import type { RxCollectionCreator, RxDatabaseCreator } from '../../types/index.d.ts';
import { newRxError, newRxTypeError } from '../../rx-error.ts';
import { rxDatabaseProperties } from './entity-properties.ts';
import { isFolderPath } from '../../plugins/utils/index.ts';

/**
 * if the name of a collection
 * clashes with a property of RxDatabase,
 * we get problems so this function prohibits this
 */
export function ensureCollectionNameValid(
    args: RxCollectionCreator & { name: string; }
) {
    if (rxDatabaseProperties().includes(args.name)) {
        throw newRxError('DB5', {
            name: args.name
        });
    }
    validateDatabaseName(args.name);
}

export function ensureDatabaseNameIsValid(args: RxDatabaseCreator<any, any>) {

    validateDatabaseName(args.name);

    if(args.name.includes('$')){
        throw newRxError('DB13', {
            name: args.name,
        });
    }

    /**
     * The server-plugin has problems when a path with and ending slash is given
     * So we do not allow this.
     * @link https://github.com/pubkey/rxdb/issues/2251
     */
    if (isFolderPath(args.name)) {
        if (args.name.endsWith('/') || args.name.endsWith('\\')) {
            throw newRxError('DB11', {
                name: args.name,
            });
        }
    }
}



const validCouchDBStringRegexStr = '^[a-z][_$a-z0-9\\-]*$';
const validCouchDBStringRegex = new RegExp(validCouchDBStringRegexStr);

/**
 * Validates that a given string is ok to be used with couchdb-collection-names.
 * We only allow these strings as database- or collection names because it ensures
 * that you later do not get in trouble when you want to use the database together witch couchdb.
 *
 * @link https://docs.couchdb.org/en/stable/api/database/common.html
 * @link https://neighbourhood.ie/blog/2020/10/13/everything-you-need-to-know-about-couchdb-database-names/
 * @throws  {RxError}
 */
export function validateDatabaseName(name: string): true {
    if (
        typeof name !== 'string' ||
        name.length === 0
    ) {
        throw newRxTypeError('UT1', {
            name
        });
    }


    // do not check, if foldername is given
    if (isFolderPath(name)) {
        return true;
    }

    if (
        !name.match(validCouchDBStringRegex) &&
        /**
         * The string ':memory:' is used in the SQLite RxStorage
         * to persist data into a memory state. Often used in tests.
         */
        name !== ':memory:'
    ) {
        throw newRxError('UT2', {
            regex: validCouchDBStringRegexStr,
            givenName: name,
        });
    }

    return true;
}