// ==UserScript==
// @name         Medium Member Bypass
// @author       UniverseDev
// @license      GPL-3.0-or-later
// @namespace    http://tampermonkey.net/
// @version      13.5
// @description  Modern Medium GUI with multiple bypass services and fallback with availability checks.
// @match        *://*.medium.com/*
// @match        https://freedium.cfd/*
// @match        https://readmedium.com/*
// @match        https://md.vern.cc/*
// @match        https://archive.is/*
// @match        https://archive.li/*
// @match        https://archive.vn/*
// @match        https://archive.ph/*
// @grant        GM_registerMenuCommand
// @grant        GM_setValue
// @grant        GM_getValue
// @connect      freedium.cfd
// @connect      readmedium.com
// @connect      md.vern.cc
// @connect      archive.is
// @connect      archive.li
// @connect      archive.vn
// @connect      archive.ph
// @downloadURL none
// ==/UserScript==

(() => {
    'use strict';

    const config = {
        bypassUrls: {
            freedium: 'https://freedium.cfd',
            readmedium: 'https://readmedium.com',
            libmedium: 'https://md.vern.cc/',
            archive: 'https://archive.is/newest/',
            archiveLi: 'https://archive.li/newest/',
            archiveVn: 'https://archive.vn/newest/',
            archivePh: 'https://archive.ph/newest/',
        },
        currentBypassIndex: GM_getValue('currentBypassIndex', 0),
        memberOnlyDivSelector: 'p.bf.b.bg.z.bk',
        autoRedirectDelay: GM_getValue('redirectDelay', 5000),
        autoRedirectEnabled: GM_getValue('autoRedirect', true),
        darkModeEnabled: GM_getValue('darkModeEnabled', false),
        isBypassSession: GM_getValue('isBypassSession', false),
    };

    const bypassServiceKeys = Object.keys(config.bypassUrls);

    const injectStyles = () => {
        const style = document.createElement('style');
        style.textContent = `
            .medium-settings {
                position: fixed;
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
                width: 360px;
                background-color: var(--background-color, white);
                box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
                border-radius: 16px;
                font-family: 'Arial', sans-serif;
                z-index: 10000;
                padding: 20px;
                display: none;
                color: var(--text-color, #333);
                cursor: grab;
            }
            .medium-settings.dark {
                --background-color: #333;
                --text-color: white;
            }
            .medium-settings-header {
                font-size: 22px;
                font-weight: bold;
                margin-bottom: 20px;
                text-align: center;
            }
            .medium-settings-toggle {
                margin: 15px 0;
                display: flex;
                justify-content: space-between;
                align-items: center;
            }
            .medium-settings-toggle > span {
                flex-grow: 1;
            }
            .medium-settings-input {
                margin-left: 10px;
                padding: 8px 10px;
                border: 1px solid #ccc;
                border-radius: 8px;
                box-sizing: border-box;
            }
            .medium-settings-input#redirectDelay {
                width: 70px;
            }
            .medium-settings-input#bypassSelector {
                width: 120px;
                appearance: auto;
                -webkit-appearance: auto;
                -moz-appearance: auto;
                background-repeat: no-repeat;
                background-position: right 10px center;
            }
            .medium-settings.dark .medium-settings-input#bypassSelector {
                border-color: #666;
            }
            .medium-settings-button {
                background-color: var(--button-bg-color, #1a8917);
                color: var(--button-text-color, white);
                border: none;
                padding: 8px 14px;
                border-radius: 20px;
                cursor: pointer;
                font-weight: bold;
                transition: background-color 0.3s;
            }
            .medium-settings-button:hover {
                background-color: #155c11;
            }
            .medium-notification {
                position: fixed;
                bottom: 20px;
                right: 20px;
                background-color: #1a8917;
                color: white;
                padding: 15px;
                border-radius: 20px;
                box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
                font-family: 'Arial', sans-serif;
                z-index: 10000;
                opacity: 0;
                transform: translateY(20px);
                transition: all 0.3s ease;
            }
            .medium-notification.show {
                opacity: 1;
                transform: translateY(0);
            }
            .medium-settings-input:focus {
                outline: none;
                border-color: #1a8917;
                box-shadow: 0 0 5px rgba(26, 137, 23, 0.3);
            }
        `;
        document.head.appendChild(style);
    };

    const stealthNotification = (message) => {
        const notification = document.createElement('div');
        notification.className = 'medium-notification';
        notification.textContent = message;
        document.body.appendChild(notification);

        setTimeout(() => notification.classList.add('show'), 50);
        setTimeout(() => {
            notification.classList.remove('show');
            setTimeout(() => notification.remove(), 300);
        }, 3000);
    };

    const getCurrentBypassService = () => {
        return bypassServiceKeys[config.currentBypassIndex % bypassServiceKeys.length];
    };

    const switchToNextBypassService = () => {
        config.currentBypassIndex++;
        GM_setValue('currentBypassIndex', config.currentBypassIndex);
        stealthNotification(`Trying next bypass service: ${getCurrentBypassService()}`);
    };

    const isServiceAvailable = async (url) => {
        try {
            const response = await fetch(url, { method: 'HEAD', mode: 'no-cors' });
            return response.ok || response.type === 'opaque';
        } catch (error) {
            console.error(`Service unavailable: ${url}`, error);
            return false;
        }
    };

    const autoBypass = async (articleUrl, bypassKey, attemptNumber = 1) => {
        const bypassUrlValue = config.bypassUrls[bypassKey];
        const testUrl = bypassUrlValue.endsWith('/') ? bypassUrlValue : bypassUrlValue + '/';

        const isAvailable = await isServiceAvailable(testUrl);
        if (!isAvailable) {
            stealthNotification(`Service unavailable: ${bypassKey}`);
            switchToNextBypassService();
            const nextBypassService = getCurrentBypassService();
            autoBypass(articleUrl, nextBypassService, attemptNumber + 1);
            return;
        }

        try {
            const bypassUrl = bypassUrlValue.endsWith('/')
                ? bypassUrlValue + articleUrl
                : bypassUrlValue + window.location.pathname;

            window.location.href = bypassUrl;

            setTimeout(() => {
                if (window.location.hostname.includes('medium.com') && document.querySelector(config.memberOnlyDivSelector)) {
                    stealthNotification(`Bypass with ${bypassKey} failed.`);
                    switchToNextBypassService();
                    const nextBypassService = getCurrentBypassService();
                    autoBypass(articleUrl, nextBypassService, attemptNumber + 1);
                } else {
                    console.log(`Bypass with ${bypassKey} likely successful.`);
                }
            }, 2000);
        } catch (error) {
            console.error(`Error attempting bypass with ${bypassKey}`, error);
            stealthNotification(`Bypass with ${bypassKey} failed due to an error.`);
            switchToNextBypassService();
            const nextBypassService = getCurrentBypassService();
            autoBypass(articleUrl, nextBypassService, attemptNumber + 1);
        }
    };

    const showMediumSettings = () => {
        let existingPanel = document.querySelector('.medium-settings');
        if (existingPanel) {
            existingPanel.style.display = 'block';
            return;
        }

        const settingsContainer = document.createElement('div');
        settingsContainer.className = `medium-settings ${config.darkModeEnabled ? 'dark' : ''}`;

        settingsContainer.innerHTML = `
            <div class="medium-settings-header">Medium Settings</div>
            <div class="medium-settings-toggle">
                <span>Auto-Redirect</span>
                <button class="medium-settings-button" id="toggleRedirect">${config.autoRedirectEnabled ? 'ON' : 'OFF'}</button>
            </div>
            <div class="medium-settings-toggle">
                <span>Redirect Delay (ms)</span>
                <input type="number" class="medium-settings-input" id="redirectDelay" value="${config.autoRedirectDelay}" />
            </div>
            <div class="medium-settings-toggle">
                <span>Dark Mode</span>
                <button class="medium-settings-button" id="toggleDarkMode">${config.darkModeEnabled ? 'ON' : 'OFF'}</button>
            </div>
            <div class="medium-settings-toggle">
                <span>Bypass Service</span>
                <select id="bypassSelector" class="medium-settings-input">
                    ${bypassServiceKeys.map((key, index) => `
                        <option value="${key}" ${index === config.currentBypassIndex ? 'selected' : ''}>${key}</option>
                    `).join('')}
                </select>
            </div>
            <div class="medium-settings-toggle">
                <button class="medium-settings-button" id="bypassNow">Bypass Now</button>
            </div>
            <div class="medium-settings-toggle">
                <button class="medium-settings-button" id="resetDefaults">Reset to Default</button>
            </div>
            <div class="medium-settings-toggle">
                <button class="medium-settings-button" id="saveSettings">Save</button>
                <button class="medium-settings-button" id="closeSettings">Close</button>
            </div>
        `;

        document.body.appendChild(settingsContainer);

        let isDragging = false;
        let startX, startY;

        settingsContainer.addEventListener('mousedown', (e) => {
            isDragging = true;
            startX = e.clientX - settingsContainer.offsetLeft;
            startY = e.clientY - settingsContainer.offsetTop;
            settingsContainer.style.cursor = 'grabbing';
        });

        document.addEventListener('mousemove', (e) => {
            if (!isDragging) return;
            settingsContainer.style.left = `${e.clientX - startX}px`;
            settingsContainer.style.top = `${e.clientY - startY}px`;
        });

        document.addEventListener('mouseup', () => {
            isDragging = false;
            settingsContainer.style.cursor = 'grab';
        });

        settingsContainer.querySelector('#bypassSelector').addEventListener('change', (e) => {
            const selectedKey = e.target.value;
            config.currentBypassIndex = bypassServiceKeys.indexOf(selectedKey);
            GM_setValue('currentBypassIndex', config.currentBypassIndex);
            stealthNotification(`Bypass service set to ${selectedKey}`);
        });

        settingsContainer.querySelector('#toggleRedirect').addEventListener('click', () => {
            config.autoRedirectEnabled = !config.autoRedirectEnabled;
            GM_setValue('autoRedirect', config.autoRedirectEnabled);
            settingsContainer.querySelector('#toggleRedirect').textContent = config.autoRedirectEnabled ? 'ON' : 'OFF';
            stealthNotification('Auto-Redirect toggled');
        });

        settingsContainer.querySelector('#toggleDarkMode').addEventListener('click', () => {
            config.darkModeEnabled = !config.darkModeEnabled;
            GM_setValue('darkModeEnabled', config.darkModeEnabled);
            settingsContainer.classList.toggle('dark', config.darkModeEnabled);
            settingsContainer.querySelector('#toggleDarkMode').textContent = config.darkModeEnabled ? 'ON' : 'OFF';
            stealthNotification('Dark Mode toggled');
        });

        settingsContainer.querySelector('#bypassNow').addEventListener('click', async () => {
            const articleUrl = encodeURIComponent(window.location.href);
            const bypassService = getCurrentBypassService();
            await autoBypass(articleUrl, bypassService);
        });

        settingsContainer.querySelector('#resetDefaults').addEventListener('click', () => {
            config.autoRedirectDelay = 5000;
            config.autoRedirectEnabled = true;
            config.darkModeEnabled = false;
            config.currentBypassIndex = 0;

            GM_setValue('redirectDelay', config.autoRedirectDelay);
            GM_setValue('autoRedirect', config.autoRedirectEnabled);
            GM_setValue('darkModeEnabled', config.darkModeEnabled);
            GM_setValue('currentBypassIndex', config.currentBypassIndex);

            settingsContainer.querySelector('#redirectDelay').value = config.autoRedirectDelay;
            settingsContainer.querySelector('#toggleRedirect').textContent = 'ON';
            settingsContainer.querySelector('#toggleDarkMode').textContent = 'OFF';
            settingsContainer.querySelector('#bypassSelector').selectedIndex = 0;
            settingsContainer.classList.remove('dark');
            stealthNotification('Settings reset to defaults');
        });

        settingsContainer.querySelector('#saveSettings').addEventListener('click', () => {
            const newDelay = parseInt(settingsContainer.querySelector('#redirectDelay').value, 10);
            if (!isNaN(newDelay) && newDelay >= 0) {
                config.autoRedirectDelay = newDelay;
                GM_setValue('redirectDelay', newDelay);
                stealthNotification('Settings saved');
            }
        });

        settingsContainer.querySelector('#closeSettings').addEventListener('click', () => {
            settingsContainer.style.display = 'none';
        });

        settingsContainer.style.display = 'block';
    };

    const performAutoRedirect = async () => {
        if (config.isBypassSession) {
            GM_setValue('isBypassSession', false);
            return;
        }

        const checkAllServices = async () => {
            const unavailableServices = [];
            for (const key of bypassServiceKeys) {
                const testUrl = config.bypassUrls[key];
                const isAvailable = await isServiceAvailable(testUrl);
                if (!isAvailable) {
                    unavailableServices.push(key);
                }
            }

            if (unavailableServices.length === bypassServiceKeys.length) {
                stealthNotification('All bypass services are currently unavailable.');
                return true; // Indicate all services are unavailable
            }
            return false; // Indicate some services might be available
        };

        if (config.autoRedirectEnabled && document.querySelector(config.memberOnlyDivSelector)) {
            if (await checkAllServices()) {
                return; // Don't attempt bypass if all services are down
            }
            setTimeout(async () => {
                const articleUrl = encodeURIComponent(window.location.href);
                const bypassService = getCurrentBypassService();

                await autoBypass(articleUrl, bypassService);
            }, config.autoRedirectDelay);
            stealthNotification(`Attempting bypass with ${getCurrentBypassService()}...`);
        }
    };

    const cleanBypassFragment = () => {
        const archiveDomains = ['archive.is', 'archive.li', 'archive.vn', 'archive.ph'];
        const currentDomain = window.location.hostname;

        if (archiveDomains.includes(currentDomain) && window.location.hash === '#bypass') {
            const cleanUrl = window.location.href.replace('#bypass', '');
            window.location.replace(cleanUrl);
        }
    };

    const initializeScript = () => {
        cleanBypassFragment();

        injectStyles();

        const isBypassPage = Object.values(config.bypassUrls).some((url) => window.location.href.startsWith(url) || bypassServiceKeys.some(key => key.startsWith('archive') && window.location.href.startsWith(config.bypassUrls[key])));

        if (isBypassPage) {
            GM_setValue('isBypassSession', true);
        } else if (window.location.href.startsWith('https://medium.com/')) {
            GM_registerMenuCommand('Open Medium Settings', showMediumSettings);
            performAutoRedirect();
        }
    };

    initializeScript();
})();