from fastapi import FastAPI, Request, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import RedirectResponse, JSONResponse
from fastapi.exceptions import RequestValidationError
from api import api_router
import gradio as gr
import requests
import logging
import os
from datetime import datetime

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(levelname)s - %(name)s - %(message)s',
    handlers=[
        logging.StreamHandler(),
        logging.FileHandler('app.log')
    ]
)
logger = logging.getLogger(__name__)

app = FastAPI(
    title="Medical EHR System",
    description="Electronic Health Records Management API",
    version="1.0.0",
    docs_url="/docs",
    redoc_url="/redoc"
)

# CORS Configuration
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
    expose_headers=["*"]
)

# Include API routes
app.include_router(api_router, prefix="/api/v1")

@app.get("/")
async def root():
    logger.info("Root endpoint accessed")
    return {"message": "🚀 FastAPI with MongoDB + JWT is running", "status": "healthy"}

@app.post("/login")
async def redirect_login(request: Request):
    logger.info(f"Redirecting /login to /auth/login from {request.client.host}")
    return RedirectResponse(url="/auth/login", status_code=status.HTTP_307_TEMPORARY_REDIRECT)

@app.exception_handler(RequestValidationError)
async def validation_exception_handler(request: Request, exc: RequestValidationError):
    logger.error(f"Validation error: {exc.errors()}")
    return JSONResponse(
        status_code=status.HTTP_422_UNPROCESSABLE_ENTITY,
        content={"detail": exc.errors(), "body": exc.body},
    )

@app.exception_handler(HTTPException)
async def http_exception_handler(request: Request, exc: HTTPException):
    logger.error(f"HTTP error: {exc.detail}")
    return JSONResponse(
        status_code=exc.status_code,
        content={"detail": exc.detail},
        headers=exc.headers
    )

@app.exception_handler(Exception)
async def general_exception_handler(request: Request, exc: Exception):
    logger.error(f"Unhandled exception: {str(exc)}", exc_info=True)
    return JSONResponse(
        status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
        content={"detail": "Internal server error"},
    )

# Gradio Interface Configuration
BACKEND_URL = os.getenv("BACKEND_URL", "http://localhost:8000")

def create_doctor(full_name: str, email: str, matricule: str, password: str, specialty: str):
    try:
        payload = {
            "full_name": full_name,
            "email": email,
            "license_number": matricule,
            "password": password,
            "specialty": specialty,
        }
        
        logger.info(f"Attempting to create doctor: {email}")
        response = requests.post(
            f"{BACKEND_URL}/auth/admin/doctors",
            json=payload,
            headers={"Content-Type": "application/json"},
            timeout=10
        )
        
        if response.status_code == 201:
            logger.info(f"Successfully created doctor: {email}")
            return "✅ Doctor created successfully!"
        else:
            error_msg = response.json().get("detail", "Unknown error occurred")
            logger.error(f"Failed to create doctor {email}: {error_msg}")
            return f"❌ Error: {error_msg}"
            
    except requests.exceptions.RequestException as e:
        logger.error(f"Network error during doctor creation: {str(e)}")
        return f"❌ Network Error: {str(e)}"
    except Exception as e:
        logger.error(f"Unexpected error during doctor creation: {str(e)}")
        return f"❌ Unexpected Error: {str(e)}"

def setup_gradio_interface():
    with gr.Blocks(
        title="Doctor Management Portal",
        css="""
        .gradio-container { max-width: 800px; margin: 0 auto; }
        .success { color: #4CAF50; }
        .error { color: #F44336; }
        """
    ) as interface:
        gr.Markdown("# 👨‍⚕️ Doctor Account Management")
        
        with gr.Row():
            with gr.Column():
                full_name = gr.Textbox(label="Full Name", placeholder="Dr. John Smith")
                email = gr.Textbox(label="Email", placeholder="doctor@hospital.org")
                matricule = gr.Textbox(label="License Number", placeholder="MD-12345")
                specialty = gr.Dropdown(
                    label="Specialty",
                    choices=["Cardiology", "Neurology", "Pediatrics", "General Practice"],
                    value="General Practice"
                )
                password = gr.Textbox(label="Password", type="password")
                submit_btn = gr.Button("Create Doctor Account", variant="primary")
                
            with gr.Column():
                output = gr.Textbox(label="Result", interactive=False)
                
        submit_btn.click(
            fn=create_doctor,
            inputs=[full_name, email, matricule, specialty, password],
            outputs=output
        )
        
    return interface

# Mount Gradio interface
gradio_ui = setup_gradio_interface()
app = gr.mount_gradio_app(app, gradio_ui, path="/admin")

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(
        app,
        host="0.0.0.0",
        port=int(os.getenv("PORT", 8000)),
        log_level="info",
        reload=True
    )