import json
import logging
from typing import cast

from flask import abort, request
from flask_restful import Resource, inputs, marshal_with, reqparse  # type: ignore
from sqlalchemy.orm import Session
from werkzeug.exceptions import Forbidden, InternalServerError, NotFound

import services
from configs import dify_config
from controllers.console import api
from controllers.console.app.error import (
    ConversationCompletedError,
    DraftWorkflowNotExist,
    DraftWorkflowNotSync,
)
from controllers.console.app.wraps import get_app_model
from controllers.console.wraps import account_initialization_required, setup_required
from controllers.web.error import InvokeRateLimitError as InvokeRateLimitHttpError
from core.app.apps.base_app_queue_manager import AppQueueManager
from core.app.entities.app_invoke_entities import InvokeFrom
from extensions.ext_database import db
from factories import variable_factory
from fields.workflow_fields import workflow_fields, workflow_pagination_fields
from fields.workflow_run_fields import workflow_run_node_execution_fields
from libs import helper
from libs.helper import TimestampField, uuid_value
from libs.login import current_user, login_required
from models import App
from models.account import Account
from models.model import AppMode
from services.app_generate_service import AppGenerateService
from services.errors.app import WorkflowHashNotEqualError
from services.errors.llm import InvokeRateLimitError
from services.workflow_service import DraftWorkflowDeletionError, WorkflowInUseError, WorkflowService

logger = logging.getLogger(__name__)


class DraftWorkflowApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    @marshal_with(workflow_fields)
    def get(self, app_model: App):
        """
        Get draft workflow
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        # fetch draft workflow by app_model
        workflow_service = WorkflowService()
        workflow = workflow_service.get_draft_workflow(app_model=app_model)

        if not workflow:
            raise DraftWorkflowNotExist()

        # return workflow, if not found, return None (initiate graph by frontend)
        return workflow

    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    def post(self, app_model: App):
        """
        Sync draft workflow
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        content_type = request.headers.get("Content-Type", "")

        if "application/json" in content_type:
            parser = reqparse.RequestParser()
            parser.add_argument("graph", type=dict, required=True, nullable=False, location="json")
            parser.add_argument("features", type=dict, required=True, nullable=False, location="json")
            parser.add_argument("hash", type=str, required=False, location="json")
            # TODO: set this to required=True after frontend is updated
            parser.add_argument("environment_variables", type=list, required=False, location="json")
            parser.add_argument("conversation_variables", type=list, required=False, location="json")
            args = parser.parse_args()
        elif "text/plain" in content_type:
            try:
                data = json.loads(request.data.decode("utf-8"))
                if "graph" not in data or "features" not in data:
                    raise ValueError("graph or features not found in data")

                if not isinstance(data.get("graph"), dict) or not isinstance(data.get("features"), dict):
                    raise ValueError("graph or features is not a dict")

                args = {
                    "graph": data.get("graph"),
                    "features": data.get("features"),
                    "hash": data.get("hash"),
                    "environment_variables": data.get("environment_variables"),
                    "conversation_variables": data.get("conversation_variables"),
                }
            except json.JSONDecodeError:
                return {"message": "Invalid JSON data"}, 400
        else:
            abort(415)

        if not isinstance(current_user, Account):
            raise Forbidden()

        workflow_service = WorkflowService()

        try:
            environment_variables_list = args.get("environment_variables") or []
            environment_variables = [
                variable_factory.build_environment_variable_from_mapping(obj) for obj in environment_variables_list
            ]
            conversation_variables_list = args.get("conversation_variables") or []
            conversation_variables = [
                variable_factory.build_conversation_variable_from_mapping(obj) for obj in conversation_variables_list
            ]
            workflow = workflow_service.sync_draft_workflow(
                app_model=app_model,
                graph=args["graph"],
                features=args["features"],
                unique_hash=args.get("hash"),
                account=current_user,
                environment_variables=environment_variables,
                conversation_variables=conversation_variables,
            )
        except WorkflowHashNotEqualError:
            raise DraftWorkflowNotSync()

        return {
            "result": "success",
            "hash": workflow.unique_hash,
            "updated_at": TimestampField().format(workflow.updated_at or workflow.created_at),
        }


class AdvancedChatDraftWorkflowRunApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT])
    def post(self, app_model: App):
        """
        Run draft workflow
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("inputs", type=dict, location="json")
        parser.add_argument("query", type=str, required=True, location="json", default="")
        parser.add_argument("files", type=list, location="json")
        parser.add_argument("conversation_id", type=uuid_value, location="json")
        parser.add_argument("parent_message_id", type=uuid_value, required=False, location="json")

        args = parser.parse_args()

        try:
            response = AppGenerateService.generate(
                app_model=app_model, user=current_user, args=args, invoke_from=InvokeFrom.DEBUGGER, streaming=True
            )

            return helper.compact_generate_response(response)
        except services.errors.conversation.ConversationNotExistsError:
            raise NotFound("Conversation Not Exists.")
        except services.errors.conversation.ConversationCompletedError:
            raise ConversationCompletedError()
        except InvokeRateLimitError as ex:
            raise InvokeRateLimitHttpError(ex.description)
        except ValueError as e:
            raise e
        except Exception:
            logging.exception("internal server error.")
            raise InternalServerError()


class AdvancedChatDraftRunIterationNodeApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT])
    def post(self, app_model: App, node_id: str):
        """
        Run draft workflow iteration node
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("inputs", type=dict, location="json")
        args = parser.parse_args()

        try:
            response = AppGenerateService.generate_single_iteration(
                app_model=app_model, user=current_user, node_id=node_id, args=args, streaming=True
            )

            return helper.compact_generate_response(response)
        except services.errors.conversation.ConversationNotExistsError:
            raise NotFound("Conversation Not Exists.")
        except services.errors.conversation.ConversationCompletedError:
            raise ConversationCompletedError()
        except ValueError as e:
            raise e
        except Exception:
            logging.exception("internal server error.")
            raise InternalServerError()


class WorkflowDraftRunIterationNodeApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.WORKFLOW])
    def post(self, app_model: App, node_id: str):
        """
        Run draft workflow iteration node
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("inputs", type=dict, location="json")
        args = parser.parse_args()

        try:
            response = AppGenerateService.generate_single_iteration(
                app_model=app_model, user=current_user, node_id=node_id, args=args, streaming=True
            )

            return helper.compact_generate_response(response)
        except services.errors.conversation.ConversationNotExistsError:
            raise NotFound("Conversation Not Exists.")
        except services.errors.conversation.ConversationCompletedError:
            raise ConversationCompletedError()
        except ValueError as e:
            raise e
        except Exception:
            logging.exception("internal server error.")
            raise InternalServerError()


class AdvancedChatDraftRunLoopNodeApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT])
    def post(self, app_model: App, node_id: str):
        """
        Run draft workflow loop node
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("inputs", type=dict, location="json")
        args = parser.parse_args()

        try:
            response = AppGenerateService.generate_single_loop(
                app_model=app_model, user=current_user, node_id=node_id, args=args, streaming=True
            )

            return helper.compact_generate_response(response)
        except services.errors.conversation.ConversationNotExistsError:
            raise NotFound("Conversation Not Exists.")
        except services.errors.conversation.ConversationCompletedError:
            raise ConversationCompletedError()
        except ValueError as e:
            raise e
        except Exception:
            logging.exception("internal server error.")
            raise InternalServerError()


class WorkflowDraftRunLoopNodeApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.WORKFLOW])
    def post(self, app_model: App, node_id: str):
        """
        Run draft workflow loop node
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("inputs", type=dict, location="json")
        args = parser.parse_args()

        try:
            response = AppGenerateService.generate_single_loop(
                app_model=app_model, user=current_user, node_id=node_id, args=args, streaming=True
            )

            return helper.compact_generate_response(response)
        except services.errors.conversation.ConversationNotExistsError:
            raise NotFound("Conversation Not Exists.")
        except services.errors.conversation.ConversationCompletedError:
            raise ConversationCompletedError()
        except ValueError as e:
            raise e
        except Exception:
            logging.exception("internal server error.")
            raise InternalServerError()


class DraftWorkflowRunApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.WORKFLOW])
    def post(self, app_model: App):
        """
        Run draft workflow
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("inputs", type=dict, required=True, nullable=False, location="json")
        parser.add_argument("files", type=list, required=False, location="json")
        args = parser.parse_args()

        try:
            response = AppGenerateService.generate(
                app_model=app_model,
                user=current_user,
                args=args,
                invoke_from=InvokeFrom.DEBUGGER,
                streaming=True,
            )

            return helper.compact_generate_response(response)
        except InvokeRateLimitError as ex:
            raise InvokeRateLimitHttpError(ex.description)


class WorkflowTaskStopApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    def post(self, app_model: App, task_id: str):
        """
        Stop workflow task
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        AppQueueManager.set_stop_flag(task_id, InvokeFrom.DEBUGGER, current_user.id)

        return {"result": "success"}


class DraftWorkflowNodeRunApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    @marshal_with(workflow_run_node_execution_fields)
    def post(self, app_model: App, node_id: str):
        """
        Run draft workflow node
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

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

        inputs = args.get("inputs")
        if inputs == None:
            raise ValueError("missing inputs")

        workflow_service = WorkflowService()
        workflow_node_execution = workflow_service.run_draft_workflow_node(
            app_model=app_model, node_id=node_id, user_inputs=inputs, account=current_user
        )

        return workflow_node_execution


class PublishedWorkflowApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    @marshal_with(workflow_fields)
    def get(self, app_model: App):
        """
        Get published workflow
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        # fetch published workflow by app_model
        workflow_service = WorkflowService()
        workflow = workflow_service.get_published_workflow(app_model=app_model)

        # return workflow, if not found, return None
        return workflow

    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    def post(self, app_model: App):
        """
        Publish workflow
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("marked_name", type=str, required=False, default="", location="json")
        parser.add_argument("marked_comment", type=str, required=False, default="", location="json")
        args = parser.parse_args()

        # Validate name and comment length
        if args.marked_name and len(args.marked_name) > 20:
            raise ValueError("Marked name cannot exceed 20 characters")
        if args.marked_comment and len(args.marked_comment) > 100:
            raise ValueError("Marked comment cannot exceed 100 characters")

        workflow_service = WorkflowService()
        with Session(db.engine) as session:
            workflow = workflow_service.publish_workflow(
                session=session,
                app_model=app_model,
                account=current_user,
                marked_name=args.marked_name or "",
                marked_comment=args.marked_comment or "",
            )

            app_model.workflow_id = workflow.id
            db.session.commit()

            workflow_created_at = TimestampField().format(workflow.created_at)

            session.commit()

        return {
            "result": "success",
            "created_at": workflow_created_at,
        }


class DefaultBlockConfigsApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    def get(self, app_model: App):
        """
        Get default block config
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        # Get default block configs
        workflow_service = WorkflowService()
        return workflow_service.get_default_block_configs()


class DefaultBlockConfigApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    def get(self, app_model: App, block_type: str):
        """
        Get default block config
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("q", type=str, location="args")
        args = parser.parse_args()

        q = args.get("q")

        filters = None
        if q:
            try:
                filters = json.loads(args.get("q", ""))
            except json.JSONDecodeError:
                raise ValueError("Invalid filters")

        # Get default block configs
        workflow_service = WorkflowService()
        return workflow_service.get_default_block_config(node_type=block_type, filters=filters)


class ConvertToWorkflowApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.CHAT, AppMode.COMPLETION])
    def post(self, app_model: App):
        """
        Convert basic mode of chatbot app to workflow mode
        Convert expert mode of chatbot app to workflow mode
        Convert Completion App to Workflow App
        """
        # The role of the current user in the ta table must be admin, owner, or editor
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        if request.data:
            parser = reqparse.RequestParser()
            parser.add_argument("name", type=str, required=False, nullable=True, location="json")
            parser.add_argument("icon_type", type=str, required=False, nullable=True, location="json")
            parser.add_argument("icon", type=str, required=False, nullable=True, location="json")
            parser.add_argument("icon_background", type=str, required=False, nullable=True, location="json")
            args = parser.parse_args()
        else:
            args = {}

        # convert to workflow mode
        workflow_service = WorkflowService()
        new_app_model = workflow_service.convert_to_workflow(app_model=app_model, account=current_user, args=args)

        # return app id
        return {
            "new_app_id": new_app_model.id,
        }


class WorkflowConfigApi(Resource):
    """Resource for workflow configuration."""

    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    def get(self, app_model: App):
        return {
            "parallel_depth_limit": dify_config.WORKFLOW_PARALLEL_DEPTH_LIMIT,
        }


class PublishedAllWorkflowApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    @marshal_with(workflow_pagination_fields)
    def get(self, app_model: App):
        """
        Get published workflows
        """
        if not current_user.is_editor:
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("page", type=inputs.int_range(1, 99999), required=False, default=1, location="args")
        parser.add_argument("limit", type=inputs.int_range(1, 100), required=False, default=20, location="args")
        parser.add_argument("user_id", type=str, required=False, location="args")
        parser.add_argument("named_only", type=inputs.boolean, required=False, default=False, location="args")
        args = parser.parse_args()
        page = int(args.get("page", 1))
        limit = int(args.get("limit", 10))
        user_id = args.get("user_id")
        named_only = args.get("named_only", False)

        if user_id:
            if user_id != current_user.id:
                raise Forbidden()
            user_id = cast(str, user_id)

        workflow_service = WorkflowService()
        with Session(db.engine) as session:
            workflows, has_more = workflow_service.get_all_published_workflow(
                session=session,
                app_model=app_model,
                page=page,
                limit=limit,
                user_id=user_id,
                named_only=named_only,
            )

            return {
                "items": workflows,
                "page": page,
                "limit": limit,
                "has_more": has_more,
            }


class WorkflowByIdApi(Resource):
    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    @marshal_with(workflow_fields)
    def patch(self, app_model: App, workflow_id: str):
        """
        Update workflow attributes
        """
        # Check permission
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        parser = reqparse.RequestParser()
        parser.add_argument("marked_name", type=str, required=False, location="json")
        parser.add_argument("marked_comment", type=str, required=False, location="json")
        args = parser.parse_args()

        # Validate name and comment length
        if args.marked_name and len(args.marked_name) > 20:
            raise ValueError("Marked name cannot exceed 20 characters")
        if args.marked_comment and len(args.marked_comment) > 100:
            raise ValueError("Marked comment cannot exceed 100 characters")
        args = parser.parse_args()

        # Prepare update data
        update_data = {}
        if args.get("marked_name") is not None:
            update_data["marked_name"] = args["marked_name"]
        if args.get("marked_comment") is not None:
            update_data["marked_comment"] = args["marked_comment"]

        if not update_data:
            return {"message": "No valid fields to update"}, 400

        workflow_service = WorkflowService()

        # Create a session and manage the transaction
        with Session(db.engine, expire_on_commit=False) as session:
            workflow = workflow_service.update_workflow(
                session=session,
                workflow_id=workflow_id,
                tenant_id=app_model.tenant_id,
                account_id=current_user.id,
                data=update_data,
            )

            if not workflow:
                raise NotFound("Workflow not found")

            # Commit the transaction in the controller
            session.commit()

        return workflow

    @setup_required
    @login_required
    @account_initialization_required
    @get_app_model(mode=[AppMode.ADVANCED_CHAT, AppMode.WORKFLOW])
    def delete(self, app_model: App, workflow_id: str):
        """
        Delete workflow
        """
        # Check permission
        if not current_user.is_editor:
            raise Forbidden()

        if not isinstance(current_user, Account):
            raise Forbidden()

        workflow_service = WorkflowService()

        # Create a session and manage the transaction
        with Session(db.engine) as session:
            try:
                workflow_service.delete_workflow(
                    session=session, workflow_id=workflow_id, tenant_id=app_model.tenant_id
                )
                # Commit the transaction in the controller
                session.commit()
            except WorkflowInUseError as e:
                abort(400, description=str(e))
            except DraftWorkflowDeletionError as e:
                abort(400, description=str(e))
            except ValueError as e:
                raise NotFound(str(e))

        return None, 204


api.add_resource(
    DraftWorkflowApi,
    "/apps/<uuid:app_id>/workflows/draft",
)
api.add_resource(
    WorkflowConfigApi,
    "/apps/<uuid:app_id>/workflows/draft/config",
)
api.add_resource(
    AdvancedChatDraftWorkflowRunApi,
    "/apps/<uuid:app_id>/advanced-chat/workflows/draft/run",
)
api.add_resource(
    DraftWorkflowRunApi,
    "/apps/<uuid:app_id>/workflows/draft/run",
)
api.add_resource(
    WorkflowTaskStopApi,
    "/apps/<uuid:app_id>/workflow-runs/tasks/<string:task_id>/stop",
)
api.add_resource(
    DraftWorkflowNodeRunApi,
    "/apps/<uuid:app_id>/workflows/draft/nodes/<string:node_id>/run",
)
api.add_resource(
    AdvancedChatDraftRunIterationNodeApi,
    "/apps/<uuid:app_id>/advanced-chat/workflows/draft/iteration/nodes/<string:node_id>/run",
)
api.add_resource(
    WorkflowDraftRunIterationNodeApi,
    "/apps/<uuid:app_id>/workflows/draft/iteration/nodes/<string:node_id>/run",
)
api.add_resource(
    AdvancedChatDraftRunLoopNodeApi,
    "/apps/<uuid:app_id>/advanced-chat/workflows/draft/loop/nodes/<string:node_id>/run",
)
api.add_resource(
    WorkflowDraftRunLoopNodeApi,
    "/apps/<uuid:app_id>/workflows/draft/loop/nodes/<string:node_id>/run",
)
api.add_resource(
    PublishedWorkflowApi,
    "/apps/<uuid:app_id>/workflows/publish",
)
api.add_resource(
    PublishedAllWorkflowApi,
    "/apps/<uuid:app_id>/workflows",
)
api.add_resource(
    DefaultBlockConfigsApi,
    "/apps/<uuid:app_id>/workflows/default-workflow-block-configs",
)
api.add_resource(
    DefaultBlockConfigApi,
    "/apps/<uuid:app_id>/workflows/default-workflow-block-configs/<string:block_type>",
)
api.add_resource(
    ConvertToWorkflowApi,
    "/apps/<uuid:app_id>/convert-to-workflow",
)
api.add_resource(
    WorkflowByIdApi,
    "/apps/<uuid:app_id>/workflows/<string:workflow_id>",
)