from typing import List, Dict, Tuple, Any
from utils import get_confidence_color, get_confidence_bg_color

# Theme configuration (can be easily switched between light/dark)
THEME = "dark"  # Options: "light", "dark"

# Theme-specific colors
THEMES = {
    "light": {
        "background": "#ffffff",
        "card_bg": "#ffffff",
        "card_border": "#ddd",
        "header_bg": "#2c3e50",
        "header_text": "#ffffff",
        "text_primary": "#333333",
        "text_secondary": "#555555",
        "section_bg": "#f8f9fa",
    },
    "dark": {
        "background": "#121212",
        "card_bg": "#1e1e1e",
        "card_border": "#333",
        "header_bg": "#37474f",
        "header_text": "#ffffff",
        "text_primary": "#e0e0e0",
        "text_secondary": "#b0bec5",
        "section_bg": "#263238",
    }
}

# Get current theme colors
COLORS = THEMES[THEME]

# Base styling constants (adjusted based on theme)
STYLES = {
    "card": f"margin-bottom: 20px; border: 1px solid {COLORS['card_border']}; border-radius: 8px; overflow: hidden; background-color: {COLORS['card_bg']};",
    "header": f"background-color: {COLORS['header_bg']}; padding: 12px 15px; border-bottom: 1px solid {COLORS['card_border']};",
    "header_text": f"margin: 0; font-size: 18px; color: {COLORS['header_text']};",
    "flex_container": "display: flex; flex-wrap: wrap;",
    "method_container": f"flex: 1; width: 100%; padding: 15px; border-bottom: 1px solid {COLORS['card_border']};",
    "method_title": f"margin-top: 0; color: {COLORS['text_primary']}; padding-bottom: 8px;",
    "item_list": "list-style-type: none; padding-left: 0;",
    "item": "margin-bottom: 8px; padding: 8px; border-radius: 4px;",
    "empty_message": "color: #7f8c8d; font-style: italic;",
    "info_panel": f"padding: 10px; background-color: {COLORS['section_bg']}; margin-bottom: 10px; border-radius: 4px;"
}

# Method colors (consistent across themes)
METHOD_COLORS = {
    "base": "#f39c12",        # Orange
    "voyage": "#3498db",      # Blue
    "chicory": "#9b59b6",     # Purple
    "openai": "#2ecc71",      # Green
    "expanded": "#e74c3c",    # Red
    "hybrid": "#1abc9c",      # Turquoise
    "categories": "#1abc9c"   # Same as hybrid
}

# Method display names
METHOD_NAMES = {
    "base": "Base Embeddings",
    "voyage": "Voyage AI Reranker",
    "chicory": "Chicory Parser",
    "openai": "OpenAI",
    "expanded": "Expanded Description",
    "hybrid": "Hybrid Matching",
    "categories": "Category Matches",
    "ingredients": "Ingredient Matches"
}

def format_method_results(method_key, results, color_hex=None):
    """
    Format results for a single method section
    
    Args:
        method_key: Key identifying the method (base, voyage, etc.)
        results: List of (name, score) tuples or format-specific data structure
        color_hex: Optional color override (otherwise uses METHOD_COLORS)
        
    Returns:
        HTML string for the method section
    """
    # Get color from METHOD_COLORS if not provided
    if color_hex is None:
        color_hex = METHOD_COLORS.get(method_key, "#777777")
        
    # Get method name from METHOD_NAMES or use the key with capitalization
    method_name = METHOD_NAMES.get(method_key, method_key.replace('_', ' ').title())
    
    html = f"<div class='method-results' style='{STYLES['method_container']}'>"
    html += f"<h4 style='{STYLES['method_title']}; border-bottom: 2px solid {color_hex};'>{method_name}</h4>"
    
    if results:
        html += f"<ul style='{STYLES['item_list']}'>"
        
        # Handle different result formats
        for item in results:
            # Handle tuple with 2 elements (name, score)
            if isinstance(item, tuple) and len(item) == 2:
                name, score = item
            # Handle tuple with 3 elements (common in category results)
            elif isinstance(item, tuple) and len(item) == 3:
                id_val, text, score = item
                name = f"<strong>{id_val}</strong>: {text}" if text else id_val
            # Handle dictionary format
            elif isinstance(item, dict) and "name" in item and "score" in item:
                name = item["name"]
                score = item["score"]
            # Handle dictionary format with different keys
            elif isinstance(item, dict) and "category" in item and "confidence" in item:
                name = item["category"]
                score = item["confidence"]
            # Handle dictionary format for ingredients
            elif isinstance(item, dict) and "ingredient" in item and "relevance_score" in item:
                name = item["ingredient"]
                score = item["relevance_score"]
            # Default case - just convert to string
            else:
                name = str(item)
                score = 0.0
                
            # Ensure score is a float
            try:
                score = float(score)
            except (ValueError, TypeError):
                score = 0.0
                
            confidence_percent = int(score * 100)
            confidence_color = get_confidence_color(score)
            bg_color = get_confidence_bg_color(score)
            
            # Improved layout with better contrast and labeled confidence
            html += f"<li style='display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; padding: 6px; border-radius: 4px; background-color: rgba(240, 240, 240, 0.4);'>"
            html += f"<span style='font-weight: 500; flex: 1;'>{name}</span>"
            html += f"<span style='background-color: {bg_color}; border: 1px solid {confidence_color}; color: #000; font-weight: 600; padding: 2px 6px; border-radius: 4px; min-width: 70px; text-align: center; margin-left: 8px;'>Confidence: {confidence_percent}%</span>"
            html += "</li>"
        
        html += "</ul>"
    else:
        html += f"<p style='{STYLES['empty_message']}'>No results found</p>"
    
    html += "</div>"
    return html

def format_result_card(title, content, header_bg_color=None):
    """
    Create a styled card with a header and content
    
    Args:
        title: Card title
        content: HTML content for the card body
        header_bg_color: Optional header background color
        
    Returns:
        HTML string for the card
    """
    if header_bg_color is None:
        header_bg_color = COLORS['header_bg']  # Default header background color
    
    html = f"<div class='result-card' style='{STYLES['card']}'>"
    html += f"<div class='card-header' style='{STYLES['header']}; background-color: {header_bg_color};'>"
    html += f"<h3 style='{STYLES['header_text']}'>{title}</h3>"
    html += "</div>"
    html += f"<div class='card-content'>{content}</div>"
    html += "</div>"
    return html

def format_comparison_html(product, method_results, expanded_description=""):
    """
    Format the comparison results as HTML
    
    Args:
        product: Product name
        method_results: Dictionary with results from different methods
        expanded_description: Optional expanded product description
        
    Returns:
        HTML string
    """
    # Create the methods comparison content with column direction
    methods_html = f"<div class='methods-comparison' style='{STYLES['flex_container']}; flex-direction: column;'>"
    
    # Add expanded description if available
    if expanded_description:
        methods_html += f"<div style='{STYLES['info_panel']}'>"
        methods_html += "<h4 style='margin-top: 0; border-bottom: 1px solid rgba(0,0,0,0.1); padding-bottom: 8px;'>Expanded Description</h4>"
        methods_html += f"<p style='margin-bottom: 8px;'>{expanded_description}</p>"
        methods_html += "</div>"
    
    # Add results for each method
    for method_key in ["base", "voyage", "chicory", "openai"]:
        methods_html += format_method_results(
            method_key=method_key,
            results=method_results.get(method_key, [])
        )
    
    methods_html += "</div>"
    
    # Create the full card with the methods content
    return format_result_card(title=product, content=methods_html)

def format_reranking_results_html(results, match_type="ingredients", show_scores=True, include_explanation=False, 
                                  method="voyage", confidence_threshold=0.0):
    """
    Unified formatter that works for both Voyage and OpenAI results, using the individual elements approach
    with the original visual style.
    
    Args:
        results: List of result dictionaries
        match_type: Either "ingredients" or "categories"
        show_scores: Whether to show confidence scores
        include_explanation: Whether to include expanded descriptions
        method: Method used for ranking ("voyage" or "openai")
        confidence_threshold: Threshold for filtering individual items (default 0.0 shows all)
        
    Returns:
        HTML string for displaying results
    """
    if not results or len(results) == 0:
        return f"No {match_type.lower()} matches found."
    
    # Method-specific styling
    method_color = METHOD_COLORS.get(method, "#777777") 
    method_name = METHOD_NAMES.get(method, method.capitalize())
    
    # Create a header text
    header_text = f"Matched {len(results)} products to {match_type} using {method_name}"
    
    # Generate individual HTML elements for each result - using the old style approach
    html_elements = []
    
    for result in results:
        product_name = result.get("product_name", "")
        matching_items = result.get("matching_items", [])
        item_scores = result.get("item_scores", [])
        explanation = result.get("explanation", "") if include_explanation else ""
        
        # Convert matching items into tuples with scores for format_expanded_results_html
        formatted_matches = []
        
        # Make sure we have scores for all items
        if len(item_scores) != len(matching_items):
            # If scores are missing, use overall confidence for all
            result_confidence = result.get("confidence", 0.5)
            item_scores = [result_confidence] * len(matching_items)
        
        for i, item in enumerate(matching_items):
            score = item_scores[i]
            if ":" in item and match_type == "categories":
                # Handle category format "id: description"
                parts = item.split(":", 1)
                cat_id = parts[0].strip()
                cat_text = parts[1].strip() if len(parts) > 1 else ""
                formatted_matches.append((cat_id, cat_text, score))
            else:
                # Handle ingredient format (just name and score)
                formatted_matches.append((item, score))
        
        # Only skip if there are no matches at all
        if not formatted_matches:
            continue
            
        # Use the older style formatter with threshold
        if include_explanation:
            # Use expanded_results_html for the old style with expanded descriptions
            element_html = format_expanded_results_html(
                product=product_name,
                results=formatted_matches,
                expanded_description=explanation,
                match_type=match_type,
                confidence_threshold=confidence_threshold
            )
        else:
            # Use hybrid_results_html when no expanded description is available
            summary_text = f"{match_type.capitalize()} matches using {method_name}."
            element_html = format_hybrid_results_html(
                product=product_name,
                results=formatted_matches,
                summary=summary_text,
                expanded_description="",
                confidence_threshold=confidence_threshold
            )
        
        html_elements.append(element_html)
    
    # Combine all elements into a container
    return create_results_container(html_elements, header_text=header_text)

def create_results_container(html_elements, header_text=None):
    """
    Create a container for multiple results
    
    Args:
        html_elements: List of HTML strings to include
        header_text: Optional header text
        
    Returns:
        HTML string for the container
    """
    container = "<div class='results-container' style='font-family: Arial, sans-serif;'>"
    
    if header_text:
        container += f"<p style='color: {COLORS['text_secondary']};'>{header_text}</p>"
    
    container += ''.join(html_elements)
    container += "</div>"
    
    return container

def filter_results_by_threshold(results, confidence_threshold=0.0):
    """Helper function to filter results by confidence threshold"""
    filtered_results = []
    for item in results:
        # Handle both 2-value (match, score) and 3-value (id, text, score) tuples
        score = item[-1] if isinstance(item, tuple) and len(item) >= 2 else 0.0
        # Only include results above the threshold
        if score >= confidence_threshold:
            filtered_results.append(item)
    return filtered_results

def parse_result_item(item):
    """Helper function to parse result items into display text and score"""
    # Handle both 2-value (match, score) and 3-value (id, text, score) tuples
    if isinstance(item, tuple):
        if len(item) == 2:
            match, score = item
            display_text = match
        elif len(item) == 3:
            cat_id, cat_text, score = item
            display_text = f"{cat_id}: {cat_text}" if cat_text else cat_id
        else:
            display_text = str(item)
            score = 0.0
    else:
        display_text = str(item)
        score = 0.0
    return display_text, score

def format_expanded_results_html(product, results, expanded_description, match_type="ingredients", confidence_threshold=0.0):
    """Format results using expanded descriptions"""
    content = ""
    
    # Add expanded description section
    content += f"<div style='{STYLES['info_panel']}'>"
    content += "<h4 style='margin-top: 0; border-bottom: 1px solid rgba(0,0,0,0.1); padding-bottom: 8px;'>Expanded Description</h4>"
    content += f"<p style='margin-bottom: 8px;'>{expanded_description}</p>"
    content += "</div>"
    
    # Format the results section - create custom section
    color_hex = METHOD_COLORS.get(match_type, "#1abc9c")
    
    # Add results section with custom title
    content += f"<div class='method-results' style='margin-top: 15px; border-left: 3px solid {color_hex}; padding-left: 15px;'>"
    title_text = "Ingredients" if match_type == "ingredients" else "Categories"
    content += f"<h4 style='margin-top: 0; color: {color_hex};'>{title_text}</h4>"
    
    # Filter results by confidence threshold
    filtered_results = filter_results_by_threshold(results, confidence_threshold)
    
    if filtered_results:
        content += "<ul style='margin-top: 5px; padding-left: 20px;'>"
        for item in filtered_results:
            display_text, score = parse_result_item(item)
            confidence_percent = int(score * 100)
            # Improved styling for confidence percentage - using black text for better contrast
            confidence_color = get_confidence_color(score)
            bg_color = get_confidence_bg_color(score)
            content += f"<li style='display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px;'>"
            content += f"<span style='font-weight: 500; flex: 1;'>{display_text}</span>"
            content += f"<span style='background-color: {bg_color}; border: 1px solid {confidence_color}; color: #000; font-weight: 600; padding: 2px 6px; border-radius: 4px; min-width: 70px; text-align: center; margin-left: 8px;'>Confidence: {confidence_percent}%</span>"
            content += "</li>"
        content += "</ul>"
    else:
        content += "<p style='color: #777; font-style: italic; margin: 5px 0;'>No matches found above confidence threshold.</p>"
        
    content += "</div>"
    
    return format_result_card(title=product, content=content)

def format_hybrid_results_html(product, results, summary, expanded_description="", confidence_threshold=0.0):
    """
    Format results for hybrid matching
    
    Args:
        product: Product name
        results: List of result tuples (name, score) or (id, name, score)
        summary: Summary text to display
        expanded_description: Optional expanded description
        confidence_threshold: Threshold for filtering individual items
        
    Returns:
        HTML string for displaying results
    """
    content = ""
    
    # Add summary text
    if summary:
        content += f"<div style='{STYLES['info_panel']}'>"
        content += f"<p style='margin: 0;'>{summary}</p>"
        content += "</div>"
    
    # Add expanded description if provided
    if expanded_description:
        content += f"<div style='{STYLES['info_panel']}'>"
        content += "<h4 style='margin-top: 0; margin-bottom: 8px; border-bottom: 1px solid rgba(0,0,0,0.1); padding-bottom: 5px;'>Expanded Description</h4>"
        content += f"<p style='margin: 0;'>{expanded_description}</p>"
        content += "</div>"
    
    # Filter results by confidence threshold
    filtered_results = filter_results_by_threshold(results, confidence_threshold)
    
    # Format the results
    if filtered_results:
        content += "<div style='padding: 10px;'>"
        content += "<table style='width: 100%; border-collapse: collapse;'>"
        content += "<thead><tr>"
        content += "<th style='text-align: left; padding: 8px; border-bottom: 2px solid #ddd;'>Match</th>"
        content += "<th style='text-align: right; padding: 8px; border-bottom: 2px solid #ddd; width: 100px;'>Confidence</th>"
        content += "</tr></thead>"
        content += "<tbody>"
        
        for item in filtered_results:
            display_text, score = parse_result_item(item)
            confidence_percent = int(score * 100)
            confidence_color = get_confidence_color(score)
            bg_color = get_confidence_bg_color(score)
            
            content += "<tr>"
            content += f"<td style='text-align: left; padding: 8px; border-bottom: 1px solid #ddd;'>{display_text}</td>"
            content += f"<td style='text-align: center; padding: 8px; border-bottom: 1px solid #ddd;'>"
            content += f"<span style='background-color: {bg_color}; border: 1px solid {confidence_color}; color: #000;"
            content += f"font-weight: 600; padding: 2px 6px; border-radius: 4px; display: inline-block; width: 70px;'>"
            content += f"{confidence_percent}%</span></td>"
            content += "</tr>"
            
        content += "</tbody></table>"
        content += "</div>"
    else:
        content += "<p style='color: #777; font-style: italic; padding: 10px; margin: 0;'>No matches found above confidence threshold.</p>"
    
    return format_result_card(title=product, content=content)

def get_formatted_css():
    """
    Generate CSS for the UI based on current theme
    
    Returns:
        CSS string for styling the UI
    """
    return f"""
        .gradio-container .prose {{
            max-width: 100%;
        }}
        #results-container {{
            height: 600px !important;
            overflow-y: auto !important;
            overflow-x: hidden !important;
            padding: 15px !important;
            border: 1px solid {COLORS['card_border']} !important;
            background-color: {COLORS['background']} !important; 
            color: {COLORS['text_primary']} !important;
        }}
        /* Style for method columns */
        .methods-comparison {{
            display: flex;
            flex-wrap: wrap;
        }}
        .method-results {{
            flex: 1;
            min-width: 200px;
            padding: 15px;
            border-right: 1px solid {COLORS['card_border']};
        }}
        /* Make the product header more visible */
        .product-header {{
            background-color: {COLORS['header_bg']} !important;
            padding: 12px 15px !important;
            border-bottom: 1px solid {COLORS['card_border']} !important;
        }}
        .product-header h3 {{
            margin: 0 !important;
            font-size: 18px !important;
            color: {COLORS['header_text']} !important;
            background-color: transparent !important;
        }}
        /* Remove all nested scrollbars */
        #results-container * {{
            overflow: visible !important;
            height: auto !important;
            max-height: none !important;
        }}
    """

def set_theme(theme_name):
    """
    Update the global theme setting
    
    Args:
        theme_name: Theme name to set ("light" or "dark")
        
    Returns:
        Boolean indicating success
    """
    global THEME, COLORS, STYLES
    if theme_name in THEMES:
        THEME = theme_name
        COLORS = THEMES[THEME]
        # Update styles with new colors
        STYLES = {
            "card": f"margin-bottom: 20px; border: 1px solid {COLORS['card_border']}; border-radius: 8px; overflow: hidden; background-color: {COLORS['card_bg']};",
            "header": f"background-color: {COLORS['header_bg']}; padding: 12px 15px; border-bottom: 1px solid {COLORS['card_border']};",
            "header_text": f"margin: 0; font-size: 18px; color: {COLORS['header_text']};",
            "flex_container": "display: flex; flex-wrap: wrap;",
            "method_container": f"flex: 1; width: 100%; padding: 15px; border-bottom: 1px solid {COLORS['card_border']};",
            "method_title": f"margin-top: 0; color: {COLORS['text_primary']}; padding-bottom: 8px;",
            "item_list": "list-style-type: none; padding-left: 0;",
            "item": "margin-bottom: 8px; padding: 8px; border-radius: 4px;",
            "empty_message": "color: #7f8c8d; font-style: italic;",
            "info_panel": f"padding: 10px; background-color: {COLORS['section_bg']}; margin-bottom: 10px; border-radius: 4px;"
        }
        return True
    return False

def format_categories_html(product, categories, chicory_result=None, header_color=None, explanation="", match_type="categories"):
    """
    Format category matching results as HTML
    
    Args:
        product: Product name
        categories: List of (category, score) tuples
        chicory_result: Optional chicory parser result for the product
        header_color: Optional header background color
        explanation: Optional expanded description text
        match_type: Either "ingredients" or "categories"
        
    Returns:
        HTML string
    """
    content = ""
    
    # Add expanded description if available
    if explanation:
        content += f"<div style='{STYLES['info_panel']}'>"
        content += "<h4 style='margin-top: 0; border-bottom: 1px solid rgba(0,0,0,0.1); padding-bottom: 8px;'>Expanded Description</h4>"
        content += f"<p style='margin-bottom: 8px;'>{explanation}</p>"
        content += "</div>"
    
    # Add Chicory results if available
    if chicory_result:
        content += f"<div style='{STYLES['info_panel']}'>"
        content += "<h4 style='margin-top: 0; border-bottom: 1px solid rgba(0,0,0,0.1); padding-bottom: 8px;'>Chicory Parser Results</h4>"
        
        if isinstance(chicory_result, dict):
            ingredient = chicory_result.get("ingredient", "Not found")
            confidence = chicory_result.get("confidence", 0)
            confidence_percent = int(confidence * 100)
            
            content += f"<div style='display: flex; justify-content: space-between; align-items: center; padding: 8px; border-radius: 4px;'>"
            content += f"<span style='font-weight: bold;'>{ingredient}</span>"
            content += f"<span style='background-color: {get_confidence_bg_color(confidence)}; border: 1px solid {get_confidence_color(confidence)}; color: #000; font-weight: 600; padding: 2px 6px; border-radius: 4px; min-width: 70px; text-align: center;'>Confidence: {confidence_percent}%</span>"
            content += "</div>"
        else:
            content += f"<p style='{STYLES['empty_message']}'>No Chicory results available</p>"
            
        content += "</div>"
    
    # Add the category results
    content += format_method_results(
        method_key=match_type, 
        results=categories,
        color_hex=header_color or METHOD_COLORS.get(match_type, "#1abc9c")
    )
    
    return format_result_card(title=product, content=content)