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,
    EmailPasswordResetLimitError,
    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"]

        is_forgot_password_error_rate_limit = AccountService.is_forgot_password_error_rate_limit(args["email"])
        if is_forgot_password_error_rate_limit:
            raise EmailPasswordResetLimitError()

        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"):
            AccountService.add_forgot_password_error_rate_limit(args["email"])
            raise EmailCodeError()

        AccountService.reset_forgot_password_error_rate_limit(args["email"])
        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")