import base64
import secrets

from flask import request
from flask_restful import Resource, reqparse  # type: ignore
from sqlalchemy import select
from sqlalchemy.orm import Session

from constants.languages import languages
from controllers.console import api
from controllers.console.auth.error import EmailCodeError, InvalidEmailError, InvalidTokenError, PasswordMismatchError
from controllers.console.error import AccountInFreezeError, AccountNotFound, EmailSendIpLimitError
from controllers.console.wraps import setup_required
from events.tenant_event import tenant_was_created
from extensions.ext_database import db
from libs.helper import email, extract_remote_ip
from libs.password import hash_password, valid_password
from models.account import Account
from services.account_service import AccountService, TenantService
from services.errors.account import AccountRegisterError
from services.errors.workspace import WorkSpaceNotAllowedCreateError
from services.feature_service import FeatureService


class ForgotPasswordSendEmailApi(Resource):
    @setup_required
    def post(self):
        parser = reqparse.RequestParser()
        parser.add_argument("email", type=email, required=True, location="json")
        parser.add_argument("language", type=str, required=False, location="json")
        args = parser.parse_args()

        ip_address = extract_remote_ip(request)
        if AccountService.is_email_send_ip_limit(ip_address):
            raise EmailSendIpLimitError()

        if args["language"] is not None and args["language"] == "zh-Hans":
            language = "zh-Hans"
        else:
            language = "en-US"

        with Session(db.engine) as session:
            account = session.execute(select(Account).filter_by(email=args["email"])).scalar_one_or_none()
        token = None
        if account is None:
            if FeatureService.get_system_features().is_allow_register:
                token = AccountService.send_reset_password_email(email=args["email"], language=language)
                return {"result": "fail", "data": token, "code": "account_not_found"}
            else:
                raise AccountNotFound()
        else:
            token = AccountService.send_reset_password_email(account=account, email=args["email"], language=language)

        return {"result": "success", "data": token}


class ForgotPasswordCheckApi(Resource):
    @setup_required
    def post(self):
        parser = reqparse.RequestParser()
        parser.add_argument("email", type=str, required=True, location="json")
        parser.add_argument("code", type=str, required=True, location="json")
        parser.add_argument("token", type=str, required=True, nullable=False, location="json")
        args = parser.parse_args()

        user_email = args["email"]

        token_data = AccountService.get_reset_password_data(args["token"])
        if token_data is None:
            raise InvalidTokenError()

        if user_email != token_data.get("email"):
            raise InvalidEmailError()

        if args["code"] != token_data.get("code"):
            raise EmailCodeError()

        return {"is_valid": True, "email": token_data.get("email")}


class ForgotPasswordResetApi(Resource):
    @setup_required
    def post(self):
        parser = reqparse.RequestParser()
        parser.add_argument("token", type=str, required=True, nullable=False, location="json")
        parser.add_argument("new_password", type=valid_password, required=True, nullable=False, location="json")
        parser.add_argument("password_confirm", type=valid_password, required=True, nullable=False, location="json")
        args = parser.parse_args()

        new_password = args["new_password"]
        password_confirm = args["password_confirm"]

        if str(new_password).strip() != str(password_confirm).strip():
            raise PasswordMismatchError()

        token = args["token"]
        reset_data = AccountService.get_reset_password_data(token)

        if reset_data is None:
            raise InvalidTokenError()

        AccountService.revoke_reset_password_token(token)

        salt = secrets.token_bytes(16)
        base64_salt = base64.b64encode(salt).decode()

        password_hashed = hash_password(new_password, salt)
        base64_password_hashed = base64.b64encode(password_hashed).decode()

        with Session(db.engine) as session:
            account = session.execute(select(Account).filter_by(email=reset_data.get("email"))).scalar_one_or_none()
        if account:
            account.password = base64_password_hashed
            account.password_salt = base64_salt
            db.session.commit()
            tenant = TenantService.get_join_tenants(account)
            if not tenant and not FeatureService.get_system_features().is_allow_create_workspace:
                tenant = TenantService.create_tenant(f"{account.name}'s Workspace")
                TenantService.create_tenant_member(tenant, account, role="owner")
                account.current_tenant = tenant
                tenant_was_created.send(tenant)
        else:
            try:
                account = AccountService.create_account_and_tenant(
                    email=reset_data.get("email", ""),
                    name=reset_data.get("email", ""),
                    password=password_confirm,
                    interface_language=languages[0],
                )
            except WorkSpaceNotAllowedCreateError:
                pass
            except AccountRegisterError:
                raise AccountInFreezeError()

        return {"result": "success"}


api.add_resource(ForgotPasswordSendEmailApi, "/forgot-password")
api.add_resource(ForgotPasswordCheckApi, "/forgot-password/validity")
api.add_resource(ForgotPasswordResetApi, "/forgot-password/resets")