"""Smart warehouse stock finder with price and link information"""

import requests
import re
import os
import json
import xml.etree.ElementTree as ET
import time

# Cache configuration - 12 hours
CACHE_DURATION = 43200  # 12 hours
cache = {
    'warehouse_xml': {'data': None, 'time': 0},
    'trek_xml': {'data': None, 'time': 0},
    'products_summary': {'data': None, 'time': 0},
    'search_results': {}  # Cache for specific searches
}

def get_cached_trek_xml():
    """Get Trek XML with 12-hour caching"""
    current_time = time.time()
    
    if cache['trek_xml']['data'] and (current_time - cache['trek_xml']['time'] < CACHE_DURATION):
        print("🚴 Using cached Trek XML (12-hour cache)")
        return cache['trek_xml']['data']
    
    print("📡 Fetching fresh Trek XML...")
    try:
        url = 'https://www.trekbisiklet.com.tr/output/8582384479'
        response = requests.get(url, verify=False, timeout=10)
        
        if response.status_code == 200:
            cache['trek_xml']['data'] = response.content
            cache['trek_xml']['time'] = current_time
            return response.content
        else:
            return None
    except Exception as e:
        print(f"Trek XML fetch error: {e}")
        return None

def get_product_price_and_link(product_name, variant=None):
    """Get price and link from Trek website XML"""
    try:
        # Get cached Trek XML
        xml_content = get_cached_trek_xml()
        if not xml_content:
            return None, None
            
        root = ET.fromstring(xml_content)
        
        # Normalize search terms
        search_name = product_name.lower()
        search_variant = variant.lower() if variant else ""
        
        # Turkish character normalization
        tr_map = {'ı': 'i', 'ğ': 'g', 'ü': 'u', 'ş': 's', 'ö': 'o', 'ç': 'c'}
        for tr, en in tr_map.items():
            search_name = search_name.replace(tr, en)
            search_variant = search_variant.replace(tr, en)
        
        best_match = None
        best_score = 0
        
        for item in root.findall('item'):
            # Get product name
            rootlabel_elem = item.find('rootlabel')
            if rootlabel_elem is None or not rootlabel_elem.text:
                continue
                
            item_name = rootlabel_elem.text.lower()
            for tr, en in tr_map.items():
                item_name = item_name.replace(tr, en)
            
            # Calculate match score
            score = 0
            name_parts = search_name.split()
            for part in name_parts:
                if part in item_name:
                    score += 1
            
            # Check variant if specified
            if variant and search_variant in item_name:
                score += 2  # Variant match is important
            
            if score > best_score:
                best_score = score
                best_match = item
        
        if best_match and best_score > 0:
            # Extract price
            price_elem = best_match.find('priceTaxWithCur')
            price = price_elem.text if price_elem is not None and price_elem.text else None
            
            # Round price
            if price:
                try:
                    price_float = float(price)
                    if price_float > 200000:
                        rounded = round(price_float / 5000) * 5000
                        price = f"{int(rounded):,}".replace(',', '.') + " TL"
                    elif price_float > 30000:
                        rounded = round(price_float / 1000) * 1000
                        price = f"{int(rounded):,}".replace(',', '.') + " TL"
                    elif price_float > 10000:
                        rounded = round(price_float / 100) * 100
                        price = f"{int(rounded):,}".replace(',', '.') + " TL"
                    else:
                        rounded = round(price_float / 10) * 10
                        price = f"{int(rounded):,}".replace(',', '.') + " TL"
                except:
                    price = f"{price} TL"
            
            # Extract link (field name is productLink, not productUrl!)
            link_elem = best_match.find('productLink')
            link = link_elem.text if link_elem is not None and link_elem.text else None
            
            return price, link
        
        return None, None
        
    except Exception as e:
        print(f"Error getting price/link: {e}")
        return None, None

def get_cached_warehouse_xml():
    """Get warehouse XML with 12-hour caching"""
    current_time = time.time()
    
    if cache['warehouse_xml']['data'] and (current_time - cache['warehouse_xml']['time'] < CACHE_DURATION):
        print("📦 Using cached warehouse XML (12-hour cache)")
        return cache['warehouse_xml']['data']
    
    print("📡 Fetching fresh warehouse XML...")
    for attempt in range(3):
        try:
            url = 'https://video.trek-turkey.com/bizimhesap-warehouse-xml-b2b-api-v2.php'
            timeout_val = 10 + (attempt * 5)
            response = requests.get(url, verify=False, timeout=timeout_val)
            xml_text = response.text
            print(f"DEBUG - XML fetched: {len(xml_text)} characters (attempt {attempt+1})")
            
            cache['warehouse_xml']['data'] = xml_text
            cache['warehouse_xml']['time'] = current_time
            
            return xml_text
        except requests.exceptions.Timeout:
            print(f"XML fetch timeout (attempt {attempt+1}/3, timeout={timeout_val}s)")
            if attempt == 2:
                return None
        except Exception as e:
            print(f"XML fetch error: {e}")
            return None
    
    return None

def get_warehouse_stock_smart_with_price(user_message, previous_result=None):
    """Enhanced smart warehouse search with price and link info"""
    
    # Check search cache first
    cache_key = user_message.lower()
    current_time = time.time()
    if cache_key in cache['search_results']:
        cached = cache['search_results'][cache_key]
        if current_time - cached['time'] < CACHE_DURATION:
            print(f"✅ Using cached result for '{user_message}' (12-hour cache)")
            return cached['data']
    
    OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
    
    # Check if user is asking about specific warehouse
    warehouse_keywords = {
        'caddebostan': 'Caddebostan',
        'ortaköy': 'Ortaköy', 
        'ortakoy': 'Ortaköy',
        'alsancak': 'Alsancak',
        'izmir': 'Alsancak',
        'bahçeköy': 'Bahçeköy',
        'bahcekoy': 'Bahçeköy'
    }
    
    user_lower = user_message.lower()
    asked_warehouse = None
    for keyword, warehouse in warehouse_keywords.items():
        if keyword in user_lower:
            asked_warehouse = warehouse
            break
    
    # Get cached XML data
    xml_text = get_cached_warehouse_xml()
    if not xml_text:
        return None
    
    # Extract product blocks
    product_pattern = r'<Product>(.*?)</Product>'
    all_products = re.findall(product_pattern, xml_text, re.DOTALL)
    
    # Create simplified product list for GPT
    products_summary = []
    for i, product_block in enumerate(all_products):
        name_match = re.search(r'<ProductName><!\[CDATA\[(.*?)\]\]></ProductName>', product_block)
        variant_match = re.search(r'<ProductVariant><!\[CDATA\[(.*?)\]\]></ProductVariant>', product_block)
        
        if name_match:
            warehouses_with_stock = []
            warehouse_regex = r'<Warehouse>.*?<Name><!\[CDATA\[(.*?)\]\]></Name>.*?<Stock>(.*?)</Stock>.*?</Warehouse>'
            warehouses = re.findall(warehouse_regex, product_block, re.DOTALL)
            
            for wh_name, wh_stock in warehouses:
                try:
                    if int(wh_stock.strip()) > 0:
                        warehouses_with_stock.append(wh_name)
                except:
                    pass
            
            product_info = {
                "index": i,
                "name": name_match.group(1),
                "variant": variant_match.group(1) if variant_match else "",
                "warehouses": warehouses_with_stock
            }
            products_summary.append(product_info)
    
    # Prepare warehouse filter if needed
    warehouse_filter = ""
    if asked_warehouse:
        warehouse_filter = f"\nIMPORTANT: User is asking specifically about {asked_warehouse} warehouse. Only return products available in that warehouse."
    
    # GPT-5 prompt with enhanced instructions
    smart_prompt = f"""User is asking: "{user_message}"

Find ALL products that match this query from the list below.
If user asks about specific size (S, M, L, XL, XXL, SMALL, MEDIUM, LARGE, X-LARGE), return only that size.
If user asks generally (without size), return ALL variants of the product.
{warehouse_filter}

IMPORTANT BRAND AND PRODUCT TYPE RULES:
- GOBIK: Spanish textile brand we import. When user asks about "gobik", return ALL products with "GOBIK" in the name.
- Product names contain type information: FORMA (jersey/cycling shirt), TAYT (tights), İÇLİK (base layer), YAĞMURLUK (raincoat), etc.
- Understand Turkish/English terms: 
  * "erkek forma" / "men's jersey" -> Find products with FORMA in name
  * "tayt" / "tights" -> Find products with TAYT in name  
  * "içlik" / "base layer" -> Find products with İÇLİK in name
  * "yağmurluk" / "raincoat" -> Find products with YAĞMURLUK in name
- Gender: UNISEX means for both men and women. If no gender specified, it's typically men's.

Products list (with warehouse availability):
{json.dumps(products_summary, ensure_ascii=False, indent=2)}

Return ONLY index numbers of ALL matching products as comma-separated list (e.g., "5,8,12,15").
If no products found, return ONLY: -1
DO NOT return empty string or any explanation, ONLY numbers or -1

Examples of correct responses:
- "2,5,8,12,15,20" (multiple products found)
- "45" (single product found)  
- "-1" (no products found)"""

    headers = {
        "Content-Type": "application/json",
        "Authorization": f"Bearer {OPENAI_API_KEY}"
    }
    
    payload = {
        "model": "gpt-5-chat-latest",
        "messages": [
            {"role": "system", "content": "You are a product matcher. Find ALL matching products. Return only index numbers."},
            {"role": "user", "content": smart_prompt}
        ],
        "temperature": 0,
        "max_tokens": 100
    }
    
    try:
        response = requests.post(
            "https://api.openai.com/v1/chat/completions",
            headers=headers,
            json=payload,
            timeout=10
        )
        
        if response.status_code == 200:
            result = response.json()
            indices_str = result['choices'][0]['message']['content'].strip()
            
            print(f"DEBUG - GPT-5 response: '{indices_str}'")
            
            # Handle empty response
            if not indices_str or indices_str == "-1":
                return ["Ürün bulunamadı"]
            
            try:
                # Filter out empty strings and parse indices
                indices = []
                for idx in indices_str.split(','):
                    idx = idx.strip()
                    if idx and idx.isdigit():
                        indices.append(int(idx))
                
                # Collect all matching products with price/link
                all_variants = []
                warehouse_stock = {}
                
                for idx in indices:
                    if 0 <= idx < len(all_products):
                        product_block = all_products[idx]
                        
                        # Get product details
                        name_match = re.search(r'<ProductName><!\[CDATA\[(.*?)\]\]></ProductName>', product_block)
                        variant_match = re.search(r'<ProductVariant><!\[CDATA\[(.*?)\]\]></ProductVariant>', product_block)
                        
                        if name_match:
                            product_name = name_match.group(1)
                            variant = variant_match.group(1) if variant_match else ""
                            
                            # Get price and link from Trek website
                            price, link = get_product_price_and_link(product_name, variant)
                            
                            variant_info = {
                                'name': product_name,
                                'variant': variant,
                                'price': price,
                                'link': link,
                                'warehouses': []
                            }
                            
                            # Get warehouse stock
                            warehouse_regex = r'<Warehouse>.*?<Name><!\[CDATA\[(.*?)\]\]></Name>.*?<Stock>(.*?)</Stock>.*?</Warehouse>'
                            warehouses = re.findall(warehouse_regex, product_block, re.DOTALL)
                            
                            for wh_name, wh_stock in warehouses:
                                try:
                                    stock = int(wh_stock.strip())
                                    if stock > 0:
                                        display_name = format_warehouse_name(wh_name)
                                        variant_info['warehouses'].append({
                                            'name': display_name,
                                            'stock': stock
                                        })
                                        
                                        if display_name not in warehouse_stock:
                                            warehouse_stock[display_name] = 0
                                        warehouse_stock[display_name] += stock
                                except:
                                    pass
                            
                            if variant_info['warehouses']:
                                all_variants.append(variant_info)
                
                # Format result
                result = []
                
                if asked_warehouse:
                    # Filter for specific warehouse
                    warehouse_variants = []
                    for variant in all_variants:
                        for wh in variant['warehouses']:
                            if asked_warehouse in wh['name']:
                                warehouse_variants.append(variant)
                                break
                    
                    if warehouse_variants:
                        result.append(f"{format_warehouse_name(asked_warehouse)} mağazasında mevcut:")
                        for v in warehouse_variants:
                            variant_text = f" ({v['variant']})" if v['variant'] else ""
                            result.append(f"• {v['name']}{variant_text}")
                            if v['price']:
                                result.append(f"  Fiyat: {v['price']}")
                            if v['link']:
                                result.append(f"  Link: {v['link']}")
                    else:
                        result.append(f"{format_warehouse_name(asked_warehouse)} mağazasında bu ürün mevcut değil")
                else:
                    # Show all variants
                    if all_variants:
                        # Group by product name for cleaner display
                        product_groups = {}
                        for variant in all_variants:
                            if variant['name'] not in product_groups:
                                product_groups[variant['name']] = []
                            product_groups[variant['name']].append(variant)
                        
                        result.append(f"Bulunan ürünler:")
                        
                        for product_name, variants in product_groups.items():
                            result.append(f"\n{product_name}:")
                            
                            # Show first variant's price and link (usually same for all variants)
                            if variants[0]['price']:
                                result.append(f"Fiyat: {variants[0]['price']}")
                            if variants[0]['link']:
                                result.append(f"Link: {variants[0]['link']}")
                            
                            # Show variants and their availability
                            for v in variants:
                                if v['variant']:
                                    warehouses_str = ", ".join([w['name'].replace(' mağazası', '') for w in v['warehouses']])
                                    result.append(f"• {v['variant']}: {warehouses_str}")
                            
                    else:
                        result.append("Hiçbir mağazada stok yok")
                
                # Cache the result before returning
                cache['search_results'][cache_key] = {
                    'data': result,
                    'time': current_time
                }
                print(f"💾 Cached result for '{user_message}' (12-hour cache)")
                
                return result
                
            except (ValueError, IndexError) as e:
                print(f"DEBUG - Error parsing indices: {e}")
                return None
        else:
            print(f"GPT API error: {response.status_code}")
            return None
            
    except Exception as e:
        print(f"Error calling GPT: {e}")
        return None

def format_warehouse_name(wh_name):
    """Format warehouse name nicely"""
    if "CADDEBOSTAN" in wh_name:
        return "Caddebostan mağazası"
    elif "ORTAKÖY" in wh_name:
        return "Ortaköy mağazası"
    elif "ALSANCAK" in wh_name:
        return "İzmir Alsancak mağazası"
    elif "BAHCEKOY" in wh_name or "BAHÇEKÖY" in wh_name:
        return "Bahçeköy mağazası"
    else:
        return wh_name.replace("MAGAZA DEPO", "").strip()