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import os
import jwt
import hashlib
from datetime import datetime, timedelta
from fastapi import APIRouter, HTTPException, Depends, Header
from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
from pydantic import BaseModel
from sqlalchemy.orm import Session
from ..database import SessionLocal
from ..config import settings
from .. import crud
router = APIRouter()
security = HTTPBearer()
# Models
class AdminLoginRequest(BaseModel):
password: str
class AdminLoginResponse(BaseModel):
access_token: str
token_type: str = "bearer"
expires_at: str
class AdminVerifyResponse(BaseModel):
valid: bool
message: str
def get_db():
db = SessionLocal()
try:
yield db
finally:
db.close()
def get_admin_password():
"""Get admin password from environment variable"""
password = os.getenv('ADMIN_PASSWORD')
if not password:
raise HTTPException(
status_code=500,
detail="ADMIN_PASSWORD environment variable not set"
)
return password
def create_admin_token():
"""Create a JWT token for admin authentication"""
# In production, use a proper secret key
secret_key = os.getenv('JWT_SECRET_KEY', 'your-secret-key-change-in-production')
payload = {
'role': 'admin',
'exp': datetime.utcnow() + timedelta(hours=24), # 24 hour expiry
'iat': datetime.utcnow()
}
token = jwt.encode(payload, secret_key, algorithm='HS256')
return token
def verify_admin_token(token: str):
"""Verify the admin JWT token"""
try:
secret_key = os.getenv('JWT_SECRET_KEY', 'your-secret-key-change-in-production')
payload = jwt.decode(token, secret_key, algorithms=['HS256'])
if payload.get('role') != 'admin':
return False
# Check if token is expired
exp = payload.get('exp')
if exp and datetime.utcnow() > datetime.fromtimestamp(exp):
return False
return True
except jwt.ExpiredSignatureError:
return False
except jwt.InvalidTokenError:
return False
@router.post("/login", response_model=AdminLoginResponse)
async def admin_login(request: AdminLoginRequest):
"""Admin login endpoint"""
admin_password = get_admin_password()
# Hash the provided password and compare with stored hash
# For now, using simple comparison (in production, use proper hashing)
if request.password == admin_password:
token = create_admin_token()
expires_at = datetime.utcnow() + timedelta(hours=24)
return AdminLoginResponse(
access_token=token,
expires_at=expires_at.isoformat()
)
else:
raise HTTPException(
status_code=401,
detail="Invalid admin password"
)
@router.post("/verify", response_model=AdminVerifyResponse)
async def verify_admin(credentials: HTTPAuthorizationCredentials = Depends(security)):
"""Verify admin token endpoint"""
token = credentials.credentials
if verify_admin_token(token):
return AdminVerifyResponse(
valid=True,
message="Token is valid"
)
else:
return AdminVerifyResponse(
valid=False,
message="Token is invalid or expired"
)
@router.get("/status")
async def admin_status(credentials: HTTPAuthorizationCredentials = Depends(security)):
"""Get admin status (protected endpoint)"""
token = credentials.credentials
if not verify_admin_token(token):
raise HTTPException(
status_code=401,
detail="Invalid or expired token"
)
return {
"status": "authenticated",
"role": "admin",
"timestamp": datetime.utcnow().isoformat()
}
# Model Management Endpoints
class ModelCreateRequest(BaseModel):
m_code: str
label: str
model_type: str
provider: str
model_id: str
is_available: bool = False
class ModelUpdateRequest(BaseModel):
label: str | None = None
model_type: str | None = None
provider: str | None = None
model_id: str | None = None
is_available: bool | None = None
is_fallback: bool | None = None
@router.post("/models", response_model=dict)
async def create_model(
request: ModelCreateRequest,
credentials: HTTPAuthorizationCredentials = Depends(security),
db: Session = Depends(get_db)
):
"""Create a new model (admin only)"""
token = credentials.credentials
if not verify_admin_token(token):
raise HTTPException(
status_code=401,
detail="Invalid or expired token"
)
try:
# Check if model already exists
existing_model = crud.get_model(db, request.m_code)
if existing_model:
raise HTTPException(
status_code=400,
detail=f"Model with code '{request.m_code}' already exists"
)
# Create new model
new_model = crud.create_model(
db,
m_code=request.m_code,
label=request.label,
model_type=request.model_type,
provider=request.provider,
model_id=request.model_id,
is_available=request.is_available
)
return {
"message": "Model created successfully",
"model": {
"m_code": new_model.m_code,
"label": new_model.label,
"model_type": new_model.model_type,
"provider": new_model.provider,
"model_id": new_model.model_id,
"is_available": new_model.is_available
}
}
except Exception as e:
raise HTTPException(
status_code=500,
detail=f"Failed to create model: {str(e)}"
)
@router.put("/models/{model_code}", response_model=dict)
async def update_model(
model_code: str,
request: ModelUpdateRequest,
credentials: HTTPAuthorizationCredentials = Depends(security),
db: Session = Depends(get_db)
):
"""Update an existing model (admin only)"""
token = credentials.credentials
if not verify_admin_token(token):
raise HTTPException(
status_code=401,
detail="Invalid or expired token"
)
try:
# Check if model exists
existing_model = crud.get_model(db, model_code)
if not existing_model:
raise HTTPException(
status_code=404,
detail=f"Model '{model_code}' not found"
)
# Handle fallback model setting specially
if request.is_fallback is not None and request.is_fallback:
# Set this model as fallback (will clear others)
crud.set_fallback_model(db, model_code)
updated_model = crud.get_model(db, model_code)
else:
# Update model fields normally
update_data = {}
if request.label is not None:
update_data["label"] = request.label
if request.model_type is not None:
update_data["model_type"] = request.model_type
if request.is_available is not None:
update_data["is_available"] = request.is_available
if request.is_fallback is not None and not request.is_fallback:
update_data["is_fallback"] = False
# Update config column for provider and model_id
config_updates = {}
if request.provider is not None:
config_updates["provider"] = request.provider
if request.model_id is not None:
config_updates["model_id"] = request.model_id
if config_updates:
# Get current config or create empty dict
current_config = existing_model.config or {}
# Merge with updates
updated_config = {**current_config, **config_updates}
update_data["config"] = updated_config
updated_model = crud.update_model(db, model_code, update_data)
return {
"message": "Model updated successfully",
"model": {
"m_code": updated_model.m_code,
"label": updated_model.label,
"model_type": updated_model.model_type,
"is_available": updated_model.is_available,
"config": updated_model.config or {}
}
}
except Exception as e:
raise HTTPException(
status_code=500,
detail=f"Failed to update model: {str(e)}"
)
@router.get("/fallback-model", response_model=dict)
async def get_fallback_model(
credentials: HTTPAuthorizationCredentials = Depends(security),
db: Session = Depends(get_db)
):
"""Get the current fallback model"""
token = credentials.credentials
if not verify_admin_token(token):
raise HTTPException(
status_code=401,
detail="Invalid or expired token"
)
try:
fallback_model_code = crud.get_fallback_model(db)
if fallback_model_code:
fallback_model = crud.get_model(db, fallback_model_code)
return {
"fallback_model": {
"m_code": fallback_model.m_code,
"label": fallback_model.label,
"is_available": fallback_model.is_available
}
}
else:
return {"fallback_model": None}
except Exception as e:
raise HTTPException(
status_code=500,
detail=f"Failed to get fallback model: {str(e)}"
)
@router.delete("/models/{model_code}", response_model=dict)
async def delete_model(
model_code: str,
credentials: HTTPAuthorizationCredentials = Depends(security),
db: Session = Depends(get_db)
):
"""Delete a model (admin only)"""
token = credentials.credentials
if not verify_admin_token(token):
raise HTTPException(
status_code=401,
detail="Invalid or expired token"
)
try:
# Check if model exists
existing_model = crud.get_model(db, model_code)
if not existing_model:
raise HTTPException(
status_code=404,
detail=f"Model '{model_code}' not found"
)
# Check if model is being used by any captions
from ..models import Captions
caption_count = db.query(Captions).filter(Captions.model == model_code).count()
if caption_count > 0:
raise HTTPException(
status_code=400,
detail=f"Cannot delete model '{model_code}' - it is used by {caption_count} caption(s)"
)
# Hard delete model (remove from database)
crud.delete_model(db, model_code)
return {
"message": f"Model '{model_code}' deleted successfully from database"
}
except Exception as e:
raise HTTPException(
status_code=500,
detail=f"Failed to delete model: {str(e)}"
)
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