{% extends "base.html" %}
{% block title %}Sequential Testing{% endblock %}
{% block page_title %}Sequential Testing{% endblock %}

{% block content %}
<div class="split-panel">

  <!-- Left: Parameters -->
  <div class="panel-left">
    <div class="panel-header">
      <span class="panel-header-title">Parameters</span>
      <div class="panel-header-actions">
        <button class="icon-btn" id="reset-btn" title="Reset to defaults">
          <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
            <path d="M3 12a9 9 0 1 0 9-9 9.75 9.75 0 0 0-6.74 2.74L3 8"/>
            <path d="M3 3v5h5"/>
          </svg>
        </button>
      </div>
    </div>
    <div class="panel-body">

      <div class="collapsible-section">
        <button class="collapsible-trigger" aria-expanded="true" data-target="group-effect">
          Experiment Parameters
          <svg class="chevron" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"/></svg>
        </button>
        <div class="collapsible-content expanded" id="group-effect">
          <div class="form-group">
            <label for="true_effect">True underlying effect size</label>
            <div class="input-hint">Set to 0 to simulate a null experiment (no real difference)</div>
            <input type="number" id="true_effect" value="0.0" step="0.1" min="-2" max="2" />
          </div>
          <div class="form-group">
            <label for="obs_per_step">New observations per look</label>
            <div class="input-hint">Observations collected at each interim check</div>
            <input type="number" id="obs_per_step" value="50" min="10" max="500" />
          </div>
          <div class="form-group">
            <label for="total_steps">Total number of interim looks</label>
            <div class="input-hint">How many times you check during the experiment</div>
            <input type="number" id="total_steps" value="20" min="5" max="50" />
          </div>
          <div class="form-group">
            <label for="alpha_seq">Significance level (α)</label>
            <input type="number" id="alpha_seq" value="0.05" step="0.01" min="0.01" max="0.20" />
          </div>
        </div>
      </div>

      <div class="collapsible-section">
        <button class="collapsible-trigger" aria-expanded="true" data-target="group-sims">
          Simulation
          <svg class="chevron" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"/></svg>
        </button>
        <div class="collapsible-content expanded" id="group-sims">
          <div class="form-group">
            <label for="num_sims">Number of simulation runs</label>
            <div class="input-hint">More runs = more stable estimates (max 50). Changes here require clicking Run.</div>
            <input type="number" id="num_sims" value="30" min="5" max="50" />
          </div>
        </div>
      </div>

      <button class="btn-primary" id="sim-btn" onclick="runModule()">
        <span class="btn-spinner"></span>
        Run Simulation
      </button>

    </div>
  </div>

  <!-- Right: Results -->
  <div class="panel-right">

    <div id="empty-state" class="empty-state">
      <div class="empty-state-icon">📈</div>
      <div class="empty-state-text">Configure simulation parameters and click Run to see results.</div>
    </div>

    <div id="results-section" style="display:none;">

      <div class="kpi-row">
        <div class="kpi-tile highlight-bad">
          <div class="kpi-label">Naive Repeated Testing<br/>False Positive Rate</div>
          <div class="kpi-value" id="naive-fp">—</div>
        </div>
        <div class="kpi-tile highlight-good">
          <div class="kpi-label">Sequential Testing (OBF)<br/>False Positive Rate</div>
          <div class="kpi-value" id="seq-fp">—</div>
        </div>
      </div>

      <div class="chart-card">
        <div class="chart-header">
          <span class="chart-header-title">Naive Repeated Testing — Running p-values Across Simulations</span>
        </div>
        <div class="chart-desc">
          Each line is one simulated experiment run.
          <strong style="color:#f43f5e;">Red lines</strong> crossed α at least once during the run —
          a false positive when no true effect exists.
        </div>
        <div class="chart-body">
          <div id="chart-naive" class="chart-placeholder"></div>
        </div>
      </div>

      <div class="chart-card">
        <div class="chart-header">
          <span class="chart-header-title">Sequential Testing with O'Brien-Fleming Boundary</span>
        </div>
        <div class="chart-desc">
          The green dashed boundary demands a much more extreme result early in the experiment and relaxes
          as more data accumulates — enabling valid early stopping without inflating the type I error rate.
        </div>
        <div class="chart-body">
          <div id="chart-seq" class="chart-placeholder"></div>
        </div>
      </div>

      <div class="chart-card">
        <div class="chart-header">
          <span class="chart-header-title">False Positive Rate — Naive vs Sequential</span>
        </div>
        <div class="chart-body">
          <div id="chart-compare" class="chart-placeholder-md"></div>
        </div>
      </div>

      <div class="card">
        <div class="card-title">Interpretation</div>
        <div class="interpretation" id="interp-text"></div>
      </div>

    </div>
  </div>

</div>
{% endblock %}

{% block scripts %}
<script>
let simInFlight = false;

window.runModule = async function simulate() {
  if (simInFlight) return;
  simInFlight = true;
  hideError();
  showSpinner();
  const btn = document.getElementById('sim-btn');
  btn.classList.add('loading');
  btn.disabled = true;

  const payload = {
    true_effect:  parseFloat(document.getElementById('true_effect').value),
    obs_per_step: parseInt(document.getElementById('obs_per_step').value),
    total_steps:  parseInt(document.getElementById('total_steps').value),
    alpha:        parseFloat(document.getElementById('alpha_seq').value),
    num_sims:     parseInt(document.getElementById('num_sims').value),
  };

  try {
    const resp = await fetch('/sequential/simulate', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(payload),
    });
    const r = await resp.json();
    if (r.error) { showError(r.error); return; }

    document.getElementById('naive-fp').textContent = r.naive_fp_rate + '%';
    document.getElementById('seq-fp').textContent   = r.seq_fp_rate   + '%';
    document.getElementById('interp-text').innerHTML = r.interpretation;
    document.getElementById('empty-state').style.display = 'none';
    document.getElementById('results-section').style.display = 'block';

    renderChart('chart-naive',   r.chart_naive);
    renderChart('chart-seq',     r.chart_seq);
    renderChart('chart-compare', r.chart_compare);
  } catch(e) {
    showError(e.message);
  } finally {
    hideSpinner();
    btn.classList.remove('loading');
    btn.disabled = false;
    simInFlight = false;
  }
};

// Selective debounce: num_sims only via button click
['true_effect', 'obs_per_step', 'total_steps', 'alpha_seq'].forEach(id => {
  document.getElementById(id).addEventListener('input', debounce(runModule, 800));
});

registerDefaults({
  true_effect: '0.0',
  obs_per_step: '50',
  total_steps: '20',
  alpha_seq: '0.05',
  num_sims: '30',
});

window.addEventListener('load', runModule);
</script>
{% endblock %}