{% extends "base.html" %}

{% block title %}Batch Processing — ICH Screening{% endblock %}

{% block content %}
<section class="breadcrumb">
  <a href="{{ url_for('home') }}">Home</a>
  <span class="sep">/</span>
  <a href="{{ url_for('upload') }}">Upload</a>
  <span class="sep">/</span>
  <span>Batch {{ batch_id }}</span>
</section>

<section class="batch-header">
  <h1 id="batchTitle">Processing Batch&hellip;</h1>
  <p class="muted" id="batchSubtitle">
    Analyzing {{ batch.total }} DICOM file{{ 's' if batch.total != 1 }} — please keep this page open.
  </p>
</section>

<!-- ── Progress bar ────────────────────────────────────────────────── -->
<section class="panel batch-panel">
  <div class="batch-stats-row">
    <div class="batch-stat">
      <span class="batch-stat-label">Total</span>
      <span class="batch-stat-value" id="statTotal">{{ batch.total }}</span>
    </div>
    <div class="batch-stat">
      <span class="batch-stat-label">Processed</span>
      <span class="batch-stat-value" id="statProcessed">0</span>
    </div>
    <div class="batch-stat accent-green">
      <span class="batch-stat-label">Succeeded</span>
      <span class="batch-stat-value" id="statSucceeded">0</span>
    </div>
    <div class="batch-stat accent-red">
      <span class="batch-stat-label">Failed</span>
      <span class="batch-stat-value" id="statFailed">0</span>
    </div>
  </div>

  <div class="progress-track">
    <div class="progress-fill" id="progressFill" style="width: 0%"></div>
  </div>
  <div class="progress-text">
    <span id="progressPct">0%</span>
    <span id="currentFile" class="muted"></span>
  </div>
</section>

<!-- ── Live feed of recent results ─────────────────────────────────── -->
<section class="panel" id="feedPanel" style="display: none">
  <h3>Recent Results</h3>
  <ul class="batch-feed" id="batchFeed"></ul>
</section>

<!-- ── Completion summary (shown when done) ────────────────────────── -->
<section class="panel batch-done-panel" id="donePanel" style="display: none">
  <div class="batch-done-icon">
    <svg width="48" height="48" viewBox="0 0 24 24" fill="none"
         stroke="var(--green)" stroke-width="2">
      <path d="M22 11.08V12a10 10 0 1 1-5.93-9.14" />
      <polyline points="22 4 12 14.01 9 11.01" />
    </svg>
  </div>
  <h2>Batch Complete</h2>
  <p class="muted" id="doneSummary"></p>
  <div class="batch-done-actions">
    <a href="{{ url_for('reports') }}" class="btn btn-primary">View Reports</a>
    <a href="{{ url_for('upload') }}" class="btn">Upload More</a>
  </div>
</section>

<!-- ── Failed files (shown only if failures) ───────────────────────── -->
<section class="panel" id="failPanel" style="display: none">
  <h3 class="text-red">Failed Files</h3>
  <ul class="batch-fail-list" id="failList"></ul>
</section>
{% endblock %}

{% block scripts %}
<script>
(function () {
  var BATCH_ID    = "{{ batch_id }}";
  var POLL_MS     = 1000;
  var statusUrl   = "/batch/status/" + BATCH_ID;
  var reportsUrl  = "{{ url_for('reports') }}";

  var title        = document.getElementById("batchTitle");
  var subtitle     = document.getElementById("batchSubtitle");
  var fill         = document.getElementById("progressFill");
  var pctLabel     = document.getElementById("progressPct");
  var currentFile  = document.getElementById("currentFile");
  var statTotal    = document.getElementById("statTotal");
  var statProc     = document.getElementById("statProcessed");
  var statOK       = document.getElementById("statSucceeded");
  var statFail     = document.getElementById("statFailed");
  var feedPanel    = document.getElementById("feedPanel");
  var feedList     = document.getElementById("batchFeed");
  var donePanel    = document.getElementById("donePanel");
  var doneSummary  = document.getElementById("doneSummary");
  var failPanel    = document.getElementById("failPanel");
  var failList     = document.getElementById("failList");

  var prevIds = [];   // track already-shown image_ids

  function poll() {
    fetch(statusUrl)
      .then(function (r) { return r.json(); })
      .then(function (d) {
        var pct = d.total > 0 ? Math.round(d.processed / d.total * 100) : 0;

        /* Update numbers */
        statTotal.textContent = d.total;
        statProc.textContent  = d.processed;
        statOK.textContent    = d.succeeded;
        statFail.textContent  = d.failed_count;

        /* Progress bar */
        fill.style.width = pct + "%";
        pctLabel.textContent = pct + "%";

        /* Current file label */
        if (d.current_file) {
          currentFile.textContent = "Processing: " + d.current_file;
        } else {
          currentFile.textContent = "";
        }

        /* Live feed of recently processed IDs */
        if (d.image_ids && d.image_ids.length) {
          feedPanel.style.display = "block";
          d.image_ids.forEach(function (iid) {
            if (prevIds.indexOf(iid) === -1) {
              prevIds.push(iid);
              var li = document.createElement("li");
              var a  = document.createElement("a");
              a.href = "/case/" + iid;
              a.textContent = iid;
              li.appendChild(a);
              feedList.insertBefore(li, feedList.firstChild);
              /* Keep max 20 items visible */
              while (feedList.children.length > 20) {
                feedList.removeChild(feedList.lastChild);
              }
            }
          });
        }

        /* Done? */
        if (d.status === "completed" || d.status === "failed") {
          title.textContent = "Batch Complete";
          subtitle.textContent = "";
          donePanel.style.display = "block";
          doneSummary.textContent =
            d.succeeded + " of " + d.total + " files processed successfully" +
            (d.failed_count > 0 ? ", " + d.failed_count + " failed" : "") + ".";

          /* Show failed files */
          if (d.failed_ids && d.failed_ids.length) {
            failPanel.style.display = "block";
            d.failed_ids.forEach(function (fid) {
              var li = document.createElement("li");
              li.textContent = fid;
              failList.appendChild(li);
            });
          }
          return; /* stop polling */
        }

        /* Keep polling */
        setTimeout(poll, POLL_MS);
      })
      .catch(function () {
        /* Network error — retry after a longer delay */
        setTimeout(poll, POLL_MS * 3);
      });
  }

  /* Start polling immediately */
  poll();
})();
</script>
{% endblock %}