{% extends "base.html" %}
{% block content %}
<div class="page-header">
  <h1>Edit Transaction</h1>
</div>

<div class="review-card">
  <div class="review-meta">
    <span class="review-date">{{ transaction.date }}</span>
    <span class="review-account">{{ transaction.account }}</span>
  </div>
  <div class="review-description">{{ transaction.description }}</div>
  <div class="review-amount">${{ transaction.amount | money }}</div>

  <form method="POST" class="categorize-form">
    <div class="form-group">
      <label>Category</label>
      <div class="category-grid">
        {% for cat, subcats in categories.items() %}
        <label class="cat-option" style="--cat-color: {{ colors.get(cat, '#ddd') }};">
          <input type="radio" name="category" value="{{ cat }}"
            {% if transaction.category == cat %}checked{% endif %}
            onchange="updateSubcats(this.value)">
          <span>{{ cat }}</span>
        </label>
        {% endfor %}
      </div>
    </div>

    <div class="form-group" id="subcat-group">
      <label>Subcategory <span class="optional">(optional)</span></label>
      <select name="subcategory" id="subcat-select">
        <option value="">— none —</option>
      </select>
    </div>

    <div class="form-group">
      <label>Notes <span class="optional">(optional)</span></label>
      <input type="text" name="notes" value="{{ transaction.notes }}" placeholder="e.g. Costco run, birthday gift...">
    </div>

    <div class="form-actions">
      <button type="submit" class="btn btn-primary">Save Changes</button>
      <button type="button" class="btn btn-ghost" onclick="toggleSplit()">Split transaction</button>
      <a href="{{ url_for('transactions_view') }}" class="btn btn-ghost">Cancel</a>
    </div>
  </form>

  <!-- Split transaction panel -->
  <div id="split-panel" style="display:none;margin-top:1.5rem;">
    <div class="budget-section">
      <div class="budget-section-header" style="border-left-color:#D4A96A;">
        <h3>Split Transaction — ${{ transaction.amount | money }} total</h3>
      </div>
      <p class="muted" style="margin-bottom:1rem;font-size:0.85rem;">Divide this charge across multiple categories. Amounts must add up to ${{ transaction.amount | money }}.</p>
      <form method="POST" action="{{ url_for('split_transaction') }}">
        <input type="hidden" name="id" value="{{ transaction.id }}">
        <input type="hidden" name="redirect" value="transactions">
        <table class="budget-table">
          <thead><tr><th>Category</th><th>Subcategory</th><th>Amount</th><th>Note</th><th></th></tr></thead>
          <tbody id="split-rows">
            {% if transaction.splits %}
              {% for s in transaction.splits %}
              <tr class="split-row">
                <td>
                  <select name="split_cat_{{ loop.index0 }}" class="budget-input split-cat" onchange="updateSplitSubcat(this, {{ loop.index0 }})" style="width:130px;">
                    <option value="">— pick —</option>
                    {% for cat in categories %}<option value="{{ cat }}" {% if s.category == cat %}selected{% endif %}>{{ cat }}</option>{% endfor %}
                  </select>
                </td>
                <td><select name="split_subcat_{{ loop.index0 }}" class="budget-input split-subcat" style="width:130px;"><option value="">— none —</option></select></td>
                <td><input type="number" name="split_amt_{{ loop.index0 }}" step="0.01" min="0" class="budget-input split-amt" style="width:90px;" value="{{ s.amount }}" oninput="updateRemaining()"></td>
                <td><input type="text" name="split_note_{{ loop.index0 }}" class="budget-input" style="width:110px;" value="{{ s.note or '' }}"></td>
                <td><button type="button" onclick="this.closest('tr').remove();updateRemaining();" style="background:none;border:none;color:#c07070;cursor:pointer;font-size:1rem;">✕</button></td>
              </tr>
              {% endfor %}
            {% else %}
            <tr class="split-row">
              <td><select name="split_cat_0" class="budget-input split-cat" onchange="updateSplitSubcat(this,0)" style="width:130px;"><option value="">— pick —</option>{% for cat in categories %}<option value="{{ cat }}">{{ cat }}</option>{% endfor %}</select></td>
              <td><select name="split_subcat_0" class="budget-input split-subcat" style="width:130px;"><option value="">— none —</option></select></td>
              <td><input type="number" name="split_amt_0" step="0.01" min="0" class="budget-input split-amt" style="width:90px;" placeholder="0.00" oninput="updateRemaining()"></td>
              <td><input type="text" name="split_note_0" class="budget-input" style="width:110px;" placeholder="optional"></td>
              <td></td>
            </tr>
            <tr class="split-row">
              <td><select name="split_cat_1" class="budget-input split-cat" onchange="updateSplitSubcat(this,1)" style="width:130px;"><option value="">— pick —</option>{% for cat in categories %}<option value="{{ cat }}">{{ cat }}</option>{% endfor %}</select></td>
              <td><select name="split_subcat_1" class="budget-input split-subcat" style="width:130px;"><option value="">— none —</option></select></td>
              <td><input type="number" name="split_amt_1" step="0.01" min="0" class="budget-input split-amt" style="width:90px;" placeholder="0.00" oninput="updateRemaining()"></td>
              <td><input type="text" name="split_note_1" class="budget-input" style="width:110px;" placeholder="optional"></td>
              <td></td>
            </tr>
            {% endif %}
          </tbody>
        </table>
        <div style="margin:0.75rem 0;font-size:0.85rem;">
          Remaining: <strong id="split-remaining">${{ transaction.amount | money }}</strong>
          <button type="button" class="btn btn-ghost" style="margin-left:1rem;font-size:0.78rem;" onclick="addSplitRow()">+ Add row</button>
        </div>
        <div style="display:flex;gap:0.75rem;">
          <button type="submit" class="btn btn-primary">Save Split</button>
          <button type="button" class="btn btn-ghost" onclick="toggleSplit()">Cancel</button>
        </div>
      </form>
    </div>
  </div>

  <div style="margin-top:1.25rem;padding-top:1.25rem;border-top:1px solid var(--border);display:flex;gap:0.5rem;flex-wrap:wrap;">
    <form method="POST" action="{{ url_for('ignore_transaction') }}">
      <input type="hidden" name="id" value="{{ transaction.id }}">
      <input type="hidden" name="redirect" value="transactions">
      <button type="submit" class="btn btn-ghost" style="color:var(--text-light);font-size:0.82rem;">✓ Already tracked — ignore</button>
    </form>
    <button type="button" class="btn btn-ghost" style="background:#e8f5e9;color:#3a7d44;border:1px solid #a5d6a7;font-size:0.82rem;" onclick="document.getElementById('sinking-picker').style.display='block';this.style.display='none';">🏦 Sinking Fund Transfer</button>
    <div id="sinking-picker" style="display:none;background:#e8f5e9;border:1px solid #a5d6a7;border-radius:var(--radius);padding:0.75rem 1rem;width:100%;margin-top:0.25rem;">
      <form method="POST" action="{{ url_for('categorize_sinking_transfer') }}">
        <input type="hidden" name="id" value="{{ transaction.id }}">
        <input type="hidden" name="redirect" value="transactions">
        <label style="font-size:0.82rem;font-weight:600;display:block;margin-bottom:0.4rem;">Which sinking fund?</label>
        <div style="display:flex;gap:0.5rem;align-items:center;flex-wrap:wrap;">
          <select name="sinking_fund_name" class="budget-input" style="min-width:180px;" required>
            <option value="">— select fund —</option>
            {% for f in sinking_funds %}
            <option value="{{ f.name }}">{{ f.name }} (${{ (f.balance or 0) | money }})</option>
            {% endfor %}
          </select>
          <button type="submit" class="btn btn-primary" style="font-size:0.82rem;">Save</button>
          <button type="button" class="btn btn-ghost" style="font-size:0.82rem;" onclick="document.getElementById('sinking-picker').style.display='none';this.closest('div').previousElementSibling.style.display='inline-block';">Cancel</button>
        </div>
      </form>
    </div>
    <form method="POST" action="{{ url_for('ignore_transaction') }}">
      <input type="hidden" name="id" value="{{ transaction.id }}">
      <input type="hidden" name="label" value="Investment Transfer">
      <input type="hidden" name="redirect" value="transactions">
      <button type="submit" class="btn btn-ghost" style="background:#e3f2fd;color:#1565c0;border:1px solid #90caf9;font-size:0.82rem;">📈 Investment Transfer</button>
    </form>
    <form method="POST" action="{{ url_for('ignore_transaction') }}">
      <input type="hidden" name="id" value="{{ transaction.id }}">
      <input type="hidden" name="label" value="Savings Transfer">
      <input type="hidden" name="redirect" value="transactions">
      <button type="submit" class="btn btn-ghost" style="background:#f3e5f5;color:#6a1b9a;border:1px solid #ce93d8;font-size:0.82rem;">💰 Savings Transfer</button>
    </form>
  </div>
</div>

<script>
const subcats = {{ categories | tojson }};
const current = {{ transaction | tojson }};

function updateSubcats(cat) {
  const select = document.getElementById('subcat-select');
  const group = document.getElementById('subcat-group');
  const list = subcats[cat] || [];
  select.innerHTML = '<option value="">— none —</option>';
  list.forEach(s => {
    const opt = document.createElement('option');
    opt.value = s;
    opt.textContent = s;
    if (current.subcategory === s) opt.selected = true;
    select.appendChild(opt);
  });
  group.style.display = list.length ? 'block' : 'none';
}

const checked = document.querySelector('input[name="category"]:checked');
if (checked) updateSubcats(checked.value);
document.querySelectorAll('input[name="category"]').forEach(r => {
  r.addEventListener('change', () => updateSubcats(r.value));
});

// Split transaction
const totalAmount = {{ transaction.amount }};
const allSubcats = {{ categories | tojson }};
let splitRowCount = {{ transaction.splits | length if transaction.splits else 2 }};

function toggleSplit() {
  const panel = document.getElementById('split-panel');
  panel.style.display = panel.style.display === 'none' ? 'block' : 'none';
  if (panel.style.display === 'block') updateRemaining();
}

function updateSplitSubcat(selectEl, idx) {
  const cat = selectEl.value;
  const subcatSel = document.querySelector(`select[name="split_subcat_${idx}"]`);
  const list = allSubcats[cat] || [];
  const current = subcatSel ? subcatSel.dataset.current || '' : '';
  subcatSel.innerHTML = '<option value="">— none —</option>';
  list.forEach(s => {
    const opt = document.createElement('option');
    opt.value = s; opt.textContent = s;
    if (s === current) opt.selected = true;
    subcatSel.appendChild(opt);
  });
}

function updateRemaining() {
  const inputs = document.querySelectorAll('.split-amt');
  let used = 0;
  inputs.forEach(el => used += parseFloat(el.value) || 0);
  const remaining = Math.round((totalAmount - used) * 100) / 100;
  const el = document.getElementById('split-remaining');
  el.textContent = '$' + remaining.toFixed(2);
  el.style.color = Math.abs(remaining) < 0.01 ? '#5A9E68' : (remaining < 0 ? '#c07070' : 'inherit');
}

function addSplitRow() {
  const idx = splitRowCount++;
  const tbody = document.getElementById('split-rows');
  const row = document.createElement('tr');
  row.className = 'split-row';
  row.innerHTML = `
    <td><select name="split_cat_${idx}" class="budget-input split-cat" onchange="updateSplitSubcat(this,${idx})" style="width:130px;">
      <option value="">— pick —</option>
      ${Object.keys(allSubcats).map(c => `<option value="${c}">${c}</option>`).join('')}
    </select></td>
    <td><select name="split_subcat_${idx}" class="budget-input split-subcat" style="width:130px;"><option value="">— none —</option></select></td>
    <td><input type="number" name="split_amt_${idx}" step="0.01" min="0" class="budget-input split-amt" style="width:90px;" placeholder="0.00" oninput="updateRemaining()"></td>
    <td><input type="text" name="split_note_${idx}" class="budget-input" style="width:110px;" placeholder="optional"></td>
    <td><button type="button" onclick="this.closest('tr').remove();updateRemaining();" style="background:none;border:none;color:#c07070;cursor:pointer;font-size:1rem;">✕</button></td>
  `;
  tbody.appendChild(row);
}

// Pre-populate subcats for existing splits
document.querySelectorAll('.split-cat').forEach((sel, idx) => {
  if (sel.value) updateSplitSubcat(sel, idx);
});

// Open split panel automatically if transaction already has splits
{% if transaction.splits %}
toggleSplit();
{% endif %}
</script>
{% endblock %}