{% extends "base.html" %}

{% block title %}Web Terminal{% endblock %}

{% block extra_css %}
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/xterm@5.3.0/css/xterm.css">
<style>
.term-shell { display: grid; grid-template-rows: auto 1fr auto; height: 80vh; border:1px solid var(--theme-primary); }
.term-config { padding:8px; background:var(--theme-bg-dark); display:flex; gap:6px; flex-wrap:wrap; align-items:flex-end; }
.term-config input, .term-config button { font-size:0.85rem; }
#xterm { background:#000; padding:4px; overflow:hidden; }
#xterm .xterm { height:100%; }
.term-status { padding:4px 8px; background:var(--theme-bg-dark); font-size:0.8rem; color:#aaa; border-top:1px solid #333; }
</style>
{% endblock %}

{% block content %}
<div class="bbs-header">
    <h1><i class="bi bi-terminal-fill"></i> Web Terminal</h1>
    <p>Telnet any BBS right in your browser (optionally TLS-wrapped via the
       SSL checkbox below). Defaults to this BBS's telnet port. CP437
       box-drawing renders via xterm.js with high-bit byte passthrough.</p>
</div>

<div class="term-shell">
    <div class="term-config">
        <div>
            <label class="form-label mb-0" style="font-size:0.75rem;">Host</label>
            <input id="cfg_host" type="text" class="form-control form-control-sm"
                   value="{{ default_host }}" style="width:200px;">
        </div>
        <div>
            <label class="form-label mb-0" style="font-size:0.75rem;">Port</label>
            <input id="cfg_port" type="number" class="form-control form-control-sm"
                   value="{{ default_port }}" style="width:90px;">
        </div>
        <div class="form-check mb-1">
            <input id="cfg_ssl" class="form-check-input" type="checkbox">
            <label for="cfg_ssl" class="form-check-label" style="font-size:0.85rem;">SSL</label>
        </div>
        <button id="btnConnect" class="btn btn-success btn-sm">
            <i class="bi bi-plug"></i> Connect
        </button>
        <button id="btnDisconnect" class="btn btn-danger btn-sm" disabled>
            <i class="bi bi-x-circle"></i> Disconnect
        </button>
        <span class="ms-auto small text-muted">
            Quick:
            <a href="#" data-quick="bbs.a-net.online:1337">a-net</a>
        </span>
    </div>
    <div id="xterm"></div>
    <div class="term-status">
        <span id="status">disconnected</span>
        <span class="ms-3">Local echo: <input type="checkbox" id="local_echo"></span>
    </div>
</div>

<script src="https://cdn.jsdelivr.net/npm/xterm@5.3.0/lib/xterm.js"></script>
<script src="https://cdn.jsdelivr.net/npm/xterm-addon-fit@0.8.0/lib/xterm-addon-fit.js"></script>
<script src="https://cdn.socket.io/4.7.5/socket.io.min.js"></script>
<script>
(function() {
    const term = new Terminal({
        cursorBlink: true,
        fontFamily: '"Cascadia Mono","Consolas","Courier New",monospace',
        fontSize: 14,
        cols: 80, rows: 25,
        // Full 16-color CGA palette. Without this xterm.js falls back to
        // its gnome-ish default where "black" (ANSI 40) is #2e3436 — so
        // the negative space inside DROID MATRIX-style block ANSI art
        // reads as gray instead of solid black.
        theme: {
            background: '#000000',
            foreground: '#aaaaaa',
            cursor:     '#00ff00',
            cursorAccent: '#000000',
            selectionBackground: 'rgba(0,255,0,0.2)',
            black:        '#000000', red:          '#aa0000',
            green:        '#00aa00', yellow:       '#aa5500',
            blue:         '#0000aa', magenta:      '#aa00aa',
            cyan:         '#00aaaa', white:        '#aaaaaa',
            brightBlack:  '#555555', brightRed:    '#ff5555',
            brightGreen:  '#55ff55', brightYellow: '#ffff55',
            brightBlue:   '#5555ff', brightMagenta:'#ff55ff',
            brightCyan:   '#55ffff', brightWhite:  '#ffffff',
        },
    });
    const fit = new FitAddon.FitAddon();
    term.loadAddon(fit);
    term.open(document.getElementById('xterm'));
    setTimeout(() => fit.fit(), 100);
    window.addEventListener('resize', () => fit.fit());

    const status = document.getElementById('status');
    const sock = io('/term', {
        transports: ['websocket', 'polling'],
        reconnection: true,
    });
    let connected = false;

    sock.on('connect', () => { status.textContent = 'socketio connected'; });
    sock.on('disconnect', () => { status.textContent = 'socketio disconnected'; });
    sock.on('term_connected', d => {
        connected = true;
        status.textContent = `connected to ${d.host}:${d.port}` + (d.use_ssl ? ' (SSL)' : '');
        document.getElementById('btnConnect').disabled = true;
        document.getElementById('btnDisconnect').disabled = false;
        term.focus();
    });
    sock.on('term_disconnected', () => {
        connected = false;
        status.textContent = 'disconnected';
        document.getElementById('btnConnect').disabled = false;
        document.getElementById('btnDisconnect').disabled = true;
        term.write('\r\n[disconnected]\r\n');
    });
    sock.on('term_error', d => {
        term.write(`\r\n[error: ${d.message}]\r\n`);
    });
    sock.on('term_output', d => {
        // Server sent latin-1-decoded string; xterm.js writes raw codepoints.
        term.write(d.data);
    });

    document.getElementById('btnConnect').addEventListener('click', () => {
        const host = document.getElementById('cfg_host').value.trim();
        const port = parseInt(document.getElementById('cfg_port').value, 10) || 23;
        const ssl = document.getElementById('cfg_ssl').checked;
        sock.emit('term_open', { host, port, use_ssl: ssl });
    });
    document.getElementById('btnDisconnect').addEventListener('click', () => {
        sock.emit('term_close');
    });
    document.querySelectorAll('[data-quick]').forEach(el => {
        el.addEventListener('click', e => {
            e.preventDefault();
            const [h, p] = el.dataset.quick.split(':');
            document.getElementById('cfg_host').value = h;
            document.getElementById('cfg_port').value = p;
            document.getElementById('cfg_ssl').checked = false;
        });
    });

    // Keystroke pump → server
    term.onData(data => {
        if (!connected) return;
        if (document.getElementById('local_echo').checked) term.write(data);
        sock.emit('term_input', { data });
    });
})();
</script>
{% endblock %}