{% extends "base.html" %}

{% block title %}{% if document %}Edit: {{ document.title }}{% else %}New Document{% endif %} - Vim Docs{% endblock %}

{% block header_title %}{% if document %}Edit: {{ document.title }}{% else %}New Document{% endif %}{% endblock %}

{% block header_actions %}
<button id="save-document" class="inline-flex items-center px-4 py-2 bg-primary text-black rounded-md hover:bg-primary-dark transition-colors">
    <i class="mdi mdi-content-save mr-2"></i> Save
</button>
{% if document and document.id %}
<a href="{{ url_for('main.export_document', doc_id=document.id) }}" class="inline-flex items-center px-4 py-2 bg-gray-700 text-white rounded-md hover:bg-gray-600 transition-colors ml-2">
    <i class="mdi mdi-download mr-2"></i> Export
</a>
{% endif %}
<button id="toggle-preview" class="inline-flex items-center px-4 py-2 bg-gray-700 text-white rounded-md hover:bg-gray-600 transition-colors ml-2">
    <i class="mdi mdi-eye mr-2"></i> Toggle Preview
</button>
{% endblock %}

{% block extra_css %}
<!-- CodeMirror CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/codemirror.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/theme/dracula.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/addon/dialog/dialog.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/addon/hint/show-hint.min.css">

<!-- GitHub Markdown CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/5.2.0/github-markdown-dark.min.css">

<style>
    /* Editor-specific styles */
    .editor-container {
        display: flex;
        height: calc(100vh - 64px);
        overflow: hidden;
    }
    
    .editor-pane, .preview-pane {
        flex: 1;
        height: 100%;
        overflow: auto;
        transition: all 0.3s ease;
    }
    
    .editor-pane {
        position: relative;
        font-family: 'CascadyaCove NF', monospace;
    }
    
    .preview-pane {
        padding: 0;
        border-left: 1px solid #374151;
        background-color: #0d1117; /* GitHub dark theme background */
    }
    
    .CodeMirror {
        font-family: 'CascadyaCove NF', monospace !important;
        height: 100% !important;
        font-size: 15px;
    }
    
    .split-horizontal .editor-container {
        flex-direction: row;
    }
    
    .split-vertical .editor-container {
        flex-direction: column;
    }
    
    .markdown-body {
        box-sizing: border-box;
        min-width: 200px;
        max-width: 980px;
        margin: 0 auto;
        padding: 45px;
        color: #c9d1d9; /* GitHub dark theme text color */
    }
    
    /* GitHub-style admonitions/alerts */
    .markdown-body .admonition {
        padding: 1rem;
        border-left: 4px solid;
        margin: 1em 0;
        border-radius: 6px;
        background-color: rgba(175, 184, 193, 0.2);
    }
    
    .markdown-body .admonition-title {
        font-weight: 600;
        margin-top: 0;
    }
    
    /* Regular blockquotes */
    .markdown-body blockquote {
        padding: 0.5rem 1rem;
        color: #8b949e;
        border-left: 0.25em solid #30363d;
        margin: 1em 0;
        background-color: rgba(55, 65, 81, 0.1);
    }
    
    .markdown-body blockquote > :first-child {
        margin-top: 0;
    }
    
    .markdown-body blockquote > :last-child {
        margin-bottom: 0;
    }
    
    .markdown-body .admonition-note {
        border-color: #2b6eff;
        background-color: rgba(43, 110, 255, 0.1);
    }
    
    .markdown-body .admonition-note .admonition-title {
        color: #2b6eff;
    }
    
    .markdown-body .admonition-tip {
        border-color: #3fb950;
        background-color: rgba(63, 185, 80, 0.1);
    }
    
    .markdown-body .admonition-tip .admonition-title {
        color: #3fb950;
    }
    
    .markdown-body .admonition-important {
        border-color: #a371f7;
        background-color: rgba(163, 113, 247, 0.1);
    }
    
    .markdown-body .admonition-important .admonition-title {
        color: #a371f7;
    }
    
    .markdown-body .admonition-warning {
        border-color: #d29922;
        background-color: rgba(210, 153, 34, 0.1);
    }
    
    .markdown-body .admonition-warning .admonition-title {
        color: #d29922;
    }
    
    .markdown-body .admonition-caution {
        border-color: #f85149;
        background-color: rgba(248, 81, 73, 0.1);
    }
    
    .markdown-body .admonition-caution .admonition-title {
        color: #f85149;
    }
    
    .markdown-body .admonition-danger {
        border-color: #cf222e;
        background-color: rgba(207, 34, 46, 0.1);
    }
    
    .markdown-body .admonition-danger .admonition-title {
        color: #cf222e;
    }
</style>
{% endblock %}

{% block content %}
<!-- Document info bar -->
<div class="bg-gray-800 rounded-lg mb-4 shadow-lg overflow-hidden">
    <div class="p-4 grid grid-cols-1 md:grid-cols-3 gap-4">
        <div>
            <label for="doc-title" class="block text-sm font-medium text-gray-400 mb-1">Document Title</label>
            <input type="text" id="doc-title" 
                   value="{% if document %}{{ document.title }}{% else %}Untitled Document{% endif %}" 
                   class="w-full px-3 py-2 bg-gray-700 border border-gray-600 rounded-md text-white focus:outline-none focus:ring-2 focus:ring-primary focus:border-primary">
        </div>
        
        <div>
            <label for="doc-category" class="block text-sm font-medium text-gray-400 mb-1">Category</label>
            <select id="doc-category" class="w-full px-3 py-2 bg-gray-700 border border-gray-600 rounded-md text-white focus:outline-none focus:ring-2 focus:ring-primary focus:border-primary">
                <!-- Categories will be populated via JavaScript -->
            </select>
        </div>
        
        <div>
            <label for="doc-tags" class="block text-sm font-medium text-gray-400 mb-1">Tags</label>
            <div class="relative">
                <input type="text" id="doc-tags" placeholder="Add tags..." 
                       class="w-full px-3 py-2 bg-gray-700 border border-gray-600 rounded-md text-white focus:outline-none focus:ring-2 focus:ring-primary focus:border-primary">
                
                <div class="tag-list flex flex-wrap gap-1 mt-2">
                    {% if document and document.tags %}
                        {% for tag in document.tags %}
                        <span class="tag px-2 py-1 bg-primary/20 text-primary rounded-full text-xs flex items-center">
                            {{ tag.name }}
                            <span class="remove-tag ml-1 cursor-pointer">&times;</span>
                        </span>
                        {% endfor %}
                    {% endif %}
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Editor container -->
<div class="editor-container bg-gray-800 rounded-lg overflow-hidden shadow-lg">
    <div class="editor-pane">
        <textarea id="editor">{% if document %}{{ document.content }}{% endif %}</textarea>
    </div>
    <div class="preview-pane">
        <div id="preview" class="markdown-body"></div>
    </div>
</div>

<!-- Save notification -->
<div id="save-notification" class="fixed bottom-4 right-4 bg-green-500/90 text-white px-4 py-2 rounded-md shadow-lg transform translate-y-16 opacity-0 transition-all duration-300 flex items-center">
    <i class="mdi mdi-check-circle mr-2"></i>
    <span>Document saved successfully!</span>
</div>
{% endblock %}

{% block extra_js %}
<!-- CodeMirror JS -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/codemirror.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/mode/markdown/markdown.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/addon/edit/continuelist.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/addon/edit/closebrackets.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/addon/mode/overlay.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/addon/selection/active-line.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/addon/dialog/dialog.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/addon/search/searchcursor.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/addon/search/search.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.2/keymap/vim.min.js"></script>

<!-- Marked.js for Markdown -->
<script src="https://cdn.jsdelivr.net/npm/marked@4.0.16/marked.min.js"></script>

<script>
    // Initialize CodeMirror
    const editor = CodeMirror.fromTextArea(document.getElementById('editor'), {
        mode: 'markdown',
        theme: 'dracula',
        lineNumbers: true,
        lineWrapping: true,
        indentWithTabs: false,
        tabSize: 2,
        keyMap: 'vim',
        styleActiveLine: true,
        autoCloseBrackets: true,
        extraKeys: {
            "Enter": "newlineAndIndentContinueMarkdownList",
            "Ctrl-S": function(cm) {
                // Prevent browser's save dialog
                event.preventDefault();
                // Trigger document save
                document.getElementById('save-document').click();
                return false;
            }
        }
    });
    
    // Setup marked.js for markdown rendering
    marked.setOptions({
        gfm: true, // GitHub flavored markdown
        breaks: true, // Convert newlines to <br>
        headerIds: true,
        sanitize: false, // Allow raw HTML
        smartLists: true,
        smartypants: true, // Typographic fixes
        highlight: function(code) {
            return `<pre><code>${code}</code></pre>`;
        }
    });
    
    // Custom renderer for handling GitHub-style alert blocks
    const renderer = new marked.Renderer();
    
    // Store the original blockquote renderer
    const originalBlockquote = renderer.blockquote;
    
    // Override blockquote to support admonitions
    renderer.blockquote = function(quote) {
        // Check for GitHub-style admonition format [!NOTE], [!TIP], etc.
        const text = quote.replace(/<\/?p>/g, '');  // Extract text without p tags
        const admonitionRegex = /^\s*\[!(NOTE|TIP|IMPORTANT|WARNING|CAUTION|DANGER)\]\s*([\s\S]*)/i;
        const match = text.match(admonitionRegex);
        
        if (match) {
            const type = match[1].toLowerCase();
            const title = match[1].charAt(0).toUpperCase() + match[1].slice(1).toLowerCase();
            const content = match[2] ? match[2].trim() : '';
            
            return `<div class="admonition admonition-${type}">
                      <p class="admonition-title">${title}</p>
                      <p>${content}</p>
                    </div>`;
        }
        
        // Fall back to the original blockquote renderer
        return originalBlockquote.call(this, quote);
    };
    
    marked.use({ renderer });
    
    // Update markdown preview
    function updatePreview() {
        const content = editor.getValue();
        const preview = document.getElementById('preview');
        preview.innerHTML = marked.parse(content);
    }
    
    // Initialize
    document.addEventListener('DOMContentLoaded', function() {
        // Populate categories dropdown with hierarchical structure
        populateCategoriesDropdown();
        
        // Initial preview
        updatePreview();
        
        // Function to create hierarchical category dropdown
        function populateCategoriesDropdown() {
            const categorySelect = document.getElementById('doc-category');
            const categories = {{ categories|tojson|safe }};
            const preselectedId = {% if document and document.category_id %}{{ document.category_id }}{% elif preselected_category_id %}{{ preselected_category_id }}{% else %}null{% endif %};
            
            // Find the root category
            const rootCategory = categories.find(c => c.is_root);
            let rootCategoryId = null;
            if (rootCategory) {
                rootCategoryId = rootCategory.id;
            }
            
            function addCategoryOptions(categoryList, depth = 0) {
                categoryList.forEach(category => {
                    const option = document.createElement('option');
                    option.value = category.id;
                    
                    // Create indentation for hierarchy
                    const indent = '\u00A0\u00A0\u00A0\u00A0'.repeat(depth);
                    let prefix = '';
                    if (depth > 0) {
                        prefix = '└─ ';
                    }
                    
                    option.textContent = indent + prefix + category.name;
                    
                    // Select this option if it matches the preselected ID
                    // Or if this is the root category and no preselection was made
                    option.selected = (category.id == preselectedId) || 
                                     (category.is_root && !preselectedId);
                    
                    categorySelect.appendChild(option);
                    
                    // Add children recursively if any
                    if (category.children && category.children.length > 0) {
                        addCategoryOptions(category.children, depth + 1);
                    }
                });
            }
            
            // Get root categories and their children
            const rootCategories = categories.filter(c => c.parent_id === null);
            addCategoryOptions(rootCategories);
            
            console.log("Preselected category ID:", preselectedId || (rootCategoryId + " (root by default)"));
        }
        
        // Add debounce function for efficiency
        function debounce(func, wait) {
            let timeout;
            return function() {
                const context = this;
                const args = arguments;
                clearTimeout(timeout);
                timeout = setTimeout(() => func.apply(context, args), wait);
            };
        }
        
        // Debounced preview update
        const debouncedUpdate = debounce(updatePreview, 300);
        
        // Update preview when content changes
        editor.on('change', debouncedUpdate);
        
        // Sync scroll between editor and preview
        const previewPane = document.querySelector('.preview-pane');
        
        // Editor to Preview scroll sync
        editor.on('scroll', function() {
            const scrollInfo = editor.getScrollInfo();
            const ratio = scrollInfo.top / (scrollInfo.height - scrollInfo.clientHeight);
            const previewHeight = previewPane.scrollHeight - previewPane.clientHeight;
            
            // Add a flag to prevent infinite scroll loop
            if (!previewPane.isScrolling) {
                editor.isScrolling = true;
                previewPane.scrollTop = ratio * previewHeight;
                setTimeout(() => { editor.isScrolling = false; }, 50);
            }
        });
        
        // Preview to Editor scroll sync
        previewPane.addEventListener('scroll', function() {
            if (!editor.isScrolling) {
                const ratio = previewPane.scrollTop / (previewPane.scrollHeight - previewPane.clientHeight);
                const scrollInfo = editor.getScrollInfo();
                const editorHeight = scrollInfo.height - scrollInfo.clientHeight;
                
                previewPane.isScrolling = true;
                editor.scrollTo(null, ratio * editorHeight);
                setTimeout(() => { previewPane.isScrolling = false; }, 50);
            }
        });
        
        // Toggle preview pane
        const toggleBtn = document.getElementById('toggle-preview');
        const editorContainer = document.querySelector('.editor-container');
        const previewElement = document.querySelector('.preview-pane');
        
        toggleBtn.addEventListener('click', function() {
            previewElement.classList.toggle('hidden');
            
            if (previewElement.classList.contains('hidden')) {
                toggleBtn.innerHTML = '<i class="mdi mdi-eye-outline mr-2"></i> Show Preview';
            } else {
                toggleBtn.innerHTML = '<i class="mdi mdi-eye-off-outline mr-2"></i> Hide Preview';
                updatePreview(); // Refresh preview when showing
            }
        });
        
        // Save document 
        const saveButton = document.getElementById('save-document');
        const titleInput = document.getElementById('doc-title');
        const categorySelect = document.getElementById('doc-category');
        const notification = document.getElementById('save-notification');
        
        saveButton.addEventListener('click', function() {
            console.log("Save button clicked");
            
            const documentData = {
                title: titleInput.value.trim() || 'Untitled Document',
                content: editor.getValue(),
                category_id: categorySelect.value,
                tags: Array.from(document.querySelectorAll('.tag')).map(tag => tag.textContent.trim())
            };
            
            {% if document and document.id %}
            documentData.id = {{ document.id }};
            console.log("Updating existing document:", documentData.id);
            {% else %}
            console.log("Creating new document");
            {% endif %}
            
            console.log("Sending document data:", documentData);
            
            fetch('/api/document', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'X-CSRFToken': '{{ csrf_token() }}'
                },
                body: JSON.stringify(documentData)
            })
            .then(response => {
                if (!response.ok) {
                    throw new Error('Server responded with an error: ' + response.status);
                }
                return response.json();
            })
            .then(data => {
                console.log("Document saved successfully:", data);
                
                // Show save notification
                notification.classList.remove('translate-y-16', 'opacity-0');
                
                // Hide notification after 3 seconds
                setTimeout(() => {
                    notification.classList.add('translate-y-16', 'opacity-0');
                }, 3000);
                
                // If this is a new document, redirect to edit page
                {% if not document %}
                if (data.id) {
                    console.log("Redirecting to edit page for new document:", data.id);
                    window.location.href = `/document/${data.id}/edit`;
                }
                {% endif %}
            })
            .catch(error => {
                console.error('Error saving document:', error);
                alert('Error saving document: ' + error.message);
            });
        });
        
        // Tags functionality
        const tagInput = document.getElementById('doc-tags');
        const tagList = document.querySelector('.tag-list');
        
        function addTag(tagName) {
            const tag = document.createElement('span');
            tag.className = 'tag px-2 py-1 bg-primary/20 text-primary rounded-full text-xs flex items-center';
            tag.innerHTML = `${tagName}<span class="remove-tag ml-1 cursor-pointer">&times;</span>`;
            
            // Add remove functionality
            tag.querySelector('.remove-tag').addEventListener('click', function() {
                tag.remove();
            });
            
            tagList.appendChild(tag);
            tagInput.value = '';
        }
        
        tagInput.addEventListener('keydown', function(e) {
            if (e.key === 'Enter' || e.key === ',') {
                e.preventDefault();
                
                const tagName = tagInput.value.trim();
                if (tagName) {
                    // Check for duplicate (case insensitive)
                    const existingTags = Array.from(document.querySelectorAll('.tag')).map(tag => 
                        tag.textContent.trim().toLowerCase());
                    
                    if (!existingTags.includes(tagName.toLowerCase())) {
                        addTag(tagName);
                    } else {
                        // Flash the input to indicate duplicate
                        tagInput.classList.add('border-red-500');
                        setTimeout(() => {
                            tagInput.classList.remove('border-red-500');
                        }, 500);
                    }
                    
                    tagInput.value = '';
                }
            }
        });
        
        // Setup existing tag removal
        document.querySelectorAll('.remove-tag').forEach(btn => {
            btn.addEventListener('click', function() {
                this.parentElement.remove();
            });
        });
    });
</script>
{% endblock %}