"""FastAPI application entry point for ERP AI Assistant.

This module creates and configures the main FastAPI application instance.
"""

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from app.config import get_settings
from app.api import analyze, generate, execute

# Get application settings
settings = get_settings()

# Create FastAPI application instance
app = FastAPI(
    title=settings.APP_NAME,
    version="1.0.0",
    debug=settings.DEBUG,
    description="AI-powered assistant for ERP platform configuration"
)

# Configure CORS middleware for frontend communication
# For development: allow all origins with port 5173
# For production: configure specific origins in environment
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"] if settings.DEBUG else [
        "http://localhost:5173",
        "http://127.0.0.1:5173",
    ],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Register API routers
app.include_router(analyze.router, prefix="/api/v1", tags=["Analysis"])
app.include_router(generate.router, prefix="/api/v1", tags=["Generation"])
app.include_router(execute.router, prefix="/api/v1", tags=["Execution"])


@app.get("/", tags=["Root"])
async def root() -> dict:
    """Root endpoint returning application info.

    Returns:
        Dictionary with application name, version, and status
    """
    return {
        "message": settings.APP_NAME,
        "version": "1.0.0",
        "status": "running"
    }


@app.get("/health", tags=["Health"])
async def health_check() -> dict:
    """Health check endpoint for monitoring.

    Returns:
        Dictionary with health status
    """
    return {
        "status": "healthy",
        "version": "1.0.0"
    }


if __name__ == "__main__":
    import uvicorn

    uvicorn.run(
        "app.main:app",
        host="0.0.0.0",
        port=8000,
        reload=settings.DEBUG
    )