// ==UserScript==
// @name         DoubleDouble Tools
// @namespace    https://git.ponywave.de/Akamaru/Userscripts
// @version      1.0
// @description  Enhanced settings and features for DoubleDouble music downloader
// @author       Akamaru
// @match        https://doubledouble.top/*
// @match        https://eu.doubledouble.top/*
// @match        https://us.doubledouble.top/*
// @icon         https://www.google.com/s2/favicons?domain=eu.doubledouble.top&sz=32
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_addStyle
// @grant        GM_setClipboard
// @run-at       document-start
// @updateURL    https://git.ponywave.de/Akamaru/Userscripts/raw/branch/master/doubledouble-tools.user.js
// @downloadURL  https://git.ponywave.de/Akamaru/Userscripts/raw/branch/master/doubledouble-tools.user.js
// ==/UserScript==

(function() {
    'use strict';

    console.log('[DoubleDouble Tools] Script loaded');

    // Default settings
    const DEFAULT_SETTINGS = {
        uploadExternal: true,
        uploadService: 'pdrain',
        hideDownload: false,
        spotifyFormat: 'ogg',
        spotifyMetadata: true,
        hideQQDL: false,
        hideRecent: false,
        hideFooter: false,
        serverChoice: 'auto', // 'auto', 'eu', 'us'
        showDownloadLink: false
    };

    // Settings management
    function getSettings() {
        try {
            const stored = GM_getValue('doubledouble_settings', '{}');
            const settings = JSON.parse(stored);
            return { ...DEFAULT_SETTINGS, ...settings };
        } catch (e) {
            console.error('[DoubleDouble Tools] Error loading settings:', e);
            return DEFAULT_SETTINGS;
        }
    }

    function saveSettings(settings) {
        GM_setValue('doubledouble_settings', JSON.stringify(settings));
    }

    // Apply cosmetic settings (CSS)
    function applyCosmetics(settings) {
        let css = '';

        if (settings.hideQQDL) {
            css += '.lucida-link { display: none !important; }\n';
        }

        if (settings.hideRecent) {
            css += '#recently-downloaded { display: none !important; }\n';
        }

        if (settings.hideFooter) {
            css += '.footer { display: none !important; }\n';
        }

        // Settings icon styles
        css += `
            #dd-tools-settings-icon {
                position: fixed;
                top: 20px;
                right: 20px;
                z-index: 10000;
                background: #333;
                color: white;
                border: none;
                border-radius: 50%;
                width: 40px;
                height: 40px;
                font-size: 20px;
                cursor: pointer;
                box-shadow: 0 2px 8px rgba(0,0,0,0.3);
                transition: background 0.2s;
            }

            #dd-tools-settings-icon:hover {
                background: #555;
            }

            #dd-tools-modal {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: rgba(0,0,0,0.7);
                z-index: 10001;
                justify-content: center;
                align-items: center;
            }

            #dd-tools-modal.active {
                display: flex;
            }

            #dd-tools-modal-content {
                background: #1a1a1a;
                color: white;
                padding: 30px;
                border-radius: 10px;
                max-width: 500px;
                width: 90%;
                max-height: 80vh;
                overflow-y: auto;
                box-shadow: 0 4px 20px rgba(0,0,0,0.5);
            }

            #dd-tools-modal h2 {
                margin-top: 0;
                margin-bottom: 20px;
                font-size: 24px;
            }

            .dd-tools-section {
                margin-bottom: 25px;
                padding-bottom: 20px;
                border-bottom: 1px solid #333;
            }

            .dd-tools-section:last-child {
                border-bottom: none;
            }

            .dd-tools-section h3 {
                margin-top: 0;
                margin-bottom: 15px;
                font-size: 16px;
                color: #aaa;
                text-transform: uppercase;
                letter-spacing: 1px;
            }

            .dd-tools-option {
                margin-bottom: 12px;
                display: flex;
                align-items: center;
                gap: 10px;
            }

            .dd-tools-option label {
                flex: 1;
                cursor: pointer;
            }

            .dd-tools-option input[type="checkbox"] {
                cursor: pointer;
            }

            .dd-tools-option select {
                background: #333;
                color: white;
                border: 1px solid #555;
                border-radius: 4px;
                padding: 5px 10px;
                cursor: pointer;
            }

            #dd-tools-close {
                background: #d9534f;
                color: white;
                border: none;
                border-radius: 5px;
                padding: 10px 20px;
                cursor: pointer;
                font-size: 14px;
                margin-top: 20px;
                transition: background 0.2s;
            }

            #dd-tools-close:hover {
                background: #c9302c;
            }

            #dd-tools-download-link-display {
                position: fixed;
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
                background: #1a1a1a;
                color: white;
                padding: 30px;
                border-radius: 10px;
                z-index: 10002;
                box-shadow: 0 4px 20px rgba(0,0,0,0.5);
                min-width: 400px;
                display: none;
            }

            #dd-tools-download-link-display.active {
                display: block;
            }

            #dd-tools-download-link-display h3 {
                margin-top: 0;
            }

            #dd-tools-download-link-display input {
                width: 100%;
                background: #333;
                color: white;
                border: 1px solid #555;
                border-radius: 4px;
                padding: 8px;
                margin: 10px 0;
                font-family: monospace;
            }

            #dd-tools-download-link-display button {
                background: #5cb85c;
                color: white;
                border: none;
                border-radius: 5px;
                padding: 10px 20px;
                cursor: pointer;
                margin-right: 10px;
                transition: background 0.2s;
            }

            #dd-tools-download-link-display button:hover {
                background: #449d44;
            }

            #dd-tools-copy-link {
                background: #f0ad4e !important;
            }

            #dd-tools-copy-link:hover {
                background: #ec971f !important;
            }

            #dd-tools-download-link-display button.secondary {
                background: #777;
            }

            #dd-tools-download-link-display button.secondary:hover {
                background: #555;
            }
        `;

        GM_addStyle(css);
    }

    // Server redirect
    function handleServerRedirect(settings) {
        if (window.location.hostname === 'doubledouble.top' && settings.serverChoice !== 'auto') {
            const newUrl = window.location.href.replace('doubledouble.top', `${settings.serverChoice}.doubledouble.top`);
            window.location.href = newUrl;
        }
    }

    // Block /recent requests
    function blockRecentRequests(settings) {
        if (!settings.hideRecent) return;

        // Intercept fetch
        const originalFetch = window.fetch;
        window.fetch = function(...args) {
            const url = args[0];
            if (typeof url === 'string' && url.includes('/recent')) {
                console.log('[DoubleDouble Tools] Blocked fetch to /recent');
                return Promise.resolve(new Response('[]', {
                    status: 200,
                    headers: { 'Content-Type': 'application/json' }
                }));
            }
            return originalFetch.apply(this, args);
        };

        // Intercept XMLHttpRequest
        const originalOpen = XMLHttpRequest.prototype.open;
        XMLHttpRequest.prototype.open = function(method, url, ...rest) {
            if (typeof url === 'string' && url.includes('/recent')) {
                console.log('[DoubleDouble Tools] Blocked XMLHttpRequest to /recent');
                // Replace with dummy request
                return originalOpen.call(this, method, 'data:text/plain,[]', ...rest);
            }
            return originalOpen.call(this, method, url, ...rest);
        };
    }

    // Inject download interceptor into page context
    function interceptDownloads(settings) {
        if (!settings.showDownloadLink) return;

        const injectScript = () => {
            const script = document.createElement('script');
            script.textContent = `
                (function() {
                    console.log('[DoubleDouble Tools] Injecting window.open interceptor into page context');

                    const originalWindowOpen = window.open;
                    let isIntercepting = false;

                    window.open = function(url, target, ...rest) {
                        console.log('[DoubleDouble Tools] window.open called:', url, target);

                        // Check if this is a download from statusHandoff (target="_self" and url starts with ./)
                        if (!isIntercepting && target === '_self' && typeof url === 'string' && url.startsWith('./')) {
                            console.log('[DoubleDouble Tools] Intercepted download:', url);
                            isIntercepting = true;

                            // Dispatch custom event to show modal
                            const fullUrl = new URL(url, window.location.href).href;
                            window.dispatchEvent(new CustomEvent('dd-tools-show-download', { detail: fullUrl }));

                            setTimeout(() => { isIntercepting = false; }, 100);
                            return null;
                        }

                        return originalWindowOpen.call(this, url, target, ...rest);
                    };

                    console.log('[DoubleDouble Tools] window.open interceptor installed');
                })();
            `;

            (document.head || document.documentElement).appendChild(script);
            script.remove();
        };

        // Inject immediately or wait for head to exist
        if (document.head || document.documentElement) {
            injectScript();
        } else {
            const observer = new MutationObserver(() => {
                if (document.head || document.documentElement) {
                    injectScript();
                    observer.disconnect();
                }
            });
            observer.observe(document, { childList: true, subtree: true });
        }

        // Listen for the custom event to show the modal
        window.addEventListener('dd-tools-show-download', (e) => {
            console.log('[DoubleDouble Tools] Showing download modal for:', e.detail);
            showDownloadLinkModal(e.detail);
        });
    }

    // Show download link modal
    function showDownloadLinkModal(url) {
        const modal = document.getElementById('dd-tools-download-link-display');
        const input = document.getElementById('dd-tools-download-url-input');

        const fullUrl = new URL(url, window.location.href).href;
        input.value = fullUrl;
        modal.classList.add('active');
    }

    // Copy link to clipboard
    function copyLinkToClipboard(url) {
        GM_setClipboard(url);

        // Visual feedback
        const button = document.getElementById('dd-tools-copy-link');
        const originalText = button.textContent;
        button.textContent = 'Copied!';
        button.style.background = '#5cb85c';

        setTimeout(() => {
            button.textContent = originalText;
            button.style.background = '';
        }, 2000);
    }

    // Apply functional settings to page controls
    function applyFunctionalSettings(settings) {
        const externalCheckbox = document.getElementById('external');
        const siteSelect = document.getElementById('site');
        const privateCheckbox = document.getElementById('private');
        const formatSelect = document.getElementById('format');
        const metadataCheckbox = document.getElementById('metadata');

        if (externalCheckbox) externalCheckbox.checked = settings.uploadExternal;
        if (siteSelect) siteSelect.value = settings.uploadService;
        if (privateCheckbox) privateCheckbox.checked = settings.hideDownload;
        if (formatSelect) formatSelect.value = settings.spotifyFormat;
        if (metadataCheckbox) metadataCheckbox.checked = settings.spotifyMetadata;
    }

    // Create settings UI
    function createSettingsUI() {
        const settings = getSettings();

        // Settings icon
        const icon = document.createElement('button');
        icon.id = 'dd-tools-settings-icon';
        icon.innerHTML = '⚙️';
        icon.title = 'DoubleDouble Tools Settings';
        icon.addEventListener('click', () => {
            document.getElementById('dd-tools-modal').classList.add('active');
        });
        document.body.appendChild(icon);

        // Settings modal
        const modal = document.createElement('div');
        modal.id = 'dd-tools-modal';
        modal.innerHTML = `
            <div id="dd-tools-modal-content">
                <h2>DoubleDouble Tools Settings</h2>

                <div class="dd-tools-section">
                    <h3>Functional Settings</h3>

                    <div class="dd-tools-option">
                        <input type="checkbox" id="dd-setting-upload-external" ${settings.uploadExternal ? 'checked' : ''}>
                        <label for="dd-setting-upload-external">Upload to external service</label>
                    </div>

                    <div class="dd-tools-option">
                        <label for="dd-setting-upload-service">Upload service:</label>
                        <select id="dd-setting-upload-service">
                            <option value="pdrain" ${settings.uploadService === 'pdrain' ? 'selected' : ''}>pixeldrain.com</option>
                            <option value="litterbox" ${settings.uploadService === 'litterbox' ? 'selected' : ''}>litterbox.catbox.moe</option>
                            <option value="sendcm" ${settings.uploadService === 'sendcm' ? 'selected' : ''}>send.cm</option>
                        </select>
                    </div>

                    <div class="dd-tools-option">
                        <input type="checkbox" id="dd-setting-hide-download" ${settings.hideDownload ? 'checked' : ''}>
                        <label for="dd-setting-hide-download">Hide my download from "Recently Downloaded"</label>
                    </div>

                    <div class="dd-tools-option">
                        <label for="dd-setting-spotify-format">Spotify format:</label>
                        <select id="dd-setting-spotify-format">
                            <option value="ogg" ${settings.spotifyFormat === 'ogg' ? 'selected' : ''}>OGG 320kbps</option>
                            <option value="mp3" ${settings.spotifyFormat === 'mp3' ? 'selected' : ''}>MP3 320kbps</option>
                        </select>
                    </div>

                    <div class="dd-tools-option">
                        <input type="checkbox" id="dd-setting-spotify-metadata" ${settings.spotifyMetadata ? 'checked' : ''}>
                        <label for="dd-setting-spotify-metadata">Add metadata (Spotify)</label>
                    </div>
                </div>

                <div class="dd-tools-section">
                    <h3>Cosmetic Settings</h3>

                    <div class="dd-tools-option">
                        <input type="checkbox" id="dd-setting-hide-qqdl" ${settings.hideQQDL ? 'checked' : ''}>
                        <label for="dd-setting-hide-qqdl">Hide QQDL notice</label>
                    </div>

                    <div class="dd-tools-option">
                        <input type="checkbox" id="dd-setting-hide-recent" ${settings.hideRecent ? 'checked' : ''}>
                        <label for="dd-setting-hide-recent">Hide "Recently Downloaded" (blocks requests)</label>
                    </div>

                    <div class="dd-tools-option">
                        <input type="checkbox" id="dd-setting-hide-footer" ${settings.hideFooter ? 'checked' : ''}>
                        <label for="dd-setting-hide-footer">Hide footer</label>
                    </div>
                </div>

                <div class="dd-tools-section">
                    <h3>Advanced Settings</h3>

                    <div class="dd-tools-option">
                        <label for="dd-setting-server-choice">Server choice:</label>
                        <select id="dd-setting-server-choice">
                            <option value="auto" ${settings.serverChoice === 'auto' ? 'selected' : ''}>Auto (no redirect)</option>
                            <option value="eu" ${settings.serverChoice === 'eu' ? 'selected' : ''}>EU Server</option>
                            <option value="us" ${settings.serverChoice === 'us' ? 'selected' : ''}>US Server</option>
                        </select>
                    </div>

                    <div class="dd-tools-option">
                        <input type="checkbox" id="dd-setting-show-download-link" ${settings.showDownloadLink ? 'checked' : ''}>
                        <label for="dd-setting-show-download-link">Show download link instead of auto-download</label>
                    </div>
                </div>

                <button id="dd-tools-close">Close & Save</button>
            </div>
        `;
        document.body.appendChild(modal);

        // Close modal on background click
        modal.addEventListener('click', (e) => {
            if (e.target === modal) {
                saveSettingsFromUI();
                modal.classList.remove('active');
            }
        });

        // Close button
        document.getElementById('dd-tools-close').addEventListener('click', () => {
            saveSettingsFromUI();
            modal.classList.remove('active');
            // Reload to apply settings
            location.reload();
        });

        // Download link display modal
        const downloadModal = document.createElement('div');
        downloadModal.id = 'dd-tools-download-link-display';
        downloadModal.innerHTML = `
            <h3>Download Ready</h3>
            <p>Your download link:</p>
            <input type="text" id="dd-tools-download-url-input" readonly>
            <div>
                <button id="dd-tools-download-now">Download Now</button>
                <button id="dd-tools-copy-link">Copy Link</button>
                <button id="dd-tools-download-close" class="secondary">Close</button>
            </div>
        `;
        document.body.appendChild(downloadModal);

        // Download button
        document.getElementById('dd-tools-download-now').addEventListener('click', () => {
            const url = document.getElementById('dd-tools-download-url-input').value;
            window.location.href = url;
            downloadModal.classList.remove('active');
        });

        // Copy link button
        document.getElementById('dd-tools-copy-link').addEventListener('click', () => {
            const url = document.getElementById('dd-tools-download-url-input').value;
            copyLinkToClipboard(url);
        });

        // Close download modal
        document.getElementById('dd-tools-download-close').addEventListener('click', () => {
            downloadModal.classList.remove('active');
        });
    }

    // Save settings from UI
    function saveSettingsFromUI() {
        const newSettings = {
            uploadExternal: document.getElementById('dd-setting-upload-external').checked,
            uploadService: document.getElementById('dd-setting-upload-service').value,
            hideDownload: document.getElementById('dd-setting-hide-download').checked,
            spotifyFormat: document.getElementById('dd-setting-spotify-format').value,
            spotifyMetadata: document.getElementById('dd-setting-spotify-metadata').checked,
            hideQQDL: document.getElementById('dd-setting-hide-qqdl').checked,
            hideRecent: document.getElementById('dd-setting-hide-recent').checked,
            hideFooter: document.getElementById('dd-setting-hide-footer').checked,
            serverChoice: document.getElementById('dd-setting-server-choice').value,
            showDownloadLink: document.getElementById('dd-setting-show-download-link').checked
        };
        saveSettings(newSettings);
    }

    // Initialize
    function init() {
        try {
            const settings = getSettings();

            // Apply settings that need to run early (before DOM is ready)
            handleServerRedirect(settings);
            blockRecentRequests(settings);
            interceptDownloads(settings);
            applyCosmetics(settings);

            // Wait for DOM to be ready before creating UI
            if (document.readyState === 'loading') {
                document.addEventListener('DOMContentLoaded', () => {
                    try {
                        createSettingsUI();
                        applyFunctionalSettings(settings);
                    } catch (e) {
                        console.error('[DoubleDouble Tools] Error creating UI:', e);
                    }
                });
            } else {
                createSettingsUI();
                applyFunctionalSettings(settings);
            }
        } catch (e) {
            console.error('[DoubleDouble Tools] Error during initialization:', e);
        }
    }

    init();
})();