from flask_restful import Resource, marshal_with, reqparse
from flask_restful.inputs import int_range
from werkzeug.exceptions import NotFound

import services
from controllers.service_api import api
from controllers.service_api.app.error import NotChatAppError
from controllers.service_api.wraps import FetchUserArg, WhereisUserArg, validate_app_token
from fields.conversation_fields import conversation_infinite_scroll_pagination_fields, simple_conversation_fields
from libs.helper import uuid_value
from models.model import App, AppMode, EndUser
from services.conversation_service import ConversationService


class ConversationApi(Resource):

    @validate_app_token(fetch_user_arg=FetchUserArg(fetch_from=WhereisUserArg.QUERY))
    @marshal_with(conversation_infinite_scroll_pagination_fields)
    def get(self, app_model: App, end_user: EndUser):
        app_mode = AppMode.value_of(app_model.mode)
        if app_mode not in [AppMode.CHAT, AppMode.AGENT_CHAT, AppMode.ADVANCED_CHAT]:
            raise NotChatAppError()

        parser = reqparse.RequestParser()
        parser.add_argument('last_id', type=uuid_value, location='args')
        parser.add_argument('limit', type=int_range(1, 100), required=False, default=20, location='args')
        args = parser.parse_args()

        try:
            return ConversationService.pagination_by_last_id(app_model, end_user, args['last_id'], args['limit'])
        except services.errors.conversation.LastConversationNotExistsError:
            raise NotFound("Last Conversation Not Exists.")


class ConversationDetailApi(Resource):
    @validate_app_token(fetch_user_arg=FetchUserArg(fetch_from=WhereisUserArg.JSON))
    @marshal_with(simple_conversation_fields)
    def delete(self, app_model: App, end_user: EndUser, c_id):
        app_mode = AppMode.value_of(app_model.mode)
        if app_mode not in [AppMode.CHAT, AppMode.AGENT_CHAT, AppMode.ADVANCED_CHAT]:
            raise NotChatAppError()

        conversation_id = str(c_id)

        try:
            ConversationService.delete(app_model, conversation_id, end_user)
        except services.errors.conversation.ConversationNotExistsError:
            raise NotFound("Conversation Not Exists.")
        return {"result": "success"}, 204


class ConversationRenameApi(Resource):

    @validate_app_token(fetch_user_arg=FetchUserArg(fetch_from=WhereisUserArg.JSON))
    @marshal_with(simple_conversation_fields)
    def post(self, app_model: App, end_user: EndUser, c_id):
        app_mode = AppMode.value_of(app_model.mode)
        if app_mode not in [AppMode.CHAT, AppMode.AGENT_CHAT, AppMode.ADVANCED_CHAT]:
            raise NotChatAppError()

        conversation_id = str(c_id)

        parser = reqparse.RequestParser()
        parser.add_argument('name', type=str, required=False, location='json')
        parser.add_argument('auto_generate', type=bool, required=False, default=False, location='json')
        args = parser.parse_args()

        try:
            return ConversationService.rename(
                app_model,
                conversation_id,
                end_user,
                args['name'],
                args['auto_generate']
            )
        except services.errors.conversation.ConversationNotExistsError:
            raise NotFound("Conversation Not Exists.")


api.add_resource(ConversationRenameApi, '/conversations/<uuid:c_id>/name', endpoint='conversation_name')
api.add_resource(ConversationApi, '/conversations')
api.add_resource(ConversationDetailApi, '/conversations/<uuid:c_id>', endpoint='conversation_detail')