size == option) %}
    {% set _ = select_items.append({
      "value": option,
      "text": option ~ " per page",
      "selected": is_selected
    }) %}
  {% endfor %}

  {{ govukSelect({
    "id": "page-size",
    "name": "page_size",
    "label": {"text": "Items per page", "classes": "govuk-label--s govuk-visually-hidden"},
    "classes": "xgovuk-fa-page-size-select",
    "items": select_items,
    "attributes": {"data-module": "auto-submit"}
  }) }}

  <noscript>
    {{ govukButton({
      "text": "Update",
      "classes": "govuk-button--secondary"
    }) }}
  </noscript>
</form>
{% endmacro %}

{# Export options #}
{% macro export_options() %}
  <h3 class="govuk-heading-s govuk-visually-hidden">Export</h3>
  <ul class="govuk-list">
    {% for export_type in admin_view.export_types %}
      <li>
        <a href="{{ get_url('.export', export_type=export_type, **request.args) }}"
           class="govuk-button govuk-button--secondary govuk-!-margin-bottom-0"
           download>
          Download {{ count }} results as {{ export_type|upper }}
        </a>
      </li>
    {% endfor %}
  </ul>
{% endmacro %}

{# MOJ Filter Layout - wraps filter sidebar and content area with actions and pagination #}
{% macro mojFilterLayout() %}
  <div class="moj-filter-layout">
    <div class="moj-filter-layout__filter">
      {% if search_supported or filters %}
      <div class="moj-filter" data-module="moj-filter">
        <div class="moj-filter__header">
          <div class="moj-filter__header-title">
            <h2 class="govuk-heading-m">Filter</h2>
          </div>
          <div class="moj-filter__header-action">
          </div>
        </div>
        <div class="moj-filter__content">
          {# Selected filters section #}
          {% if active_filters or search %}
          <div class="moj-filter__selected">
            <div class="moj-filter__selected-heading">
              <div class="moj-filter__heading-title">
                <h2 class="govuk-heading-m">Selected filters</h2>
              </div>
              <div class="moj-filter__heading-action">
                <p class="govuk-body"><a class="govuk-link govuk-link--no-visited-state" href="{{ clear_search_url }}">Clear filters</a></p>
              </div>
            </div>

            {# Search filter tag - remove search while preserving all filters #}
            {% if search %}
            <h3 class="govuk-heading-s govuk-!-margin-bottom-0">Search</h3>
            <ul class="moj-filter-tags">
              <li>
                <a class="moj-filter__tag" href="{{ admin_view._get_remove_search_url(filter_args, sort_column, sort_desc, page_size, default_page_size, extra_args) }}">
                  <span class="govuk-visually-hidden">Remove this filter</span>
                  {{ search }}
                </a>
              </li>
            </ul>
            {% endif %}

            {# Active filter tags grouped by filter name #}
            {% if active_filters %}
              {% set ns = namespace(current_filter_name='') %}
              {% for filter_data in active_filters %}
                {# Handle both 3-tuple (old format) and 4-tuple (new format with operation) #}
                {% if filter_data|length == 4 %}
                  {% set idx, flt_name, operation, value = filter_data %}
                {% else %}
                  {% set idx, flt_name, value = filter_data %}
                  {% set operation = None %}
                {% endif %}

                {% if ns.current_filter_name != flt_name %}
                  {% if ns.current_filter_name != '' %}
                    </ul>
                  {% endif %}
                  {% set ns.current_filter_name = flt_name %}
                  <h3 class="govuk-heading-s govuk-!-margin-bottom-0">{{ flt_name }}</h3>
                  <ul class="moj-filter-tags">
                {% endif %}
                {# Resolve raw filter values to their option labels when the underlying
                   filter has an options list (e.g. SelectWithSearchFilter, ArrayOverlapFilter). #}
                {% set option_map = {} %}
                {% if filters and idx < filters|length %}
                  {% set opts = filters[idx].get_options(admin_view) %}
                  {% if opts %}
                    {% for opt_value, opt_label in opts %}
                      {% set _ = option_map.update({opt_value|string: opt_label}) %}
                    {% endfor %}
                  {% endif %}
                {% endif %}
                {% set raw_parts = value.split(',') if ',' in value|string else [value|string] %}
                {% set display_parts = [] %}
                {% for part in raw_parts %}
                  {% set _ = display_parts.append(option_map.get(part|trim, part)) %}
                {% endfor %}
                <li>
                  <a class="moj-filter__tag" href="{{ admin_view._get_remove_filter_url(loop.index0, active_filters, return_url, sort_column, sort_desc, search, page_size, default_page_size, extra_args) }}">
                    <span class="govuk-visually-hidden">Remove this filter</span>
                    {% if operation %}{{ operation }}: {% endif %}
                    {{ display_parts|join(', ') }}
                  </a>
                </li>
                {% if loop.last %}
                  </ul>
                {% endif %}
              {% endfor %}
            {% endif %}
          </div>
          {% endif %}

          {# Filter options #}
          <div class="moj-filter__options">
            {{ filter_form() }}
          </div>
        </div>
      </div>
      {% endif %}
    </div>

    <div class="moj-filter-layout__content">
      {# Action bar wrapper - fixed, doesn't scroll with table #}
      <div class="xgovuk-fa-filter-layout__action-bar">
        <div class="moj-action-bar">
          {% if search_supported or filters %}
          <div class="moj-action-bar__filter">
            {# Filter toggle button created by FilterToggleButton JS #}
          </div>
          {% endif %}

          {# Combined actions menu - only show if there are any actions available #}
          {% if actions or admin_view.can_create or admin_view.can_export %}
            <div class="moj-button-menu govuk-!-margin-bottom-6" data-module="moj-button-menu">
              {# Create button (if enabled) #}
              {% if admin_view.can_create %}
                <a href="{{ url_for('.create_view', url=return_url) }}"
                   class="govuk-button govuk-button--secondary moj-button-menu__item">
                  Create new {{ admin_view.name|lower }}
                </a>
              {% endif %}

              {# Bulk actions (if available) #}
              {% if actions %}
                {% for value, text in actions %}
                  {{ govukButton({
                    "name": "action",
                    "text": text,
                    "type": "submit",
                    "classes": "moj-button-menu__item govuk-button--secondary",
                    "attributes": {"form": "bulk-action-form", "value": value}
                  }) }}
                {% endfor %}
              {% endif %}

              {# Export buttons (if enabled) #}
              {% if admin_view.can_export %}
                {% for export_type in admin_view.export_types %}
                  <a href="{{ get_url('.export', export_type=export_type, **request.args) }}"
                     class="govuk-button govuk-button--secondary moj-button-menu__item"
                     download>
                    Download {{ count }} results as {{ export_type|upper }}
                  </a>
                {% endfor %}
              {% endif %}
            </div>
          {% endif %}
        </div>
      </div>

      {# Scrollable content wrapper - only wraps the table #}
      <div class="xgovuk-fa-scrollable-content">
        {# Bulk actions form - wrap table if actions are enabled #}
        {% if actions %}
          <form method="POST" action="{{ get_url('.action_view') }}" id="bulk-action-form">
            {% if action_form.csrf_token is defined and action_form.csrf_token %}
              {{ action_form.csrf_token }}
            {% elif csrf_token is defined and csrf_token %}
              <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
            {% endif %}
            <input type="hidden" name="url" value="{{ return_url }}">
        {% endif %}

        {# Content area - caller() allows list.html to inject the table #}
        {{ caller() }}

        {% if actions %}
          </form>
        {% endif %}
      </div>

      {# Footer - pagination, result count, page size selector #}
      {% set hasPagination = num_pages and num_pages > 1 %}
      <div class="govuk-grid-row xgovuk-fa-filter-footer">
        <div class="govuk-grid-column-one-{% if hasPagination %}quarter{% else %}half{% endif %}">
          <p class="govuk-body govuk-!-margin-top-2">
            Showing
            {% if count is not none %}
              {{ count }} result{{ 's' if count != 1 }}
            {% else %}
              results
            {% endif %}
          </p>
        </div>
        {# Pagination - centered within column #}
        {% if hasPagination %}
          <div class="govuk-grid-column-one-half">
            <div class="xgovuk-fa-pagination-wrapper">
              {{ govukPagination(govuk_pagination_data_builder(page, num_pages, pager_url)) }}
            </div>
          </div>
        {% endif %}
        <div class="govuk-grid-column-one-{% if hasPagination %}quarter{% else %}half{% endif %} govuk-!-text-align-right">
          {# Page size selector #}
          {% if can_set_page_size %}
            {{ page_size_form(page_size_url, admin_view.page_size_options) }}
          {% endif %}
        </div>
      </div>

    </div> {# end moj-filter-layout__content #}

  </div> {# end moj-filter-layout #}
{% endmacro %}