{% extends "base.html" %}

{% block title %}Éditer Article{% endblock %}

{% block extra_head %}
<link rel="stylesheet" type="text/css" href="https://unpkg.com/trix@2.0.8/dist/trix.css">
<style>
    /* Admin Editor Styles */
    .admin-editor {
        max-width: 1000px;
        margin: 0 auto;
        padding: var(--spacing-lg);
        background: var(--bg-card);
        border-radius: 8px;
        box-shadow: var(--shadow-md);
    }

    .editor-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: var(--spacing-lg);
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }

    .editor-title {
        margin: 0;
        font-size: 1.5rem;
        font-weight: 600;
        background: linear-gradient(135deg, var(--primary-1), var(--accent-1));
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .form-group {
        margin-bottom: var(--spacing-md);
    }

    .form-group label {
        display: block;
        margin-bottom: var(--spacing-xs);
        color: var(--text);
        font-weight: 500;
    }

    .form-control {
        width: 100%;
        padding: 0.75rem 1rem;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        background: var(--bg);
        color: var(--text);
        transition: all var(--transition-fast);
    }

    .form-control:focus {
        outline: none;
        border-color: var(--primary-1);
        box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    }

    trix-editor {
        min-height: 300px;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        background: var(--bg);
        color: var(--text);
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-lg);
    }

    trix-editor:focus {
        outline: none;
        border-color: var(--primary-1);
        box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    }

    .preview-section {
        margin-top: var(--spacing-xl);
        padding: var(--spacing-lg);
        background: var(--bg-alt);
        border-radius: 8px;
    }

    .preview-header {
        margin-bottom: var(--spacing-md);
        padding-bottom: var(--spacing-sm);
        border-bottom: 1px solid var(--border-color);
    }

    .preview-content {
        background: var(--bg);
        padding: var(--spacing-lg);
        border-radius: 8px;
        box-shadow: var(--shadow-sm);
    }

    /* Custom file input */
    .file-input-wrapper {
        position: relative;
    }

    .file-input-wrapper input[type="file"] {
        opacity: 0;
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        cursor: pointer;
    }

    .file-input-trigger {
        display: block;
        padding: 0.75rem 1rem;
        border: 2px dashed var(--border-color);
        border-radius: 8px;
        text-align: center;
        color: var(--text-light);
        transition: all var(--transition-fast);
    }

    .file-input-wrapper:hover .file-input-trigger {
        border-color: var(--primary-1);
        color: var(--primary-1);
    }
</style>
{% endblock %}

{% block content %}
<div class="admin-editor">
    <div class="editor-header">
        <h1 class="editor-title">Éditer Article</h1>
        <a href="{{ url_for('admin_articles') }}" class="btn btn-secondary">← Retour aux articles</a>
    </div>
    <form method="post" enctype="multipart/form-data">
        <div class="form-group">
            <label for="title">Titre:</label>
            <input type="text" class="form-control" id="title" name="title" value="{{ article.title }}" required>
        </div>

        <div class="form-group">
            <label for="category_id">Catégorie:</label>
            <select class="form-control" id="category_id" name="category_id" required>
                {% for category in article.category.subject.categories %}
                <option value="{{ category.id }}" {% if category.id == article.category_id %}selected{% endif %}>{{ category.name }}</option>
                {% endfor %}
            </select>
        </div>

        <div class="form-group">
            <label for="icon">Image:</label>
            <div class="file-input-wrapper">
                <div class="file-input-trigger">
                    <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="upload-icon">
                        <path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/>
                        <polyline points="17 8 12 3 7 8"/>
                        <line x1="12" y1="3" x2="12" y2="15"/>
                    </svg>
                    <span>Glissez une image ou cliquez pour sélectionner</span>
                </div>
                <input type="file" id="icon" name="icon" accept="image/*">
            </div>
        </div>

        <div class="form-group">
            <label for="youtube_url">Lien YouTube (optionnel) :</label>
            <input type="url" class="form-control" id="youtube_url" name="youtube_url" 
                   placeholder="https://www.youtube.com/watch?v=..." 
                   value="{{ article.youtube_url or '' }}">
        </div>

        <div class="form-group">
            <label for="content">Contenu:</label>
            <input id="content" type="hidden" name="content" value="{{ article.content | safe }}">
            <trix-editor input="content"></trix-editor>
        </div>

        <div class="form-group">
            <button type="submit" class="btn btn-primary">Enregistrer les modifications</button>
        </div>
    </form>

    <div class="preview-section">
        <div class="preview-header">
            <h3>Aperçu en direct</h3>
        </div>
        <div id="editor-preview" class="preview-content"></div>
    </div>

</div>

{% endblock %}

{% block extra_scripts %}
<script type="text/javascript" src="https://unpkg.com/trix@2.0.8/dist/trix.umd.min.js"></script>
<script>
    // Configure Trix before init
    document.addEventListener('trix-before-initialize', function() {
        if (window.Trix && Trix.config && Trix.config.dompurify) {
            Trix.config.dompurify.ADD_TAGS = ["iframe", "video", "source", "table", "tr", "td", "th", "img"];
            Trix.config.dompurify.ADD_ATTR = ["src", "controls", "width", "height", "class", "style", "allowfullscreen"];
        }
        Trix.config.toolbar.getDefaultHTML = function() {
            return `
                <div class="trix-button-row">
                    <span class="trix-button-group trix-button-group--text-tools" data-trix-button-group="text-tools">
                        <button type="button" class="trix-button trix-button--icon trix-button--icon-bold" data-trix-attribute="bold" title="Gras">Gras</button>
                        <button type="button" class="trix-button trix-button--icon trix-button--icon-italic" data-trix-attribute="italic" title="Italique">Italique</button>
                        <button type="button" class="trix-button" data-trix-action="x-heading" title="Titre">H</button>
                        <button type="button" class="trix-button" data-trix-action="x-quote" title="Citation">"</button>
                        <button type="button" class="trix-button trix-button--icon trix-button--icon-link" data-trix-attribute="href" title="Lien">Lien</button>
                    </span>
                    <span class="trix-button-group">
                        <button type="button" class="trix-button" data-trix-attribute="textAlign" data-trix-value="left" title="Aligner à gauche">←</button>
                        <button type="button" class="trix-button" data-trix-attribute="textAlign" data-trix-value="center" title="Centrer">⫸</button>
                        <button type="button" class="trix-button" data-trix-attribute="textAlign" data-trix-value="right" title="Aligner à droite">→</button>
                    </span>
                </div>`;
        };
    });

    function renderShortcodesForPreview(html) {
        if (!html) return '';
        html = html.replace(/\[youtube:([^\]]+)\]/g, function(_, url) {
            try {
                var parsed = new URL(url.trim());
                var id = null;
                if (parsed.hostname.includes('youtu.be')) id = parsed.pathname.slice(1);
                else if (parsed.hostname.includes('youtube')) id = parsed.searchParams.get('v') || parsed.pathname.split('/').pop();
                if (!id) return '<pre>' + url + '</pre>';
                return '<div class="video-player"><iframe src="https://www.youtube.com/embed/' + id + '" allowfullscreen></iframe></div>';
            } catch (e) {
                return '<pre>' + url + '</pre>'
            }
        });
        html = html.replace(/\[image:([^\]|]+)(?:\|([^\]]+))?\]/g, function(_, url, opts) {
            var classes = '';
            var style = '';
            if (opts) {
                opts.split(/[|,]/).forEach(function(o) {
                    o = o.trim();
                    if (/^(left|right|center)$/.test(o)) {
                        if (o === 'left') classes = 'float-left';
                        if (o === 'right') classes = 'float-right';
                        if (o === 'center') style = 'display:block;margin-left:auto;margin-right:auto';
                    } else if (/^width=/.test(o)) {
                        style += (style ? ';' : '') + 'width:' + o.split('=')[1];
                    } else if (/^height=/.test(o)) {
                        style += (style ? ';' : '') + 'height:' + o.split('=')[1];
                    }
                });
            }
            return '<img src="' + url.trim() + '" class="' + classes + '" style="' + style + '"/>';
        });
        return html;
    }

    function uploadFileToServer(fileBlob, filename, attachment) {
        var formData = new FormData();
        formData.append('file', fileBlob, filename);
        fetch('/upload', {
            method: 'POST',
            body: formData
        }).then(function(r) {
            return r.json()
        }).then(function(data) {
            if (data.url) attachment.setAttributes({
                url: data.url
            });
        }).catch(function(e) {
            console.error('Upload failed', e)
        });
    }

    // File upload and image resize handling
    document.addEventListener('trix-attachment-add', function(event) {
        var attachment = event.attachment;
        var file = attachment.file;
        if (!file) return;
        if (!file.type.startsWith('image/')) {
            uploadFileToServer(file, file.name, attachment);
            return;
        }

        // Create modal for image resize
        const modal = document.createElement('div');
        modal.style.cssText = `
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 9999;
        `;
        
        const modalContent = document.createElement('div');
        modalContent.style.cssText = `
            background: var(--bg);
            padding: 2rem;
            border-radius: var(--card-radius);
            box-shadow: var(--shadow-lg);
            max-width: 400px;
            width: 90%;
        `;
        
        modalContent.innerHTML = `
            <h3 style="margin-top:0">Redimensionner l'image ?</h3>
            <p>Entrez la largeur souhaitée :</p>
            <input type="text" placeholder="800px ou 80%" style="width:100%;padding:0.5rem;margin:1rem 0;border-radius:var(--btn-radius);border:1px solid var(--border-color)">
            <div style="display:flex;gap:1rem;justify-content:flex-end">
                <button class="btn btn-secondary cancel">Annuler</button>
                <button class="btn btn-primary confirm">Confirmer</button>
            </div>
        `;
        
        modal.appendChild(modalContent);
        document.body.appendChild(modal);
        
        const input = modalContent.querySelector('input');
        const cancelBtn = modalContent.querySelector('.cancel');
        const confirmBtn = modalContent.querySelector('.confirm');
        
        cancelBtn.onclick = () => {
            document.body.removeChild(modal);
        };
        
        confirmBtn.onclick = () => {
            const choice = input.value;
            document.body.removeChild(modal);
            
            if (!choice) {
                uploadFileToServer(file, file.name, attachment);
                return;
            }

            const reader = new FileReader();
            reader.onload = function(e) {
                const img = new Image();
                img.onload = function() {
                    const origW = img.naturalWidth,
                        origH = img.naturalHeight;
                    let targetW = origW;
                    const c = choice.toString().trim();
                    
                    if (c.endsWith('%')) {
                        const p = parseFloat(c.replace('%', ''));
                        if (!isNaN(p)) targetW = Math.round(origW * p / 100);
                    } else {
                        const px = parseInt(c, 10);
                        if (!isNaN(px)) targetW = px;
                    }
                    
                    if (targetW <= 0 || targetW === origW) {
                        uploadFileToServer(file, file.name, attachment);
                        return;
                    }
                    
                    const scale = targetW / origW,
                        targetH = Math.round(origH * scale);
                    const canvas = document.createElement('canvas');
                    canvas.width = targetW;
                    canvas.height = targetH;
                    const ctx = canvas.getContext('2d');
                    ctx.drawImage(img, 0, 0, targetW, targetH);
                    canvas.toBlob(function(blob) {
                        uploadFileToServer(blob, file.name, attachment);
                    }, file.type || 'image/jpeg', 0.92);
                };
                img.src = e.target.result;
            };
            reader.readAsDataURL(file);
        };
    });



    // Live preview updates
    function updatePreview() {
        var contentInput = document.querySelector('input[name="content"]');
        var preview = document.getElementById('editor-preview');
        if (preview && contentInput) {
            preview.innerHTML = renderShortcodesForPreview(contentInput.value);
        }
    }

    document.addEventListener('trix-change', updatePreview);
    document.addEventListener('DOMContentLoaded', updatePreview);

    // File input visual feedback
    document.querySelector('.file-input-wrapper input[type="file"]').addEventListener('change', function(e) {
        const trigger = this.parentElement.querySelector('.file-input-trigger');
        if (this.files.length > 0) {
            trigger.textContent = `Fichier sélectionné : ${this.files[0].name}`;
        }
    });

    // Keyboard shortcuts for shortcodes
    document.addEventListener('keydown', function(e) {
        // Ctrl+Y for YouTube shortcode
        if (e.ctrlKey && e.key === 'y') {
            e.preventDefault();
            const editor = document.querySelector('trix-editor');
            if (editor && editor.editor) {
                const position = editor.editor.getSelectedRange();
                editor.editor.setSelectedRange(position);
                editor.editor.insertString('[youtube:]');
                // Position cursor inside the brackets
                const newPosition = position[0] + '[youtube:'.length;
                editor.editor.setSelectedRange([newPosition, newPosition]);
            }
        }

        // Ctrl+I for responsive image shortcode
        if (e.ctrlKey && e.key === 'i') {
            e.preventDefault();
            const editor = document.querySelector('trix-editor');
            if (editor && editor.editor) {
                const position = editor.editor.getSelectedRange();
                editor.editor.setSelectedRange(position);
                editor.editor.insertString('[image:URL|width=100%]');
                // Select "URL" for easy replacement
                const urlStart = position[0] + '[image:'.length;
                const urlEnd = urlStart + 3; // "URL".length
                editor.editor.setSelectedRange([urlStart, urlEnd]);
            }
        }
    });
</script>
{% endblock %}