"""
Authentication routes for gateway
"""

from fastapi import APIRouter, Request, HTTPException
from fastapi.responses import JSONResponse
import httpx
import logging

from app.core.config import settings
from app.core.service_discovery import ServiceDiscovery

logger = logging.getLogger(__name__)
router = APIRouter()

service_discovery = ServiceDiscovery()

@router.post("/login")
async def login(request: Request):
    """Proxy login request to auth service"""
    try:
        body = await request.body()
        
        async with httpx.AsyncClient(timeout=10.0) as client:
            response = await client.post(
                f"{settings.AUTH_SERVICE_URL}/login",
                content=body,
                headers={"Content-Type": "application/json"}
            )
            
            if response.status_code == 200:
                return response.json()
            else:
                return JSONResponse(
                    status_code=response.status_code,
                    content=response.json()
                )
                
    except httpx.RequestError as e:
        logger.error(f"Auth service unavailable: {e}")
        raise HTTPException(
            status_code=503,
            detail="Authentication service unavailable"
        )
    except Exception as e:
        logger.error(f"Login error: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")

@router.post("/register")
async def register(request: Request):
    """Proxy register request to auth service"""
    try:
        body = await request.body()
        
        async with httpx.AsyncClient(timeout=10.0) as client:
            response = await client.post(
                f"{settings.AUTH_SERVICE_URL}/register",
                content=body,
                headers={"Content-Type": "application/json"}
            )
            
            return JSONResponse(
                status_code=response.status_code,
                content=response.json()
            )
            
    except httpx.RequestError as e:
        logger.error(f"Auth service unavailable: {e}")
        raise HTTPException(
            status_code=503,
            detail="Authentication service unavailable"
        )
    except Exception as e:
        logger.error(f"Register error: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")

@router.post("/refresh")
async def refresh_token(request: Request):
    """Proxy refresh token request to auth service"""
    try:
        body = await request.body()
        
        async with httpx.AsyncClient(timeout=10.0) as client:
            response = await client.post(
                f"{settings.AUTH_SERVICE_URL}/refresh",
                content=body,
                headers={"Content-Type": "application/json"}
            )
            
            return JSONResponse(
                status_code=response.status_code,
                content=response.json()
            )
            
    except httpx.RequestError as e:
        logger.error(f"Auth service unavailable: {e}")
        raise HTTPException(
            status_code=503,
            detail="Authentication service unavailable"
        )
    except Exception as e:
        logger.error(f"Refresh token error: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")

@router.post("/verify")
async def verify_token(request: Request):
    """Proxy token verification to auth service"""
    try:
        auth_header = request.headers.get("Authorization")
        if not auth_header:
            raise HTTPException(status_code=401, detail="Authorization header required")
        
        async with httpx.AsyncClient(timeout=5.0) as client:
            response = await client.post(
                f"{settings.AUTH_SERVICE_URL}/verify",
                headers={"Authorization": auth_header}
            )
            
            return JSONResponse(
                status_code=response.status_code,
                content=response.json()
            )
            
    except httpx.RequestError as e:
        logger.error(f"Auth service unavailable: {e}")
        raise HTTPException(
            status_code=503,
            detail="Authentication service unavailable"
        )
    except Exception as e:
        logger.error(f"Token verification error: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")

@router.post("/logout")
async def logout(request: Request):
    """Proxy logout request to auth service"""
    try:
        auth_header = request.headers.get("Authorization")
        if not auth_header:
            raise HTTPException(status_code=401, detail="Authorization header required")
        
        async with httpx.AsyncClient(timeout=5.0) as client:
            response = await client.post(
                f"{settings.AUTH_SERVICE_URL}/logout",
                headers={"Authorization": auth_header}
            )
            
            return JSONResponse(
                status_code=response.status_code,
                content=response.json()
            )
            
    except httpx.RequestError as e:
        logger.error(f"Auth service unavailable: {e}")
        raise HTTPException(
            status_code=503,
            detail="Authentication service unavailable"
        )
    except Exception as e:
        logger.error(f"Logout error: {e}")
        raise HTTPException(status_code=500, detail="Internal server error")