/*
 * Version: 1.0.0-lite
 * ChatStudio Lite - Module System
 * Module CRUD, import/export, module list rendering, AI module generator.
 * Module format: { id, name, desc, prompt, help, commands }
 */

const DEFAULT_MODULES = [
  {
    id: 'default',
    name: 'AI Chat',
    desc: 'General purpose AI assistant',
    prompt: 'You are a helpful AI assistant on WebX11 newOS4. Current date is injected dynamically. You have access to these tools:\n\n1. **Search:** /api/search?q=QUERY - Searches the web via DuckDuckGo/SearXNG. Returns results with titles, URLs, and snippets. Use this for current events, facts, and web information.\n2. **Fetch:** /api/fetch?url=URL - Fetches raw HTML from any URL. Use this to read web pages, APIs, or documents.\n3. **Extract:** /api/extract?url=URL - Extracts readable content (title, word count, excerpt, full text) from a URL. Prefer this over /fetch for reading articles.\n4. **Summarize:** /api/summarize?url=URL - AI summarization of a URL.\n\n**Tool-Use Rules:**\n- NEVER announce that you are about to use a tool (no "Hold on...", "Let me search...", "Fetching...", or waiting indicators). Just use the tool and present the result immediately.\n- If a /search returns generic/portal results (e.g., google.com homepages), automatically retry with a more specific query using site: operators or exact phrases in quotes.\n- If a user types a malformed command (e.g., /extraxt instead of /extract, /serch instead of /search), recognize their intent and suggest the correct command immediately: "Did you mean /extract [url]? Here are the available commands: /search, /fetch, /extract, /summarize"\n- When a user shares a URL, proactively suggest /extract or /fetch with the URL pre-filled.\n- Be concise. Deliver results, not commentary about the process.\n\n**Available slash commands:** /help, /search [query], /fetch [url], /extract [url], /summarize [url], /explain [code], /status, /models, /clear',
    help: 'Just type any question! I can help with:\n- Current events (I can search the web)\n- Web pages (I can extract/fetch URLs)\n- Coding questions\n- General knowledge\n- Problem solving\n\nCommands: /search, /fetch, /extract, /summarize, /explain, /status, /clear\n\nTry: /search latest news',
    commands: '/help, /search, /fetch, /extract, /summarize, /explain, /status, /models, /clear'
  },
  {
    id: 'search',
    name: 'Search',
    desc: 'Search the web for information',
    prompt: 'You are a web search assistant. When asked about current events, recent information, or things you dont know, suggest searching the web. Provide helpful search suggestions.',
    help: 'Use /search [query] to get search suggestions.\n\nExample: /search Python tutorials',
    commands: '/search, /find'
  },
  {
    id: 'fetch',
    name: 'URL Fetch',
    desc: 'Fetch content from URLs',
    prompt: 'You can fetch content from URLs using the fetch tool. When a user provides a URL, use the fetch tool to get its content.',
    help: 'Provide a URL and I can fetch its content.\n\nJust paste any URL in the chat!',
    commands: '/fetch, /get'
  },
  {
    id: 'summarize',
    name: 'Summarizer',
    desc: 'Summarize long text',
    prompt: 'You are a text summarization expert. When given text, provide a clear summary highlighting the key points.',
    help: 'Paste long text and Ill summarize it.\n\nUse /summary for a brief overview.',
    commands: '/summarize, /summary'
  },
  {
    id: 'plan',
    name: 'Planner',
    desc: 'Create plans and todo lists',
    prompt: 'You are a planning assistant. Help users break down tasks into steps, create schedules, and organize work.',
    help: 'Tell me what you want to accomplish and Ill help create a plan!\n\nCommands:\n- /plan [goal] - Create a plan\n- /todo - Show current todos',
    commands: '/plan, /todo'
  },
  {
    id: 'code',
    name: 'Code Helper',
    desc: 'Programming assistance',
    prompt: 'You are a coding expert. Help with code explanations, debugging, writing, and best practices. Provide clear, working code examples.',
    help: 'I can help with:\n- Explaining code\n- Debugging errors\n- Writing new code\n- Code reviews\n\nJust paste your code and ask!',
    commands: '/code, /debug, /explain'
  },
  {
    id: 'translate',
    name: 'Translator',
    desc: 'Translate between languages',
    prompt: 'You are a multilingual translator. Translate text between languages accurately while preserving meaning.',
    help: 'Translate text by specifying languages:\n\n- /translate [text] to [language]\n- /es Hello - translate to Spanish\n- /en Hola - translate to English',
    commands: '/translate, /es, /fr, /de, /zh'
  },
  {
    id: 'webx11-help',
    name: 'WebX11 Help',
    desc: 'Help with WebX11 Spaces',
    prompt: 'You are a WebX11 Spaces help assistant. Help users with:\n- Creating and managing their web space\n- Using the dashboard\n- Uploading files\n- Custom domains\n- Module system\n- Any technical questions',
    help: 'WebX11 Spaces Help:\n\n- Dashboard: Upload & manage files\n- Register: Create your space\n- Chat: AI assistant\n- Modules: Specialized tools\n\nType /help for more!',
    commands: '/help, /webx11, /space'
  }
];

// modules array lives on window.modules (set by _initLiteEngine in module-chatstudio.js)
// Do NOT redeclare here — just reference the global
var currentModule = 'default';
var editingModuleId = null;

var STORAGE_KEY = 'webx11_chat_modules';

function loadModules() {
  try {
    var saved = localStorage.getItem(STORAGE_KEY);
    if (saved) {
      modules = JSON.parse(b64_to_utf8(saved));
    } else {
      modules = JSON.parse(JSON.stringify(DEFAULT_MODULES));
      saveModules();
    }
  } catch (e) {
    console.warn('Failed to load modules:', e);
    modules = JSON.parse(JSON.stringify(DEFAULT_MODULES));
  }
  renderModuleList();
  updateHelpPanel();
}

function saveModules() {
  try {
    var encoded = utf8_to_b64(JSON.stringify(modules));
    localStorage.setItem(STORAGE_KEY, encoded);
  } catch (e) {
    console.warn('Failed to save modules:', e);
  }
}

function renderModuleList() {
  var list = document.getElementById('moduleList');
  list.innerHTML = modules.map(function (m) {
    var isActive = m.id === currentModule;
    var actions = m.id !== 'default'
      ? '<div class="module-actions">' +
        '<button class="module-action-btn" onclick="event.stopPropagation(); copyModule(\'' + escapeHtml(m.id) + '\')" title="Copy">Copy</button>' +
        '<button class="module-action-btn delete" onclick="event.stopPropagation(); deleteModule(\'' + escapeHtml(m.id) + '\')" title="Delete">Del</button>' +
        '</div>'
      : '';
    return '<div class="module-item' + (isActive ? ' active' : '') + '" onclick="switchModule(\'' + escapeHtml(m.id) + '\')" oncontextmenu="moduleContextMenu(event, \'' + escapeHtml(m.id) + '\')">' +
      '<div class="module-name">' + escapeHtml(m.name) + '</div>' +
      '<div class="module-desc">' + escapeHtml(m.desc) + '</div>' +
      actions +
      '</div>';
  }).join('');
}

function getCurrentModule() {
  return modules.find(function (m) { return m.id === currentModule; });
}

function switchModule(id) {
  currentModule = id;
  renderModuleList();
  updateHelpPanel();
  var found = modules.find(function (m) { return m.id === id; });
  showToast('Switched to ' + (found ? found.name : 'module'));
  addLog('Module', 'Switched to ' + (found ? found.name : id));
}

function updateHelpPanel() {
  var mod = modules.find(function (m) { return m.id === currentModule; });
  if (mod) {
    document.getElementById('helpTitle').textContent = mod.name;
    document.getElementById('helpText').textContent = mod.help || 'No help available.';
    var cmds = mod.commands ? mod.commands.split(',').map(function (c) { return c.trim(); }) : [];
    document.getElementById('helpCommands').innerHTML = cmds.map(function (c) {
      return '<span class="help-cmd">' + escapeHtml(c) + '</span>';
    }).join('');
  }
}

function moduleContextMenu(e, id) {
  e.preventDefault();
  if (id === 'default') return;
  var action = prompt('Module actions: edit, copy, delete (or cancel)');
  if (!action) return;
  var a = action.toLowerCase().trim();
  if (a === 'edit') {
    editModule(id);
  } else if (a === 'copy') {
    copyModule(id);
  } else if (a === 'delete') {
    deleteModule(id);
  }
}

function copyModule(id) {
  var mod = modules.find(function (m) { return m.id === id; });
  if (!mod) return;
  var newId = id + '_copy_' + Date.now();
  var newModule = JSON.parse(JSON.stringify(mod));
  newModule.id = newId;
  newModule.name = mod.name + ' (Copy)';
  modules.push(newModule);
  saveModules();
  renderModuleList();
  showToast('Module copied!');
}

function deleteModule(id) {
  if (!confirm('Delete this module?')) return;
  modules = modules.filter(function (m) { return m.id !== id; });
  if (currentModule === id) {
    currentModule = 'default';
  }
  saveModules();
  renderModuleList();
  updateHelpPanel();
  showToast('Module deleted');
}

function editModule(id) {
  openModuleModal(id);
}

function openModuleModal(editId) {
  editId = editId || null;
  editingModuleId = editId;
  document.getElementById('moduleModalTitle').textContent = editId ? 'Edit Module' : 'Add Module';

  if (editId) {
    var mod = modules.find(function (m) { return m.id === editId; });
    if (mod) {
      document.getElementById('moduleName').value = mod.name;
      document.getElementById('moduleDesc').value = mod.desc;
      document.getElementById('modulePrompt').value = mod.prompt;
      document.getElementById('moduleHelp').value = mod.help;
      document.getElementById('moduleCommands').value = mod.commands;
    }
  } else {
    document.getElementById('moduleName').value = '';
    document.getElementById('moduleDesc').value = '';
    document.getElementById('modulePrompt').value = '';
    document.getElementById('moduleHelp').value = '';
    document.getElementById('moduleCommands').value = '';
  }

  document.getElementById('aiModuleDesc').value = '';
  document.getElementById('moduleModal').classList.add('open');
}

function closeModuleModal() {
  document.getElementById('moduleModal').classList.remove('open');
  editingModuleId = null;
}

function saveModule() {
  var name = document.getElementById('moduleName').value.trim();
  var desc = document.getElementById('moduleDesc').value.trim();
  var prompt = document.getElementById('modulePrompt').value.trim();
  var help = document.getElementById('moduleHelp').value.trim();
  var commands = document.getElementById('moduleCommands').value.trim();

  if (!name) {
    showToast('Please enter a module name');
    return;
  }

  if (editingModuleId) {
    var idx = modules.findIndex(function (m) { return m.id === editingModuleId; });
    if (idx !== -1) {
      modules[idx] = {
        id: modules[idx].id,
        name: name,
        desc: desc,
        prompt: prompt,
        help: help,
        commands: commands
      };
    }
  } else {
    var id = name.toLowerCase().replace(/\s+/g, '-').replace(/[^a-z0-9-]/g, '');
    modules.push({
      id: id,
      name: name,
      desc: desc,
      prompt: prompt,
      help: help,
      commands: commands
    });
  }

  saveModules();
  renderModuleList();
  closeModuleModal();
  showToast(editingModuleId ? 'Module updated!' : 'Module added!');
}

// === AI Module Generator ===

async function generateModuleWithAI(evt) {
  var e = evt || window.event;
  var desc = document.getElementById('aiModuleDesc').value.trim();
  if (!desc) {
    showToast('Please describe what the module should do');
    return;
  }

  var btn = e ? e.target : null;
  if (!btn) {
    var modal = document.getElementById('moduleModal');
    btn = modal ? modal.querySelector('button[onclick*="generateModule"]') : null;
  }
  btn.disabled = true;
  btn.textContent = 'Generating...';

  try {
    var headers = { 'Content-Type': 'application/json' };
    if (typeof OLLAMA_API_KEY !== 'undefined' && OLLAMA_API_KEY) {
      headers['Authorization'] = 'Bearer ' + OLLAMA_API_KEY;
    }

    var response = await _csFetch((typeof OLLAMA_URL !== 'undefined' ? OLLAMA_URL : '/ollama') + '/api/generate', {
      method: 'POST',
      headers: headers,
      body: JSON.stringify({
        model: document.getElementById('modelSelect').value,
        prompt: 'Generate a chat module specification for WebX11 AI Chat.\n\nModule description: ' + desc + '\n\nRespond with a JSON object containing:\n{\n  "name": "Module Name",\n  "desc": "Short description (5-10 words)",\n  "prompt": "System prompt/instructions for the AI (2-3 sentences)",\n  "help": "How to use this module (3-5 bullet points)",\n  "commands": "comma-separated commands, at least 3"\n}\n\nOnly respond with valid JSON, no other text.',
        stream: false
      })
    });

    if (!response.ok) throw new Error('AI request failed');

    var data = await response.json();
    var result;
    try {
        result = JSON.parse(data.response);
    } catch (e) {
        showToast('AI response was not valid JSON. Try a different model.');
        btn.disabled = false;
        btn.textContent = 'Generate with AI';
        return;
    }

    document.getElementById('moduleName').value = result.name || '';
    document.getElementById('moduleDesc').value = result.desc || '';
    document.getElementById('modulePrompt').value = result.prompt || '';
    document.getElementById('moduleHelp').value = result.help || '';
    document.getElementById('moduleCommands').value = result.commands || '';

    showToast('Module generated! Review and save.');
  } catch (e) {
    console.error('Generation error:', e);
    showToast('Failed to generate: ' + e.message);
  } finally {
    btn.disabled = false;
    btn.textContent = 'Generate with AI';
  }
}

// === Import / Export ===

function exportModules() {
  var data = JSON.stringify(modules, null, 2);
  var blob = new Blob([data], { type: 'application/json' });
  var url = URL.createObjectURL(blob);
  var a = document.createElement('a');
  a.href = url;
  a.download = 'webx11-modules.json';
  a.click();
  URL.revokeObjectURL(url);
  showToast('Modules exported!');
}

function importModules() {
  var input = document.createElement('input');
  input.type = 'file';
  input.accept = '.json';
  input.onchange = async function (e) {
    var file = e.target.files[0];
    if (!file) return;
    if (file.size > 1048576) { showToast('File too large (max 1MB)'); return; }
    try {
      var text = await file.text();
      var imported = JSON.parse(text);
      if (!Array.isArray(imported)) { showToast('Invalid format: expected array'); return; }
      var valid = [];
      for (var i = 0; i < imported.length; i++) {
        var m = imported[i];
        if (!m || typeof m !== 'object') continue;
        if (typeof m.name !== 'string' || m.name.length > 80) continue;
        if (typeof m.desc !== 'string' || m.desc.length > 200) continue;
        if (typeof m.prompt !== 'string' || m.prompt.length > 10000) continue;
        if (m.help && typeof m.help !== 'string') continue;
        if (m.commands && typeof m.commands !== 'string') continue;
        // Sanitize ID — only allow a-z0-9-
        var rawId = typeof m.id === 'string' ? m.id : m.name.toLowerCase().replace(/\s+/g, '-');
        var safeId = rawId.toLowerCase().replace(/[^a-z0-9-]/g, '').substring(0, 64);
        if (!safeId) safeId = 'imported_' + Date.now();
        valid.push({
          id: safeId + '_imported',
          name: m.name,
          desc: m.desc || '',
          prompt: m.prompt || '',
          help: m.help || '',
          commands: m.commands || ''
        });
      }
      if (valid.length === 0) { showToast('No valid modules found in file'); return; }
      for (var i = 0; i < valid.length; i++) {
        modules.push(valid[i]);
      }
      saveModules();
      renderModuleList();
      updateHelpPanel();
      showToast(valid.length + ' module' + (valid.length > 1 ? 's' : '') + ' imported!');
    } catch (err) {
      showToast('Import failed: ' + err.message);
    }
  };
  input.click();
}


// Load modules from storage (runs after core.js)

// Auto-init — DOM is already ready when this script loads dynamically
if (document.getElementById('chat-overlay')) {
    loadModules();
}

// ═══ TTS + SST Integration ═══
var _chatTTS = false;
var _chatVoices = [];
var _chatMicRecording = false;
var _chatMediaRecorder = null;
var _chatAudioChunks = [];
var _chatRecordingTimeout = null;
var _chatSTTEndpoint = '/vmai-api/stt';

// Pre-load voices
if (typeof speechSynthesis !== 'undefined') {
    _chatVoices = speechSynthesis.getVoices() || [];
    if (_chatVoices.length === 0) {
        speechSynthesis.onvoiceschanged = function() {
            _chatVoices = speechSynthesis.getVoices() || [];
        };
    }
}

function toggleChatTTS() {
    _chatTTS = !_chatTTS;
    var btn = document.getElementById('chat-tts-btn');
    if (btn) {
        btn.style.borderColor = _chatTTS ? 'var(--success-color)' : '';
        btn.style.color = _chatTTS ? 'var(--success-color)' : '';
    }
    if (typeof addLog === 'function') addLog('TTS ' + (_chatTTS ? 'ON' : 'OFF'));
    if (typeof showToast === 'function') showToast('🔊 TTS ' + (_chatTTS ? 'ON' : 'OFF'));
}

function chatSpeakText(text) {
    if (!_chatTTS || typeof speechSynthesis === 'undefined') return;
    speechSynthesis.cancel();
    var clean = text.replace(/```[\s\S]*?```/g, ' code block ').replace(/[*_#|`>]/g, '').replace(/\n+/g, '. ').trim();
    if (!clean) return;
    function doSpeak(txt) {
        var utter = new SpeechSynthesisUtterance(txt);
        utter.rate = 1.0;
        utter.pitch = 1.0;
        var voice = _chatVoices.find(function(v) { return v.lang && v.lang.startsWith('en'); }) || (_chatVoices.length > 0 ? _chatVoices[0] : null);
        if (voice) utter.voice = voice;
        if (_chatVoices.length === 0) {
            var spoken = false;
            speechSynthesis.onvoiceschanged = function() {
                if (spoken) return; spoken = true;
                _chatVoices = speechSynthesis.getVoices() || [];
                var v = _chatVoices.find(function(v) { return v.lang && v.lang.startsWith('en'); }) || _chatVoices[0];
                if (v) utter.voice = v;
                speechSynthesis.cancel(); speechSynthesis.speak(utter);
                speechSynthesis.onvoiceschanged = null;
            };
            setTimeout(function() {
                if (!spoken) { spoken = true; speechSynthesis.onvoiceschanged = null; speechSynthesis.cancel(); speechSynthesis.speak(utter); }
            }, 2000);
        } else {
            speechSynthesis.speak(utter);
        }
    }
    if (clean.length > 500) {
        var chunks = clean.match(/.{1,500}/g);
        for (var i = 0; i < chunks.length; i++) doSpeak(chunks[i]);
    } else {
        doSpeak(clean);
    }
}

function toggleChatMic() {
    if (_chatMicRecording) {
        stopChatRecording();
    } else {
        startChatRecording();
    }
}

function startChatRecording() {
    if (!navigator.mediaDevices || !navigator.mediaDevices.getUserMedia) {
        if (typeof showToast === 'function') showToast('🎤 Audio recording not supported');
        return;
    }
    _chatMicRecording = true;
    _chatAudioChunks = [];
    var btn = document.getElementById('chat-mic-btn');
    if (btn) { btn.textContent = '🔴'; btn.style.borderColor = 'var(--success-color)'; btn.style.color = 'var(--success-color)'; }
    if (typeof addLog === 'function') addLog('🎤 Recording... (tap mic again to stop)');

    navigator.mediaDevices.getUserMedia({ audio: true })
        .then(function(stream) {
            var mimeType = MediaRecorder.isTypeSupported('audio/webm;codecs=opus') ? 'audio/webm;codecs=opus'
                : MediaRecorder.isTypeSupported('audio/webm') ? 'audio/webm' : '';
            _chatMediaRecorder = new MediaRecorder(stream, mimeType ? { mimeType: mimeType } : {});
            _chatMediaRecorder.ondataavailable = function(e) { if (e.data.size > 0) _chatAudioChunks.push(e.data); };
            _chatMediaRecorder.onstop = function() {
                stream.getTracks().forEach(function(t) { t.stop(); });
                transcribeChatAudio();
            };
            _chatMediaRecorder.start();
            _chatRecordingTimeout = setTimeout(function() {
                if (_chatMediaRecorder && _chatMediaRecorder.state === 'recording') _chatMediaRecorder.stop();
            }, 10000);
        })
        .catch(function(err) {
            if (typeof showToast === 'function') showToast('🎤 Mic denied: ' + err.message);
            _chatMicRecording = false;
            var btn = document.getElementById('chat-mic-btn');
            if (btn) { btn.textContent = '🎤'; btn.style.borderColor = ''; btn.style.color = ''; }
        });
}

function stopChatRecording() {
    if (_chatMediaRecorder && _chatMediaRecorder.state === 'recording') {
        _chatMediaRecorder.stop();
        clearTimeout(_chatRecordingTimeout);
    }
    _chatMicRecording = false;
    var btn = document.getElementById('chat-mic-btn');
    if (btn) { btn.textContent = '🎤'; btn.style.borderColor = ''; btn.style.color = ''; }
}

function transcribeChatAudio() {
    var blob = new Blob(_chatAudioChunks, { type: _chatMediaRecorder ? _chatMediaRecorder.mimeType || 'audio/webm' : 'audio/webm' });
    if (blob.size < 100) {
        if (typeof addLog === 'function') addLog('🎤 No audio detected');
        return;
    }
    if (typeof addLog === 'function') addLog('🎤 Transcribing...');
    var reader = new FileReader();
    reader.onload = async function() {
        try {
            var ctx = new (window.AudioContext || window.webkitAudioContext)();
            var audioBuffer = await ctx.decodeAudioData(reader.result);
            var pcmData = chatAudioBufferToWav(audioBuffer);
            var b64 = btoa(String.fromCharCode.apply(null, new Uint8Array(pcmData)));
            var resp = await fetch(_chatSTTEndpoint, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ audio: b64, sample_rate: 16000 })
            });
            var data = await resp.json();
            var text = (data.text || '').trim();
            if (text) {
                if (typeof addLog === 'function') addLog('🎤 Recognized: "' + text + '"');
                var input = document.getElementById('chatInput');
                if (input) { input.value = text; input.focus(); }
            } else {
                if (typeof addLog === 'function') addLog('🎤 No speech detected');
            }
        } catch (err) {
            if (typeof addLog === 'function') addLog('🎤 Transcription error: ' + err.message);
        }
    };
    reader.readAsArrayBuffer(blob);
}

function chatAudioBufferToWav(audioBuffer) {
    var targetSampleRate = 16000;
    var src = audioBuffer.getChannelData(0);
    var srcRate = audioBuffer.sampleRate;
    var ratio = srcRate / targetSampleRate;
    var newLen = Math.round(src.length / ratio);
    var pcm = new Int16Array(newLen);
    for (var i = 0; i < newLen; i++) {
        var srcIdx = Math.round(i * ratio);
        var sample = Math.max(-1, Math.min(1, src[Math.min(srcIdx, src.length - 1)]));
        pcm[i] = sample < 0 ? sample * 0x8000 : sample * 0x7FFF;
    }
    var buffer = new ArrayBuffer(44 + pcm.byteLength);
    var view = new DataView(buffer);
    var writeStr = function(off, str) { for (var j = 0; j < str.length; j++) view.setUint8(off + j, str.charCodeAt(j)); };
    writeStr(0, 'RIFF'); view.setUint32(4, 36 + pcm.byteLength, true); writeStr(8, 'WAVE');
    writeStr(12, 'fmt '); view.setUint32(16, 16, true); view.setUint16(20, 1, true); view.setUint16(22, 1, true);
    view.setUint32(24, targetSampleRate, true); view.setUint32(28, targetSampleRate * 2, true);
    view.setUint16(32, 2, true); view.setUint16(34, 16, true);
    writeStr(36, 'data'); view.setUint32(40, pcm.byteLength, true);
    new Uint8Array(buffer, 44).set(new Uint8Array(pcm.buffer));
    return buffer;
}