// Shared client helpers: auth bootstrap, fetch wrapper, DOM utils, SVG icons.

const ICONS = {
  tree: '<path d="M4 5h14M9 11h9M9 17h9M4 5v9.5a2.5 2.5 0 0 0 2.5 2.5H6"/>',
  key: '<circle cx="7.5" cy="14.5" r="3.5"/><path d="M10 12l8-8M14.5 4.5l3 3M12 7l2.5 2.5"/>',
  todo: '<rect x="4" y="4" width="6" height="6" rx="1.5"/><path d="M5.2 7l1.3 1.3L8.8 6"/><path d="M13 6.5h6M13 11h6M13 15.5h6"/><rect x="4" y="12.5" width="6" height="6" rx="1.5"/>',
  table: '<rect x="3.5" y="4.5" width="15" height="13" rx="1.5"/><path d="M3.5 9h15M3.5 13.5h15M8.5 4.5v13M13.5 4.5v13"/>',
  eye: '<path d="M2.5 11s3.2-5.5 8.5-5.5 8.5 5.5 8.5 5.5-3.2 5.5-8.5 5.5S2.5 11 2.5 11z"/><circle cx="11" cy="11" r="2.4"/>',
  eyeoff: '<path d="M4 4l14 14M9 5.8A8.7 8.7 0 0 1 11 5.5c5.3 0 8.5 5.5 8.5 5.5a15 15 0 0 1-2.7 3.2M6 7.5A14 14 0 0 0 2.5 11S5.7 16.5 11 16.5a8.6 8.6 0 0 0 3-.5"/>',
  back: '<path d="M15 4l-7 7 7 7"/>',
  comment: '<path d="M19 12.5a6.5 6.5 0 0 1-6.5 6.5H5l-1.8 1.8V12.5a7.3 7.3 0 0 1 7.3-7.3h1.5A6.5 6.5 0 0 1 19 12.5z"/>',
  edit: '<path d="M14.5 4.5l3 3L8 17l-4 1 1-4 9.5-9.5z"/>',
  image: '<rect x="3.5" y="4.5" width="15" height="13" rx="2"/><circle cx="8" cy="9" r="1.4"/><path d="M18 14l-4-4-7 7"/>',
  link: '<path d="M9 12.5a3.5 3.5 0 0 0 5 0l3-3a3.5 3.5 0 0 0-5-5l-1.2 1.2"/><path d="M13 9.5a3.5 3.5 0 0 0-5 0l-3 3a3.5 3.5 0 0 0 5 5l1.2-1.2"/>',
  copy: '<rect x="8" y="8" width="10" height="11" rx="2"/><path d="M5.5 14.5H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h7.5a2 2 0 0 1 2 2v.5"/>',
  check: '<path d="M4.5 11.5l4.5 4.5 8.5-9.5"/>',
  x: '<path d="M6 6l10 10M16 6L6 16"/>',
  reply: '<path d="M18 5v4a4 4 0 0 1-4 4H5"/><path d="M8.5 9.5L5 13l3.5 3.5"/>',
  send: '<path d="M4 11l14-6-4.5 14-3-6L4 11z"/>',
  trash: '<path d="M4.5 6.5h13M9 6V4.5h4V6M6.5 6.5l.8 12h7.4l.8-12"/>',
  quote: '<path d="M8.5 6.5c-2.5 1-4 3-4 6.5v3h4.5v-5h-2.7c.2-2 1-3.3 2.2-4.5zM18 6.5c-2.5 1-4 3-4 6.5v3h4.5v-5h-2.7c.2-2 1-3.3 2.2-4.5z"/>',
  resolve: '<circle cx="11" cy="11" r="8"/><path d="M7.5 11.5l2.5 2.5 4.5-5"/>',
  undo: '<path d="M8.5 5.5L4 10l4.5 4.5"/><path d="M4 10h9a5 4.5 0 0 1 0 9h-3"/>',
  redo: '<path d="M13.5 5.5L18 10l-4.5 4.5"/><path d="M18 10H9a5 4.5 0 0 0 0 9h3"/>',
  zoomIn: '<circle cx="10" cy="10" r="6.5"/><path d="M15 15l4 4M10 7.5v5M7.5 10h5"/>',
  zoomOut: '<circle cx="10" cy="10" r="6.5"/><path d="M15 15l4 4M7.5 10h5"/>',
}

export function icon(name) {
  const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg')
  svg.setAttribute('viewBox', '0 0 22 22')
  svg.setAttribute('class', 'icon')
  svg.innerHTML = ICONS[name] || ''
  return svg
}

export async function initAuth(nextPath) {
  const res = await fetch('/api/me').then(r => r.json())
  const whoami = document.getElementById('whoami')
  if (res.user) {
    res.user.buildId = res.build_id || null
    whoami.replaceChildren()
    if (res.user.avatar) {
      const img = document.createElement('img')
      img.src = res.user.avatar
      whoami.appendChild(img)
    }
    whoami.appendChild(document.createTextNode(res.user.username + ' '))
    const out = document.createElement('a')
    out.href = '/auth/logout'
    out.textContent = 'sign out'
    whoami.appendChild(out)
    return { ...res.user, isAdmin: res.is_admin === true }
  }
  const overlay = document.getElementById('signin')
  overlay.classList.remove('hidden')
  if (!res.oauth) {
    document.getElementById('signin-btn').classList.add('hidden')
    document.getElementById('dev-login').classList.remove('hidden')
    document.getElementById('dev-go').addEventListener('click', () => {
      const u = document.getElementById('dev-user').value.trim()
      if (u) location.href = `/auth/dev?u=${encodeURIComponent(u)}&next=${encodeURIComponent(nextPath)}`
    })
  } else {
    // Plain in-place navigation, also inside the huggingface.co iframe: the HF
    // OAuth page renders there, while target="_top" clicks get blocked by the
    // iframe sandbox.
    document.getElementById('signin-btn').href = `/auth/login?next=${encodeURIComponent(nextPath)}`
  }
  return null
}

export async function api(path, { method = 'GET', body } = {}) {
  const res = await fetch(path, {
    method,
    headers: body ? { 'content-type': 'application/json' } : undefined,
    body: body ? JSON.stringify(body) : undefined,
  })
  try {
    return await res.json()
  } catch {
    return { error: `HTTP ${res.status}` }
  }
}

export function el(tag, attrs = {}, text) {
  const node = document.createElement(tag)
  for (const [k, v] of Object.entries(attrs)) node.setAttribute(k, v)
  if (text != null) node.textContent = text
  return node
}

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

export function renderMentionText(text) {
  return esc(text).replace(/@([a-z0-9][a-z0-9_.-]{1,38})/g, '<span class="mention">@$1</span>')
}

export function colorFor(name) {
  let h = 0
  for (const c of String(name)) h = (h * 31 + c.charCodeAt(0)) % 360
  return `hsl(${h}, 32%, 46%)`
}

export function timeAgo(ts) {
  if (!ts) return ''
  const s = Math.floor((Date.now() - ts) / 1000)
  if (s < 60) return 'now'
  if (s < 3600) return `${Math.floor(s / 60)}m`
  if (s < 86400) return `${Math.floor(s / 3600)}h`
  return `${Math.floor(s / 86400)}d`
}

// One-time display of a freshly issued agent key, with copy actions.
export function agentKeyBox({ handle, key, docId }) {
  const box = el('div', { class: 'key-box' })
  box.appendChild(el('div', { class: 'key-label' }, `Key for @${handle} — copy it now, it won't be shown again:`))
  box.appendChild(el('code', {}, key))
  const row = el('div', { class: 'row' })
  const copyKey = el('button', { class: 'btn small', type: 'button' }, 'Copy key')
  copyKey.addEventListener('click', async () => {
    await navigator.clipboard.writeText(key)
    copyKey.textContent = 'Copied'
    setTimeout(() => (copyKey.textContent = 'Copy key'), 1500)
  })
  const copyPrompt = el('button', { class: 'btn small primary', type: 'button' }, 'Copy agent prompt (incl. key)')
  copyPrompt.addEventListener('click', async () => {
    const text = await fetch(`/api/agent-prompt?handle=${handle}${docId ? `&doc=${docId}` : ''}`).then(r => r.text())
    await navigator.clipboard.writeText(text.replace('<the key>', key))
    copyPrompt.textContent = 'Copied'
    setTimeout(() => (copyPrompt.textContent = 'Copy agent prompt (incl. key)'), 1500)
  })
  const dismiss = el('button', { class: 'btn small ghost', type: 'button' }, 'Done')
  dismiss.addEventListener('click', () => box.remove())
  row.append(copyKey, copyPrompt, dismiss)
  box.appendChild(row)
  return box
}

export function statusLabel(status) {
  return { pending: 'pending', claimed: 'seen', done: 'handled', failed: 'failed' }[status] || status
}