import CryptoJS from 'crypto-js';

/**
 * 生成 KSort 签名
 * @param appId APP_ID
 * @param appKey APP_KEY
 * @param command 命令
 * @param data 数据
 * @param timestamp 时间戳（可选）
 * @returns
 */
export function signatureByKSort(appId: string, appKey: string, command: string, data: any, timestamp: number | null = null) {
	// 序列化数据
	const input = typeof data === 'string' ? (data as string) : JSON.stringify(data);

	// 生成时间戳
	if (!timestamp) {
		timestamp = new Date().getTime() - new Date('1970-01-01T00:00:00Z').getTime();
	}

	const sData: any = {
		app_id: appId,
		app_key: appKey,
		command,
		data: input,
		timestamp,
	};

	// 获取对象的所有键并对键进行排序
	const keys = Object.keys(sData);
	keys.sort();

	// 生成签名
	let result = '';
	for (let i = 0; i < keys.length; i++) {
		const key = keys[i];
		const value = sData[key];
		result += key + '=' + value;

		if (i < keys.length - 1) {
			result += ',';
		}
	}

	// MD5 小写加密
	const hash = CryptoJS.MD5(result);
	const hexString = hash.toString(CryptoJS.enc.Hex);
	var signature = hexString.toLowerCase();

	return {
		app_id: appId,
		app_key: appKey,
		command,
		data: input,
		timestamp,
		signature,
	};
}