{% extends "base.html" %}
{% block content %}
<h1>Plan Comparison</h1>

<div class="card" style="display:flex; justify-content:space-between; align-items:center;">
  <span class="muted">Estimated cost based on your actual usage over the selected period.</span>
  <select id="range-select">
    <option value="30">Last 30 days</option>
    <option value="90" selected>Last 90 days</option>
    <option value="365">Last 365 days</option>
  </select>
</div>

<div class="card">
  <p id="plans-caption" class="muted"></p>
  <table id="plans-table">
    <thead>
      <tr>
        <th>Retailer</th>
        <th>Plan</th>
        <th>Est. annual cost</th>
        <th>Savings vs current</th>
        <th></th>
      </tr>
    </thead>
    <tbody id="plans-tbody">
      <tr><td colspan="5" class="muted">Loading&hellip;</td></tr>
    </tbody>
  </table>
</div>

<script>
function fmtMoney(v) {
  if (v === null || v === undefined) return '&mdash;';
  return '$' + v.toFixed(2);
}

function renderBreakdown(row) {
  const usage = row.usage_breakdown.map(c => `${c.label}: ${c.kwh.toFixed(1)} kWh &times; rate = $${c.cost_dollars.toFixed(2)}`).join('<br>');
  const feedIn = row.feed_in_breakdown.map(c => `${c.label}: ${c.kwh.toFixed(1)} kWh credited $${(-c.cost_dollars).toFixed(2)}`).join('<br>');
  const notes = row.modeling_notes.length ? `<div class="notes">${row.modeling_notes.join('<br>')}</div>` : '';
  return `
    <div style="font-size:0.85rem;">
      <strong>Usage</strong><br>${usage || '&mdash;'}<br>
      <strong>Feed-in credit</strong><br>${feedIn || '&mdash;'}<br>
      <strong>Supply charge:</strong> $${row.supply_charge_dollars.toFixed(2)}<br>
      ${row.unconditional_discount_dollars ? `<strong>Discount applied:</strong> -$${row.unconditional_discount_dollars.toFixed(2)}<br>` : ''}
      ${row.potential_conditional_savings_dollars ? `<strong>Potential extra saving (conditional):</strong> $${row.potential_conditional_savings_dollars.toFixed(2)}<br>` : ''}
      Based on ${row.days_with_data} day(s) of data${row.is_estimate ? ' (annualized estimate)' : ''}.
      ${notes}
    </div>
  `;
}

async function loadPlans(days) {
  const { rows, total_plans_considered } = await fetch(`/api/plans/compare?days=${days}`).then(r => r.json());
  const tbody = document.getElementById('plans-tbody');
  if (!rows.length) {
    tbody.innerHTML = '<tr><td colspan="5" class="muted">No plans cached yet, and/or no usage data yet. The AER plan cache refreshes automatically in the background.</td></tr>';
    return;
  }
  document.getElementById('plans-caption').textContent =
    total_plans_considered > rows.length
      ? `Showing the ${rows.length} cheapest of ${total_plans_considered} plans found for your distributor.`
      : `${total_plans_considered} plan(s) found for your distributor.`;

  tbody.innerHTML = rows.map((row, i) => {
    const badges = [];
    if (row.is_current) badges.push('<span class="badge current">Current plan</span>');
    if (!row.modelable) badges.push('<span class="badge not-modelable">Not fully modeled</span>');
    if (row.modeling_notes.some(n => n.startsWith('Eligibility requirement:'))) {
      badges.push('<span class="badge not-modelable">Eligibility restricted</span>');
    }

    let savingsCell = '&mdash;';
    if (row.savings_vs_current_dollars !== null && row.savings_vs_current_dollars !== undefined && !row.is_current) {
      const cls = row.savings_vs_current_dollars >= 0 ? 'savings-positive' : 'savings-negative';
      const sign = row.savings_vs_current_dollars >= 0 ? '+' : '';
      savingsCell = `<span class="${cls}">${sign}${fmtMoney(row.savings_vs_current_dollars)}/yr</span>`;
    }

    return `
      <tr>
        <td>${row.retailer}</td>
        <td>${row.plan_name} ${badges.join(' ')}</td>
        <td>${fmtMoney(row.annualized_total_dollars)}/yr</td>
        <td>${savingsCell}</td>
        <td><button onclick="document.getElementById('detail-${i}').classList.toggle('open')" style="margin:0; padding:0.3rem 0.6rem; font-size:0.8rem;">Details</button></td>
      </tr>
      <tr id="detail-${i}" class="detail-row" style="display:none;">
        <td colspan="5">${renderBreakdown(row)}</td>
      </tr>
    `;
  }).join('');

  document.querySelectorAll('.detail-row').forEach(el => {
    el.classList.remove('open');
  });
  // simple toggle via class -> style, since we don't ship extra CSS for it
  document.querySelectorAll('button').forEach(btn => {});
}

// Toggle handler simplified: override the inline onclick approach with real display toggling.
document.addEventListener('click', (e) => {
  if (e.target.tagName === 'BUTTON' && e.target.textContent === 'Details') {
    const row = e.target.closest('tr').nextElementSibling;
    if (row) row.style.display = row.style.display === 'table-row' ? 'none' : 'table-row';
  }
});

const rangeSelect = document.getElementById('range-select');
rangeSelect.addEventListener('change', () => loadPlans(rangeSelect.value));
loadPlans(rangeSelect.value);
</script>
{% endblock %}