"""
Grimlock - AI-Native Company Operating System
Main FastAPI Application
"""

from fastapi import FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from contextlib import asynccontextmanager
import logging
from dotenv import load_dotenv
import os

from api.chat import router as chat_router
from core.context_manager import ContextManager
from core.ai_client import AIClient

# Load environment variables
load_dotenv()

# Configure logging
logging.basicConfig(
    level=os.getenv("LOG_LEVEL", "INFO"),
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)

# Global state
context_manager = None
ai_client = None

@asynccontextmanager
async def lifespan(app: FastAPI):
    """Startup and shutdown events"""
    global context_manager, ai_client
    
    logger.info("Starting Grimlock backend...")
    
    # Initialize context manager
    context_path = os.getenv("CONTEXT_PATH", "./context")
    context_manager = ContextManager(context_path)
    context_manager.load_all_context()
    logger.info(f"Loaded context from {context_path}")
    
    # Initialize AI client
    api_key = os.getenv("ANTHROPIC_API_KEY")
    if not api_key:
        logger.error("ANTHROPIC_API_KEY not set!")
        raise ValueError("ANTHROPIC_API_KEY environment variable is required")
    
    ai_client = AIClient(api_key=api_key)
    logger.info("AI client initialized")
    
    yield
    
    # Cleanup
    logger.info("Shutting down Grimlock backend...")

# Create FastAPI app
app = FastAPI(
    title="Grimlock",
    description="AI-Native Company Operating System",
    version="0.1.0",
    lifespan=lifespan
)

# CORS middleware
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # Configure appropriately for production
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Include routers
app.include_router(chat_router, prefix="/api/chat", tags=["chat"])

@app.get("/")
async def root():
    """Health check endpoint"""
    return {
        "status": "online",
        "service": "Grimlock",
        "version": "0.1.0"
    }

@app.get("/api/health")
async def health():
    """Detailed health check"""
    return {
        "status": "healthy",
        "context_loaded": context_manager is not None and context_manager.is_loaded(),
        "ai_client_ready": ai_client is not None
    }

def get_context_manager() -> ContextManager:
    """Dependency to get context manager"""
    if context_manager is None:
        raise HTTPException(status_code=500, detail="Context manager not initialized")
    return context_manager

def get_ai_client() -> AIClient:
    """Dependency to get AI client"""
    if ai_client is None:
        raise HTTPException(status_code=500, detail="AI client not initialized")
    return ai_client