"""
UI Components and styling for Gradio interface
"""

# Custom CSS for premium design
CUSTOM_CSS = """
/* Main theme */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-gradient: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --card-bg: rgba(255, 255, 255, 0.05);
    --glass-bg: rgba(255, 255, 255, 0.1);
}

/* Header styling */
.header-container {
    background: var(--primary-gradient);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.3);
}

.header-title {
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
}

.header-subtitle {
    color: rgba(255, 255, 255, 0.9);
    text-align: center;
    font-size: 1.1rem;
}

/* Tab styling */
.tab-nav button {
    font-size: 1rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.tab-nav button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Card styling */
.info-card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 1.5rem;
    margin: 1rem 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Upload area */
.upload-area {
    border: 2px dashed rgba(102, 126, 234, 0.5);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
}

.upload-area:hover {
    border-color: #667eea;
    background: rgba(102, 126, 234, 0.05);
}

/* Chat messages */
.message-bubble {
    border-radius: 18px;
    padding: 0.75rem 1rem;
    margin: 0.5rem 0;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Source citations */
.source-citation {
    background: var(--glass-bg);
    border-left: 3px solid #667eea;
    padding: 0.75rem;
    margin: 0.5rem 0;
    border-radius: 6px;
    font-size: 0.9rem;
}

/* Buttons */
.primary-button {
    background: var(--primary-gradient) !important;
    color: white !important;
    border: none !important;
    padding: 0.75rem 2rem !important;
    border-radius: 8px !important;
    font-weight: 600 !important;
    transition: all 0.3s ease !important;
}

.primary-button:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4) !important;
}

/* Status indicators */
.status-success {
    color: #38ef7d;
    font-weight: 600;
}

.status-error {
    color: #ff6b6b;
    font-weight: 600;
}

/* Loading animation */
.loading {
    display: inline-block;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Document cards */
.doc-card {
    background: var(--glass-bg);
    border-radius: 12px;
    padding: 1rem;
    margin: 0.75rem 0;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.doc-card:hover {
    transform: translateX(5px);
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

/* Microphone button and recording styles */
.mic-button {
    background: var(--primary-gradient) !important;
    color: white !important;
    border: none !important;
    border-radius: 8px !important;
    padding: 0.75rem 1.5rem !important;
    font-weight: 600 !important;
    transition: all 0.3s ease !important;
    position: relative !important;
}

.mic-button:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4) !important;
}

.mic-recording {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%) !important;
    animation: pulse-recording 1.5s ease-in-out infinite !important;
}

@keyframes pulse-recording {
    0%, 100% { 
        opacity: 1;
        box-shadow: 0 0 0 0 rgba(255, 107, 107, 0.7);
    }
    50% { 
        opacity: 0.9;
        box-shadow: 0 0 0 10px rgba(255, 107, 107, 0);
    }
}

.recording-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: #ff6b6b;
    border-radius: 50%;
    margin-right: 0.5rem;
    animation: blink 1s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.audio-status {
    background: rgba(102, 126, 234, 0.1);
    border-left: 3px solid #667eea;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin: 0.5rem 0;
    font-size: 0.9rem;
}

.audio-status.processing {
    border-left-color: #ffd93d;
    background: rgba(255, 217, 61, 0.1);
}

.audio-status.error {
    border-left-color: #ff6b6b;
    background: rgba(255, 107, 107, 0.1);
}

.audio-status.success {
    border-left-color: #38ef7d;
    background: rgba(56, 239, 125, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
    .header-title {
        font-size: 2rem;
    }
    
    .tab-nav button {
        font-size: 0.9rem;
        padding: 0.5rem 1rem;
    }
}

/* ========== Document Viewer Styles ========== */

/* Document viewer container */
.document-viewer-wrapper {
    height: 600px;
    display: flex;
    flex-direction: column;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
}

.viewer-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: rgba(102, 126, 234, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.viewer-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: #667eea;
}

.doc-icon {
    font-size: 1.2rem;
}

.doc-name {
    font-size: 0.95rem;
}

.viewer-actions {
    display: flex;
    gap: 0.5rem;
}

.viewer-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    padding: 0.4rem 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.viewer-btn:hover {
    background: rgba(102, 126, 234, 0.3);
    border-color: #667eea;
    transform: translateY(-1px);
}

/* Document content area */
.document-viewer-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    font-size: 1em;
    line-height: 1.6;
}

.document-content {
    max-width: 800px;
    margin: 0 auto;
}

.document-header {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid rgba(102, 126, 234, 0.3);
}

.document-header h3 {
    color: #667eea;
    margin: 0 0 0.5rem 0;
    font-size: 1.5rem;
}

.doc-meta {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin: 0;
}

/* PDF pages */
.pdf-page {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.page-number {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

/* Paragraphs */
.paragraph {
    margin-bottom: 1rem;
    padding: 0.75rem;
    border-radius: 6px;
    transition: all 0.3s ease;
    cursor: default;
}

.paragraph:hover {
    background: rgba(255, 255, 255, 0.03);
}

/* Highlighted citations */
.highlighted-citation {
    background: rgba(102, 126, 234, 0.2) !important;
    border-left: 4px solid #667eea !important;
    padding-left: 1rem !important;
    box-shadow: 0 2px 12px rgba(102, 126, 234, 0.3);
}

@keyframes highlight-flash {
    0%, 100% {
        background: rgba(102, 126, 234, 0.2);
    }
    50% {
        background: rgba(102, 126, 234, 0.4);
    }
}

/* Empty state */
.document-viewer-empty {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    color: rgba(255, 255, 255, 0.6);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.document-viewer-empty h3 {
    color: rgba(255, 255, 255, 0.7);
    margin: 0 0 0.5rem 0;
}

.document-viewer-empty p {
    color: rgba(255, 255, 255, 0.5);
    margin: 0;
}

/* ========== Citation Styles ========== */

.sources-container {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.sources-title {
    color: #667eea;
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.citation-card {
    background: var(--glass-bg);
    border-left: 3px solid #667eea;
    padding: 0.75rem 1rem;
    margin: 0.75rem 0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    animation: slideIn 0.3s ease;
}

.citation-card:hover {
    background: rgba(102, 126, 234, 0.15);
    border-left-color: #764ba2;
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

.citation-header {
    color: #667eea;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.citation-snippet {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    font-style: italic;
    line-height: 1.4;
}

/* Document selector */
.document-selector {
    margin-bottom: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.document-selector label {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.doc-select-dropdown {
    width: 100%;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.doc-select-dropdown:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #667eea;
}

.doc-select-dropdown:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.doc-select-dropdown option {
    background: #1a1a2e;
    color: white;
}

.no-docs-message {
    color: rgba(255, 255, 255, 0.5);
    text-align: center;
    padding: 1rem;
    font-style: italic;
}

/* Scrollbar styling for document viewer */
.document-viewer-content::-webkit-scrollbar {
    width: 8px;
}

.document-viewer-content::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

.document-viewer-content::-webkit-scrollbar-thumb {
    background: rgba(102, 126, 234, 0.5);
    border-radius: 4px;
}

.document-viewer-content::-webkit-scrollbar-thumb:hover {
    background: rgba(102, 126, 234, 0.7);
}
"""

def format_sources(sources: list) -> str:
    """
    Format source citations for display
    
    Args:
        sources: List of source metadata
        
    Returns:
        Formatted HTML string
    """
    if not sources:
        return ""
    
    html = "<div style='margin-top: 1rem; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,0.1);'>"
    
    for i, source in enumerate(sources, 1):
        filename = source.get('filename', 'Unknown')
        chunk_idx = source.get('chunk_index', 0)
        preview = source.get('chunk_text', '')[:150]
        
        html += f"""
        <div class='source-citation'>
            <strong>#{i} {filename}</strong> (Chunk {chunk_idx})
            <br><span style='color: rgba(255,255,255,0.7); font-size: 0.85rem;'>{preview}...</span>
        </div>
        """
    
    html += "</div>"
    return html

def format_file_size(size_bytes: int) -> str:
    """Format file size in human-readable format"""
    for unit in ['B', 'KB', 'MB', 'GB']:
        if size_bytes < 1024.0:
            return f"{size_bytes:.1f} {unit}"
        size_bytes /= 1024.0
    return f"{size_bytes:.1f} TB"

def create_document_card(doc_info: dict) -> str:
    """
    Create HTML card for document display
    
    Args:
        doc_info: Document information dictionary
        
    Returns:
        HTML string
    """
    filename = doc_info.get('filename', 'Unknown')
    num_chunks = doc_info.get('num_chunks', 0)
    
    html = f"""
    <div class='doc-card'>
        <div style='display: flex; justify-content: space-between; align-items: center;'>
            <div>
                <h4 style='margin: 0; color: #667eea;'>📄 {filename}</h4>
                <p style='margin: 0.25rem 0 0 0; color: rgba(255,255,255,0.7); font-size: 0.9rem;'>
                    {num_chunks} chunks
                </p>
            </div>
        </div>
    </div>
    """
    return html

def create_status_message(message: str, status_type: str = "info") -> str:
    """
    Create styled status message
    
    Args:
        message: Status message text
        status_type: Type of status (success, error, info, warning)
        
    Returns:
        HTML string
    """
    icons = {
        "success": "✓",
        "error": "✗",
        "info": "ℹ",
        "warning": "⚠"
    }
    
    colors = {
        "success": "#38ef7d",
        "error": "#ff6b6b",
        "info": "#667eea",
        "warning": "#ffd93d"
    }
    
    icon = icons.get(status_type, "ℹ")
    color = colors.get(status_type, "#667eea")
    
    html = f"""
    <div style='padding: 1rem; border-radius: 8px; background: rgba(255,255,255,0.05); 
                border-left: 4px solid {color}; margin: 1rem 0;'>
        <span style='color: {color}; font-weight: 600; font-size: 1.1rem;'>{icon} {message}</span>
    </div>
    """
    return html