"""
Secure MCP API endpoints

This module provides API endpoints for the secure MCP credential architecture:
1. Credential management (store, retrieve, test, delete)
2. Credential profile management (create, set default, delete)
"""

from fastapi import APIRouter, HTTPException, Depends
from typing import List, Optional, Dict, Any
from pydantic import BaseModel, validator
import asyncio
import urllib.parse

from utils.logger import logger
from utils.auth_utils import get_current_user_id_from_jwt
from .credential_manager import credential_manager, MCPCredential

router = APIRouter()

class StoreCredentialRequest(BaseModel):
    """Request model for storing MCP credentials"""
    mcp_qualified_name: str
    display_name: str
    config: Dict[str, Any]
    
    @validator('config')
    def validate_config_not_empty(cls, v):
        if not v:
            raise ValueError('Config cannot be empty')
        return v

class StoreCredentialProfileRequest(BaseModel):
    """Request model for storing MCP credential profiles"""
    mcp_qualified_name: str
    profile_name: str
    display_name: str
    config: Dict[str, Any]
    is_default: bool = False
    
    @validator('config')
    def validate_config_not_empty(cls, v):
        if not v:
            raise ValueError('Config cannot be empty')
        return v

class CredentialResponse(BaseModel):
    """Response model for MCP credentials (without sensitive data)"""
    credential_id: str
    mcp_qualified_name: str
    display_name: str
    config_keys: List[str]
    is_active: bool
    last_used_at: Optional[str]
    created_at: str
    updated_at: str

class CredentialProfileResponse(BaseModel):
    """Response model for MCP credential profiles (without sensitive data)"""
    profile_id: str
    mcp_qualified_name: str
    profile_name: str
    display_name: str
    config_keys: List[str]
    is_active: bool
    is_default: bool
    last_used_at: Optional[str]
    created_at: str
    updated_at: str

class SetDefaultProfileRequest(BaseModel):
    """Request model for setting default profile"""
    profile_id: str

class TestCredentialResponse(BaseModel):
    """Response model for credential testing"""
    success: bool
    message: str
    error_details: Optional[str] = None



@router.post("/credentials", response_model=CredentialResponse)
async def store_mcp_credential(
    request: StoreCredentialRequest,
    user_id: str = Depends(get_current_user_id_from_jwt)
):
    """Store encrypted MCP credentials for the current user"""
    logger.info(f"Storing credential for {request.mcp_qualified_name} for user {user_id}")
    
    try:
        credential_id = await credential_manager.store_credential(
            account_id=user_id,
            mcp_qualified_name=request.mcp_qualified_name,
            display_name=request.display_name,
            config=request.config
        )
        
        # Return credential info without sensitive data
        credential = await credential_manager.get_credential(user_id, request.mcp_qualified_name)
        if not credential:
            raise HTTPException(status_code=500, detail="Failed to retrieve stored credential")
        
        return CredentialResponse(
            credential_id=credential.credential_id,
            mcp_qualified_name=credential.mcp_qualified_name,
            display_name=credential.display_name,
            config_keys=list(credential.config.keys()),
            is_active=credential.is_active,
            last_used_at=credential.last_used_at.isoformat() if credential.last_used_at and hasattr(credential.last_used_at, 'isoformat') else (str(credential.last_used_at) if credential.last_used_at else None),
            created_at=credential.created_at.isoformat() if credential.created_at and hasattr(credential.created_at, 'isoformat') else (str(credential.created_at) if credential.created_at else ""),
            updated_at=credential.updated_at.isoformat() if credential.updated_at and hasattr(credential.updated_at, 'isoformat') else (str(credential.updated_at) if credential.updated_at else "")
        )
        
    except Exception as e:
        logger.error(f"Error storing credential: {str(e)}")
        raise HTTPException(status_code=500, detail=f"Failed to store credential: {str(e)}")

@router.get("/credentials", response_model=List[CredentialResponse])
async def get_user_credentials(
    user_id: str = Depends(get_current_user_id_from_jwt)
):
    """Get all MCP credentials for the current user"""
    logger.info(f"Getting credentials for user {user_id}")
    
    try:
        credentials = await credential_manager.get_user_credentials(user_id)
        
        logger.debug(f"Found {len(credentials)} credentials for user {user_id}")
        for cred in credentials:
            logger.debug(f"Credential: '{cred.mcp_qualified_name}' (ID: {cred.credential_id})")
        
        return [
            CredentialResponse(
                credential_id=cred.credential_id,
                mcp_qualified_name=cred.mcp_qualified_name,
                display_name=cred.display_name,
                config_keys=list(cred.config.keys()),
                is_active=cred.is_active,
                last_used_at=cred.last_used_at.isoformat() if cred.last_used_at and hasattr(cred.last_used_at, 'isoformat') else (str(cred.last_used_at) if cred.last_used_at else None),
                created_at=cred.created_at.isoformat() if cred.created_at and hasattr(cred.created_at, 'isoformat') else (str(cred.created_at) if cred.created_at else ""),
                updated_at=cred.updated_at.isoformat() if cred.updated_at and hasattr(cred.updated_at, 'isoformat') else (str(cred.updated_at) if cred.updated_at else "")
            )
            for cred in credentials
        ]
        
    except Exception as e:
        logger.error(f"Error getting user credentials: {str(e)}")
        raise HTTPException(status_code=500, detail=f"Failed to get credentials: {str(e)}")

@router.delete("/credentials/{mcp_qualified_name:path}")
async def delete_mcp_credential(
    mcp_qualified_name: str,
    user_id: str = Depends(get_current_user_id_from_jwt)
):
    """Delete (deactivate) an MCP credential"""
    # URL decode the mcp_qualified_name to handle special characters like @
    decoded_name = urllib.parse.unquote(mcp_qualified_name)
    logger.info(f"Deleting credential for '{decoded_name}' (raw: '{mcp_qualified_name}') for user {user_id}")
    
    try:
        # First check if the credential exists
        existing_credential = await credential_manager.get_credential(user_id, decoded_name)
        if not existing_credential:
            logger.warning(f"Credential not found: '{decoded_name}' for user {user_id}")
            raise HTTPException(status_code=404, detail=f"Credential not found: {decoded_name}")
        
        success = await credential_manager.delete_credential(user_id, decoded_name)
        
        if not success:
            logger.error(f"Failed to delete credential: '{decoded_name}' for user {user_id}")
            raise HTTPException(status_code=404, detail="Credential not found")
        
        logger.info(f"Successfully deleted credential: '{decoded_name}' for user {user_id}")
        return {"message": "Credential deleted successfully"}
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error deleting credential '{decoded_name}': {str(e)}")
        raise HTTPException(status_code=500, detail=f"Failed to delete credential: {str(e)}")

@router.post("/credential-profiles", response_model=CredentialProfileResponse)
async def store_credential_profile(
    request: StoreCredentialProfileRequest,
    user_id: str = Depends(get_current_user_id_from_jwt)
):
    """Store a named credential profile for an MCP server"""
    logger.info(f"Storing credential profile '{request.profile_name}' for {request.mcp_qualified_name} for user {user_id}")
    
    try:
        profile_id = await credential_manager.store_credential_profile(
            account_id=user_id,
            mcp_qualified_name=request.mcp_qualified_name,
            profile_name=request.profile_name,
            display_name=request.display_name,
            config=request.config,
            is_default=request.is_default
        )
        
        # Return profile info without sensitive data
        profile = await credential_manager.get_credential_by_profile(user_id, profile_id)
        if not profile:
            raise HTTPException(status_code=500, detail="Failed to retrieve stored credential profile")
        
        return CredentialProfileResponse(
            profile_id=profile.profile_id,
            mcp_qualified_name=profile.mcp_qualified_name,
            profile_name=profile.profile_name,
            display_name=profile.display_name,
            config_keys=list(profile.config.keys()),
            is_active=profile.is_active,
            is_default=profile.is_default,
            last_used_at=profile.last_used_at.isoformat() if profile.last_used_at and hasattr(profile.last_used_at, 'isoformat') else (str(profile.last_used_at) if profile.last_used_at else None),
            created_at=profile.created_at.isoformat() if profile.created_at and hasattr(profile.created_at, 'isoformat') else (str(profile.created_at) if profile.created_at else ""),
            updated_at=profile.updated_at.isoformat() if profile.updated_at and hasattr(profile.updated_at, 'isoformat') else (str(profile.updated_at) if profile.updated_at else "")
        )
        
    except Exception as e:
        logger.error(f"Error storing credential profile: {str(e)}")
        raise HTTPException(status_code=500, detail=f"Failed to store credential profile: {str(e)}")

@router.get("/credential-profiles", response_model=List[CredentialProfileResponse])
async def get_all_user_credential_profiles(
    user_id: str = Depends(get_current_user_id_from_jwt)
):
    """Get all credential profiles for the current user across all MCP servers"""
    logger.info(f"Getting all credential profiles for user {user_id}")
    
    try:
        profiles = await credential_manager.get_all_user_credential_profiles(user_id)
        
        return [
            CredentialProfileResponse(
                profile_id=profile.profile_id,
                mcp_qualified_name=profile.mcp_qualified_name,
                profile_name=profile.profile_name,
                display_name=profile.display_name,
                config_keys=list(profile.config.keys()),
                is_active=profile.is_active,
                is_default=profile.is_default,
                last_used_at=profile.last_used_at.isoformat() if profile.last_used_at and hasattr(profile.last_used_at, 'isoformat') else (str(profile.last_used_at) if profile.last_used_at else None),
                created_at=profile.created_at.isoformat() if profile.created_at and hasattr(profile.created_at, 'isoformat') else (str(profile.created_at) if profile.created_at else ""),
                updated_at=profile.updated_at.isoformat() if profile.updated_at and hasattr(profile.updated_at, 'isoformat') else (str(profile.updated_at) if profile.updated_at else "")
            )
            for profile in profiles
        ]
        
    except Exception as e:
        logger.error(f"Error getting user credential profiles: {str(e)}")
        raise HTTPException(status_code=500, detail=f"Failed to get credential profiles: {str(e)}")

@router.get("/credential-profiles/{mcp_qualified_name:path}", response_model=List[CredentialProfileResponse])
async def get_credential_profiles_for_mcp(
    mcp_qualified_name: str,
    user_id: str = Depends(get_current_user_id_from_jwt)
):
    """Get all credential profiles for a specific MCP server"""
    decoded_name = urllib.parse.unquote(mcp_qualified_name)
    logger.info(f"Getting credential profiles for '{decoded_name}' for user {user_id}")
    
    try:
        profiles = await credential_manager.get_credential_profiles(user_id, decoded_name)
        
        return [
            CredentialProfileResponse(
                profile_id=profile.profile_id,
                mcp_qualified_name=profile.mcp_qualified_name,
                profile_name=profile.profile_name,
                display_name=profile.display_name,
                config_keys=list(profile.config.keys()),
                is_active=profile.is_active,
                is_default=profile.is_default,
                last_used_at=profile.last_used_at.isoformat() if profile.last_used_at and hasattr(profile.last_used_at, 'isoformat') else (str(profile.last_used_at) if profile.last_used_at else None),
                created_at=profile.created_at.isoformat() if profile.created_at and hasattr(profile.created_at, 'isoformat') else (str(profile.created_at) if profile.created_at else ""),
                updated_at=profile.updated_at.isoformat() if profile.updated_at and hasattr(profile.updated_at, 'isoformat') else (str(profile.updated_at) if profile.updated_at else "")
            )
            for profile in profiles
        ]
        
    except Exception as e:
        logger.error(f"Error getting credential profiles for {decoded_name}: {str(e)}")
        raise HTTPException(status_code=500, detail=f"Failed to get credential profiles: {str(e)}")

@router.get("/credential-profiles/profile/{profile_id}", response_model=CredentialProfileResponse)
async def get_credential_profile_by_id(
    profile_id: str,
    user_id: str = Depends(get_current_user_id_from_jwt)
):
    """Get a specific credential profile by its ID"""
    logger.info(f"Getting credential profile {profile_id} for user {user_id}")
    
    try:
        profile = await credential_manager.get_credential_by_profile(user_id, profile_id)
        
        if not profile:
            raise HTTPException(status_code=404, detail="Credential profile not found")
        
        return CredentialProfileResponse(
            profile_id=profile.profile_id,
            mcp_qualified_name=profile.mcp_qualified_name,
            profile_name=profile.profile_name,
            display_name=profile.display_name,
            config_keys=list(profile.config.keys()),
            is_active=profile.is_active,
            is_default=profile.is_default,
            last_used_at=profile.last_used_at.isoformat() if profile.last_used_at and hasattr(profile.last_used_at, 'isoformat') else (str(profile.last_used_at) if profile.last_used_at else None),
            created_at=profile.created_at.isoformat() if profile.created_at and hasattr(profile.created_at, 'isoformat') else (str(profile.created_at) if profile.created_at else ""),
            updated_at=profile.updated_at.isoformat() if profile.updated_at and hasattr(profile.updated_at, 'isoformat') else (str(profile.updated_at) if profile.updated_at else "")
        )
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error getting credential profile {profile_id}: {str(e)}")
        raise HTTPException(status_code=500, detail=f"Failed to get credential profile: {str(e)}")

@router.put("/credential-profiles/{profile_id}/set-default")
async def set_default_credential_profile(
    profile_id: str,
    user_id: str = Depends(get_current_user_id_from_jwt)
):
    """Set a credential profile as the default for its MCP server"""
    logger.info(f"Setting credential profile {profile_id} as default for user {user_id}")
    
    try:
        success = await credential_manager.set_default_profile(user_id, profile_id)
        
        if not success:
            raise HTTPException(status_code=404, detail="Credential profile not found")
        
        return {"message": "Default profile set successfully"}
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error setting default profile {profile_id}: {str(e)}")
        raise HTTPException(status_code=500, detail=f"Failed to set default profile: {str(e)}")

@router.delete("/credential-profiles/{profile_id}")
async def delete_credential_profile(
    profile_id: str,
    user_id: str = Depends(get_current_user_id_from_jwt)
):
    """Delete (deactivate) a credential profile"""
    logger.info(f"Deleting credential profile {profile_id} for user {user_id}")
    
    try:
        success = await credential_manager.delete_credential_profile(user_id, profile_id)
        
        if not success:
            raise HTTPException(status_code=404, detail="Credential profile not found")
        
        return {"message": "Credential profile deleted successfully"}
        
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"Error deleting credential profile {profile_id}: {str(e)}")
        raise HTTPException(status_code=500, detail=f"Failed to delete credential profile: {str(e)}")