{% extends "base.html" %}
{% block title %}{% if page_title %}{{ page_title }}{% else %}Simulate Chat{% endif %} — ICDEV™ Dashboard{% endblock %}

{% block extra_css %}
<style>
/* ── Viewport fix: no body scroll, chat fills remaining height ────── */
body { overflow: hidden; height: 100vh; }
.main-content { padding: 0 !important; max-width: 100% !important; margin: 0 !important; display: flex; flex-direction: column; overflow: hidden; }
#sim-chat-page { flex: 1; min-height: 0; display: flex; flex-direction: column; overflow: hidden; padding: 0.75rem 1.5rem; max-width: 1200px; width: 100%; margin: 0 auto; box-sizing: border-box; }
/* ── Dark-theme-aware COA card styles ──────────────────────────────── */
.coa-card {
  border: 1px solid var(--border-color, #2a2a40);
  border-radius: 10px;
  padding: 1rem;
  margin-bottom: 0.85rem;
  background: var(--bg-card, #16213e);
  box-shadow: 0 1px 4px rgba(0,0,0,0.25);
  position: relative;
}
.coa-card--recommended {
  border-color: #4a90d9;
  background: rgba(74,144,217,0.08);
}
.coa-card__badge {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  border-radius: 12px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-right: 0.35rem;
}
.badge--strategy { background: rgba(40,167,69,0.2); color: #4ade80; }
.badge--effort-low { background: rgba(40,167,69,0.2); color: #4ade80; }
.badge--effort-medium { background: rgba(251,146,60,0.2); color: #fb923c; }
.badge--effort-high { background: rgba(220,53,69,0.2); color: #f87171; }
.badge--risk-low { background: rgba(40,167,69,0.2); color: #4ade80; }
.badge--risk-medium { background: rgba(251,146,60,0.2); color: #fb923c; }
.badge--risk-high { background: rgba(220,53,69,0.2); color: #f87171; }
.badge--recommended { background: #1976d2; color: #fff; }
.coa-card__title { font-weight: 700; font-size: 1rem; margin-bottom: 0.4rem; color: var(--text-primary, #e0e0e0); }
.coa-card__meta { margin-bottom: 0.6rem; font-size: 0.82rem; }
.coa-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin: 0.5rem 0; }
.coa-col__label { font-weight: 700; font-size: 0.78rem; text-transform: uppercase; color: var(--text-secondary, #a0a0b8); margin-bottom: 0.25rem; }
.coa-col--pros .coa-col__label { color: #4ade80; }
.coa-col--cons .coa-col__label { color: #f87171; }
.coa-col ul { margin: 0; padding-left: 1.1rem; font-size: 0.85rem; color: var(--text-primary, #e0e0e0); }
.coa-col--pros ul li::marker { color: #4ade80; }
.coa-col--cons ul li::marker { color: #f87171; }
.coa-card__tools { font-size: 0.82rem; color: var(--text-secondary, #a0a0b8); margin-top: 0.35rem; }
.coa-card__actions { margin-top: 0.65rem; display: flex; gap: 0.5rem; flex-wrap: wrap; }
.coa-btn {
  padding: 0.3rem 0.85rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
}
.coa-btn--primary { background: #1976d2; color: #fff; }
.coa-btn--secondary { background: var(--bg-secondary, #1a1a2e); color: var(--text-primary, #e0e0e0); border: 1px solid var(--border-color, #2a2a40); }
.coa-btn--ai { background: #7b1fa2; color: #fff; }
.dep-warning {
  background: rgba(230,81,0,0.15);
  border-left: 4px solid #fb923c;
  border-radius: 6px;
  padding: 0.65rem 1rem;
  margin-bottom: 0.75rem;
  font-size: 0.88rem;
  color: var(--text-primary, #e0e0e0);
}
.dep-warning--critical {
  background: rgba(198,40,40,0.15);
  border-color: #f87171;
}
.cam-welcome {
  background: linear-gradient(135deg, #1a237e 0%, #283593 60%, #3949ab 100%);
  color: #fff;
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}
.cam-welcome h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.cam-welcome p { margin: 0; font-size: 0.88rem; opacity: 0.9; }
.cam-commands { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.6rem; }
.cam-cmd-chip {
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  padding: 0.2rem 0.65rem;
  font-size: 0.78rem;
  cursor: pointer;
  color: #fff;
  font-family: monospace;
}
.cam-cmd-chip:hover { background: rgba(255,255,255,0.25); }

/* ── Chat window ─────────────────────────────────────────────────── */
.sim-chat-window {
  border: 1px solid var(--border-color, #2a2a40);
  border-radius: 8px;
  padding: 1rem;
  min-height: 120px;
  flex: 1;
  overflow-y: auto;
  background: var(--bg-card, #16213e);
  margin-bottom: 0.75rem;
}
.sim-input {
  flex: 1;
  padding: 0.65rem 1rem;
  border: 1px solid var(--border-color, #2a2a40);
  border-radius: 8px;
  font-size: 0.95rem;
  background: var(--bg-input, #0d1b2a);
  color: var(--text-primary, #e0e0e0);
}
.sim-input::placeholder { color: var(--text-muted, #6c6c80); }
.sim-input:focus { outline: none; border-color: var(--accent-blue, #4a90d9); }
.sim-sidebar {
  width: 220px;
  padding: 1rem;
  border: 1px solid var(--border-color, #2a2a40);
  border-radius: 8px;
  background: var(--bg-secondary, #1a1a2e);
  font-size: 0.85rem;
}
.sim-upload-panel {
  margin-bottom: 1.25rem;
  padding: 1rem;
  border: 2px dashed var(--border-light, #3a3a55);
  border-radius: 8px;
  background: var(--bg-secondary, #1a1a2e);
}
.sim-slash-bar {
  margin-bottom: 1rem;
  padding: 0.6rem 1rem;
  background: var(--bg-secondary, #1a1a2e);
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary, #a0a0b8);
  position: relative;
}
.sim-slash-dropdown {
  display: none;
  position: absolute;
  left: 0;
  top: 100%;
  z-index: 200;
  background: var(--bg-card, #16213e);
  border: 1px solid var(--border-color, #2a2a40);
  border-radius: 6px;
  min-width: 180px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}
.slash-cmd {
  cursor: pointer;
  color: var(--accent-blue-light, #6db3f8);
  text-decoration: underline dotted;
  font-family: monospace;
}

/* ── Canvas chips ────────────────────────────────────────────────── */
.canvas-chip {
  padding: 0.4rem 1rem;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.85rem;
  transition: box-shadow 0.15s;
}
.canvas-chip[data-canvas="cam"] { border: 2px solid #3949ab; background: rgba(57,73,171,0.25); color: #a5b4fc; }
.canvas-chip[data-canvas="ndc"] { border: 2px solid #1976d2; background: rgba(25,118,210,0.25); color: #60a5fa; }
.canvas-chip[data-canvas="sdc"] { border: 2px solid #e53935; background: rgba(229,57,53,0.25); color: #f87171; }
.canvas-chip[data-canvas="eda"] { border: 2px solid #388e3c; background: rgba(56,142,60,0.25); color: #34d399; }
.canvas-chip[data-canvas="ddc"] { border: 2px solid #f57c00; background: rgba(245,124,0,0.25); color: #fb923c; }

@media (max-width: 640px) {
  .sim-chat-layout { flex-direction: column !important; }
  .sim-sidebar { width: 100% !important; }
  .coa-cols { grid-template-columns: 1fr !important; }
}
</style>
{% endblock %}

{% block content %}
<div id="sim-chat-page">
<div class="container" style="max-width:100%;flex:1;display:flex;flex-direction:column;overflow:hidden;padding:0;">
  <!-- Breadcrumb -->
  <nav aria-label="breadcrumb" style="margin-bottom:0.5rem;">
    <span><a href="/">Home</a></span>
    <span style="color:var(--text-muted);"> &gt; </span>
    <span><a href="/simulation">Simulation</a></span>
    <span style="color:var(--text-muted);"> &gt; </span>
    <span style="color:var(--text-secondary);">{% if page_title %}{{ page_title }}{% else %}Chat{% endif %}</span>
  </nav>

  <h1 style="margin-bottom:0.25rem;">{% if page_title %}{{ page_title }}{% else %}Simulation Chat{% endif %}</h1>
  <p class="text-muted" style="margin-bottom:1.5rem;">
    {% if canvas_type == 'cam' %}
      Migration Intelligence Workspace — COA analysis, deprecated code detection, refactor dispatch, and cross-canvas navigation.
    {% else %}
      Conversational Digital Program Twin — EXPLAIN, TROUBLESHOOT, REFINE across canvas types.
    {% endif %}
  </p>

  <!-- Canvas Type Selector -->
  <div style="margin-bottom:1.25rem;">
    <label style="font-weight:600;display:block;margin-bottom:0.5rem;color:var(--text-primary);">Canvas Type</label>
    <div class="canvas-selector" style="display:flex;gap:0.5rem;flex-wrap:wrap;">
      <button class="canvas-chip" data-canvas-type="cam" data-canvas="cam" onclick="selectCanvas('cam')">CAM</button>
      <button class="canvas-chip" data-canvas-type="ndc" data-canvas="ndc" onclick="selectCanvas('ndc')">NDC</button>
      <button class="canvas-chip" data-canvas-type="sdc" data-canvas="sdc" onclick="selectCanvas('sdc')">SDC</button>
      <button class="canvas-chip" data-canvas-type="eda" data-canvas="eda" onclick="selectCanvas('eda')">EDA</button>
      <button class="canvas-chip" data-canvas-type="ddc" data-canvas="ddc" onclick="selectCanvas('ddc')">DDC</button>
    </div>
    <input type="hidden" id="active-canvas-type" value="{{ canvas_type|default('ndc') }}" />
  </div>

  <!-- Slash-command autocomplete hints (context-sensitive, canvas-filtered) -->
  <div class="sim-slash-bar">
    <span id="slash-hint-text">
      <strong>NDC commands:</strong>
      <span class="slash-cmd">/explain</span> &bull;
      <span class="slash-cmd">/troubleshoot</span> &bull;
      <span class="slash-cmd">/refine</span> &bull;
      <span class="slash-cmd">/audit</span> &bull;
      <span class="slash-cmd">/ppsm</span> &bull;
      <span class="slash-cmd">/dfd</span> &bull;
      <span class="slash-cmd">/cis</span> &bull;
      <span class="slash-cmd">/isa</span> &bull;
      <span class="slash-cmd">/poam</span> &bull;
      <span class="slash-cmd">/oscal</span> &bull;
      <span class="slash-cmd">/bundle</span> &bull;
      <span class="slash-cmd">/diff</span> &bull;
      <span class="slash-cmd">/spec</span>
    </span>
    <div id="slash-dropdown" class="sim-slash-dropdown"></div>
  </div>

  <!-- Upload Panel -->
  <div class="sim-upload-panel">
    <label style="font-weight:600;display:block;margin-bottom:0.5rem;color:var(--text-primary);">Upload Diagram / Document</label>
    <p style="font-size:0.85rem;color:var(--text-muted);margin:0 0 0.75rem;">Drag and drop or browse to upload architecture diagrams, PDFs, or design files.</p>
    <input type="file" id="sim-upload" name="file"
           accept=".png,.jpg,.jpeg,.pdf,.drawio,.xml,.vsdx,image/png,image/jpeg,application/pdf"
           style="margin-bottom:0.5rem;" />
    <div style="font-size:0.78rem;color:var(--text-muted);">Accepted: PNG, JPG, PDF, draw.io, XML, VSDX</div>
  </div>

  <!-- CAM Welcome Panel (shown only for cam canvas) -->
  <div id="cam-welcome" style="display:none;">
    <div class="cam-welcome">
      <h3>Migration Intelligence Workspace</h3>
      <p>AI-powered migration path advisor. Ask about any technology, check deprecation status, generate Courses of Action with pros/cons, dispatch code refactoring jobs, and navigate to DDC/IDC/NDC canvases — all from one place.</p>
      <div class="cam-commands">
        <span class="cam-cmd-chip" onclick="insertCommand('/coa oracle')">/coa oracle</span>
        <span class="cam-cmd-chip" onclick="insertCommand('/deprecated elasticsearch7')">/deprecated elasticsearch7</span>
        <span class="cam-cmd-chip" onclick="insertCommand('/refactor ')">/refactor &lt;component&gt;</span>
        <span class="cam-cmd-chip" onclick="insertCommand('/status')">/status</span>
        <span class="cam-cmd-chip" onclick="insertCommand('/components')">/components</span>
        <span class="cam-cmd-chip" onclick="insertCommand('/analyze ')">/analyze &lt;code&gt;</span>
      </div>
    </div>
  </div>

  <!-- Chat Window -->
  <div class="sim-chat-layout" style="display:flex;gap:1.25rem;flex:1;min-height:0;">
    <!-- Messages -->
    <div style="flex:1;min-width:0;display:flex;flex-direction:column;min-height:0;">
      <div id="chat-messages" class="sim-chat-window">
        <div class="mermaid-diagram" id="mermaid-output" style="margin-bottom:0.5rem;"></div>
        <div id="chat-placeholder" style="color:var(--text-muted);font-style:italic;font-size:0.9rem;">Session ready. Select a canvas type and start chatting.</div>
      </div>

      <!-- Input -->
      <div style="display:flex;gap:0.5rem;">
        <input id="chat-input" type="text" placeholder='/explain — describe your architecture'
               class="sim-input"
               onkeydown="if(event.key==='Enter'){hideSlashDropdown();sendMessage();} else if(event.key==='Escape')hideSlashDropdown();"
               oninput="_updateSlashDropdown(this.value.trim())"
               onblur="setTimeout(hideSlashDropdown,150)" />
        <button onclick="sendMessage()"
                style="padding:0.65rem 1.2rem;background:#1976d2;color:#fff;border:none;border-radius:8px;cursor:pointer;font-weight:600;">
          Send
        </button>
      </div>
      <div id="chat-status" style="font-size:0.82rem;color:var(--text-muted);margin-top:0.4rem;"></div>
    </div>

    <!-- Session info sidebar -->
    <div class="sim-sidebar">
      <strong style="color:var(--text-primary);">Session</strong>
      <div style="margin-top:0.5rem;word-break:break-all;color:var(--text-secondary);" id="session-info">No active session</div>
      <div style="margin-top:1rem;">
        <button onclick="startSession()"
                style="width:100%;padding:0.5rem;background:#388e3c;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:0.85rem;">
          Start Session
        </button>
      </div>
      <div id="bundle-section" style="display:none;margin-top:0.75rem;">
        <button onclick="downloadBundle()"
                style="width:100%;padding:0.5rem;background:#f57c00;color:#fff;border:none;border-radius:6px;cursor:pointer;font-size:0.85rem;">
          Download Bundle
        </button>
        <div id="bundle-link" style="margin-top:0.4rem;font-size:0.78rem;"></div>
      </div>
    </div>
  </div>
</div>
</div>

<script>
var _sessionId = null;
var _canvasType = 'ndc';
var _canvasCmds = {};

// ---------------------------------------------------------------------------
// COA Card renderer
// ---------------------------------------------------------------------------
function _effortBadgeClass(effort) {
  return {'low':'badge--effort-low','medium':'badge--effort-medium','high':'badge--effort-high'}[effort] || 'badge--effort-low';
}
function _riskBadgeClass(risk) {
  return {'low':'badge--risk-low','medium':'badge--risk-medium','high':'badge--risk-high'}[risk] || 'badge--risk-low';
}
function _esc(s) { return String(s||'').replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;'); }

function renderCOACards(coas, techName) {
  if (!coas || !coas.length) return '';
  var html = '<div style="margin-top:0.5rem;">';
  coas.forEach(function(coa) {
    var isRec = coa.recommended;
    html += '<div class="coa-card' + (isRec ? ' coa-card--recommended' : '') + '">';
    if (isRec) {
      html += '<span class="coa-card__badge badge--recommended">Recommended</span>';
    }
    html += '<div class="coa-card__title">' + _esc(coa.title) + '</div>';
    html += '<div class="coa-card__meta">';
    html += '<span class="coa-card__badge badge--strategy">' + _esc(coa.strategy_label || coa.strategy) + '</span>';
    html += '<span class="coa-card__badge ' + _effortBadgeClass(coa.effort) + '">' + _esc(coa.effort_days) + 'd</span>';
    html += '<span class="coa-card__badge ' + _riskBadgeClass(coa.risk) + '">Risk: ' + _esc(coa.risk_label || coa.risk) + '</span>';
    if (coa.timeline_weeks) {
      html += '<span style="font-size:0.78rem;color:var(--text-muted);margin-left:0.3rem;">~' + _esc(coa.timeline_weeks) + ' weeks</span>';
    }
    html += '</div>';
    if (isRec && coa.recommended_reason) {
      html += '<div style="font-size:0.83rem;color:#60a5fa;margin-bottom:0.5rem;font-style:italic;">' + _esc(coa.recommended_reason) + '</div>';
    }
    var pros = coa.pros || [];
    var cons = coa.cons || [];
    if (pros.length || cons.length) {
      html += '<div class="coa-cols">';
      html += '<div class="coa-col coa-col--pros"><div class="coa-col__label">Pros</div><ul>';
      pros.slice(0,5).forEach(function(p) { html += '<li>' + _esc(p) + '</li>'; });
      html += '</ul></div>';
      html += '<div class="coa-col coa-col--cons"><div class="coa-col__label">Cons</div><ul>';
      cons.slice(0,5).forEach(function(c) { html += '<li>' + _esc(c) + '</li>'; });
      html += '</ul></div>';
      html += '</div>';
    }
    var tools = coa.tools || [];
    if (tools.length) {
      html += '<div class="coa-card__tools"><strong>Tools:</strong> ';
      html += tools.map(function(t){ return '<code style="background:rgba(255,255,255,0.08);padding:0.1rem 0.3rem;border-radius:3px;color:var(--accent-blue-light);">' + _esc(t) + '</code>'; }).join(' ');
      html += '</div>';
    }
    var aiOpps = coa.ai_opportunities || [];
    if (aiOpps.length) {
      html += '<div style="margin-top:0.4rem;font-size:0.82rem;"><strong style="color:#c084fc;">AI Opportunities:</strong> ';
      html += aiOpps.map(function(o){ return '<span style="color:#c084fc;">' + _esc(o.title || o.id) + '</span>'; }).join(', ');
      html += '</div>';
    }
    html += '<div class="coa-card__actions">';
    if (coa.canvas_hints) {
      if (coa.canvas_hints.mc) {
        html += '<a href="/migration-canvas/projects" target="_blank" class="coa-btn coa-btn--primary">Migration Canvas</a>';
      }
      if (coa.canvas_hints.ddc) {
        html += '<a href="/data/canvas" target="_blank" class="coa-btn coa-btn--secondary">DDC</a>';
      }
      if (coa.canvas_hints.idc) {
        html += '<a href="/infra/canvas" target="_blank" class="coa-btn coa-btn--secondary">IDC</a>';
      }
      if (coa.canvas_hints.ndc) {
        html += '<a href="/network/topologies" target="_blank" class="coa-btn coa-btn--secondary">NDC</a>';
      }
    }
    if (aiOpps.length) {
      html += '<button onclick="insertCommand(\'/refactor ' + _esc(techName||'') + '\')" class="coa-btn coa-btn--ai">Dispatch Refactor Jobs</button>';
    }
    html += '</div></div>';
  });
  html += '</div>';
  return html;
}

function renderDepWarning(dep) {
  if (!dep || dep.status === 'active' || dep.status === 'unknown') return '';
  var isCrit = dep.severity === 'critical' || dep.severity === 'high';
  var icon = isCrit ? '🔴' : '🟡';
  return (
    '<div class="dep-warning' + (isCrit ? ' dep-warning--critical' : '') + '">' +
    icon + ' <strong>' + _esc(dep.tech) + ' ' + (dep.eol_date ? '(EOL: ' + _esc(dep.eol_date) + ')' : 'AT RISK') + '</strong>' +
    (dep.successor ? ' — Successor: <strong>' + _esc(dep.successor) + '</strong>' : '') +
    '</div>'
  );
}

function _appendMessage(role, content, extraHtml) {
  var placeholder = document.getElementById('chat-placeholder');
  if (placeholder) { placeholder.style.display = 'none'; }
  var msgs = document.getElementById('chat-messages');
  var el = document.createElement('div');
  el.style.marginBottom = '0.85rem';
  if (role === 'user') {
    el.innerHTML = '<div style="text-align:right;"><span style="display:inline-block;background:#1976d2;color:#fff;border-radius:12px 12px 2px 12px;padding:0.45rem 0.9rem;max-width:70%;font-size:0.93rem;">' + _esc(content) + '</span></div>';
  } else {
    var mdHtml = _renderMarkdown(content);
    el.innerHTML = '<div style="display:flex;gap:0.5rem;"><span style="font-size:1.1rem;flex-shrink:0;">🤖</span><div style="flex:1;background:var(--bg-secondary, #1a1a2e);border-radius:2px 12px 12px 12px;padding:0.5rem 0.9rem;font-size:0.92rem;color:var(--text-primary);">' + mdHtml + '</div></div>';
    if (extraHtml) { el.innerHTML += extraHtml; }
  }
  msgs.appendChild(el);
  msgs.scrollTop = msgs.scrollHeight;
}

function _renderMarkdown(text) {
  var s = _esc(text);
  s = s.replace(/```[\w]*\n([\s\S]*?)```/g, function(m, code){ return '<pre style="background:var(--bg-secondary);border-radius:4px;padding:0.5rem;overflow-x:auto;font-size:0.82rem;color:var(--text-primary);border:1px solid var(--border-color);">' + code + '</pre>'; });
  s = s.replace(/`([^`]+)`/g, '<code style="background:rgba(255,255,255,0.08);padding:0.1rem 0.3rem;border-radius:3px;font-size:0.88em;color:var(--accent-blue-light);">$1</code>');
  s = s.replace(/\*\*([^*]+)\*\*/g, '<strong>$1</strong>');
  s = s.replace(/^### (.+)$/gm, '<h4 style="margin:0.5rem 0 0.25rem;color:var(--text-primary);">$1</h4>');
  s = s.replace(/^## (.+)$/gm, '<h3 style="margin:0.5rem 0 0.25rem;color:var(--text-primary);">$1</h3>');
  s = s.replace(/^# (.+)$/gm, '<h2 style="margin:0.5rem 0 0.25rem;color:var(--text-primary);">$1</h2>');
  s = s.replace(/^---$/gm, '<hr style="border:none;border-top:1px solid var(--border-color);margin:0.5rem 0;">');
  s = s.replace(/^&gt; (.+)$/gm, '<blockquote style="border-left:3px solid var(--accent-blue);margin:0.25rem 0;padding:0.25rem 0.75rem;color:var(--text-secondary);">$1</blockquote>');
  s = s.replace(/\[([^\]]+)\]\(([^)]+)\)/g, '<a href="$2" style="color:var(--accent-blue-light);">$1</a>');
  s = s.replace(/^  [\-\*] (.+)$/gm, '<li style="margin-left:1.5rem;color:var(--text-primary);">$1</li>');
  s = s.replace(/^[\-\*] (.+)$/gm, '<li style="color:var(--text-primary);">$1</li>');
  s = s.replace(/\+ (.+)/g, '<li style="color:#4ade80;">$1</li>');
  s = s.replace(/\- (.+)/g, '<li style="color:#f87171;">$1</li>');
  s = s.replace(/\|(.+)\|/g, function(m) {
    var cells = m.split('|').filter(function(c){ return c.trim(); });
    if (cells[0] && cells[0].trim().match(/^[-:]+$/)) return '';
    var tdHtml = cells.map(function(c){ return '<td style="padding:0.2rem 0.6rem;border:1px solid var(--border-color);color:var(--text-primary);">' + c.trim() + '</td>'; }).join('');
    return '<tr>' + tdHtml + '</tr>';
  });
  s = s.replace(/<tr>/g, function(m, offset, str) {
    var before = str.slice(Math.max(0, offset-10), offset);
    return before.includes('<table') ? m : '<table style="border-collapse:collapse;width:100%;font-size:0.85rem;margin:0.5rem 0;"><tr>';
  });
  if (s.includes('</tr>') && !s.includes('</table>')) s += '</table>';
  s = s.replace(/\n\n/g, '<br><br>').replace(/\n/g, '<br>');
  return s;
}

function _fetchCanvasCommands(ct) {
  if (_canvasCmds[ct]) { _renderSlashHints(ct, _canvasCmds[ct]); return; }
  fetch('/api/simulate/slash-commands?canvas_type=' + ct)
    .then(function(r) { return r.json(); })
    .then(function(d) {
      _canvasCmds[ct] = d.commands || [];
      _renderSlashHints(ct, _canvasCmds[ct]);
    })
    .catch(function() {
      var fallback = {
        ndc: ['/explain', '/troubleshoot', '/refine', '/audit', '/ppsm', '/dfd', '/cis', '/isa', '/poam', '/oscal', '/bundle', '/diff', '/spec'],
        sdc: ['/explain', '/troubleshoot', '/audit', '/api-surface', '/dfd', '/cis', '/isa', '/poam', '/oscal', '/bundle', '/diff', '/spec'],
        eda: ['/explain', '/troubleshoot', '/refine', '/audit', '/event-catalog', '/dfd', '/cis', '/isa', '/poam', '/oscal', '/bundle', '/diff', '/spec'],
        cam: ['/coa', '/deprecated', '/refactor', '/status', '/analyze', '/components'],
      };
      _canvasCmds[ct] = fallback[ct] || fallback['ndc'];
      _renderSlashHints(ct, _canvasCmds[ct]);
    });
}

function _renderSlashHints(ct, cmds) {
  var displayName = ct.toUpperCase();
  var parts = ['<strong>' + displayName + ' commands:</strong>'];
  cmds.forEach(function(cmd) {
    parts.push('<span class="slash-cmd" onclick="insertCommand(\'' + cmd + '\')">' + cmd + '</span>');
  });
  document.getElementById('slash-hint-text').innerHTML = parts.join(' &bull; ');
}

function insertCommand(cmd) {
  var input = document.getElementById('chat-input');
  input.value = cmd + ' ';
  input.focus();
  hideSlashDropdown();
}

function _updateSlashDropdown(val) {
  var dropdown = document.getElementById('slash-dropdown');
  if (!val.startsWith('/')) { hideSlashDropdown(); return; }
  var cmds = _canvasCmds[_canvasType] || [];
  var matches = cmds.filter(function(c) { return c.startsWith(val.toLowerCase()); });
  if (!matches.length) { hideSlashDropdown(); return; }
  dropdown.innerHTML = matches.map(function(c) {
    return '<div class="slash-drop-item" onclick="insertCommand(\'' + c + '\')" '
      + 'style="padding:0.4rem 1rem;cursor:pointer;font-size:0.85rem;color:var(--text-primary);" '
      + 'onmouseover="this.style.background=\'rgba(74,144,217,0.2)\'" '
      + 'onmouseout="this.style.background=\'\'"><code>' + c + '</code></div>';
  }).join('');
  dropdown.style.display = 'block';
}

function hideSlashDropdown() {
  document.getElementById('slash-dropdown').style.display = 'none';
}

function selectCanvas(ct) {
  _canvasType = ct;
  document.getElementById('active-canvas-type').value = ct;
  document.querySelectorAll('.canvas-chip').forEach(function(el) {
    el.style.fontWeight = el.dataset.canvasType === ct ? '800' : '600';
    el.style.boxShadow = el.dataset.canvasType === ct ? '0 0 0 3px rgba(74,144,217,0.45)' : '';
  });
  _fetchCanvasCommands(ct);
  var camWelcome = document.getElementById('cam-welcome');
  if (camWelcome) camWelcome.style.display = ct === 'cam' ? 'block' : 'none';
  var inp = document.getElementById('chat-input');
  if (inp) {
    inp.placeholder = ct === 'cam'
      ? '/coa oracle  |  /deprecated elasticsearch  |  /status  |  Ask anything about migration'
      : '/explain — describe your architecture';
  }
  if (ct === 'cam' && !_sessionId) startSession();
}

function startSession() {
  var ct = _canvasType;
  fetch('/api/simulate/session', {
    method: 'POST',
    headers: {'Content-Type': 'application/json'},
    body: JSON.stringify({canvas_type: ct})
  }).then(function(r) { return r.json(); }).then(function(d) {
    _sessionId = d.session_id || d.id;
    document.getElementById('session-info').textContent = 'ID: ' + (_sessionId || 'unknown') + '\nCanvas: ' + ct.toUpperCase();
    if (ct !== 'cam') document.getElementById('bundle-section').style.display = 'block';
    document.getElementById('chat-status').textContent = 'Session started (' + ct.toUpperCase() + ')';
  }).catch(function(e) {
    document.getElementById('chat-status').textContent = 'Error: ' + e;
  });
}

function sendMessage() {
  var content = document.getElementById('chat-input').value.trim();
  if (!content) return;
  if (!_sessionId) {
    startSession();
    setTimeout(function(){ if (_sessionId) sendMessage(); }, 800);
    return;
  }
  _appendMessage('user', content);
  document.getElementById('chat-input').value = '';
  document.getElementById('chat-status').textContent = 'Thinking...';

  fetch('/api/simulate/message', {
    method: 'POST',
    headers: {'Content-Type': 'application/json'},
    body: JSON.stringify({session_id: _sessionId, content: content, canvas_type: _canvasType})
  }).then(function(r) { return r.json(); }).then(function(d) {
    var reply = d.reply || d.content || d.message || JSON.stringify(d);
    document.getElementById('chat-status').textContent = '';

    if (_canvasType === 'cam') {
      var extraHtml = '';
      var displayReply = reply;
      if (d.deprecation && d.deprecation.status && d.deprecation.status !== 'unknown') {
        extraHtml += renderDepWarning(d.deprecation);
      }
      if (d.coa_cards && d.coa_cards.length) {
        extraHtml += renderCOACards(d.coa_cards, d.tech || '');
        var headerEnd = reply.indexOf('\n### COA');
        displayReply = headerEnd > 0 ? reply.slice(0, headerEnd).trim() : '';
      }
      _appendMessage('assistant', displayReply, extraHtml);
    } else {
      _appendMessage('assistant', reply);
      var mermaidMatch = reply.match(/```mermaid\n([\s\S]*?)```/);
      if (mermaidMatch) {
        var out = document.getElementById('mermaid-output');
        out.innerHTML = '<div class="mermaid">' + mermaidMatch[1] + '</div>';
        if (window.mermaid) { mermaid.init(undefined, out.querySelectorAll('.mermaid')); }
      }
    }
  }).catch(function(e) {
    document.getElementById('chat-status').textContent = 'Error: ' + e;
    _appendMessage('assistant', '[Error] ' + e);
  });
}

function downloadBundle() {
  if (!_sessionId) return;
  fetch('/api/simulate/bundle', {
    method: 'POST',
    headers: {'Content-Type': 'application/json'},
    body: JSON.stringify({session_id: _sessionId})
  }).then(function(r) { return r.json(); }).then(function(d) {
    var url = d.download_url || d.url || d.link || d.file_url;
    if (url) {
      document.getElementById('bundle-link').innerHTML = '<a href="' + url + '">Download bundle</a>';
    }
  });
}

document.addEventListener('DOMContentLoaded', function() {
  var presel = document.getElementById('active-canvas-type').value || 'ndc';
  _canvasType = presel;
  selectCanvas(presel);
  if (presel !== 'cam') {
    var camLink = document.createElement('div');
    camLink.style.cssText = 'margin-top:0.5rem;font-size:0.82rem;color:var(--text-secondary);';
    camLink.innerHTML = '💡 For migration intelligence, switch to <strong>CAM</strong> canvas above or go to <a href="/simulate/chat?canvas=cam">Migration Chat</a>';
    var selector = document.querySelector('.canvas-selector');
    if (selector && selector.parentNode) selector.parentNode.appendChild(camLink);
  }
});
</script>
{% endblock %}