const axios = require('axios');

/**
 * Cookie handling utilities
 */
class CookieUtils {
    static parse(cookieStr) {
        if (!cookieStr) return {};
        return cookieStr.split(';').reduce((acc, curr) => {
            const [key, value] = curr.split('=');
            if (key) acc[key.trim()] = value ? value.trim() : '';
            return acc;
        }, {});
    }

    static getValue(cookies, key) {
        if (!cookies) return null;
        if (Array.isArray(cookies)) cookies = cookies.join('; ');
        const match = cookies.match(new RegExp(`(?:^|;\\s*)${key}=([^;]*)`));
        return match ? match[1] : null;
    }

    static getUin(cookies) {
        const uin = this.getValue(cookies, 'wxuin') || this.getValue(cookies, 'uin') || this.getValue(cookies, 'ptui_loginuin');
        if (!uin) return null;
        // Remove leading 'o' if present (common in QQ cookies like 'o123456')
        return uin.replace(/^o0*/, '');
    }
}

/**
 * Hashing utilities for QQ login
 */
class HashUtils {
    static hash(str) {
        let hash = 0;
        for (let i = 0; i < str.length; i++) {
            hash += (hash << 5) + str.charCodeAt(i);
        }
        return 2147483647 & hash;
    }

    static getGTk(pskey) {
        let gtk = 5381;
        for (let i = 0; i < pskey.length; i++) {
            gtk += (gtk << 5) + pskey.charCodeAt(i);
        }
        return gtk & 0x7fffffff;
    }
}

module.exports = { CookieUtils, HashUtils };