"""
Custom themes and styling for the Gradio interface.
"""

import gradio as gr
from typing import Dict, Any


def get_custom_css() -> str:
    """Get custom CSS styling for the interface."""
    return """
    /* Global styles */
    .gradio-container {
        font-family: 'Inter', sans-serif;
        max-width: 1400px !important;
        margin: 0 auto;
    }
    
    /* Header styling */
    .header-container {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 2rem;
        border-radius: 12px;
        margin-bottom: 2rem;
        text-align: center;
    }
    
    .header-title {
        font-size: 2.5rem;
        font-weight: 700;
        margin-bottom: 0.5rem;
    }
    
    .header-description {
        font-size: 1.1rem;
        opacity: 0.9;
        max-width: 600px;
        margin: 0 auto;
    }
    
    /* Tab styling */
    .tab-nav button {
        font-weight: 500;
        font-size: 1rem;
        padding: 12px 24px;
        border-radius: 8px;
        transition: all 0.2s ease;
    }
    
    .tab-nav button[aria-selected="true"] {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
    }
    
    /* Upload area styling */
    .upload-area {
        border: 2px dashed #e0e7ff;
        border-radius: 12px;
        padding: 2rem;
        text-align: center;
        background: #f8faff;
        transition: all 0.3s ease;
    }
    
    .upload-area:hover {
        border-color: #667eea;
        background: #f0f4ff;
    }
    
    /* Search interface styling */
    .search-container {
        background: white;
        border-radius: 12px;
        padding: 1.5rem;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        margin-bottom: 1.5rem;
    }
    
    .search-input {
        font-size: 1.1rem;
        padding: 1rem;
        border-radius: 8px;
        border: 2px solid #e5e7eb;
        transition: border-color 0.2s ease;
    }
    
    .search-input:focus {
        border-color: #667eea;
        outline: none;
        box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    }
    
    .search-button {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        border: none;
        padding: 1rem 2rem;
        border-radius: 8px;
        font-weight: 600;
        font-size: 1rem;
        cursor: pointer;
        transition: all 0.2s ease;
    }
    
    .search-button:hover {
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
    }
    
    /* Process Documents button styling */
    .process-button {
        background: linear-gradient(135deg, #10b981 0%, #059669 100%) !important;
        color: white !important;
        border: none !important;
        padding: 1rem 2rem !important;
        border-radius: 12px !important;
        font-weight: 700 !important;
        font-size: 1.1rem !important;
        cursor: pointer !important;
        transition: all 0.3s ease !important;
        box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3) !important;
        min-height: 60px !important;
        width: 100% !important;
    }
    
    .process-button:hover {
        transform: translateY(-2px) !important;
        box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4) !important;
        background: linear-gradient(135deg, #059669 0%, #047857 100%) !important;
    }
    
    .process-button:disabled {
        background: #d1d5db !important;
        color: #9ca3af !important;
        cursor: not-allowed !important;
        transform: none !important;
        box-shadow: none !important;
    }
    
    /* Results styling */
    .result-card {
        background: white;
        border: 1px solid #e5e7eb;
        border-radius: 12px;
        padding: 1.5rem;
        margin-bottom: 1rem;
        transition: all 0.2s ease;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    }
    
    .result-card:hover {
        border-color: #667eea;
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.1);
    }
    
    .result-title {
        font-size: 1.1rem;
        font-weight: 600;
        color: #374151;
        margin-bottom: 0.5rem;
    }
    
    .result-content {
        color: #6b7280;
        line-height: 1.6;
        margin-bottom: 1rem;
    }
    
    .result-metadata {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        margin-bottom: 0.5rem;
    }
    
    .metadata-tag {
        background: #f3f4f6;
        color: #374151;
        padding: 0.25rem 0.5rem;
        border-radius: 6px;
        font-size: 0.875rem;
        font-weight: 500;
    }
    
    .score-badge {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        padding: 0.25rem 0.75rem;
        border-radius: 20px;
        font-size: 0.875rem;
        font-weight: 600;
    }
    
    /* Progress bar styling */
    .progress-container {
        background: #f3f4f6;
        border-radius: 8px;
        overflow: hidden;
        height: 12px;
        margin: 1rem 0;
    }
    
    .progress-bar {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        height: 100%;
        transition: width 0.3s ease;
    }
    
    /* Statistics cards */
    .stat-card {
        background: white;
        border-radius: 12px;
        padding: 1.5rem;
        text-align: center;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
        border: 1px solid #e5e7eb;
    }
    
    .stat-number {
        font-size: 2rem;
        font-weight: 700;
        color: #667eea;
        margin-bottom: 0.5rem;
    }
    
    .stat-label {
        color: #6b7280;
        font-weight: 500;
    }
    
    /* Analytics charts */
    .chart-container {
        background: white;
        border-radius: 12px;
        padding: 1.5rem;
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
        border: 1px solid #e5e7eb;
        margin-bottom: 1rem;
    }
    
    /* Settings panel */
    .settings-panel {
        background: #f8faff;
        border-radius: 12px;
        padding: 1.5rem;
        border: 1px solid #e0e7ff;
    }
    
    .settings-group {
        margin-bottom: 1.5rem;
    }
    
    .settings-label {
        font-weight: 600;
        color: #374151;
        margin-bottom: 0.5rem;
        display: block;
    }
    
    /* Status indicators */
    .status-indicator {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.75rem 1.25rem;
        border-radius: 25px;
        font-size: 0.9rem;
        font-weight: 600;
        text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
        transition: all 0.2s ease;
    }
    
    .status-ready {
        background: #10b981;
        color: #ffffff;
        font-weight: 600;
        border: 1px solid #059669;
    }
    
    .status-processing {
        background: #f59e0b;
        color: #ffffff;
        font-weight: 600;
        border: 1px solid #d97706;
    }
    
    .status-error {
        background: #ef4444;
        color: #ffffff;
        font-weight: 600;
        border: 1px solid #dc2626;
    }
    
    /* Responsive design */
    @media (max-width: 768px) {
        .gradio-container {
            padding: 1rem;
        }
        
        .header-title {
            font-size: 2rem;
        }
        
        .header-description {
            font-size: 1rem;
        }
        
        .search-container,
        .result-card,
        .stat-card,
        .chart-container {
            padding: 1rem;
        }
        
        .result-metadata {
            flex-direction: column;
        }
    }
    
    /* Animation classes */
    .fade-in {
        animation: fadeIn 0.3s ease-in;
    }
    
    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(10px); }
        to { opacity: 1; transform: translateY(0); }
    }
    
    .pulse {
        animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
    }
    
    @keyframes pulse {
        0%, 100% { opacity: 1; }
        50% { opacity: .5; }
    }
    
    /* Loading spinner */
    .loading-spinner {
        display: inline-block;
        width: 20px;
        height: 20px;
        border: 3px solid #f3f4f6;
        border-radius: 50%;
        border-top-color: #667eea;
        animation: spin 1s ease-in-out infinite;
    }
    
    @keyframes spin {
        to { transform: rotate(360deg); }
    }
    
    /* Scrollbar styling */
    ::-webkit-scrollbar {
        width: 8px;
        height: 8px;
    }
    
    ::-webkit-scrollbar-track {
        background: #f1f5f9;
        border-radius: 4px;
    }
    
    ::-webkit-scrollbar-thumb {
        background: #cbd5e1;
        border-radius: 4px;
    }
    
    ::-webkit-scrollbar-thumb:hover {
        background: #94a3b8;
    }
    """


def get_theme() -> gr.Theme:
    """Get the custom Gradio theme."""
    theme = gr.themes.Soft(
        primary_hue=gr.themes.Color(
            c50="#f0f4ff",
            c100="#e0e7ff",
            c200="#c7d2fe",
            c300="#a5b4fc",
            c400="#8b5cf6",
            c500="#667eea",
            c600="#5b21b6",
            c700="#4c1d95",
            c800="#3730a3",
            c900="#312e81",
            c950="#1e1b4b"
        ),
        secondary_hue=gr.themes.Color(
            c50="#f8fafc",
            c100="#f1f5f9",
            c200="#e2e8f0",
            c300="#cbd5e1",
            c400="#94a3b8",
            c500="#64748b",
            c600="#475569",
            c700="#334155",
            c800="#1e293b",
            c900="#0f172a",
            c950="#020617"
        ),
        neutral_hue=gr.themes.Color(
            c50="#f9fafb",
            c100="#f3f4f6",
            c200="#e5e7eb",
            c300="#d1d5db",
            c400="#9ca3af",
            c500="#6b7280",
            c600="#4b5563",
            c700="#374151",
            c800="#1f2937",
            c900="#111827",
            c950="#030712"
        ),
        font=[
            gr.themes.GoogleFont("Inter"),
            "ui-sans-serif",
            "system-ui",
            "sans-serif"
        ],
        font_mono=[
            gr.themes.GoogleFont("JetBrains Mono"),
            "ui-monospace",
            "Consolas",
            "monospace"
        ]
    )
    
    # Customize component styles (using only supported parameters)
    try:
        theme.set(
            button_primary_background_fill="#667eea",
            button_primary_background_fill_hover="#5a67d8",
            button_primary_text_color="white",
            button_secondary_background_fill="#f8fafc",
            button_secondary_text_color="#374151",
            input_background_fill="#ffffff",
            input_border_color="#e5e7eb",
            block_background_fill="#ffffff",
            block_border_color="#e5e7eb",
            panel_background_fill="#ffffff"
        )
    except Exception as e:
        # Fallback if theme customization fails
        print(f"Theme customization failed: {e}")
        pass
    
    return theme


def create_info_card(title: str, value: str, description: str = "") -> str:
    """Create an info card HTML."""
    return f"""
    <div class="stat-card">
        <div class="stat-number">{value}</div>
        <div class="stat-label">{title}</div>
        {f'<div style="font-size: 0.875rem; color: #6b7280; margin-top: 0.5rem;">{description}</div>' if description else ''}
    </div>
    """


def create_status_indicator(status: str, message: str) -> str:
    """Create a status indicator HTML."""
    status_class = f"status-{status.lower()}"
    icon = {
        "ready": "🟢",
        "processing": "🟡", 
        "error": "🔴",
        "loading": "⏳"
    }.get(status.lower(), "⚪")
    
    return f"""
    <div class="status-indicator {status_class}">
        <span>{icon}</span>
        <span>{message}</span>
    </div>
    """


def format_search_result(result: dict, rank: int) -> str:
    """Format a search result as HTML."""
    content = result.get("content", "No content available")
    metadata = result.get("metadata", {})
    scores = result.get("scores", {})
    
    # Truncate content for display but show more than before
    display_content = content
    if len(content) > 800:
        display_content = content[:800] + "..."
    
    # Escape HTML characters in content
    display_content = display_content.replace('<', '&lt;').replace('>', '&gt;').replace('&', '&amp;')
    
    # Format metadata tags
    metadata_tags = []
    if metadata.get("source"):
        filename = metadata['source'].split('/')[-1]
        metadata_tags.append(f"📄 {filename}")
    if metadata.get("page"):
        metadata_tags.append(f"📖 Page {metadata['page']}")
    if metadata.get("chunk_index") is not None:
        metadata_tags.append(f"🔢 Chunk {metadata['chunk_index']}")
    
    metadata_html = "".join([f'<span class="metadata-tag">{tag}</span>' for tag in metadata_tags])
    
    # Format scores with more detail
    final_score = scores.get("final_score", 0)
    vector_score = scores.get("vector_score", 0)
    bm25_score = scores.get("bm25_score", 0)
    
    score_html = f'<span class="score-badge">Score: {final_score:.3f}</span>'
    
    # Add detailed scores in a collapsible section
    detailed_scores = f"""
    <div style="margin-top: 0.5rem; font-size: 0.8rem; color: #6b7280;">
        Vector: {vector_score:.3f} | BM25: {bm25_score:.3f}
    </div>
    """
    
    return f"""
    <div class="result-card fade-in" style="margin-bottom: 1.5rem;">
        <div class="result-title" style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.75rem;">
            <span>Result #{rank}</span>
            {score_html}
        </div>
        <div class="result-content" style="background: #ffffff; border: 1px solid #e5e7eb; border-left: 4px solid #667eea; padding: 1rem; margin-bottom: 0.75rem; border-radius: 4px; line-height: 1.6; white-space: pre-wrap; color: #1f2937; font-weight: 500; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);">
            {display_content}
        </div>
        <div class="result-metadata" style="display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center;">
            {metadata_html}
            {detailed_scores}
        </div>
    </div>
    """


def create_progress_bar(progress: float, message: str = "") -> str:
    """Create a progress bar HTML."""
    progress_percent = max(0, min(100, progress * 100))
    
    return f"""
    <div style="margin: 1rem 0;">
        {f'<div style="margin-bottom: 0.5rem; color: #374151; font-weight: 500;">{message}</div>' if message else ''}
        <div class="progress-container">
            <div class="progress-bar" style="width: {progress_percent}%"></div>
        </div>
        <div style="text-align: center; font-size: 0.875rem; color: #6b7280; margin-top: 0.25rem;">
            {progress_percent:.1f}%
        </div>
    </div>
    """