"""
PrestaShop MCP Server
A Model Context Protocol server that provides tools for accessing PrestaShop product data.
"""

import asyncio
import json
import logging
from typing import Any, Dict, List, Optional
from urllib.parse import urlencode

import httpx
from mcp.server import Server
from mcp.types import (
    Resource,
    Tool,
    TextContent,
    ImageContent,
    EmbeddedResource,
    CallToolRequest,
    CallToolResult,
    ListToolsRequest,
    ListToolsResult,
    ListResourcesRequest,
    ListResourcesResult,
    ReadResourceRequest,
    ReadResourceResult,
)

# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

# Default PrestaShop API configuration
DEFAULT_API_BASE = "https://shop.mcp.integration.ambris.com"
DEFAULT_TIMEOUT = 30

class PrestaShopMCPServer:
    """MCP Server for PrestaShop integration"""
    
    def __init__(self, api_base: str = DEFAULT_API_BASE):
        self.api_base = api_base.rstrip('/')
        self.server = Server("prestashop-mcp")
        self.setup_handlers()
    
    def setup_handlers(self):
        """Set up MCP server handlers"""
        
        @self.server.list_tools()
        async def list_tools() -> List[Tool]:
            """List available tools"""
            return [
                Tool(
                    name="get_product_details",
                    description="Get detailed information about a PrestaShop product including name, description, price, and features",
                    inputSchema={
                        "type": "object",
                        "properties": {
                            "product_id": {
                                "type": "integer",
                                "description": "The ID of the product to retrieve"
                            },
                            "lang_id": {
                                "type": "integer", 
                                "description": "Language ID for localized content",
                                "default": 1
                            }
                        },
                        "required": ["product_id"]
                    }
                ),
                Tool(
                    name="get_product_features",
                    description="Get product features and specifications from PrestaShop",
                    inputSchema={
                        "type": "object",
                        "properties": {
                            "product_id": {
                                "type": "integer",
                                "description": "The ID of the product to get features for"
                            }
                        },
                        "required": ["product_id"]
                    }
                ),
                Tool(
                    name="get_product_images",
                    description="Get product images and media from PrestaShop",
                    inputSchema={
                        "type": "object",
                        "properties": {
                            "product_id": {
                                "type": "integer", 
                                "description": "The ID of the product to get images for"
                            }
                        },
                        "required": ["product_id"]
                    }
                ),
                Tool(
                    name="search_products",
                    description="Search for products in PrestaShop catalog",
                    inputSchema={
                        "type": "object",
                        "properties": {
                            "query": {
                                "type": "string",
                                "description": "Search query term"
                            },
                            "limit": {
                                "type": "integer",
                                "description": "Maximum number of results to return",
                                "default": 10
                            },
                            "category_id": {
                                "type": "integer",
                                "description": "Optional category ID to filter results"
                            }
                        },
                        "required": ["query"]
                    }
                )
            ]
        
        @self.server.call_tool()
        async def call_tool(name: str, arguments: Dict[str, Any]) -> List[TextContent]:
            """Handle tool calls"""
            try:
                if name == "get_product_details":
                    return await self._get_product_details(arguments)
                elif name == "get_product_features":
                    return await self._get_product_features(arguments)
                elif name == "get_product_images":
                    return await self._get_product_images(arguments)
                elif name == "search_products":
                    return await self._search_products(arguments)
                else:
                    return [TextContent(
                        type="text",
                        text=f"Unknown tool: {name}"
                    )]
            except Exception as e:
                logger.error(f"Error calling tool {name}: {e}")
                return [TextContent(
                    type="text",
                    text=f"Error calling tool {name}: {str(e)}"
                )]
    
    async def _make_api_request(self, endpoint: str, params: Dict[str, Any] = None) -> Dict[str, Any]:
        """Make HTTP request to PrestaShop API"""
        url = f"{self.api_base}/index.php"
        
        # Default parameters
        default_params = {
            "fc": "module",
            "module": "ambaiagent", 
            "controller": "api"
        }
        
        if params:
            default_params.update(params)
        
        async with httpx.AsyncClient(timeout=DEFAULT_TIMEOUT) as client:
            try:
                response = await client.get(url, params=default_params)
                response.raise_for_status()
                
                data = response.json()
                if not data.get('success', False):
                    raise Exception(f"API error: {data.get('error', 'Unknown error')}")
                
                return data
                
            except httpx.TimeoutException:
                raise Exception("Request timeout - PrestaShop API took too long to respond")
            except httpx.HTTPStatusError as e:
                raise Exception(f"HTTP error {e.response.status_code}: {e.response.text}")
            except json.JSONDecodeError:
                raise Exception("Invalid JSON response from PrestaShop API")
    
    async def _get_product_details(self, arguments: Dict[str, Any]) -> List[TextContent]:
        """Get detailed product information"""
        product_id = arguments.get("product_id")
        lang_id = arguments.get("lang_id", 1)
        
        if not product_id:
            return [TextContent(
                type="text",
                text="Error: product_id is required"
            )]
        
        try:
            data = await self._make_api_request("", {
                "action": "get_product",
                "product_id": product_id,
                "lang_id": lang_id
            })
            
            product = data.get("product", {})
            
            # Format the product information
            result = f"""PRESTASHOP PRODUCT DETAILS (ID: {product_id})

Name: {product.get('name', 'N/A')}
Description: {product.get('description', 'N/A')}
Short Description: {product.get('description_short', 'N/A')}
Price: {product.get('price', 'N/A')}
Reference: {product.get('reference', 'N/A')}
EAN13: {product.get('ean13', 'N/A')}
Weight: {product.get('weight', 'N/A')}
Quantity: {product.get('quantity', 'N/A')}
Active: {product.get('active', 'N/A')}
Available for Order: {product.get('available_for_order', 'N/A')}

Categories: {json.dumps(product.get('categories', []), indent=2)}
Features: {json.dumps(product.get('features', []), indent=2)}
Images: {json.dumps(product.get('images', []), indent=2)}

Full Product Data:
{json.dumps(product, indent=2)}"""
            
            return [TextContent(type="text", text=result)]
            
        except Exception as e:
            return [TextContent(
                type="text",
                text=f"Error retrieving product {product_id}: {str(e)}"
            )]
    
    async def _get_product_features(self, arguments: Dict[str, Any]) -> List[TextContent]:
        """Get product features"""
        product_id = arguments.get("product_id")
        
        if not product_id:
            return [TextContent(
                type="text", 
                text="Error: product_id is required"
            )]
        
        try:
            data = await self._make_api_request("", {
                "action": "get_product",
                "product_id": product_id
            })
            
            product = data.get("product", {})
            features = product.get("features", [])
            
            if not features:
                result = f"No features found for product {product_id}"
            else:
                result = f"PRESTASHOP PRODUCT FEATURES (ID: {product_id}):\n\n"
                result += json.dumps(features, indent=2)
            
            return [TextContent(type="text", text=result)]
            
        except Exception as e:
            return [TextContent(
                type="text",
                text=f"Error retrieving features for product {product_id}: {str(e)}"
            )]
    
    async def _get_product_images(self, arguments: Dict[str, Any]) -> List[TextContent]:
        """Get product images"""
        product_id = arguments.get("product_id")
        
        if not product_id:
            return [TextContent(
                type="text",
                text="Error: product_id is required"
            )]
        
        try:
            data = await self._make_api_request("", {
                "action": "get_product",
                "product_id": product_id
            })
            
            product = data.get("product", {})
            images = product.get("images", [])
            
            if not images:
                result = f"No images found for product {product_id}"
            else:
                result = f"PRESTASHOP PRODUCT IMAGES (ID: {product_id}):\n\n"
                result += json.dumps(images, indent=2)
            
            return [TextContent(type="text", text=result)]
            
        except Exception as e:
            return [TextContent(
                type="text",
                text=f"Error retrieving images for product {product_id}: {str(e)}"
            )]
    
    async def _search_products(self, arguments: Dict[str, Any]) -> List[TextContent]:
        """Search for products"""
        query = arguments.get("query")
        limit = arguments.get("limit", 10)
        category_id = arguments.get("category_id")
        
        if not query:
            return [TextContent(
                type="text",
                text="Error: query is required"
            )]
        
        try:
            params = {
                "action": "search_products",
                "query": query,
                "limit": limit
            }
            
            if category_id:
                params["category_id"] = category_id
            
            data = await self._make_api_request("", params)
            
            products = data.get("products", [])
            
            if not products:
                result = f"No products found for query: '{query}'"
            else:
                result = f"PRESTASHOP PRODUCT SEARCH RESULTS for '{query}':\n\n"
                result += json.dumps(products, indent=2)
            
            return [TextContent(type="text", text=result)]
            
        except Exception as e:
            return [TextContent(
                type="text",
                text=f"Error searching for products with query '{query}': {str(e)}"
            )]
    
    async def run(self, transport_type: str = "stdio"):
        """Run the MCP server"""
        if transport_type == "stdio":
            from mcp.server.stdio import stdio_server
            async with stdio_server() as (read_stream, write_stream):
                await self.server.run(
                    read_stream,
                    write_stream,
                    self.server.create_initialization_options()
                )
        else:
            raise ValueError(f"Unsupported transport type: {transport_type}")

def main():
    """Main entry point"""
    import argparse
    
    parser = argparse.ArgumentParser(description="PrestaShop MCP Server")
    parser.add_argument(
        "--api-base",
        default=DEFAULT_API_BASE,
        help="PrestaShop API base URL"
    )
    parser.add_argument(
        "--transport",
        choices=["stdio"],
        default="stdio", 
        help="Transport mechanism"
    )
    
    args = parser.parse_args()
    
    server = PrestaShopMCPServer(api_base=args.api_base)
    
    try:
        asyncio.run(server.run(args.transport))
    except KeyboardInterrupt:
        logger.info("Server stopped by user")
    except Exception as e:
        logger.error(f"Server error: {e}")
        raise

if __name__ == "__main__":
    main()