{{template "base" .}}
{{define "title"}}Compose — GoWebMail{{end}}
{{define "body_class"}}{{end}}

{{define "body"}}
<div id="compose-page" style="width:100%;box-sizing:border-box;margin:0 auto;padding:20px 32px;min-height:100vh">
  <div style="display:flex;align-items:center;gap:12px;margin-bottom:18px;padding-bottom:14px;border-bottom:1px solid var(--border);flex-wrap:wrap">
    <a href="/" id="cp-back-link" style="color:var(--accent);text-decoration:none;font-size:13px;display:flex;align-items:center;gap:4px">
      <svg viewBox="0 0 24 24" width="16" height="16" fill="currentColor"><path d="M20 11H7.83l5.59-5.59L12 4l-8 8 8 8 1.41-1.41L7.83 13H20v-2z"/></svg>
      Back to GoWebMail
    </a>
    <span style="color:var(--border);font-size:16px">|</span>
    <span id="compose-page-title" style="font-size:14px;color:var(--text2)">New Message</span>
    <div style="margin-left:auto;display:flex;align-items:center;gap:8px;flex-wrap:wrap">
      <button class="btn-secondary" id="discard-draft-btn" style="display:none;font-size:12px;color:var(--danger)" onclick="discardDraftAndReset()">Discard draft</button>
      <button type="button" id="cc-toggle" class="btn-secondary" style="font-size:12px" onclick="cpShowCC()">+CC</button>
      <button type="button" id="bcc-toggle" class="btn-secondary" style="font-size:12px" onclick="cpShowBCC()">+BCC</button>
      <button class="btn-secondary" style="font-size:12px" onclick="triggerAttach()">📎 Attach</button>
      <button class="btn-secondary" id="save-draft-btn" onclick="saveDraft()" style="font-size:12px">💾 Save Draft</button>
      <button class="btn-secondary" id="sendlater-btn" style="font-size:12px" onclick="toggleSendLaterPanel()">🕐 Send later</button>
      <button class="modal-submit" id="send-page-btn" onclick="sendFromPage()" style="font-size:13px;padding:7px 18px">Send</button>
      <input type="file" id="cp-file-input" multiple style="display:none" onchange="addPageAttachments(this.files)">
    </div>
  </div>

  <div id="cp-leave-confirm" class="remote-content-banner" style="display:none;margin-bottom:14px">
    You have a draft in progress.
    <button class="rcb-btn" id="cp-leave-keep">Keep editing</button>
    <button class="rcb-btn" id="cp-leave-save">Save &amp; leave</button>
    <button class="rcb-btn" id="cp-leave-discard">Discard &amp; leave</button>
  </div>

  <div id="cp-sendlater-panel" class="remote-content-banner" style="display:none;margin-bottom:14px">
    Send at:
    <input type="datetime-local" id="cp-sendlater-input" style="background:var(--surface3);border:1px solid var(--border2);border-radius:6px;color:var(--text);padding:4px 8px;font-size:13px">
    <button class="rcb-btn" onclick="confirmSendLater()">Schedule</button>
    <button class="rcb-btn" onclick="document.getElementById('cp-sendlater-panel').style.display='none'">Cancel</button>
  </div>

  <div id="compose-page-form">
    <!-- From -->
    <div style="display:flex;align-items:center;border-bottom:1px solid var(--border);padding:8px 0;gap:8px">
      <label for="cp-from" style="font-size:12px;color:var(--muted);width:48px;flex-shrink:0">From</label>
      <select id="cp-from" style="flex:1;background:transparent;border:none;color:var(--text);font-size:13px;outline:none;cursor:pointer"></select>
    </div>
    <!-- To -->
    <div style="display:flex;align-items:flex-start;border-bottom:1px solid var(--border);padding:8px 0;gap:8px">
      <span id="cp-to-label" style="font-size:12px;color:var(--muted);width:48px;flex-shrink:0;padding-top:6px">To</span>
      <div id="cp-to-tags" class="tag-container" role="group" aria-labelledby="cp-to-label" style="flex:1;min-height:30px"></div>
    </div>
    <!-- CC -->
    <div id="cc-row" style="display:none;align-items:flex-start;border-bottom:1px solid var(--border);padding:8px 0;gap:8px">
      <span id="cp-cc-label" style="font-size:12px;color:var(--muted);width:48px;flex-shrink:0;padding-top:6px">CC</span>
      <div id="cp-cc-tags" class="tag-container" role="group" aria-labelledby="cp-cc-label" style="flex:1;min-height:30px"></div>
    </div>
    <!-- BCC -->
    <div id="bcc-row" style="display:none;align-items:flex-start;border-bottom:1px solid var(--border);padding:8px 0;gap:8px">
      <span id="cp-bcc-label" style="font-size:12px;color:var(--muted);width:48px;flex-shrink:0;padding-top:6px">BCC</span>
      <div id="cp-bcc-tags" class="tag-container" role="group" aria-labelledby="cp-bcc-label" style="flex:1;min-height:30px"></div>
    </div>
    <!-- Subject -->
    <div style="display:flex;align-items:center;border-bottom:1px solid var(--border);padding:8px 0;gap:8px">
      <label for="cp-subject" style="font-size:12px;color:var(--muted);width:48px;flex-shrink:0">Subject</label>
      <input id="cp-subject" type="text" placeholder="Subject" oninput="markDirty()" style="flex:1;background:transparent;border:none;color:var(--text);font-size:14px;outline:none;font-family:'DM Sans',sans-serif">
    </div>
    <!-- Formatting toolbar -->
    <div class="compose-toolbar" role="toolbar" aria-label="Formatting">
      <button class="fmt-btn" title="Bold" aria-label="Bold" onclick="execFmt('bold')"><b>B</b></button>
      <button class="fmt-btn" title="Italic" aria-label="Italic" onclick="execFmt('italic')"><i>I</i></button>
      <button class="fmt-btn" title="Underline" aria-label="Underline" onclick="execFmt('underline')"><u>U</u></button>
      <span class="fmt-sep"></span>
      <button class="fmt-btn" title="Bullets" aria-label="Bulleted list" onclick="execFmt('insertUnorderedList')">&#8226;&#8212;</button>
      <button class="fmt-btn" title="Numbers" aria-label="Numbered list" onclick="execFmt('insertOrderedList')">1&#8212;</button>
      <span class="fmt-sep"></span>
      <button class="fmt-btn" title="Clear format" aria-label="Clear formatting" onclick="execFmt('removeFormat')">T&#x20D7;</button>
    </div>
    <!-- Body -->
    <div id="cp-editor" contenteditable="true" role="textbox" aria-multiline="true" aria-label="Message body" oninput="markDirty()" style="min-height:400px;padding:16px 0;outline:none;font-size:14px;line-height:1.6;color:var(--text)" data-placeholder="Write your message…"></div>
    <!-- Attachments (added via the "Attach" button in the header) -->
    <div id="cp-att-list" style="border-top:1px solid var(--border);padding:10px 0;display:flex;flex-wrap:wrap;gap:6px"></div>
  </div>
  <div id="cp-status" role="status" style="font-size:13px;color:var(--muted);margin-top:8px"></div>
</div>
{{end}}

{{define "scripts"}}
<script>
// Parse URL params
const params = new URLSearchParams(location.search);
const replyId = parseInt(params.get('reply_id') || '0');
const forwardId = parseInt(params.get('forward_id') || '0');
const editDraftId = parseInt(params.get('edit_draft_id') || '0');
const cpAttachments = [];
let draftId = '', dirty = false, draftTimer = null;
let remoteWhitelist = new Set(), remoteImagePolicy = 'manual', contactsCache = null;

async function apiCall(method, path, body) {
  const opts = { method, headers: {} };
  if (body instanceof FormData) { opts.body = body; }
  else if (body) { opts.body = JSON.stringify(body); opts.headers['Content-Type'] = 'application/json'; }
  const r = await fetch('/api' + path, opts);
  return r.ok ? r.json() : null;
}

function esc(s) { return (s||'').replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;'); }
function markDirty() { dirty = true; }
function setStatus(msg, isError) {
  const el = document.getElementById('cp-status');
  el.textContent = msg;
  el.style.color = isError ? 'var(--danger)' : 'var(--muted)';
}

// ── Remote-image policy — same rules as the reading pane (app.js / message.html) ──
function stripUnresolvedCID(h){ return h.replace(/src\s*=\s*(['"])cid:[^'"]*\1/gi,'src=""').replace(/src\s*=\s*cid:\S+/gi,'src=""'); }
function stripEmbeddedFrames(h){ return h.replace(/<iframe[\s\S]*?<\/iframe>/gi,'').replace(/<iframe[^>]*>/gi,''); }
function stripRemoteImages(h){
  return h.replace(/<img(\s[^>]*?)src\s*=\s*(['"])(https?:\/\/[^'"]+)\2/gi,'<img$1src="" data-blocked-src="$3"')
          .replace(/url\s*\(\s*(['"]?)https?:\/\/[^)'"]+\1\s*\)/gi,'url()')
          .replace(/<link[^>]*>/gi,'').replace(/<script[\s\S]*?<\/script>/gi,'');
}
function isContactEmail(fromEmail) {
  if (!fromEmail || !contactsCache) return false;
  const e = fromEmail.toLowerCase();
  return contactsCache.some(c => (c.email||'').toLowerCase() === e);
}
function isRemoteContentAllowed(fromEmail) {
  if (remoteImagePolicy === 'always') return true;
  if (remoteImagePolicy === 'never') return false;
  if (remoteImagePolicy === 'contacts') return isContactEmail(fromEmail) || remoteWhitelist.has(fromEmail);
  return remoteWhitelist.has(fromEmail); // manual (default)
}
function quotedBodyHTML(msg) {
  if (!msg.body_html) return '<pre>'+esc(msg.body_text||'')+'</pre>';
  let html = stripUnresolvedCID(stripEmbeddedFrames(msg.body_html));
  if (!isRemoteContentAllowed(msg.from_email)) html = stripRemoteImages(html);
  return html;
}
function restoreBlockedImages(html) {
  return html.replace(/src=""\s+data-blocked-src="([^"]*)"/gi, 'src="$1"');
}

// ── Tag fields (To/Cc/Bcc) — same visual style as the main compose modal ──
function initTagField(id) {
  const el = document.getElementById(id);
  if (!el) return;
  el.innerHTML = '<input class="tag-input" type="email" multiple style="border:none;background:transparent;outline:none;color:var(--text);font-size:13px;min-width:180px;font-family:\'DM Sans\',sans-serif">';
  const inp = el.querySelector('input');
  inp.addEventListener('keydown', e => {
    if (e.key === 'Enter' || e.key === ',' || e.key === 'Tab') {
      e.preventDefault();
      const v = inp.value.trim().replace(/,$/, '');
      if (v) addTagTo(id, v);
      inp.value = '';
    } else if (e.key === 'Backspace' && !inp.value) {
      const tags = el.querySelectorAll('.email-tag');
      if (tags.length) { tags[tags.length-1].remove(); markDirty(); }
    }
  });
  inp.addEventListener('blur', () => {
    const v = inp.value.trim().replace(/,$/, '');
    if (v) { addTagTo(id, v); inp.value = ''; }
  });
}

function addTagTo(fieldId, email) {
  if (!email) return;
  const el = document.getElementById(fieldId);
  const inp = el.querySelector('input');
  const tag = document.createElement('span');
  tag.className = 'email-tag';
  const label = document.createElement('span');
  label.textContent = email;
  const remove = document.createElement('button');
  remove.innerHTML = '×'; remove.className = 'tag-remove'; remove.type = 'button';
  remove.onclick = e => { e.stopPropagation(); tag.remove(); markDirty(); };
  tag.appendChild(label); tag.appendChild(remove);
  el.insertBefore(tag, inp || null);
  markDirty();
}

function getTagValues(fieldId) {
  const el = document.getElementById(fieldId);
  return Array.from(el.querySelectorAll('.email-tag')).map(c => c.firstChild.textContent.trim()).filter(Boolean);
}

function cpShowCC() { document.getElementById('cc-row').style.display = 'flex'; document.getElementById('cc-toggle').style.display = 'none'; }
function cpShowBCC() { document.getElementById('bcc-row').style.display = 'flex'; document.getElementById('bcc-toggle').style.display = 'none'; }

function execFmt(cmd, val) { document.getElementById('cp-editor').focus(); document.execCommand(cmd, false, val || null); }
function triggerAttach() { document.getElementById('cp-file-input').click(); }

function addPageAttachments(files) {
  for (const f of files) {
    cpAttachments.push(f);
    const chip = document.createElement('span');
    chip.style.cssText = 'font-size:11px;padding:3px 8px;background:var(--surface3);border:1px solid var(--border2);border-radius:4px;color:var(--text2)';
    chip.textContent = f.name;
    document.getElementById('cp-att-list').appendChild(chip);
  }
  markDirty();
}

async function loadAccounts() {
  const accounts = await apiCall('GET', '/accounts') || [];
  const sel = document.getElementById('cp-from');
  accounts.forEach(a => {
    const opt = document.createElement('option');
    opt.value = a.id;
    opt.textContent = `${a.display_name || a.email_address} <${a.email_address}>`;
    sel.appendChild(opt);
  });
}

async function loadRemoteImagePrefs() {
  const [uiPrefs, wl] = await Promise.all([apiCall('GET', '/ui-prefs'), apiCall('GET', '/remote-content-whitelist')]);
  remoteImagePolicy = uiPrefs?.remoteImagePolicy || 'manual';
  if (wl?.whitelist) remoteWhitelist = new Set(wl.whitelist);
  if (remoteImagePolicy === 'contacts') contactsCache = await apiCall('GET', '/contacts') || [];
}

async function prefillReply() {
  if (!replyId) return;
  document.getElementById('compose-page-title').textContent = 'Reply';
  const msg = await apiCall('GET', '/messages/' + replyId);
  if (!msg) return;
  document.title = 'Reply: ' + (msg.subject || '') + ' — GoWebMail';
  document.getElementById('cp-subject').value = msg.subject?.startsWith('Re:') ? msg.subject : 'Re: ' + (msg.subject || '');
  addTagTo('cp-to-tags', msg.from_email || '');
  const editor = document.getElementById('cp-editor');
  editor.innerHTML = `<br><br><div style="border-left:3px solid #ccc;padding-left:12px;color:#666;margin-top:8px">
    <div style="font-size:12px;margin-bottom:4px">On ${msg.date ? new Date(msg.date).toLocaleString() : ''}, ${esc(msg.from_email)} wrote:</div>
    <div style="max-width:700px;overflow-x:auto">${quotedBodyHTML(msg)}</div>
  </div>`;
  // Set from to same account
  if (msg.account_id) {
    const sel = document.getElementById('cp-from');
    for (const opt of sel.options) { if (parseInt(opt.value) === msg.account_id) { opt.selected = true; break; } }
  }
  dirty = false;
}

async function prefillForward() {
  if (!forwardId) return;
  document.getElementById('compose-page-title').textContent = 'Forward';
  const msg = await apiCall('GET', '/messages/' + forwardId);
  if (!msg) return;
  document.title = 'Forward: ' + (msg.subject || '') + ' — GoWebMail';
  document.getElementById('cp-subject').value = 'Fwd: ' + (msg.subject || '');
  const editor = document.getElementById('cp-editor');
  editor.innerHTML = `<br><br><div style="border-left:3px solid #ccc;padding-left:12px;color:#666;margin-top:8px">
    <div style="font-size:12px;margin-bottom:4px">---------- Forwarded message ----------<br>From: ${esc(msg.from_email)}<br>Subject: ${esc(msg.subject)}</div>
    <div style="max-width:700px;overflow-x:auto">${quotedBodyHTML(msg)}</div>
  </div>`;
  if (msg.account_id) {
    const sel = document.getElementById('cp-from');
    for (const opt of sel.options) { if (parseInt(opt.value) === msg.account_id) { opt.selected = true; break; } }
  }
  dirty = false;
}

// Resuming a saved draft: unlike reply/forward, fields are populated directly (no quoting
// wrapper) and draftId is seeded from the draft's own id so the next autosave/send/discard
// replaces this exact draft in place instead of creating a second copy.
async function prefillEditDraft() {
  if (!editDraftId) return;
  document.getElementById('compose-page-title').textContent = 'Edit Draft';
  const msg = await apiCall('GET', '/messages/' + editDraftId);
  if (!msg) return;
  document.title = 'Edit Draft — GoWebMail';
  document.getElementById('cp-subject').value = msg.subject || '';
  (msg.to || '').split(',').map(s => s.trim()).filter(Boolean).forEach(a => addTagTo('cp-to-tags', a));
  const ccList = (msg.cc || '').split(',').map(s => s.trim()).filter(Boolean);
  if (ccList.length) { cpShowCC(); ccList.forEach(a => addTagTo('cp-cc-tags', a)); }
  const bccList = (msg.bcc || '').split(',').map(s => s.trim()).filter(Boolean);
  if (bccList.length) { cpShowBCC(); bccList.forEach(a => addTagTo('cp-bcc-tags', a)); }
  document.getElementById('cp-editor').innerHTML = quotedBodyHTML(msg);
  if (msg.account_id) {
    const sel = document.getElementById('cp-from');
    for (const opt of sel.options) { if (parseInt(opt.value) === msg.account_id) { opt.selected = true; break; } }
  }
  draftId = msg.remote_uid || '';
  updateDraftUI();
  dirty = false;
}

async function sendFromPage() {
  const btn = document.getElementById('send-page-btn');
  const accountId = parseInt(document.getElementById('cp-from').value || '0');
  const to = getTagValues('cp-to-tags');
  if (!accountId || !to.length) { setStatus('From account and To address required.', true); return; }
  btn.disabled = true; btn.textContent = 'Sending…';

  const meta = {
    account_id: accountId,
    to,
    cc: getTagValues('cp-cc-tags'),
    bcc: getTagValues('cp-bcc-tags'),
    subject: document.getElementById('cp-subject').value,
    body_html: restoreBlockedImages(document.getElementById('cp-editor').innerHTML.trim()),
    body_text: document.getElementById('cp-editor').innerText,
    in_reply_to_id: replyId || 0,
  };

  let r;
  const endpoint = replyId ? '/reply' : forwardId ? '/forward' : '/send';
  if (cpAttachments.length) {
    const fd = new FormData();
    fd.append('meta', JSON.stringify(meta));
    cpAttachments.forEach(f => fd.append('file', f, f.name));
    const resp = await fetch('/api' + endpoint, { method: 'POST', body: fd });
    r = await resp.json().catch(() => null);
  } else {
    r = await apiCall('POST', endpoint, meta);
  }

  btn.disabled = false; btn.textContent = 'Send';
  if (r?.ok) {
    stopAutosave();
    dirty = false;
    await discardDraftReq(); // the autosaved Drafts-folder copy is now redundant — it's been sent
    setStatus('✓ Message sent!');
    document.getElementById('compose-page-form').style.opacity = '0.5';
    document.getElementById('compose-page-form').style.pointerEvents = 'none';
    document.getElementById('cp-back-link').innerHTML = '← Back to inbox';
  } else {
    setStatus(r?.error || 'Send failed.', true);
  }
}

// ── Send later ───────────────────────────────────────────────────────────────
function toLocalInput(d) {
  const pad = n => String(n).padStart(2, '0');
  return `${d.getFullYear()}-${pad(d.getMonth()+1)}-${pad(d.getDate())}T${pad(d.getHours())}:${pad(d.getMinutes())}`;
}
function toggleSendLaterPanel() {
  const accountId = parseInt(document.getElementById('cp-from').value || '0');
  const to = getTagValues('cp-to-tags');
  if (!accountId || !to.length) { setStatus('From account and To address required.', true); return; }
  if (cpAttachments.length) { setStatus("Send later doesn't support file attachments yet — forwarded messages are fine", true); return; }
  const panel = document.getElementById('cp-sendlater-panel');
  const isOpen = panel.style.display !== 'none';
  panel.style.display = isOpen ? 'none' : 'flex';
  if (!isOpen) {
    const input = document.getElementById('cp-sendlater-input');
    input.min = toLocalInput(new Date(Date.now() + 60000));
    input.value = toLocalInput(new Date(Date.now() + 3600000));
  }
}
async function confirmSendLater() {
  const input = document.getElementById('cp-sendlater-input');
  const d = new Date(input.value);
  if (!input.value || isNaN(d.getTime()) || d <= new Date()) { setStatus('Pick a time in the future.', true); return; }
  const accountId = parseInt(document.getElementById('cp-from').value || '0');
  const to = getTagValues('cp-to-tags');
  if (!accountId || !to.length) { setStatus('From account and To address required.', true); return; }
  const meta = {
    account_id: accountId, to,
    cc: getTagValues('cp-cc-tags'), bcc: getTagValues('cp-bcc-tags'),
    subject: document.getElementById('cp-subject').value,
    body_html: restoreBlockedImages(document.getElementById('cp-editor').innerHTML.trim()),
    body_text: document.getElementById('cp-editor').innerText,
    send_at: d.toISOString(),
  };
  const r = await apiCall('POST', '/send-later', meta);
  if (r?.ok) {
    stopAutosave();
    dirty = false;
    await discardDraftReq();
    setStatus('✓ Message scheduled!');
    document.getElementById('cp-sendlater-panel').style.display = 'none';
    document.getElementById('compose-page-form').style.opacity = '0.5';
    document.getElementById('compose-page-form').style.pointerEvents = 'none';
    document.getElementById('cp-back-link').innerHTML = '← Back to inbox';
  } else {
    setStatus(r?.error || 'Failed to schedule.', true);
  }
}

// ── Draft autosave ──────────────────────────────────────────────────────────
function startAutosave() { stopAutosave(); draftTimer = setInterval(() => { if (dirty) saveDraft(true); }, 60000); }
function stopAutosave() { if (draftTimer) { clearInterval(draftTimer); draftTimer = null; } }

function updateDraftUI() {
  document.getElementById('discard-draft-btn').style.display = draftId ? 'inline-block' : 'none';
}

async function saveDraft(silent) {
  dirty = false;
  const accountId = parseInt(document.getElementById('cp-from')?.value || 0);
  if (!accountId) { if (!silent) setStatus('Add a From account first.', true); return; }
  const editor = document.getElementById('cp-editor');
  const meta = {
    account_id: accountId,
    to: getTagValues('cp-to-tags'),
    cc: getTagValues('cp-cc-tags'),
    bcc: getTagValues('cp-bcc-tags'),
    subject: document.getElementById('cp-subject').value,
    body_html: restoreBlockedImages(editor.innerHTML.trim()),
    body_text: editor.innerText.trim(),
    draft_id: draftId,
  };
  const r = await apiCall('POST', '/draft', meta);
  if (r?.ok) { draftId = r.draft_id || draftId; updateDraftUI(); setStatus(silent ? 'Draft auto-saved' : 'Draft saved'); }
  else if (!silent) setStatus(r?.error || 'Draft save failed', true);
}

// Deletes the draft that autosave already wrote to the server for this compose session.
async function discardDraftReq() {
  if (!draftId) return;
  const accountId = parseInt(document.getElementById('cp-from')?.value || 0);
  if (!accountId) return;
  await apiCall('POST', '/draft/discard', { account_id: accountId, draft_id: draftId });
  draftId = ''; updateDraftUI();
}

async function discardDraftAndReset() {
  await discardDraftReq();
  setStatus('Draft discarded');
}

// ── Leaving the page with unsent work ───────────────────────────────────────
document.getElementById('cp-back-link').addEventListener('click', e => {
  if (dirty || draftId) {
    e.preventDefault();
    document.getElementById('cp-leave-confirm').style.display = 'flex';
  }
});
document.getElementById('cp-leave-keep').onclick = () => { document.getElementById('cp-leave-confirm').style.display = 'none'; };
document.getElementById('cp-leave-discard').onclick = async () => { await discardDraftReq(); location.href = '/'; };
document.getElementById('cp-leave-save').onclick = async () => { await saveDraft(true); location.href = '/'; };
window.addEventListener('beforeunload', e => {
  if (dirty || draftId) { e.preventDefault(); e.returnValue = ''; }
});

// Init
async function boot() {
  initTagField('cp-to-tags');
  initTagField('cp-cc-tags');
  initTagField('cp-bcc-tags');
  await Promise.all([loadAccounts(), loadRemoteImagePrefs()]);
  if (replyId) await prefillReply();
  else if (forwardId) await prefillForward();
  else if (editDraftId) await prefillEditDraft();
  startAutosave();
}
boot();
</script>
{{end}}