import json
from collections.abc import Mapping, Sequence
from enum import Enum
from typing import Any, Optional, Union

import contexts
from constants import HIDDEN_VALUE
from core.app.segments import (
    SecretVariable,
    Variable,
    factory,
)
from core.helper import encrypter
from extensions.ext_database import db
from libs import helper
from models import StringUUID
from models.account import Account


class CreatedByRole(Enum):
    """
    Created By Role Enum
    """
    ACCOUNT = 'account'
    END_USER = 'end_user'

    @classmethod
    def value_of(cls, value: str) -> 'CreatedByRole':
        """
        Get value of given mode.

        :param value: mode value
        :return: mode
        """
        for mode in cls:
            if mode.value == value:
                return mode
        raise ValueError(f'invalid created by role value {value}')


class WorkflowType(Enum):
    """
    Workflow Type Enum
    """
    WORKFLOW = 'workflow'
    CHAT = 'chat'

    @classmethod
    def value_of(cls, value: str) -> 'WorkflowType':
        """
        Get value of given mode.

        :param value: mode value
        :return: mode
        """
        for mode in cls:
            if mode.value == value:
                return mode
        raise ValueError(f'invalid workflow type value {value}')

    @classmethod
    def from_app_mode(cls, app_mode: Union[str, 'AppMode']) -> 'WorkflowType':
        """
        Get workflow type from app mode.

        :param app_mode: app mode
        :return: workflow type
        """
        from models.model import AppMode
        app_mode = app_mode if isinstance(app_mode, AppMode) else AppMode.value_of(app_mode)
        return cls.WORKFLOW if app_mode == AppMode.WORKFLOW else cls.CHAT


class Workflow(db.Model):
    """
    Workflow, for `Workflow App` and `Chat App workflow mode`.

    Attributes:

    - id (uuid) Workflow ID, pk
    - tenant_id (uuid) Workspace ID
    - app_id (uuid) App ID
    - type (string) Workflow type

        `workflow` for `Workflow App`

        `chat` for `Chat App workflow mode`

    - version (string) Version

        `draft` for draft version (only one for each app), other for version number (redundant)

    - graph (text) Workflow canvas configuration (JSON)

        The entire canvas configuration JSON, including Node, Edge, and other configurations

        - nodes (array[object]) Node list, see Node Schema

        - edges (array[object]) Edge list, see Edge Schema

    - created_by (uuid) Creator ID
    - created_at (timestamp) Creation time
    - updated_by (uuid) `optional` Last updater ID
    - updated_at (timestamp) `optional` Last update time
    """

    __tablename__ = 'workflows'
    __table_args__ = (
        db.PrimaryKeyConstraint('id', name='workflow_pkey'),
        db.Index('workflow_version_idx', 'tenant_id', 'app_id', 'version'),
    )

    id = db.Column(StringUUID, server_default=db.text('uuid_generate_v4()'))
    tenant_id = db.Column(StringUUID, nullable=False)
    app_id = db.Column(StringUUID, nullable=False)
    type = db.Column(db.String(255), nullable=False)
    version = db.Column(db.String(255), nullable=False)
    graph = db.Column(db.Text)
    features = db.Column(db.Text)
    created_by = db.Column(StringUUID, nullable=False)
    created_at = db.Column(db.DateTime, nullable=False, server_default=db.text('CURRENT_TIMESTAMP(0)'))
    updated_by = db.Column(StringUUID)
    updated_at = db.Column(db.DateTime)
    _environment_variables = db.Column('environment_variables', db.Text, nullable=False, server_default='{}')

    @property
    def created_by_account(self):
        return db.session.get(Account, self.created_by)

    @property
    def updated_by_account(self):
        return db.session.get(Account, self.updated_by) if self.updated_by else None

    @property
    def graph_dict(self) -> Mapping[str, Any]:
        return json.loads(self.graph) if self.graph else {}

    @property
    def features_dict(self) -> Mapping[str, Any]:
        return json.loads(self.features) if self.features else {}

    def user_input_form(self, to_old_structure: bool = False) -> list:
        # get start node from graph
        if not self.graph:
            return []

        graph_dict = self.graph_dict
        if 'nodes' not in graph_dict:
            return []

        start_node = next((node for node in graph_dict['nodes'] if node['data']['type'] == 'start'), None)
        if not start_node:
            return []

        # get user_input_form from start node
        variables = start_node.get('data', {}).get('variables', [])

        if to_old_structure:
            old_structure_variables = []
            for variable in variables:
                old_structure_variables.append({
                    variable['type']: variable
                })

            return old_structure_variables

        return variables

    @property
    def unique_hash(self) -> str:
        """
        Get hash of workflow.

        :return: hash
        """
        entity = {
            'graph': self.graph_dict,
            'features': self.features_dict
        }

        return helper.generate_text_hash(json.dumps(entity, sort_keys=True))

    @property
    def tool_published(self) -> bool:
        from models.tools import WorkflowToolProvider
        return db.session.query(WorkflowToolProvider).filter(
            WorkflowToolProvider.app_id == self.app_id
        ).first() is not None

    @property
    def environment_variables(self) -> Sequence[Variable]:
        # TODO: find some way to init `self._environment_variables` when instance created.
        if self._environment_variables is None:
            self._environment_variables = '{}'

        tenant_id = contexts.tenant_id.get()

        environment_variables_dict: dict[str, Any] = json.loads(self._environment_variables)
        results = [factory.build_variable_from_mapping(v) for v in environment_variables_dict.values()]

        # decrypt secret variables value
        decrypt_func = (
            lambda var: var.model_copy(
                update={'value': encrypter.decrypt_token(tenant_id=tenant_id, token=var.value)}
            )
            if isinstance(var, SecretVariable)
            else var
        )
        results = list(map(decrypt_func, results))
        return results

    @environment_variables.setter
    def environment_variables(self, value: Sequence[Variable]):
        tenant_id = contexts.tenant_id.get()

        value = list(value)
        if any(var for var in value if not var.id):
            raise ValueError('environment variable require a unique id')

        # Compare inputs and origin variables, if the value is HIDDEN_VALUE, use the origin variable value (only update `name`).
        origin_variables_dictionary = {var.id: var for var in self.environment_variables}
        for i, variable in enumerate(value):
            if variable.id in origin_variables_dictionary and variable.value == HIDDEN_VALUE:
                value[i] = origin_variables_dictionary[variable.id].model_copy(update={'name': variable.name})

        # encrypt secret variables value
        encrypt_func = (
            lambda var: var.model_copy(
                update={'value': encrypter.encrypt_token(tenant_id=tenant_id, token=var.value)}
            )
            if isinstance(var, SecretVariable)
            else var
        )
        encrypted_vars = list(map(encrypt_func, value))
        environment_variables_json = json.dumps(
            {var.name: var.model_dump() for var in encrypted_vars},
            ensure_ascii=False,
        )
        self._environment_variables = environment_variables_json

    def to_dict(self, *, include_secret: bool = False) -> Mapping[str, Any]:
        environment_variables = list(self.environment_variables)
        environment_variables = [
            v if not isinstance(v, SecretVariable) or include_secret else v.model_copy(update={'value': ''})
            for v in environment_variables
        ]

        result = {
            'graph': self.graph_dict,
            'features': self.features_dict,
            'environment_variables': [var.model_dump(mode='json') for var in environment_variables],
        }
        return result


class WorkflowRunTriggeredFrom(Enum):
    """
    Workflow Run Triggered From Enum
    """
    DEBUGGING = 'debugging'
    APP_RUN = 'app-run'

    @classmethod
    def value_of(cls, value: str) -> 'WorkflowRunTriggeredFrom':
        """
        Get value of given mode.

        :param value: mode value
        :return: mode
        """
        for mode in cls:
            if mode.value == value:
                return mode
        raise ValueError(f'invalid workflow run triggered from value {value}')


class WorkflowRunStatus(Enum):
    """
    Workflow Run Status Enum
    """
    RUNNING = 'running'
    SUCCEEDED = 'succeeded'
    FAILED = 'failed'
    STOPPED = 'stopped'

    @classmethod
    def value_of(cls, value: str) -> 'WorkflowRunStatus':
        """
        Get value of given mode.

        :param value: mode value
        :return: mode
        """
        for mode in cls:
            if mode.value == value:
                return mode
        raise ValueError(f'invalid workflow run status value {value}')


class WorkflowRun(db.Model):
    """
    Workflow Run

    Attributes:

    - id (uuid) Run ID
    - tenant_id (uuid) Workspace ID
    - app_id (uuid) App ID
    - sequence_number (int) Auto-increment sequence number, incremented within the App, starting from 1
    - workflow_id (uuid) Workflow ID
    - type (string) Workflow type
    - triggered_from (string) Trigger source

        `debugging` for canvas debugging

        `app-run` for (published) app execution

    - version (string) Version
    - graph (text) Workflow canvas configuration (JSON)
    - inputs (text) Input parameters
    - status (string) Execution status, `running` / `succeeded` / `failed` / `stopped`
    - outputs (text) `optional` Output content
    - error (string) `optional` Error reason
    - elapsed_time (float) `optional` Time consumption (s)
    - total_tokens (int) `optional` Total tokens used
    - total_steps (int) Total steps (redundant), default 0
    - created_by_role (string) Creator role

        - `account` Console account

        - `end_user` End user

    - created_by (uuid) Runner ID
    - created_at (timestamp) Run time
    - finished_at (timestamp) End time
    """

    __tablename__ = 'workflow_runs'
    __table_args__ = (
        db.PrimaryKeyConstraint('id', name='workflow_run_pkey'),
        db.Index('workflow_run_triggerd_from_idx', 'tenant_id', 'app_id', 'triggered_from'),
        db.Index('workflow_run_tenant_app_sequence_idx', 'tenant_id', 'app_id', 'sequence_number'),
    )

    id = db.Column(StringUUID, server_default=db.text('uuid_generate_v4()'))
    tenant_id = db.Column(StringUUID, nullable=False)
    app_id = db.Column(StringUUID, nullable=False)
    sequence_number = db.Column(db.Integer, nullable=False)
    workflow_id = db.Column(StringUUID, nullable=False)
    type = db.Column(db.String(255), nullable=False)
    triggered_from = db.Column(db.String(255), nullable=False)
    version = db.Column(db.String(255), nullable=False)
    graph = db.Column(db.Text)
    inputs = db.Column(db.Text)
    status = db.Column(db.String(255), nullable=False)
    outputs = db.Column(db.Text)
    error = db.Column(db.Text)
    elapsed_time = db.Column(db.Float, nullable=False, server_default=db.text('0'))
    total_tokens = db.Column(db.Integer, nullable=False, server_default=db.text('0'))
    total_steps = db.Column(db.Integer, server_default=db.text('0'))
    created_by_role = db.Column(db.String(255), nullable=False)
    created_by = db.Column(StringUUID, nullable=False)
    created_at = db.Column(db.DateTime, nullable=False, server_default=db.text('CURRENT_TIMESTAMP(0)'))
    finished_at = db.Column(db.DateTime)

    @property
    def created_by_account(self):
        created_by_role = CreatedByRole.value_of(self.created_by_role)
        return db.session.get(Account, self.created_by) \
            if created_by_role == CreatedByRole.ACCOUNT else None

    @property
    def created_by_end_user(self):
        from models.model import EndUser
        created_by_role = CreatedByRole.value_of(self.created_by_role)
        return db.session.get(EndUser, self.created_by) \
            if created_by_role == CreatedByRole.END_USER else None

    @property
    def graph_dict(self):
        return json.loads(self.graph) if self.graph else None

    @property
    def inputs_dict(self):
        return json.loads(self.inputs) if self.inputs else None

    @property
    def outputs_dict(self):
        return json.loads(self.outputs) if self.outputs else None

    @property
    def message(self) -> Optional['Message']:
        from models.model import Message
        return db.session.query(Message).filter(
            Message.app_id == self.app_id,
            Message.workflow_run_id == self.id
        ).first()

    @property
    def workflow(self):
        return db.session.query(Workflow).filter(Workflow.id == self.workflow_id).first()

    def to_dict(self):
        return {
            'id': self.id,
            'tenant_id': self.tenant_id,
            'app_id': self.app_id,
            'sequence_number': self.sequence_number,
            'workflow_id': self.workflow_id,
            'type': self.type,
            'triggered_from': self.triggered_from,
            'version': self.version,
            'graph': self.graph_dict,
            'inputs': self.inputs_dict,
            'status': self.status,
            'outputs': self.outputs_dict,
            'error': self.error,
            'elapsed_time': self.elapsed_time,
            'total_tokens': self.total_tokens,
            'total_steps': self.total_steps,
            'created_by_role': self.created_by_role,
            'created_by': self.created_by,
            'created_at': self.created_at,
            'finished_at': self.finished_at,
        }

    @classmethod
    def from_dict(cls, data: dict) -> 'WorkflowRun':
        return cls(
            id=data.get('id'),
            tenant_id=data.get('tenant_id'),
            app_id=data.get('app_id'),
            sequence_number=data.get('sequence_number'),
            workflow_id=data.get('workflow_id'),
            type=data.get('type'),
            triggered_from=data.get('triggered_from'),
            version=data.get('version'),
            graph=json.dumps(data.get('graph')),
            inputs=json.dumps(data.get('inputs')),
            status=data.get('status'),
            outputs=json.dumps(data.get('outputs')),
            error=data.get('error'),
            elapsed_time=data.get('elapsed_time'),
            total_tokens=data.get('total_tokens'),
            total_steps=data.get('total_steps'),
            created_by_role=data.get('created_by_role'),
            created_by=data.get('created_by'),
            created_at=data.get('created_at'),
            finished_at=data.get('finished_at'),
        )


class WorkflowNodeExecutionTriggeredFrom(Enum):
    """
    Workflow Node Execution Triggered From Enum
    """
    SINGLE_STEP = 'single-step'
    WORKFLOW_RUN = 'workflow-run'

    @classmethod
    def value_of(cls, value: str) -> 'WorkflowNodeExecutionTriggeredFrom':
        """
        Get value of given mode.

        :param value: mode value
        :return: mode
        """
        for mode in cls:
            if mode.value == value:
                return mode
        raise ValueError(f'invalid workflow node execution triggered from value {value}')


class WorkflowNodeExecutionStatus(Enum):
    """
    Workflow Node Execution Status Enum
    """
    RUNNING = 'running'
    SUCCEEDED = 'succeeded'
    FAILED = 'failed'

    @classmethod
    def value_of(cls, value: str) -> 'WorkflowNodeExecutionStatus':
        """
        Get value of given mode.

        :param value: mode value
        :return: mode
        """
        for mode in cls:
            if mode.value == value:
                return mode
        raise ValueError(f'invalid workflow node execution status value {value}')


class WorkflowNodeExecution(db.Model):
    """
    Workflow Node Execution

    - id (uuid) Execution ID
    - tenant_id (uuid) Workspace ID
    - app_id (uuid) App ID
    - workflow_id (uuid) Workflow ID
    - triggered_from (string) Trigger source

        `single-step` for single-step debugging

        `workflow-run` for workflow execution (debugging / user execution)

    - workflow_run_id (uuid) `optional` Workflow run ID

        Null for single-step debugging.

    - index (int) Execution sequence number, used for displaying Tracing Node order
    - predecessor_node_id (string) `optional` Predecessor node ID, used for displaying execution path
    - node_id (string) Node ID
    - node_type (string) Node type, such as `start`
    - title (string) Node title
    - inputs (json) All predecessor node variable content used in the node
    - process_data (json) Node process data
    - outputs (json) `optional` Node output variables
    - status (string) Execution status, `running` / `succeeded` / `failed`
    - error (string) `optional` Error reason
    - elapsed_time (float) `optional` Time consumption (s)
    - execution_metadata (text) Metadata

        - total_tokens (int) `optional` Total tokens used

        - total_price (decimal) `optional` Total cost

        - currency (string) `optional` Currency, such as USD / RMB

    - created_at (timestamp) Run time
    - created_by_role (string) Creator role

        - `account` Console account

        - `end_user` End user

    - created_by (uuid) Runner ID
    - finished_at (timestamp) End time
    """

    __tablename__ = 'workflow_node_executions'
    __table_args__ = (
        db.PrimaryKeyConstraint('id', name='workflow_node_execution_pkey'),
        db.Index('workflow_node_execution_workflow_run_idx', 'tenant_id', 'app_id', 'workflow_id',
                 'triggered_from', 'workflow_run_id'),
        db.Index('workflow_node_execution_node_run_idx', 'tenant_id', 'app_id', 'workflow_id',
                 'triggered_from', 'node_id'),
    )

    id = db.Column(StringUUID, server_default=db.text('uuid_generate_v4()'))
    tenant_id = db.Column(StringUUID, nullable=False)
    app_id = db.Column(StringUUID, nullable=False)
    workflow_id = db.Column(StringUUID, nullable=False)
    triggered_from = db.Column(db.String(255), nullable=False)
    workflow_run_id = db.Column(StringUUID)
    index = db.Column(db.Integer, nullable=False)
    predecessor_node_id = db.Column(db.String(255))
    node_id = db.Column(db.String(255), nullable=False)
    node_type = db.Column(db.String(255), nullable=False)
    title = db.Column(db.String(255), nullable=False)
    inputs = db.Column(db.Text)
    process_data = db.Column(db.Text)
    outputs = db.Column(db.Text)
    status = db.Column(db.String(255), nullable=False)
    error = db.Column(db.Text)
    elapsed_time = db.Column(db.Float, nullable=False, server_default=db.text('0'))
    execution_metadata = db.Column(db.Text)
    created_at = db.Column(db.DateTime, nullable=False, server_default=db.text('CURRENT_TIMESTAMP(0)'))
    created_by_role = db.Column(db.String(255), nullable=False)
    created_by = db.Column(StringUUID, nullable=False)
    finished_at = db.Column(db.DateTime)

    @property
    def created_by_account(self):
        created_by_role = CreatedByRole.value_of(self.created_by_role)
        return db.session.get(Account, self.created_by) \
            if created_by_role == CreatedByRole.ACCOUNT else None

    @property
    def created_by_end_user(self):
        from models.model import EndUser
        created_by_role = CreatedByRole.value_of(self.created_by_role)
        return db.session.get(EndUser, self.created_by) \
            if created_by_role == CreatedByRole.END_USER else None

    @property
    def inputs_dict(self):
        return json.loads(self.inputs) if self.inputs else None

    @property
    def outputs_dict(self):
        return json.loads(self.outputs) if self.outputs else None

    @property
    def process_data_dict(self):
        return json.loads(self.process_data) if self.process_data else None

    @property
    def execution_metadata_dict(self):
        return json.loads(self.execution_metadata) if self.execution_metadata else None

    @property
    def extras(self):
        from core.tools.tool_manager import ToolManager
        extras = {}
        if self.execution_metadata_dict:
            from core.workflow.entities.node_entities import NodeType
            if self.node_type == NodeType.TOOL.value and 'tool_info' in self.execution_metadata_dict:
                tool_info = self.execution_metadata_dict['tool_info']
                extras['icon'] = ToolManager.get_tool_icon(
                    tenant_id=self.tenant_id,
                    provider_type=tool_info['provider_type'],
                    provider_id=tool_info['provider_id']
                )

        return extras


class WorkflowAppLogCreatedFrom(Enum):
    """
    Workflow App Log Created From Enum
    """
    SERVICE_API = 'service-api'
    WEB_APP = 'web-app'
    INSTALLED_APP = 'installed-app'

    @classmethod
    def value_of(cls, value: str) -> 'WorkflowAppLogCreatedFrom':
        """
        Get value of given mode.

        :param value: mode value
        :return: mode
        """
        for mode in cls:
            if mode.value == value:
                return mode
        raise ValueError(f'invalid workflow app log created from value {value}')


class WorkflowAppLog(db.Model):
    """
    Workflow App execution log, excluding workflow debugging records.

    Attributes:

    - id (uuid) run ID
    - tenant_id (uuid) Workspace ID
    - app_id (uuid) App ID
    - workflow_id (uuid) Associated Workflow ID
    - workflow_run_id (uuid) Associated Workflow Run ID
    - created_from (string) Creation source

        `service-api` App Execution OpenAPI

        `web-app` WebApp

        `installed-app` Installed App

    - created_by_role (string) Creator role

        - `account` Console account

        - `end_user` End user

    - created_by (uuid) Creator ID, depends on the user table according to created_by_role
    - created_at (timestamp) Creation time
    """

    __tablename__ = 'workflow_app_logs'
    __table_args__ = (
        db.PrimaryKeyConstraint('id', name='workflow_app_log_pkey'),
        db.Index('workflow_app_log_app_idx', 'tenant_id', 'app_id'),
    )

    id = db.Column(StringUUID, server_default=db.text('uuid_generate_v4()'))
    tenant_id = db.Column(StringUUID, nullable=False)
    app_id = db.Column(StringUUID, nullable=False)
    workflow_id = db.Column(StringUUID, nullable=False)
    workflow_run_id = db.Column(StringUUID, nullable=False)
    created_from = db.Column(db.String(255), nullable=False)
    created_by_role = db.Column(db.String(255), nullable=False)
    created_by = db.Column(StringUUID, nullable=False)
    created_at = db.Column(db.DateTime, nullable=False, server_default=db.text('CURRENT_TIMESTAMP(0)'))

    @property
    def workflow_run(self):
        return db.session.get(WorkflowRun, self.workflow_run_id)

    @property
    def created_by_account(self):
        created_by_role = CreatedByRole.value_of(self.created_by_role)
        return db.session.get(Account, self.created_by) \
            if created_by_role == CreatedByRole.ACCOUNT else None

    @property
    def created_by_end_user(self):
        from models.model import EndUser
        created_by_role = CreatedByRole.value_of(self.created_by_role)
        return db.session.get(EndUser, self.created_by) \
            if created_by_role == CreatedByRole.END_USER else None