{% extends "admin/base_site.html" %}
{% load static %}

{% block title %}{{ title }} | {{ site_title }}{% endblock %}

{% block extrahead %}
{{ block.super }}
<style>
    .config-form {
        margin: 20px 0;
    }
    .config-section {
        background: var(--body-bg, #fff);
        border: 1px solid var(--hairline-color, #e8e8e8);
        border-radius: 4px;
        margin-bottom: 20px;
        overflow: hidden;
    }
    .config-section-header {
        background: var(--darkened-bg, #f8f8f8);
        border-bottom: 1px solid var(--hairline-color, #e8e8e8);
        padding: 15px 20px;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        user-select: none;
    }
    .config-section-header:hover {
        background: var(--selected-bg, #e4e4e4);
    }
    .config-section-header h2 {
        margin: 0;
        font-size: 16px;
        font-weight: 600;
        color: var(--body-fg, #333);
    }
    .config-section-toggle {
        font-size: 12px;
        color: var(--body-quiet-color, #666);
        transition: transform 0.2s ease;
    }
    .config-section.collapsed .config-section-toggle {
        transform: rotate(-90deg);
    }
    .config-section.collapsed .config-section-body {
        display: none;
    }
    .config-section-body {
        padding: 0;
    }

    /* 2-Column Layout */
    .config-field {
        display: grid;
        grid-template-columns: 1fr 3fr;
        gap: 50px;
        padding: 20px;
        border-bottom: 1px solid var(--hairline-color, #e8e8e8);
        align-items: start;
    }
    .config-field:last-child {
        border-bottom: none;
    }
    .config-field-label-col {
        padding-top: 8px;
        text-align: right;
    }
    .config-field-label {
        display: block;
        font-weight: 600;
        font-size: 14px;
        color: var(--body-fg, #333);
        line-height: 1.4;
    }
    .config-field-required {
        color: var(--error-fg, #c00);
        margin-left: 3px;
        font-weight: bold;
    }
    .config-field-input-col {
        min-width: 0;
    }
    .config-input-wrapper {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }
    .config-field-input input[type="text"],
    .config-field-input input[type="number"],
    .config-field-input textarea,
    .config-field-input select {
        width: 100%;
        max-width: 400px;
        padding: 10px 12px;
        border: 1px solid var(--hairline-color, #ccc);
        border-radius: 4px;
        font-size: 14px;
        line-height: 1.4;
        box-sizing: border-box;
        background: var(--body-bg, #fff);
        color: var(--body-fg, #333);
    }
    .config-field-input select {
        height: auto;
        min-height: 42px;
        appearance: none;
        -webkit-appearance: none;
        -moz-appearance: none;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
        background-repeat: no-repeat;
        background-position: right 12px center;
        padding-right: 36px;
    }
    .config-field-input input:focus,
    .config-field-input textarea:focus,
    .config-field-input select:focus {
        border-color: var(--primary, #79aec8);
        outline: none;
        box-shadow: 0 0 0 2px rgba(121, 174, 200, 0.25);
    }
    .config-field-comment {
        font-size: 12px;
        color: var(--body-quiet-color, #666);
        line-height: 1.5;
    }
    .config-field-comment code {
        background: var(--darkened-bg, #f5f5f5);
        padding: 2px 6px;
        border-radius: 3px;
        font-size: 11px;
    }
    .config-field-comment a {
        color: var(--link-fg, #417690);
    }

    /* Toggle Switch Styles */
    .toggle-wrapper {
        display: inline-flex;
        align-items: center;
        gap: 12px;
        cursor: pointer;
        user-select: none;
    }
    .toggle-switch {
        position: relative;
        display: inline-block;
        width: 50px;
        height: 26px;
        flex-shrink: 0;
    }
    .toggle-switch input {
        opacity: 0;
        width: 0;
        height: 0;
    }
    .toggle-slider {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--close-button-bg, #888);
        border-radius: 26px;
        transition: 0.3s;
    }
    .toggle-slider:before {
        position: absolute;
        content: "";
        height: 20px;
        width: 20px;
        left: 3px;
        bottom: 3px;
        background-color: white;
        border-radius: 50%;
        transition: 0.3s;
        box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    }
    .toggle-switch input:checked + .toggle-slider {
        background-color: var(--primary, #79aec8);
    }
    .toggle-switch input:checked + .toggle-slider:before {
        transform: translateX(24px);
    }
    .toggle-switch input:focus + .toggle-slider {
        box-shadow: 0 0 0 2px rgba(121, 174, 200, 0.25);
    }
    .toggle-label {
        font-size: 14px;
        color: var(--body-fg, #333);
        min-width: 30px;
    }
    .toggle-wrapper:hover .toggle-slider {
        background-color: var(--body-quiet-color, #777);
    }
    .toggle-wrapper:hover .toggle-switch input:checked + .toggle-slider {
        background-color: var(--link-hover-color, #609ab6);
    }

    /* Boolean field styles */
    .config-field-boolean .config-field-input-col {
        padding-top: 4px;
    }

    .config-submit {
        position: sticky;
        top: 0;
        z-index: 100;
        margin-bottom: 20px;
        padding: 15px 20px;
        background: var(--darkened-bg, #f8f8f8);
        border: 1px solid var(--hairline-color, #e8e8e8);
        border-radius: 4px;
        display: flex;
        justify-content: flex-end;
        align-items: center;
        gap: 10px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    .config-submit input[type="submit"] {
        background: var(--primary, #79aec8);
        color: var(--primary-fg, #fff);
        border: none;
        padding: 10px 20px;
        border-radius: 4px;
        cursor: pointer;
        font-size: 14px;
        font-weight: 600;
    }
    .config-submit input[type="submit"]:hover {
        background: var(--link-hover-color, #609ab6);
    }
    .config-submit input[type="submit"]:disabled {
        background: var(--close-button-bg, #888);
        cursor: not-allowed;
        opacity: 0.6;
    }
    .breadcrumbs {
        padding: 10px 40px;
        background: var(--breadcrumbs-bg, #79aec8);
        color: var(--breadcrumbs-fg, #c4dce8);
    }
    .breadcrumbs a {
        color: var(--breadcrumbs-link-fg, #fff);
    }

    /* Changed field indicator */
    .config-field.changed {
        background: rgba(121, 174, 200, 0.05);
    }
    .config-field.changed .config-field-label:after {
        content: " •";
        color: var(--primary, #79aec8);
    }

    /* Responsive */
    @media (max-width: 768px) {
        .config-field {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .config-field-label-col {
            padding-top: 0;
            text-align: left;
        }
    }

    /* Actions styling */
    .config-actions-left {
        display: flex;
        gap: 10px;
    }
    .config-btn-secondary {
        background: var(--body-bg, #fff);
        color: var(--body-fg, #333);
        border: 1px solid var(--hairline-color, #ccc);
        padding: 10px 15px;
        border-radius: 4px;
        cursor: pointer;
        font-size: 13px;
        font-weight: 500;
        transition: all 0.2s;
    }
    .config-btn-secondary:hover {
        background: var(--darkened-bg, #f0f0f0);
        border-color: var(--hairline-color, #bbb);
    }
    @media (max-width: 500px) {
        .config-submit {
            flex-direction: column;
            align-items: stretch;
        }
        .config-actions-left {
            justify-content: space-between;
        }
        .config-btn-secondary {
            flex: 1;
            text-align: center;
        }
    }
</style>
{% endblock %}

{% block breadcrumbs %}
<div class="breadcrumbs">
    <a href="{% url 'admin:index' %}">Home</a>
    &rsaquo; <a href="{% url 'django_sysconfig:app_list' %}">System Configuration</a>
    &rsaquo; <span>{{ app_label|title }}</span>
</div>
{% endblock %}

{% block content %}

<form method="post" class="config-form" id="configForm">
    {% csrf_token %}
    <input type="hidden" name="changed_fields" id="changedFields" value="">

    {% if sections %}
    <div class="config-submit">
        <div class="config-actions-left">
            <button type="button" class="config-btn-secondary" id="toggleAllBtn" onclick="toggleAll()">Collapse All</button>
        </div>
        <input type="submit" value="Save Changes" id="submitBtn">
    </div>
    {% endif %}

    {% for section in sections %}
    <div class="config-section" data-section="{{ section.name }}">
        <div class="config-section-header" onclick="toggleSection(this)">
            <h2>{{ section.label }}</h2>
            <span class="config-section-toggle">&#9660;</span>
        </div>
        <div class="config-section-body">
            {% for field_data in section.fields %}
                {{ field_data.rendered_input|safe }}
            {% empty %}
                <p style="padding: 20px;">No fields in this section.</p>
            {% endfor %}
        </div>
    </div>
    {% empty %}
        <p>No configuration sections defined for this app.</p>
    {% endfor %}
</form>

<script>
const STORAGE_KEY = 'config_collapsed_sections';
const APP_LABEL = '{{ app_label }}';

// Get collapsed state from localStorage
function getCollapsedState() {
    try {
        const stored = localStorage.getItem(STORAGE_KEY);
        return stored ? JSON.parse(stored) : {};
    } catch (e) {
        return {};
    }
}

// Save collapsed state to localStorage
function saveCollapsedState(state) {
    try {
        localStorage.setItem(STORAGE_KEY, JSON.stringify(state));
    } catch (e) {
        // localStorage might be full or disabled
    }
}

// Toggle section and persist state
function toggleSection(header) {
    const section = header.closest('.config-section');
    const sectionName = section.dataset.section;
    const sectionId = `${APP_LABEL}.${sectionName}`;

    section.classList.toggle('collapsed');

    // Persist state
    const state = getCollapsedState();
    if (section.classList.contains('collapsed')) {
        state[sectionId] = true;
    } else {
        delete state[sectionId];
    }
    saveCollapsedState(state);
}

// Restore collapsed state on page load
(function restoreCollapsedState() {
    const state = getCollapsedState();
    document.querySelectorAll('.config-section').forEach(function(section) {
        const sectionName = section.dataset.section;
        const sectionId = `${APP_LABEL}.${sectionName}`;
        if (state[sectionId] === true) {
            section.classList.add('collapsed');
        }
    });
})();

// Expand/Collapse All Toggle
function toggleAll() {
    const btn = document.getElementById('toggleAllBtn');
    const isExpand = btn.dataset.action === 'expand';

    if (isExpand) {
        expandAllInternal();
    } else {
        collapseAllInternal();
    }
    updateToggleButton();
}

function expandAllInternal() {
    document.querySelectorAll('.config-section').forEach(section => {
        section.classList.remove('collapsed');
    });

    const state = getCollapsedState();
    document.querySelectorAll('.config-section').forEach(section => {
        const sectionName = section.dataset.section;
        const sectionId = `${APP_LABEL}.${sectionName}`;
        delete state[sectionId];
    });
    saveCollapsedState(state);
}

function collapseAllInternal() {
    document.querySelectorAll('.config-section').forEach(section => {
        section.classList.add('collapsed');
    });

    const state = getCollapsedState();
    document.querySelectorAll('.config-section').forEach(section => {
        const sectionName = section.dataset.section;
        const sectionId = `${APP_LABEL}.${sectionName}`;
        state[sectionId] = true;
    });
    saveCollapsedState(state);
}

function updateToggleButton() {
    const btn = document.getElementById('toggleAllBtn');
    if (!btn) return;

    const allSections = document.querySelectorAll('.config-section');
    const collapsedSections = document.querySelectorAll('.config-section.collapsed');

    // If all sections are collapsed, next action should be Expand
    if (allSections.length > 0 && collapsedSections.length === allSections.length) {
        btn.innerText = "Expand All";
        btn.dataset.action = "expand";
    } else {
        btn.innerText = "Collapse All";
        btn.dataset.action = "collapse";
    }
}

// Initial check
document.addEventListener('DOMContentLoaded', updateToggleButton);


// Track changed fields for optimized saving
(function() {
    const form = document.getElementById('configForm');
    const changedFieldsInput = document.getElementById('changedFields');
    const submitBtn = document.getElementById('submitBtn');
    const changedFields = new Set();
    const initialValues = new Map();

    // Store initial values
    form.querySelectorAll('input, select, textarea').forEach(function(el) {
        if (el.name && el.name.startsWith('config_')) {
            if (el.type === 'checkbox') {
                initialValues.set(el.name, el.checked);
            } else {
                initialValues.set(el.name, el.value);
            }
        }
    });

    // Listen for changes
    form.addEventListener('change', function(e) {
        const el = e.target;
        if (!el.name || !el.name.startsWith('config_')) return;

        const fieldWrapper = el.closest('.config-field');
        let currentValue, initialValue;

        if (el.type === 'checkbox') {
            currentValue = el.checked;
            initialValue = initialValues.get(el.name);
        } else {
            currentValue = el.value;
            initialValue = initialValues.get(el.name);
        }

        if (currentValue !== initialValue) {
            changedFields.add(el.name);
            if (fieldWrapper) fieldWrapper.classList.add('changed');
        } else {
            changedFields.delete(el.name);
            if (fieldWrapper) fieldWrapper.classList.remove('changed');
        }

        // Update hidden field
        changedFieldsInput.value = Array.from(changedFields).join(',');
    });

    // Also track input events for text fields
    form.addEventListener('input', function(e) {
        const el = e.target;
        if (!el.name || !el.name.startsWith('config_')) return;
        if (el.type === 'checkbox') return;

        const fieldWrapper = el.closest('.config-field');
        const currentValue = el.value;
        const initialValue = initialValues.get(el.name);

        if (currentValue !== initialValue) {
            changedFields.add(el.name);
            if (fieldWrapper) fieldWrapper.classList.add('changed');
        } else {
            changedFields.delete(el.name);
            if (fieldWrapper) fieldWrapper.classList.remove('changed');
        }

        changedFieldsInput.value = Array.from(changedFields).join(',');
    });
})();
</script>
{% endblock %}