"""
arifOS FastMCP Server (v50.0.0)
Demonstration of FastMCP 3.0 Principles: Simple, Pythonic, Model-Agnostic.
"""

import json
import os
from typing import Any, Dict, List

try:
    from mcp.server.fastmcp import FastMCP
except ImportError:
    # Fallback if fastmcp isn't available in current env, though it should be for v50
    # This mock class allows the code to be read/understood even if dependencies aren't perfect yet
    class FastMCP:
        def __init__(self, name: str):
            self.name = name
            self.tools = []
        def tool(self):
            def decorator(func):
                self.tools.append(func)
                return func
            return decorator
        def run(self):
            print(f"Starting {self.name} (Mock FastMCP)...")

# Initialize FastMCP Server
mcp = FastMCP("arifOS-FastMCP-v50")

# -----------------------------------------------------------------------------
# Model Agnostic Configuration
# -----------------------------------------------------------------------------
# We read from environment variables to decide which model to use.
# This makes the code "Model Agnostic".
MODEL_NAME = os.getenv("ARIFOS_MODEL_NAME", "gpt-4o")
OLLAMA_HOST = os.getenv("OLLAMA_HOST", "http://localhost:11434")

# -----------------------------------------------------------------------------
# Tools
# -----------------------------------------------------------------------------

@mcp.tool()
def identify_model() -> str:
    """Returns the currently configured model (Model Agnostic Check)."""
    return f"arifOS is currently powered by: {MODEL_NAME}"

@mcp.tool()
def calculate_complexity(code: str) -> Dict[str, Any]:
    """Calculates code complexity (mock)."""
    # Simple mock logic for demonstration
    lines = code.split('\n')
    score = len(lines) * 0.1
    return {
        "lines": len(lines),
        "complexity_score": round(score, 2),
        "verdict": "complex" if score > 5 else "simple"
    }

@mcp.tool()
def echo_governance(policy: str = "F1") -> str:
    """Reflects a constitutional floor."""
    floors = {
        "F1": "Amanah (Trust) - Lock all changes reversible.",
        "F2": "Truth - Consistent with reality (>=0.99).",
        "F7": "Omega0 (Humility) - State uncertainty.",
    }
    return floors.get(policy, "Unknown Policy")

if __name__ == "__main__":
    mcp.run()
