'use strict';

const { ReplacementMachine } = require('./ReplacementMachine.js');

class ZhReplacementMachine extends ReplacementMachine {
	constructor() {
		super(
			'zh',
			'zh-hans',
			'zh-hant',
			'zh-cn',
			'zh-hk',
			'zh-mo',
			'zh-my',
			'zh-sg',
			'zh-tw'
		);
	}
	validCodePair(destCode, invertCode) {
		if (destCode === invertCode) { return true; }
		switch (destCode) {
			case 'zh-cn':
				if (invertCode === 'zh-tw') { return true; }
				// fall through
			case 'zh-sg':
			case 'zh-my':
			case 'zh-hans':
				return invertCode === 'zh-hant';
			case 'zh-tw':
				if (invertCode === 'zh-cn') { return true; }
				// fall through
			case 'zh-hk':
			case 'zh-mo':
			case 'zh-hant':
				return invertCode === 'zh-hans';
			default:
				return false;
		}
	}
}

module.exports.ZhReplacementMachine = ZhReplacementMachine;