// Email Engine client — sequence picker, brief, then a card per email with
// its own copy button (people paste them one at a time into an autoresponder).
(function () {
  'use strict';
  var KINDS = [
    { k: 'welcome', label: 'Welcome series (4)' },
    { k: 'followup', label: 'Follow-up series (4)' },
    { k: 'reengage', label: 'Re-engagement (3)' },
    { k: 'broadcast', label: 'Single broadcast' }
  ];
  var PLACEHOLDERS = {
    welcome: "e.g. New members who joined from my warm market — most are brand new to crypto and a little nervous",
    followup: "e.g. People who watched my video and said they'd think about it — no pressure, keep it useful",
    reengage: "e.g. Members who joined a month ago, got their wallet set up, then went quiet",
    broadcast: "e.g. My marketing list — they know me from my content, not from crypto. Lead with the toolkit angle."
  };
  var $ = function (id) { return document.getElementById(id); };
  var kind = 'welcome', busy = false;

  function renderKinds() {
    var host = $('emKinds');
    host.innerHTML = '';
    KINDS.forEach(function (x) {
      var b = document.createElement('button');
      b.type = 'button';
      b.className = 'em-kind' + (x.k === kind ? ' on' : '');
      b.textContent = x.label;
      b.addEventListener('click', function () {
        kind = x.k;
        $('emBrief').placeholder = PLACEHOLDERS[kind] || '';
        renderKinds();
      });
      host.appendChild(b);
    });
  }

  function showMeter(m) {
    if (!m || !m.limit) { $('emMeter').textContent = ''; return; }
    $('emMeter').innerHTML = '<b>' + m.remaining + '</b> of ' + m.limit + ' emails left this month';
  }

  function gate(msg) {
    var g = $('emGate');
    g.style.display = 'block';
    g.innerHTML = msg;
    $('emCard').style.opacity = '.55';
    $('emGo').disabled = true;
    $('emBrief').disabled = true;
  }

  function renderEmails(list) {
    var out = $('emOut');
    out.innerHTML = '';
    list.forEach(function (e, i) {
      var d = document.createElement('div');
      d.className = 'em-mail';
      d.innerHTML = '<div class="n">Email ' + (i + 1) + '</div><div class="s"></div><div class="b"></div>' +
        '<div class="act"><button class="btn btn-teal btn-sm">📋 Copy this email</button> <span class="em-hint ok" style="display:none;color:var(--teal)">Copied.</span></div>';
      d.querySelector('.s').textContent = e.subject;
      d.querySelector('.b').textContent = e.body;
      d.querySelector('button').addEventListener('click', function () {
        navigator.clipboard.writeText('Subject: ' + e.subject + '\n\n' + e.body).then(function () {
          var ok = d.querySelector('.ok');
          ok.style.display = '';
          setTimeout(function () { ok.style.display = 'none'; }, 2200);
        });
      });
      out.appendChild(d);
    });
    out.style.display = 'block';
  }

  async function boot() {
    renderKinds();
    try {
      var r = await fetch('/api/public/suite-meters');
      if (r.status === 401) { gate('You’re not signed in yet. <a href="/suite" style="color:var(--gold);font-weight:700">Open the Suite</a> and connect the wallet that holds your position, then come back.'); return; }
      if (r.status === 403) { gate('The Email Engine isn’t open for this position yet. <a href="/suite" style="color:var(--gold);font-weight:700">See your Suite</a>.'); return; }
      if (!r.ok) return;
      var d = await r.json();
      var m = d.meters && d.meters.email;
      if (m && m.reason === 'locked') {
        gate('The Email Engine unlocks at <b>Fabrica (level 3)</b>. You’re at level ' + d.level + ' — keep climbing and it opens, along with the Video Maker. <a href="/how-pay-works#exact-costs" style="color:var(--gold);font-weight:700">See what upgrades cost →</a>');
        return;
      }
      showMeter(m);
    } catch (e) {}
  }

  async function run() {
    if (busy) return;
    busy = true;
    $('emErr').style.display = 'none';
    $('emGo').disabled = true;
    $('emGo').innerHTML = '<span class="spin"></span>Writing the sequence… (up to two minutes)';
    try {
      var r = await fetch('/api/public/suite-email', {
        method: 'POST', headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ kind: kind, brief: $('emBrief').value.trim() })
      });
      var d = await r.json();
      if (!r.ok) {
        $('emErr').textContent = d.error || 'That didn’t go through — try again.';
        $('emErr').style.display = 'block';
        if (d.meter) showMeter(d.meter);
      } else {
        renderEmails(d.emails || []);
        showMeter(d.meter);
        $('emOut').scrollIntoView({ behavior: 'smooth', block: 'nearest' });
      }
    } catch (e) {
      $('emErr').textContent = 'Connection hiccup — try again.';
      $('emErr').style.display = 'block';
    }
    busy = false;
    $('emGo').disabled = false;
    $('emGo').textContent = '✉️ Write the sequence';
  }

  document.addEventListener('DOMContentLoaded', function () {
    boot();
    $('emGo').addEventListener('click', run);
  });
})();