{% extends "base.html" %}
{% block content %}
<div class="page-container">
<div class="issue-detail">
  <h1>BMO-{{ issue.id }}: {{ issue.title }}</h1>
  <div class="meta" id="issue-meta">
    <span class="badge" id="status-badge">{{ issue.status }}</span>
    <span class="badge priority-{{ issue.priority }}">{{ issue.priority }}</span>
    <span class="badge kind-{{ issue.kind }}">{{ issue.kind }}</span>
    {% if issue.assignee %}<span>{{ issue.assignee }}</span>{% endif %}
  </div>
  {% if issue.description %}
  <div class="description">{{ issue.description | markdown }}</div>
  {% endif %}

  {% if issue.files %}
  <h2>Files</h2>
  <div class="description">
    <ul class="file-list">
      {% for f in issue.files %}<li><code>{{ f }}</code></li>{% endfor %}
    </ul>
  </div>
  {% endif %}

  {% if relations %}
  <h2>Relations</h2>
  <div class="description">
    <ul class="relation-list">
      {% for r in relations %}
      <li>
        {% if r.kind == "blocks" %}→ blocks <a href="/issues/{{ r.to_id }}">BMO-{{ r.to_id }}</a>
        {% elif r.kind == "blocked-by" %}← blocked by <a href="/issues/{{ r.to_id }}">BMO-{{ r.to_id }}</a>
        {% elif r.kind == "depends-on" %}→ depends on <a href="/issues/{{ r.to_id }}">BMO-{{ r.to_id }}</a>
        {% elif r.kind == "dependency-of" %}← dependency of <a href="/issues/{{ r.to_id }}">BMO-{{ r.to_id }}</a>
        {% elif r.kind == "relates-to" %}↔ relates to <a href="/issues/{{ r.to_id }}">BMO-{{ r.to_id }}</a>
        {% elif r.kind == "duplicates" %}→ duplicates <a href="/issues/{{ r.to_id }}">BMO-{{ r.to_id }}</a>
        {% elif r.kind == "duplicate-of" %}← duplicate of <a href="/issues/{{ r.to_id }}">BMO-{{ r.to_id }}</a>
        {% else %}{{ r.kind }} <a href="/issues/{{ r.to_id }}">BMO-{{ r.to_id }}</a>
        {% endif %}
      </li>
      {% endfor %}
    </ul>
  </div>
  {% endif %}

  {% if comments %}
  <h2>Comments</h2>
  {% for c in comments %}
  <div class="comment"><strong>{{ c.author | default("anonymous") }}</strong><div class="comment-body">{{ c.body | markdown }}</div></div>
  {% endfor %}
  {% endif %}

  <div id="comment-list"></div>

  <h2>Add a Comment</h2>

  <div id="in-progress-warning" class="warning-banner" style="display: none;">
    This issue is in progress — your comment may be rejected.
  </div>

  <div id="comment-error" class="comment-error" style="display: none;"></div>

  <form id="comment-form" class="comment-form" novalidate>
    <textarea
      id="comment-body"
      name="body"
      class="comment-textarea"
      placeholder="Write a comment..."
      rows="4"
      required
      minlength="1"
    ></textarea>
    <div class="comment-form-actions">
      <button type="submit" id="comment-submit" class="btn btn-primary">Add Comment</button>
    </div>
  </form>
</div>
</div>

<style>
  .warning-banner {
    background: color-mix(in srgb, var(--high) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--high) 40%, transparent);
    color: var(--high);
    border-radius: 6px;
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 12px;
  }

  .comment-error {
    background: color-mix(in srgb, var(--critical) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--critical) 40%, transparent);
    color: var(--critical);
    border-radius: 6px;
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 12px;
  }

  .comment-form {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    margin-top: 8px;
    box-shadow: var(--shadow-sm);
  }

  .comment-textarea {
    width: 100%;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-family: inherit;
    font-size: 13px;
    line-height: 1.6;
    padding: 10px 14px;
    resize: vertical;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
  }

  .comment-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
  }

  .comment-textarea:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }

  .comment-form-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 10px;
  }

  .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
  }

  .comment-new {
    border-color: var(--accent);
    animation: highlight-fade 1.5s ease forwards;
  }

  @keyframes highlight-fade {
    0%   { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--surface)); }
    100% { border-color: var(--border); background: var(--surface); }
  }
</style>

<script>
  (function () {
    const ISSUE_ID = {{ issue.id }};
    const INITIAL_STATUS = "{{ issue.status }}"; // safe: server-controlled enum, kebab-case values only (e.g. "in-progress")

    const warningBanner = document.getElementById('in-progress-warning');
    const errorDiv = document.getElementById('comment-error');
    const form = document.getElementById('comment-form');
    const textarea = document.getElementById('comment-body');
    const submitBtn = document.getElementById('comment-submit');
    const commentList = document.getElementById('comment-list');
    const statusBadge = document.getElementById('status-badge');

    // Track current status for polling updates
    let currentStatus = INITIAL_STATUS;

    function isInProgress(status) {
      return status === 'in-progress' || status === 'in_progress';
    }

    function updateWarningBanner(status) {
      if (isInProgress(status)) {
        warningBanner.style.display = '';
      } else {
        warningBanner.style.display = 'none';
      }
    }

    function updateStatusBadge(status) {
      statusBadge.textContent = status;
    }

    function showError(msg) {
      errorDiv.textContent = msg;
      errorDiv.style.display = '';
    }

    function clearError() {
      errorDiv.textContent = '';
      errorDiv.style.display = 'none';
    }

    function setFormDisabled(disabled) {
      textarea.disabled = disabled;
      submitBtn.disabled = disabled;
    }

    function reloadAfterComment() {
      window.location.reload();
    }

    // Show warning banner on page load if already in-progress
    updateWarningBanner(currentStatus);

    // Handle form submission
    form.addEventListener('submit', async function (e) {
      e.preventDefault();

      const body = textarea.value.trim();
      if (!body) {
        showError('Comment cannot be empty.');
        textarea.focus();
        return;
      }

      clearError();
      setFormDisabled(true);

      try {
        const response = await fetch('/api/issues/' + ISSUE_ID + '/comments', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ body: body }),
        });

        if (response.status === 201) {
          reloadAfterComment();
        } else if (response.status === 409) {
          showError('This issue is currently in progress. Your comment was not saved.');
        } else {
          showError('An error occurred. Please try again.');
        }
      } catch (err) {
        showError('An error occurred. Please try again.');
      } finally {
        setFormDisabled(false);
      }
    });

    // Fetch the current status from the API and update the badge if it changed.
    async function refreshStatus() {
      try {
        const response = await fetch('/api/issues/' + ISSUE_ID);
        if (response.ok) {
          const data = await response.json();
          const newStatus = data.data && data.data.status;
          if (newStatus && newStatus !== currentStatus) {
            currentStatus = newStatus;
            updateStatusBadge(newStatus);
            updateWarningBanner(newStatus);
          }
        }
      } catch (_) {
        // Silently ignore fetch errors
      }
    }

    // Subscribe to SSE board_updated events — refresh status on each change.
    // Named function so onerror can schedule a reconnect on permanent closure.
    var sseReconnecting = false;

    function connectSSE() {
      sseReconnecting = false;
      var es = new EventSource('/api/events');

      es.addEventListener('open', function () {
        // Ensure status is in sync whenever the SSE connection (re)opens.
        refreshStatus();
      });

      es.addEventListener('board_updated', function () {
        refreshStatus();
      });

      es.onerror = function (err) {
        console.warn('bmo SSE error on issue detail; will retry automatically', err);
        // If the EventSource has been permanently closed, attempt to reconnect.
        // Guard against multiple onerror firings scheduling duplicate reconnects.
        if (es.readyState === EventSource.CLOSED && !sseReconnecting) {
          sseReconnecting = true;
          setTimeout(connectSSE, 5000);
        }
      };
    }

    connectSSE();
  })();
</script>
{% endblock %}