from extensions.ext_database import db
from models.api_based_extension import APIBasedExtension, APIBasedExtensionPoint
from core.helper.encrypter import encrypt_token, decrypt_token
from core.extension.api_based_extension_requestor import APIBasedExtensionRequestor


class APIBasedExtensionService:

    @staticmethod
    def get_all_by_tenant_id(tenant_id: str) -> list[APIBasedExtension]:
        extension_list = db.session.query(APIBasedExtension) \
                    .filter_by(tenant_id=tenant_id) \
                    .order_by(APIBasedExtension.created_at.desc()) \
                    .all()

        for extension in extension_list:
            extension.api_key = decrypt_token(extension.tenant_id, extension.api_key)

        return extension_list

    @classmethod
    def save(cls, extension_data: APIBasedExtension) -> APIBasedExtension:
        cls._validation(extension_data)

        extension_data.api_key = encrypt_token(extension_data.tenant_id, extension_data.api_key)

        db.session.add(extension_data)
        db.session.commit()
        return extension_data

    @staticmethod
    def delete(extension_data: APIBasedExtension) -> None:
        db.session.delete(extension_data)
        db.session.commit()

    @staticmethod
    def get_with_tenant_id(tenant_id: str, api_based_extension_id: str) -> APIBasedExtension:
        extension = db.session.query(APIBasedExtension) \
            .filter_by(tenant_id=tenant_id) \
            .filter_by(id=api_based_extension_id) \
            .first()

        if not extension:
            raise ValueError("API based extension is not found")

        extension.api_key = decrypt_token(extension.tenant_id, extension.api_key)

        return extension

    @classmethod
    def _validation(cls, extension_data: APIBasedExtension) -> None:
        # name
        if not extension_data.name:
            raise ValueError("name must not be empty")

        if not extension_data.id:
            # case one: check new data, name must be unique
            is_name_existed = db.session.query(APIBasedExtension) \
                .filter_by(tenant_id=extension_data.tenant_id) \
                .filter_by(name=extension_data.name) \
                .first()

            if is_name_existed:
                raise ValueError("name must be unique, it is already existed")
        else:
            # case two: check existing data, name must be unique
            is_name_existed = db.session.query(APIBasedExtension) \
                .filter_by(tenant_id=extension_data.tenant_id) \
                .filter_by(name=extension_data.name) \
                .filter(APIBasedExtension.id != extension_data.id) \
                .first()

            if is_name_existed:
                raise ValueError("name must be unique, it is already existed")

        # api_endpoint
        if not extension_data.api_endpoint:
            raise ValueError("api_endpoint must not be empty")

        # api_key
        if not extension_data.api_key:
            raise ValueError("api_key must not be empty")

        if len(extension_data.api_key) < 5:
            raise ValueError("api_key must be at least 5 characters")

        # check endpoint
        cls._ping_connection(extension_data)

    @staticmethod
    def _ping_connection(extension_data: APIBasedExtension) -> None:
        try:
            client = APIBasedExtensionRequestor(extension_data.api_endpoint, extension_data.api_key)
            resp = client.request(point=APIBasedExtensionPoint.PING, params={})
            if resp.get('result') != 'pong':
                raise ValueError(resp)
        except Exception as e:
            raise ValueError("connection error: {}".format(e))
