#!/usr/bin/env python3
"""
Volute-XLS Cloud Server - Excel-focused MCP server for cloud deployment.

This server runs in cloud environments and provides Excel analysis tools
without requiring local Excel installations.

Note: This is a placeholder for cloud deployment. Full implementation would
require cloud-compatible Excel processing libraries.
"""

import os
import sys
from fastmcp import FastMCP
from starlette.requests import Request
from starlette.responses import PlainTextResponse
from dotenv import load_dotenv

# Load environment variables
load_dotenv()

# Server configuration
SERVER_NAME = os.getenv("CLOUD_SERVER_NAME", "Volute-XLS-Cloud")
SERVER_HOST = os.getenv("CLOUD_SERVER_HOST", "0.0.0.0")
SERVER_PORT = int(os.getenv("CLOUD_SERVER_PORT", "8000"))

# Create FastMCP server instance
mcp = FastMCP(
    name=SERVER_NAME,
    instructions=f"""
        This is a CLOUD Volute-XLS server providing Excel analysis tools.
        
        **Cloud Excel Features**:
        - Excel metadata extraction (openpyxl-based)
        - Workbook structure analysis
        - Sheet content analysis
        - Basic formula and data type detection
        - Cross-platform compatibility
        
        **Cloud Advantages**:
        - No local software requirements
        - Platform independent
        - Scalable processing
        - Always available
        
        **Cloud Limitations**:
        - No COM automation (no xlwings)
        - No native Excel image capture
        - Limited to open formats (.xlsx, .xlsm)
        - No access to local file system
        
        **Local Companion Server**: Use volute-xls-local for:
        - Full COM automation with xlwings
        - Excel sheet image capture
        - Local file system access
        - Advanced Excel integration
    """,
    on_duplicate_tools="warn",
    on_duplicate_resources="warn", 
    on_duplicate_prompts="replace",
    include_fastmcp_meta=True,
)

# ============================================================================
# CLOUD EXCEL TOOLS (LIMITED FUNCTIONALITY)
# ============================================================================

@mcp.tool()
def get_cloud_excel_capabilities() -> dict:
    """Get information about cloud Excel capabilities."""
    return {
        "server_type": "CLOUD",
        "excel_libraries": {
            "openpyxl": True,
            "xlwings": False,
            "com_automation": False
        },
        "supported_formats": [".xlsx", ".xlsm"],
        "capabilities": {
            "metadata_extraction": True,
            "sheet_analysis": True,
            "cell_data_extraction": True,
            "image_capture": False,
            "local_file_access": False
        },
        "limitations": [
            "No COM automation",
            "No image capture",
            "No local file system access",
            ".xls files not supported"
        ],
        "recommendation": "Use volute-xls-local for full Excel integration"
    }

# ============================================================================
# CLOUD RESOURCES
# ============================================================================

@mcp.resource("cloud://capabilities")
def get_cloud_capabilities() -> dict:
    """Provides cloud server capabilities."""
    return {
        "server_type": "CLOUD",
        "excel_integration": "limited",
        "image_capture": False,
        "local_file_access": False,
        "cross_platform": True,
        "local_companion": "volute-xls-local"
    }

# ============================================================================
# CUSTOM ROUTES
# ============================================================================

@mcp.custom_route("/health", methods=["GET"])
async def health_check(request: Request) -> PlainTextResponse:
    """Health check endpoint."""
    return PlainTextResponse("CLOUD-OK")

@mcp.custom_route("/info", methods=["GET"])
async def server_info_endpoint(request: Request) -> PlainTextResponse:
    """Cloud server information endpoint."""
    info = f"Server: {SERVER_NAME}\\nType: CLOUD\\nExcel: Limited\\nStatus: Running"
    return PlainTextResponse(info)

# ============================================================================
# SERVER STARTUP
# ============================================================================

def main():
    """Main entry point for the cloud server."""
    import argparse
    
    parser = argparse.ArgumentParser(description="Volute-XLS Cloud Server")
    parser.add_argument(
        "--port", 
        type=int, 
        default=SERVER_PORT,
        help=f"Port number (default: {SERVER_PORT})"
    )
    parser.add_argument(
        "--host", 
        default=SERVER_HOST,
        help=f"Host address (default: {SERVER_HOST})"
    )
    
    args = parser.parse_args()
    
    print(f"Starting {SERVER_NAME} CLOUD server...", file=sys.stderr)
    print(f"Cloud server: http://{args.host}:{args.port}", file=sys.stderr)
    print(f"Local companion: volute-xls-local", file=sys.stderr)
    print(f"Health check: http://{args.host}:{args.port}/health", file=sys.stderr)
    
    mcp.run(
        transport="http",
        host=args.host,
        port=args.port,
    )

if __name__ == "__main__":
    main()
