const UserError = require('vn-loopback/util/user-error');

module.exports = Self => {
    Self.execute = async(ctx, routine, params, schema, type, options) => {
        const userId = ctx.req.accessToken.userId;
        const models = Self.app.models;
        let caller = 'CALL';

        params = params ?? [];
        schema = schema ?? 'vn';
        type = type ?? 'procedure';

        const myOptions = {userId: ctx.req.accessToken.userId};
        if (typeof options == 'object')
            Object.assign(myOptions, options);

        const chain = `${schema}.${routine}`;
        const [canExecute] = await models.ProcsPriv.rawSql(
            'SELECT account.user_hasRoutinePriv(?,?,?)',
            [type.toUpperCase(), chain, userId],
            myOptions);
        if (!Object.values(canExecute)[0]) throw new UserError(`You don't have enough privileges`, 'ACCESS_DENIED');

        const isFunction = type == 'function';
        let argString = params.map(() => '?').join(',');

        if (isFunction)
            caller = 'SELECT';
        const query = `${caller} ${chain}(${argString})`;

        const [response] = await models.ProcsPriv.rawSql(query, params, myOptions);
        return response;
    };
};