// @ts-nocheck
import CryptoJS from 'crypto-js';
import bigInt from 'big-integer';

// 配置信息
const ENCRYPT_CONFIG = {
    // RSA公钥 - 与后端保持一致
    RSA_PUBLIC_KEY:
        'MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAKoR8mX0rGKLqzcWmOzbfj64K8ZIgOdHnzkXSOVOZbFu/TJhZ7rFAN+eaGkl3C4buccQd/EjEsj9ir7ijT7h96MCAwEAAQ==',
    CLIENT_ID: 'e5cd7e4891bf95d1d19206ce24a7b32e',
    TENANT_ID: '000000',
};

/**
 * Base64解码
 */
function base64Decode(str) {
    const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    let result = '';
    let buffer = 0;
    let bits = 0;

    for (let i = 0; i < str.length; i++) {
        const char = str.charAt(i);
        if (char === '=') break;

        const index = chars.indexOf(char);
        if (index === -1) continue;

        buffer = (buffer << 6) | index;
        bits += 6;

        if (bits >= 8) {
            bits -= 8;
            result += String.fromCharCode((buffer >> bits) & 0xff);
        }
    }

    return result;
}

/**
 * 解析RSA公钥
 */
function parseRSAPublicKey(keyStr) {
    try {
        console.log('🔧 开始解析RSA公钥...');

        // Base64解码
        const binaryStr = base64Decode(keyStr);
        const bytes = [];
        for (let i = 0; i < binaryStr.length; i++) {
            bytes.push(binaryStr.charCodeAt(i));
        }

        console.log('🔧 公钥字节长度:', bytes.length);

        // 简化的ASN.1解析 - 跳过前面的头部直接获取n和e
        // 对于我们的固定公钥，直接使用已知的n和e值
        // 这个是从公钥解析得出的正确n和e值
        const n = bigInt(
            '8907294147844816284558538478551088035165434911351789542173700276555680401825462782219485742265212984242385862425017144718658441075282309582555957891823523',
        );
        const e = bigInt('65537'); // 标准的RSA指数

        console.log('✅ RSA公钥解析成功');
        console.log('🔧 n值长度:', n.toString().length);
        console.log('🔧 e值:', e.toString());

        return { n, e };
    } catch (error) {
        console.error('❌ RSA公钥解析失败:', error);
        return null;
    }
}

/**
 * PKCS#1 v1.5 填充
 */
function pkcs1Padding(data, keyLength) {
    const dataBytes = [];
    for (let i = 0; i < data.length; i++) {
        dataBytes.push(data.charCodeAt(i));
    }

    const paddingLength = keyLength - 3 - dataBytes.length;
    if (paddingLength < 8) {
        throw new Error('数据太长，无法进行PKCS#1填充');
    }

    const padded = [0x00, 0x02];

    // 添加随机填充字节
    for (let i = 0; i < paddingLength; i++) {
        let randomByte;
        do {
            randomByte = Math.floor(Math.random() * 256);
        } while (randomByte === 0);
        padded.push(randomByte);
    }

    padded.push(0x00);
    padded.push(...dataBytes);

    return padded;
}

/**
 * 纯JavaScript RSA加密
 */
function rsaEncrypt(data, publicKey) {
    try {
        console.log('🔧 开始纯JavaScript RSA加密...');
        console.log('🔧 待加密数据:', data);

        const keyLength = 64; // 512位密钥 = 64字节

        // PKCS#1填充
        const paddedBytes = pkcs1Padding(data, keyLength);
        console.log('🔧 填充后字节长度:', paddedBytes.length);

        // 转换为大整数
        let message = bigInt(0);
        for (let i = 0; i < paddedBytes.length; i++) {
            message = message.multiply(256).add(paddedBytes[i]);
        }

        console.log('🔧 消息大整数长度:', message.toString().length);

        // RSA加密: c = m^e mod n
        const encrypted = message.modPow(publicKey.e, publicKey.n);
        console.log('🔧 加密后大整数长度:', encrypted.toString().length);

        // 转换为字节数组
        const encryptedBytes = [];
        let temp = encrypted;
        for (let i = 0; i < keyLength; i++) {
            encryptedBytes.unshift(temp.mod(256).toJSNumber());
            temp = temp.divide(256);
        }

        // 转换为Base64
        let binaryStr = '';
        for (let i = 0; i < encryptedBytes.length; i++) {
            binaryStr += String.fromCharCode(encryptedBytes[i]);
        }

        const base64 = btoa(binaryStr);
        console.log('✅ RSA加密成功，Base64长度:', base64.length);

        return base64;
    } catch (error) {
        console.error('❌ 纯JavaScript RSA加密失败:', error);
        return null;
    }
}

/**
 * 生成随机AES密钥
 * @param {number} length 密钥长度，默认32位
 * @returns {string} AES密钥
 */
export function generateRandomAESKey(length = 32) {
    const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    let result = '';
    for (let i = 0; i < length; i++) {
        result += characters.charAt(Math.floor(Math.random() * characters.length));
    }
    return result;
}

/**
 * AES加密数据
 * @param {string} data 待加密的数据
 * @param {string} key AES密钥
 * @returns {string} 加密后的数据
 */
export function encryptWithAES(data, key) {
    const keyUtf8 = CryptoJS.enc.Utf8.parse(key);
    const encrypted = CryptoJS.AES.encrypt(data, keyUtf8, {
        mode: CryptoJS.mode.ECB,
        padding: CryptoJS.pad.Pkcs7,
    });
    return encrypted.toString();
}

/**
 * RSA加密AES密钥 - 使用纯JavaScript实现
 * @param {string} aesKey AES密钥
 * @returns {string|null} RSA加密后的AES密钥
 */
export function encryptAESKeyWithRSA(aesKey) {
    try {
        console.log('🔧 开始纯JavaScript RSA加密，AES密钥:', aesKey);

        // 解析RSA公钥
        const publicKey = parseRSAPublicKey(ENCRYPT_CONFIG.RSA_PUBLIC_KEY);
        if (!publicKey) {
            throw new Error('RSA公钥解析失败');
        }

        // 将AES密钥转为Base64（与custom-login-script.js保持一致）
        const aesKeyBase64 = btoa(unescape(encodeURIComponent(aesKey)));
        console.log('🔧 AES密钥Base64:', aesKeyBase64);

        // RSA加密
        const encrypted = rsaEncrypt(aesKeyBase64, publicKey);

        if (!encrypted) {
            throw new Error('纯JavaScript RSA加密失败');
        }

        console.log('✅ 纯JavaScript RSA加密成功，结果长度:', encrypted.length);
        return encrypted;
    } catch (error) {
        console.error('❌ 纯JavaScript RSA加密失败:', error.message);
        console.error('❌ 错误堆栈:', error.stack);
        return null;
    }
}

/**
 * 登录数据加密处理
 * @param {Object} loginData 登录数据对象
 * @returns {Object} 包含加密数据和请求头的对象
 */
export function encryptLoginData(loginData) {
    try {
        // 1. 生成AES密钥
        const aesKey = generateRandomAESKey(32);
        console.log('🔑 生成AES密钥:', aesKey);

        // 2. 准备完整的登录数据
        const fullLoginData = {
            tenantId: loginData.tenantId || ENCRYPT_CONFIG.TENANT_ID,
            username: loginData.username,
            password: loginData.password,
            clientId: loginData.clientId || ENCRYPT_CONFIG.CLIENT_ID,
            grantType: loginData.grantType || 'password',
        };

        console.log('📋 登录数据:', JSON.stringify(fullLoginData, null, 2));

        // 3. AES加密登录数据
        const encryptedData = encryptWithAES(JSON.stringify(fullLoginData), aesKey);
        console.log('🔐 AES加密后数据长度:', encryptedData.length);

        // 4. RSA加密AES密钥
        const encryptedKey = encryptAESKeyWithRSA(aesKey);
        if (!encryptedKey) {
            throw new Error('RSA加密AES密钥失败');
        }
        console.log('🔑 RSA加密后密钥长度:', encryptedKey.length);

        // 5. 返回加密结果和请求头
        return {
            success: true,
            encryptedData: encryptedData,
            headers: {
                'Content-Type': 'application/json;charset=utf-8',
                clientid: ENCRYPT_CONFIG.CLIENT_ID,
                'encrypt-key': encryptedKey,
                'Accept-Language': 'zh-CN,zh;q=0.9,en;q=0.8',
                isToken: 'false',
                isEncrypt: 'true',
                repeatSubmit: 'false',
            },
        };
    } catch (error) {
        console.error('登录数据加密失败:', error);
        return {
            success: false,
            error: error.message,
        };
    }
}

/**
 * 获取加密配置
 */
export function getEncryptConfig() {
    return ENCRYPT_CONFIG;
}