/**
 * Shared UI primitives for AgentHub HTML pages.
 *
 * Constraints:
 *  - Dependency-free: only string/template helpers, no npm UI libs.
 *  - No emojis: inline SVG/CSS only.
 *  - Self-contained: pages import this and inline the returned CSS/JS.
 */

import { TaskStatus as TaskStatusSchema } from '../core/schema.js';
type TaskStatus = 'open' | 'in_progress' | 'review' | 'done' | 'cancelled';

/** CSS variables block matching the AgentHub dark design spec. */
export function designTokensCss(): string {
  return `
:root {
  --bg: #0F172A;
  --surface: #161B22;
  --raised: #1E293B;
  --border: #30363D;
  --text: #F8FAFC;
  --muted: #94A3B8;
  --accent: #58A6FF;
  --green: #22C55E;

  --status-open: #8B949E;
  --status-in_progress: #58A6FF;
  --status-review: #D29922;
  --status-done: #22C55E;
  --status-cancelled: #6E7681;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 var(--font-sans);
  padding: 16px 20px 32px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}
`;
}

const AGENT_PALETTE: Record<string, { color: string; initial: string }> = {
  claude: { color: '#D97757', initial: 'C' },
  codex: { color: '#10A37F', initial: 'Cx' },
  kimi: { color: '#7C3AED', initial: 'K' },
  'windows-claude': { color: '#2563EB', initial: 'W' },
  backyard: { color: '#64748B', initial: 'B' },
};

function hashString(str: string): number {
  let h = 0;
  for (let i = 0; i < str.length; i++) {
    h = (h << 5) - h + str.charCodeAt(i);
    h |= 0;
  }
  return Math.abs(h);
}

function deterministicColor(name: string): string {
  const colors = ['#DC2626', '#EA580C', '#D97706', '#65A30D', '#0891B2', '#2563EB', '#7C3AED', '#DB2777'];
  return colors[hashString(name) % colors.length];
}

export interface AgentAvatarOptions {
  /** Render an extra ring for the architect role. */
  architectRing?: boolean;
  size?: number;
}

/**
 * Render a round agent avatar chip with per-agent accent color and initials.
 * No external images, no emojis.
 */
export function agentAvatar(
  name: string | undefined,
  options: AgentAvatarOptions = {},
): string {
  const resolvedName = name?.toLowerCase() ?? '';
  const spec = AGENT_PALETTE[resolvedName] ?? {
    color: deterministicColor(resolvedName || 'unknown'),
    initial: (name ?? '?').slice(0, 1).toUpperCase(),
  };

  const { architectRing = false, size = 22 } = options;
  const fontSize = Math.round(size * 0.45);
  const ring = architectRing
    ? `box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px ${spec.color};`
    : '';

  return `<span class="agent-avatar" title="${escapeHtml(name ?? 'unknown')}" style="
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: ${size}px;
    height: ${size}px;
    border-radius: 50%;
    background: ${spec.color};
    color: #fff;
    font-family: var(--font-mono);
    font-size: ${fontSize}px;
    font-weight: 700;
    line-height: 1;
    flex: 0 0 auto;
    ${ring}
  ">${escapeHtml(spec.initial)}</span>`;
}

/**
 * Provider/company brand metadata + official Simple Icons SVG paths (verified,
 * 24x24 viewBox). Used to group + badge agents by the model behind them.
 */
const PROVIDERS: Record<string, { name: string; color: string; path: string }> = {
  anthropic: {
    name: 'Anthropic',
    color: '#D97757',
    path: 'M17.3041 3.541h-3.6718l6.696 16.918H24Zm-10.6082 0L0 20.459h3.7442l1.3693-3.5527h7.0052l1.3693 3.5528h3.7442L10.5363 3.5409Zm-.3712 10.2232 2.2914-5.9456 2.2914 5.9456Z',
  },
  openai: {
    name: 'OpenAI',
    color: '#10A37F',
    path: 'M22.2819 9.8211a5.9847 5.9847 0 0 0-.5157-4.9108 6.0462 6.0462 0 0 0-6.5098-2.9A6.0651 6.0651 0 0 0 4.9807 4.1818a5.9847 5.9847 0 0 0-3.9977 2.9 6.0462 6.0462 0 0 0 .7427 7.0966 5.98 5.98 0 0 0 .511 4.9107 6.051 6.051 0 0 0 6.5146 2.9001A5.9847 5.9847 0 0 0 13.2599 24a6.0557 6.0557 0 0 0 5.7718-4.2058 5.9894 5.9894 0 0 0 3.9977-2.9001 6.0557 6.0557 0 0 0-.7475-7.0729zm-9.022 12.6081a4.4755 4.4755 0 0 1-2.8764-1.0408l.1419-.0804 4.7783-2.7582a.7948.7948 0 0 0 .3927-.6813v-6.7369l2.02 1.1686a.071.071 0 0 1 .038.052v5.5826a4.504 4.504 0 0 1-4.4945 4.4944zm-9.6607-4.1254a4.4708 4.4708 0 0 1-.5346-3.0137l.142.0852 4.783 2.7582a.7712.7712 0 0 0 .7806 0l5.8428-3.3685v2.3324a.0804.0804 0 0 1-.0332.0615L9.74 19.9502a4.4992 4.4992 0 0 1-6.1408-1.6464zM2.3408 7.8956a4.485 4.485 0 0 1 2.3655-1.9728V11.6a.7664.7664 0 0 0 .3879.6765l5.8144 3.3543-2.0201 1.1685a.0757.0757 0 0 1-.071 0l-4.8303-2.7865A4.504 4.504 0 0 1 2.3408 7.872zm16.5963 3.8558L13.1038 8.364 15.1192 7.2a.0757.0757 0 0 1 .071 0l4.8303 2.7913a4.4944 4.4944 0 0 1-.6765 8.1042v-5.6772a.79.79 0 0 0-.407-.667zm2.0107-3.0231l-.142-.0852-4.7735-2.7818a.7759.7759 0 0 0-.7854 0L9.409 9.2297V6.8974a.0662.0662 0 0 1 .0284-.0615l4.8303-2.7866a4.4992 4.4992 0 0 1 6.6802 4.66zM8.3065 12.863l-2.02-1.1638a.0804.0804 0 0 1-.038-.0567V6.0742a4.4992 4.4992 0 0 1 7.3757-3.4537l-.142.0805L8.704 5.459a.7948.7948 0 0 0-.3927.6813zm1.0976-2.3654l2.602-1.4998 2.6069 1.4998v2.9994l-2.5974 1.4997-2.6067-1.4997Z',
  },
  moonshot: {
    name: 'Moonshot',
    color: '#7C3AED',
    path: 'm1.053 16.91 9.538 2.55a21 20.981 0 0 0 .06 2.031l5.956 1.592a12 11.99 0 0 1-15.554-6.172m-1.02-5.79 11.352 3.035a21 20.981 0 0 0-.469 2.01l10.817 2.89a12 11.99 0 0 1-1.845 2.004L.658 15.918a12 11.99 0 0 1-.625-4.796m1.593-5.146L13.573 9.17a21 20.981 0 0 0-1.01 1.874l11.297 3.02a21 20.981 0 0 1-.67 2.362l-11.55-3.087L.125 10.26a12 11.99 0 0 1 1.499-4.285ZM6.067 1.58l11.285 3.016a21 20.981 0 0 0-1.688 1.719l7.824 2.091a21 20.981 0 0 1 .513 2.664L2.107 5.218a12 11.99 0 0 1 3.96-3.638M21.68 4.866 7.222 1.003A12 11.99 0 0 1 21.68 4.866',
  },
};

/** Brand metadata for a provider kind, or null if unknown. */
export function providerMeta(kind?: string): { name: string; color: string } | null {
  if (!kind) return null;
  const p = PROVIDERS[kind];
  return p ? { name: p.name, color: p.color } : null;
}

/** Inline brand logo SVG for a provider kind, tinted with its brand color. */
export function providerLogo(kind: string | undefined, size = 20): string {
  const p = kind ? PROVIDERS[kind] : undefined;
  if (!p) return '';
  return `<svg width="${size}" height="${size}" viewBox="0 0 24 24" fill="${p.color}" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" style="flex:0 0 auto"><path d="${p.path}"/></svg>`;
}

/** Inline status pill for a task status. */
export function statusPill(status: TaskStatus): string {
  const labels: Record<TaskStatus, string> = {
    open: 'Open',
    in_progress: 'In Progress',
    review: 'Review',
    done: 'Done',
    cancelled: 'Cancelled',
  };
  const colorVar = `--status-${status}`;
  return `<span class="status-pill" data-status="${status}" style="
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(${colorVar});
    border: 1px solid var(${colorVar});
    background: transparent;
  "><span style="width:6px;height:6px;border-radius:50%;background:var(${colorVar});"></span>${escapeHtml(labels[status])}</span>`;
}

/**
 * CSS snippet that injects RGB versions of status colors so statusPill can use
 * rgba() backgrounds/borders. Include this once in the page <style>.
 */
export function statusRgbCss(): string {
  return `
.status-pill[data-status="open"]       { --status-rgb: 139, 148, 158; }
.status-pill[data-status="in_progress"] { --status-rgb: 88, 166, 255; }
.status-pill[data-status="review"]     { --status-rgb: 210, 153, 34; }
.status-pill[data-status="done"]       { --status-rgb: 34, 197, 94; }
.status-pill[data-status="cancelled"]  { --status-rgb: 110, 118, 129; }
`;
}

/** Escape HTML entities in a string. */
export function escapeHtml(raw: string): string {
  return raw
    .replace(/&/g, '&amp;')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&#39;');
}

/**
 * Client-side live timer snippet.
 *
 * Expects elements with `data-live-timer` and ISO timestamps in
 * `data-timer-at`. The optional `data-timer-mode` controls the label prefix:
 *   - open      -> "created"
 *   - in_progress -> "claimed"
 *   - review    -> "review"
 *   - done      -> "done"
 *
 * Updates every second.
 */
export function liveTimerJs(): string {
  return `
(function() {
  function formatAgo(iso) {
    var t = Date.parse(iso);
    if (isNaN(t)) return '';
    var s = Math.max(0, Math.floor((Date.now() - t) / 1000));
    if (s < 60) return s + 's';
    var m = Math.floor(s / 60);
    if (m < 60) return m + 'm';
    var h = Math.floor(m / 60);
    if (h < 24) return h + 'h';
    return Math.floor(h / 24) + 'd';
  }
  function update() {
    document.querySelectorAll('[data-live-timer]').forEach(function(el) {
      var at = el.getAttribute('data-timer-at');
      var mode = el.getAttribute('data-timer-mode') || 'open';
      var prefix = { open: 'created', in_progress: 'claimed', review: 'review', done: 'done', cancelled: 'cancelled' }[mode] || 'updated';
      el.textContent = prefix + ' ' + formatAgo(at) + ' ago';
    });
  }
  update();
  setInterval(update, 1000);
})();
`;
}

/** Common page header markup with AgentHub mark, project name and nav. */
export function pageHeader(projectName: string, current: 'board' | 'team'): string {
  const mark = `<svg width="18" height="18" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" style="flex:0 0 auto"><circle cx="12" cy="12" r="10" stroke="var(--accent)" stroke-width="2.5"/><circle cx="12" cy="12" r="4" fill="var(--accent)"/></svg>`;
  const navItem = (label: string, path: string, active: boolean) =>
    `<a href="${path}" style="
      text-decoration: none;
      color: ${active ? 'var(--text)' : 'var(--muted)'};
      font-weight: ${active ? '600' : '400'};
      padding: 4px 8px;
      border-radius: 6px;
      border: 1px solid ${active ? 'var(--border)' : 'transparent'};
      background: ${active ? 'var(--surface)' : 'transparent'};
    ">${label}</a>`;

  return `
<header style="
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
">
  ${mark}
  <h1 style="font-size:18px;margin:0;font-weight:600;">AgentHub</h1>
  <span style="color:var(--muted);font-size:12px;">${escapeHtml(projectName)}</span>
  <span style="flex:1;"></span>
  <nav style="display:flex;gap:8px;align-items:center;">
    ${navItem('Board', '/board', current === 'board')}
    ${navItem('Team', '/team', current === 'team')}
  </nav>
  <span id="conn-dot" style="width:8px;height:8px;border-radius:50%;background:var(--green);" title="connected"></span>
</header>`;
}