/* ===================================================
   JAESWIFT.XYZ — JAE-AI Chat Terminal
   Venice API chat interface + Memoria-style memory
   =================================================== */

(function () {
    'use strict';

    const chatMessages = document.getElementById('chatMessages');
    const chatInput = document.getElementById('chatInput');
    const chatSend = document.getElementById('chatSend');
    const chatStatus = document.getElementById('chatStatus');
    const chatHeader = document.querySelector('.chat-terminal .panel-header');

    if (!chatMessages || !chatInput || !chatSend) return;

    const mem = window.chatMemory || null;

    let history = [];
    let isWaiting = false;

    // ─── Render a message bubble ───
    function addMessage(role, text) {
        const welcome = chatMessages.querySelector('.chat-welcome');
        if (welcome) welcome.remove();

        const msg = document.createElement('div');
        msg.className = `chat-msg chat-msg-${role}`;

        const label = document.createElement('span');
        label.className = 'chat-msg-label';
        label.textContent = role === 'user' ? 'YOU' : 'JAE-AI';

        const body = document.createElement('div');
        body.className = 'chat-msg-body';
        body.textContent = text;

        msg.appendChild(label);
        msg.appendChild(body);
        chatMessages.appendChild(msg);
        chatMessages.scrollTop = chatMessages.scrollHeight;
        return body;
    }

    // ─── Typing indicator ───
    function showTyping() {
        const indicator = document.createElement('div');
        indicator.className = 'chat-msg chat-msg-assistant chat-typing-indicator';
        indicator.id = 'chatTyping';
        indicator.innerHTML = `
            <span class="chat-msg-label">JAE-AI</span>
            <div class="chat-msg-body">
                <span class="typing-dot"></span>
                <span class="typing-dot"></span>
                <span class="typing-dot"></span>
            </div>
        `;
        chatMessages.appendChild(indicator);
        chatMessages.scrollTop = chatMessages.scrollHeight;
    }

    function hideTyping() {
        const el = document.getElementById('chatTyping');
        if (el) el.remove();
    }

    // ─── Typewriter effect ───
    function typewriterEffect(element, text, speed) {
        speed = speed || 12;
        let i = 0;
        element.textContent = '';
        return new Promise(function (resolve) {
            function tick() {
                if (i < text.length) {
                    element.textContent += text.charAt(i);
                    i++;
                    chatMessages.scrollTop = chatMessages.scrollHeight;
                    setTimeout(tick, speed);
                } else {
                    resolve();
                }
            }
            tick();
        });
    }

    // ─── Restore previous chat history from localStorage ───
    function restoreHistory() {
        if (!mem) return false;
        const saved = mem.getHistory();
        if (!saved || saved.length === 0) return false;

        // Remove welcome and render saved history
        const welcome = chatMessages.querySelector('.chat-welcome');
        if (welcome) welcome.remove();

        saved.forEach(function (m) {
            const role = m.role === 'user' ? 'user' : 'assistant';
            const label = document.createElement('span');
            label.className = 'chat-msg-label';
            label.textContent = role === 'user' ? 'YOU' : 'JAE-AI';
            const body = document.createElement('div');
            body.className = 'chat-msg-body';
            body.textContent = m.content || '';
            const el = document.createElement('div');
            el.className = `chat-msg chat-msg-${role}`;
            el.appendChild(label);
            el.appendChild(body);
            chatMessages.appendChild(el);
        });

        // Divider showing restore
        const divider = document.createElement('div');
        divider.className = 'chat-divider';
        divider.innerHTML = '<span>— RESTORED FROM MEMORY —</span>';
        chatMessages.appendChild(divider);

        chatMessages.scrollTop = chatMessages.scrollHeight;

        // populate in-memory history
        history = saved.slice();
        return true;
    }

    // ─── Send message to API ───
    async function sendMessage() {
        const text = chatInput.value.trim();
        if (!text || isWaiting) return;

        isWaiting = true;
        chatInput.value = '';
        chatStatus.textContent = '● PROCESSING';
        chatStatus.classList.remove('status-green');
        chatStatus.classList.add('status-amber');

        addMessage('user', text);
        history.push({ role: 'user', content: text });
        if (mem) mem.appendHistory({ role: 'user', content: text });

        showTyping();

        // Build memory context block
        const memoryBlock = mem ? mem.getContextBlock(text) : '';

        try {
            const resp = await fetch('/api/chat', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    message: text,
                    history: history.slice(0, -1),
                    memory_context: memoryBlock
                })
            });

            hideTyping();

            if (!resp.ok) {
                const err = await resp.json().catch(function () { return {}; });
                addMessage('assistant', 'ERROR: ' + (err.error || 'Connection failed'));
                chatStatus.textContent = '● ERROR';
                chatStatus.classList.remove('status-amber');
                chatStatus.classList.add('status-red');
                isWaiting = false;
                return;
            }

            const data = await resp.json();
            const reply = data.reply || 'No response received.';

            history.push({ role: 'assistant', content: reply });
            if (mem) mem.appendHistory({ role: 'assistant', content: reply });

            if (history.length > 40) history = history.slice(-30);

            const bodyEl = addMessage('assistant', '');
            await typewriterEffect(bodyEl, reply, 10);

            // Trigger memory extraction every N user messages (non-blocking)
            if (mem) {
                mem.incrementUserMsgAndMaybeExtract().catch(function () { /* silent */ });
            }

        } catch (e) {
            hideTyping();
            addMessage('assistant', 'ERROR: Network failure — ' + e.message);
            chatStatus.textContent = '● OFFLINE';
            chatStatus.classList.remove('status-amber');
            chatStatus.classList.add('status-red');
        }

        chatStatus.textContent = '● ONLINE';
        chatStatus.classList.remove('status-amber', 'status-red');
        chatStatus.classList.add('status-green');
        isWaiting = false;
        chatInput.focus();
    }

    // ─── Memory modal ───
    function formatDate(ts) {
        try { return new Date(ts).toLocaleString('en-GB'); } catch (e) { return ''; }
    }

    function renderMemoryModal() {
        if (!mem) return;
        const existing = document.getElementById('memModal');
        if (existing) { existing.remove(); return; }

        const modal = document.createElement('div');
        modal.id = 'memModal';
        modal.className = 'mem-modal';

        const all = mem.getAll();
        const grouped = {};
        all.forEach(function (m) {
            const c = m.category || 'other';
            if (!grouped[c]) grouped[c] = [];
            grouped[c].push(m);
        });

        const categories = ['identity', 'preference', 'project', 'skill', 'goal', 'relationship', 'other'];
        const order = categories.filter(function (c) { return grouped[c]; })
            .concat(Object.keys(grouped).filter(function (c) { return categories.indexOf(c) === -1; }));

        let bodyHTML = '';
        if (all.length === 0) {
            bodyHTML = '<div class="mem-empty">NO MEMORIES STORED // CHAT TO BUILD PROFILE</div>';
        } else {
            order.forEach(function (cat) {
                bodyHTML += '<div class="mem-group"><div class="mem-group-title">' + cat.toUpperCase() + ' <span class="mem-count">(' + grouped[cat].length + ')</span></div>';
                grouped[cat].sort(function (a, b) { return (b.timestamp || 0) - (a.timestamp || 0); }).forEach(function (m) {
                    bodyHTML += '<div class="mem-item" data-id="' + m.id + '">' +
                        '<div class="mem-item-text">' + escapeHtml(m.text) + '</div>' +
                        '<div class="mem-item-meta">imp: ' + (m.importance || 0).toFixed(2) + ' // ' + formatDate(m.timestamp) + '</div>' +
                        '<button class="mem-del" data-id="' + m.id + '" title="Delete">×</button>' +
                        '</div>';
                });
                bodyHTML += '</div>';
            });
        }

        modal.innerHTML = `
            <div class="mem-modal-inner">
                <div class="mem-modal-header">
                    <span class="mem-modal-title">🧠 JAE-AI MEMORY VAULT</span>
                    <button class="mem-close" id="memClose">× CLOSE</button>
                </div>
                <div class="mem-modal-subtitle">STORED LOCALLY // ${all.length} MEMORIES // NEVER LEAVES DEVICE</div>
                <div class="mem-modal-body">${bodyHTML}</div>
                <div class="mem-modal-footer">
                    <button class="mem-btn mem-btn-export" id="memExport">⬇ EXPORT JSON</button>
                    <button class="mem-btn mem-btn-extract" id="memExtract">⚡ FORCE EXTRACT</button>
                    <button class="mem-btn mem-btn-clearhist" id="memClearHist">🗑 CLEAR HISTORY</button>
                    <button class="mem-btn mem-btn-clear" id="memClear">⚠ CLEAR ALL MEMORIES</button>
                </div>
            </div>
        `;

        document.body.appendChild(modal);

        document.getElementById('memClose').addEventListener('click', function () { modal.remove(); });
        modal.addEventListener('click', function (e) {
            if (e.target === modal) modal.remove();
        });

        modal.querySelectorAll('.mem-del').forEach(function (btn) {
            btn.addEventListener('click', function () {
                const id = btn.getAttribute('data-id');
                mem.remove(id);
                renderMemoryModal(); renderMemoryModal(); // toggle off/on to refresh
            });
        });

        document.getElementById('memExport').addEventListener('click', function () {
            const blob = new Blob([mem.exportJSON()], { type: 'application/json' });
            const url = URL.createObjectURL(blob);
            const a = document.createElement('a');
            a.href = url;
            a.download = 'jae-ai-memory-' + Date.now() + '.json';
            a.click();
            setTimeout(function () { URL.revokeObjectURL(url); }, 1000);
        });

        document.getElementById('memExtract').addEventListener('click', function () {
            const btn = document.getElementById('memExtract');
            btn.disabled = true;
            btn.textContent = '⌛ EXTRACTING...';
            mem.extractFromRecentChat().then(function () {
                renderMemoryModal(); renderMemoryModal();
            }).catch(function () {
                btn.textContent = '✖ EXTRACT FAILED';
            });
        });

        document.getElementById('memClearHist').addEventListener('click', function () {
            if (confirm('Clear chat history? Memories will be kept.')) {
                mem.clearHistory();
                alert('Chat history cleared. Reload the page.');
            }
        });

        document.getElementById('memClear').addEventListener('click', function () {
            if (confirm('PERMANENTLY DELETE ALL MEMORIES? This cannot be undone.')) {
                mem.clear();
                renderMemoryModal(); renderMemoryModal();
            }
        });
    }

    function escapeHtml(s) {
        return String(s || '').replace(/[&<>"']/g, function (c) {
            return ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;' })[c];
        });
    }

    // ─── Inject memory button + privacy info into chat header ───
    function injectMemoryUI() {
        if (!chatHeader) return;
        if (document.getElementById('memBtn')) return;

        const btn = document.createElement('button');
        btn.id = 'memBtn';
        btn.className = 'chat-mem-btn';
        btn.title = 'View / manage local memories';
        btn.innerHTML = '🧠 <span class="chat-mem-count" id="memBtnCount">0</span>';
        btn.addEventListener('click', renderMemoryModal);

        const info = document.createElement('a');
        info.href = '#';
        info.className = 'chat-mem-info';
        info.title = 'All memories stored locally in your browser. Nothing leaves your device except current message context.';
        info.textContent = 'ℹ';
        info.addEventListener('click', function (e) {
            e.preventDefault();
            alert('PRIVACY NOTICE\n\nAll JAE-AI memories are stored locally in your browser (localStorage). They never leave your device.\n\nPer message, only the current text plus a small set of relevant memories is sent as context to Venice AI to provide continuity.\n\nYou can view, export, or clear all memories via the 🧠 button.');
        });

        chatHeader.appendChild(info);
        chatHeader.appendChild(btn);

        updateMemCount();
    }

    function updateMemCount() {
        const el = document.getElementById('memBtnCount');
        if (el && mem) el.textContent = mem.getAll().length;
    }

    // ─── Event listeners ───
    chatSend.addEventListener('click', sendMessage);
    chatInput.addEventListener('keydown', function (e) {
        if (e.key === 'Enter' && !e.shiftKey) {
            e.preventDefault();
            sendMessage();
        }
    });

    // ─── Init ───
    injectMemoryUI();

    // Update memory count periodically
    setInterval(updateMemCount, 5000);

    const restored = restoreHistory();

    if (!restored) {
        // Auto-greeting after short delay (only if no history restored)
        setTimeout(function () {
            showTyping();
            setTimeout(function () {
                hideTyping();
                var greeting = 'Welcome to JAESWIFT.XYZ — I\'m JAE-AI, your onboard guide. Ask me anything about this system, or try saying "what can I explore here?"';
                history.push({ role: 'assistant', content: greeting });
                if (mem) mem.appendHistory({ role: 'assistant', content: greeting });
                var bodyEl = addMessage('assistant', '');
                typewriterEffect(bodyEl, greeting, 15);
            }, 1500);
        }, 2000);
    }

})();