import logging

from flask import make_response, redirect, request
from flask_restx import Resource, reqparse
from werkzeug.exceptions import BadRequest, Forbidden

from configs import dify_config
from controllers.console import api
from controllers.console.wraps import account_initialization_required, setup_required
from core.model_runtime.utils.encoders import jsonable_encoder
from core.plugin.entities.plugin import TriggerProviderID
from core.plugin.entities.plugin_daemon import CredentialType
from core.plugin.impl.oauth import OAuthHandler
from libs.login import current_user, login_required
from models.account import Account
from services.plugin.oauth_service import OAuthProxyService
from services.trigger.trigger_provider_service import TriggerProviderService

logger = logging.getLogger(__name__)


class TriggerProviderListApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    def get(self):
        """List all trigger providers for the current tenant"""
        user = current_user
        assert isinstance(user, Account)
        assert user.current_tenant_id is not None
        return jsonable_encoder(TriggerProviderService.list_trigger_providers(user.current_tenant_id))


class TriggerProviderCredentialListApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    def get(self, provider):
        """List all trigger providers for the current tenant"""
        user = current_user
        assert isinstance(user, Account)
        assert user.current_tenant_id is not None
        if not user.is_admin_or_owner:
            raise Forbidden()

        try:
            return jsonable_encoder(
                TriggerProviderService.list_trigger_provider_credentials(
                    tenant_id=user.current_tenant_id, provider_id=TriggerProviderID(provider)
                )
            )
        except Exception as e:
            logger.exception("Error listing trigger providers", exc_info=e)
            raise


class TriggerProviderCredentialsAddApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    def post(self, provider):
        """Add a new credential instance for a trigger provider"""
        user = current_user
        assert isinstance(user, Account)
        assert user.current_tenant_id is not None
        if not user.is_admin_or_owner:
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("credential_type", type=str, required=True, nullable=False, location="json")
        parser.add_argument("credentials", type=dict, required=True, nullable=False, location="json")
        parser.add_argument("name", type=str, required=False, nullable=True, location="json")
        parser.add_argument("expires_at", type=int, required=False, nullable=True, location="json", default=-1)
        args = parser.parse_args()

        try:
            # Parse credential type
            try:
                credential_type = CredentialType(args["credential_type"])
            except ValueError:
                raise BadRequest(f"Invalid credential_type. Must be one of: {[t.value for t in CredentialType]}")

            result = TriggerProviderService.add_trigger_provider(
                tenant_id=user.current_tenant_id,
                user_id=user.id,
                provider_id=TriggerProviderID(provider),
                credential_type=credential_type,
                credentials=args["credentials"],
                name=args.get("name"),
                expires_at=args.get("expires_at", -1),
            )

            return result

        except ValueError as e:
            raise BadRequest(str(e))
        except Exception as e:
            logger.exception("Error adding provider credential", exc_info=e)
            raise


class TriggerProviderCredentialsUpdateApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    def post(self, credential_id):
        """Update an existing credential instance"""
        user = current_user
        assert isinstance(user, Account)
        assert user.current_tenant_id is not None
        if not user.is_admin_or_owner:
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("credentials", type=dict, required=False, nullable=True, location="json")
        parser.add_argument("name", type=str, required=False, nullable=True, location="json")
        args = parser.parse_args()

        try:
            result = TriggerProviderService.update_trigger_provider(
                tenant_id=user.current_tenant_id,
                credential_id=credential_id,
                credentials=args.get("credentials"),
                name=args.get("name"),
            )

            return result

        except ValueError as e:
            raise BadRequest(str(e))
        except Exception as e:
            logger.exception("Error updating provider credential", exc_info=e)
            raise


class TriggerProviderCredentialsDeleteApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    def post(self, credential_id):
        """Delete a credential instance"""
        user = current_user
        assert isinstance(user, Account)
        assert user.current_tenant_id is not None
        if not user.is_admin_or_owner:
            raise Forbidden()

        try:
            result = TriggerProviderService.delete_trigger_provider(
                tenant_id=user.current_tenant_id,
                credential_id=credential_id,
            )
            return result

        except ValueError as e:
            raise BadRequest(str(e))
        except Exception as e:
            logger.exception("Error deleting provider credential", exc_info=e)
            raise


class TriggerProviderOAuthAuthorizeApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    def get(self, provider):
        """Initiate OAuth authorization flow for a trigger provider"""
        user = current_user
        assert isinstance(user, Account)
        assert user.current_tenant_id is not None

        try:
            provider_id = TriggerProviderID(provider)
            plugin_id = provider_id.plugin_id
            provider_name = provider_id.provider_name
            tenant_id = user.current_tenant_id

            # Get OAuth client configuration
            oauth_client_params = TriggerProviderService.get_oauth_client(
                tenant_id=tenant_id,
                provider_id=provider_id,
            )

            if oauth_client_params is None:
                raise Forbidden("No OAuth client configuration found for this trigger provider")

            # Create OAuth handler and proxy context
            oauth_handler = OAuthHandler()
            context_id = OAuthProxyService.create_proxy_context(
                user_id=user.id,
                tenant_id=tenant_id,
                plugin_id=plugin_id,
                provider=provider_name,
            )

            # Build redirect URI for callback
            redirect_uri = f"{dify_config.CONSOLE_API_URL}/console/api/oauth/plugin/{provider}/trigger/callback"

            # Get authorization URL
            authorization_url_response = oauth_handler.get_authorization_url(
                tenant_id=tenant_id,
                user_id=user.id,
                plugin_id=plugin_id,
                provider=provider_name,
                redirect_uri=redirect_uri,
                system_credentials=oauth_client_params,
            )

            # Create response with cookie
            response = make_response(jsonable_encoder(authorization_url_response))
            response.set_cookie(
                "context_id",
                context_id,
                httponly=True,
                samesite="Lax",
                max_age=OAuthProxyService.__MAX_AGE__,
            )

            return response

        except Exception as e:
            logger.exception("Error initiating OAuth flow", exc_info=e)
            raise


class TriggerProviderOAuthCallbackApi(Resource):
    @setup_required
    def get(self, provider):
        """Handle OAuth callback for trigger provider"""
        context_id = request.cookies.get("context_id")
        if not context_id:
            raise Forbidden("context_id not found")

        # Use and validate proxy context
        context = OAuthProxyService.use_proxy_context(context_id)
        if context is None:
            raise Forbidden("Invalid context_id")

        # Parse provider ID
        provider_id = TriggerProviderID(provider)
        plugin_id = provider_id.plugin_id
        provider_name = provider_id.provider_name
        user_id = context.get("user_id")
        tenant_id = context.get("tenant_id")

        # Get OAuth client configuration
        oauth_client_params = TriggerProviderService.get_oauth_client(
            tenant_id=tenant_id,
            provider_id=provider_id,
        )

        if oauth_client_params is None:
            raise Forbidden("No OAuth client configuration found for this trigger provider")

        # Get OAuth credentials from callback
        oauth_handler = OAuthHandler()
        redirect_uri = f"{dify_config.CONSOLE_API_URL}/console/api/oauth/plugin/{provider}/trigger/callback"

        credentials_response = oauth_handler.get_credentials(
            tenant_id=tenant_id,
            user_id=user_id,
            plugin_id=plugin_id,
            provider=provider_name,
            redirect_uri=redirect_uri,
            system_credentials=oauth_client_params,
            request=request,
        )

        credentials = credentials_response.credentials
        expires_at = credentials_response.expires_at

        if not credentials:
            raise Exception("Failed to get OAuth credentials")

        # Save OAuth credentials to database
        TriggerProviderService.add_trigger_provider(
            tenant_id=tenant_id,
            user_id=user_id,
            provider_id=provider_id,
            credential_type=CredentialType.OAUTH2,
            credentials=dict(credentials),
            expires_at=expires_at,
        )

        # Redirect to OAuth callback page
        return redirect(f"{dify_config.CONSOLE_WEB_URL}/oauth-callback")


class TriggerProviderOAuthRefreshTokenApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    def post(self, credential_id):
        """Refresh OAuth token for a trigger provider credential"""
        user = current_user
        assert isinstance(user, Account)
        assert user.current_tenant_id is not None
        if not user.is_admin_or_owner:
            raise Forbidden()

        try:
            result = TriggerProviderService.refresh_oauth_token(
                tenant_id=user.current_tenant_id,
                credential_id=credential_id,
            )
            return result

        except ValueError as e:
            raise BadRequest(str(e))
        except Exception as e:
            logger.exception("Error refreshing OAuth token", exc_info=e)
            raise


class TriggerProviderOAuthClientManageApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    def get(self, provider):
        """Get OAuth client configuration for a provider"""
        user = current_user
        assert isinstance(user, Account)
        assert user.current_tenant_id is not None
        if not user.is_admin_or_owner:
            raise Forbidden()

        try:
            provider_id = TriggerProviderID(provider)

            # Get custom OAuth client params if exists
            custom_params = TriggerProviderService.get_custom_oauth_client_params(
                tenant_id=user.current_tenant_id,
                provider_id=provider_id,
            )

            # Check if custom client is enabled
            is_custom_enabled = TriggerProviderService.is_oauth_custom_client_enabled(
                tenant_id=user.current_tenant_id,
                provider_id=provider_id,
            )

            # Check if there's a system OAuth client
            system_client = TriggerProviderService.get_oauth_client(
                tenant_id=user.current_tenant_id,
                provider_id=provider_id,
            )

            return {
                "configured": bool(custom_params or system_client),
                "custom_configured": bool(custom_params),
                "custom_enabled": is_custom_enabled,
                "params": custom_params if custom_params else {},
            }

        except Exception as e:
            logger.exception("Error getting OAuth client", exc_info=e)
            raise

    @setup_required
    @login_required
    @account_initialization_required
    def post(self, provider):
        """Configure custom OAuth client for a provider"""
        user = current_user
        assert isinstance(user, Account)
        assert user.current_tenant_id is not None
        if not user.is_admin_or_owner:
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("client_params", type=dict, required=False, nullable=True, location="json")
        parser.add_argument("enabled", type=bool, required=False, nullable=True, location="json")
        args = parser.parse_args()

        try:
            provider_id = TriggerProviderID(provider)
            return TriggerProviderService.save_custom_oauth_client_params(
                tenant_id=user.current_tenant_id,
                provider_id=provider_id,
                client_params=args.get("client_params"),
                enabled=args.get("enabled"),
            )

        except ValueError as e:
            raise BadRequest(str(e))
        except Exception as e:
            logger.exception("Error configuring OAuth client", exc_info=e)
            raise

    @setup_required
    @login_required
    @account_initialization_required
    def delete(self, provider):
        """Remove custom OAuth client configuration"""
        user = current_user
        assert isinstance(user, Account)
        assert user.current_tenant_id is not None
        if not user.is_admin_or_owner:
            raise Forbidden()

        try:
            provider_id = TriggerProviderID(provider)

            return TriggerProviderService.delete_custom_oauth_client_params(
                tenant_id=user.current_tenant_id,
                provider_id=provider_id,
            )
        except ValueError as e:
            raise BadRequest(str(e))
        except Exception as e:
            logger.exception("Error removing OAuth client", exc_info=e)
            raise


# Trigger provider endpoints
api.add_resource(
    TriggerProviderCredentialListApi, "/workspaces/current/trigger-provider/credentials/<path:provider>/list"
)
api.add_resource(
    TriggerProviderCredentialsAddApi, "/workspaces/current/trigger-provider/credentials/<path:provider>/add"
)
api.add_resource(
    TriggerProviderCredentialsUpdateApi, "/workspaces/current/trigger-provider/credentials/<path:credential_id>/update"
)
api.add_resource(
    TriggerProviderCredentialsDeleteApi, "/workspaces/current/trigger-provider/credentials/<path:credential_id>/delete"
)

# OAuth
api.add_resource(
    TriggerProviderOAuthAuthorizeApi, "/workspaces/current/trigger-provider/<path:provider>/oauth/authorize"
)
api.add_resource(TriggerProviderOAuthCallbackApi, "/oauth/plugin/<path:provider>/trigger/callback")
api.add_resource(
    TriggerProviderOAuthRefreshTokenApi,
    "/workspaces/current/trigger-provider/credentials/<path:credential_id>/oauth/refresh",
)
api.add_resource(
    TriggerProviderOAuthClientManageApi, "/workspaces/current/trigger-provider/<path:provider>/oauth/client"
)