{% extends "base.html" %}
{% block title %}{{ ticket.ticket_number }}{% endblock %}
{% block page_title %}{{ ticket.ticket_number }}{% endblock %}

{% block content %}
<div class="row g-4">
  <!-- Main column -->
  <div class="col-lg-8">

    <!-- Ticket header -->
    <div class="ticket-header mb-4">
      <div class="d-flex align-items-start justify-content-between gap-3 mb-3">
        <h2 style="font-size:20px;font-weight:700;line-height:1.3;margin:0;">{{ ticket.title }}</h2>
        <div class="d-flex gap-2 flex-shrink-0">
          <span class="badge badge-{{ ticket.priority }}">{{ ticket.priority.upper() }}</span>
          <span class="badge badge-{{ ticket.status }}">{{ ticket.status.replace('_',' ').upper() }}</span>
        </div>
      </div>
      <div class="d-flex flex-wrap gap-3" style="font-size:12px;color:var(--muted);">
        <span><i class="bi bi-hash me-1"></i><span class="mono">{{ ticket.ticket_number }}</span></span>
        <span><i class="bi bi-person me-1"></i>{{ ticket.creator.full_name }}</span>
        <span><i class="bi bi-tag me-1"></i>{{ ticket.category.replace('_',' ').title() }}</span>
        <span><i class="bi bi-calendar3 me-1"></i>{{ ticket.created_at.strftime('%b %d, %Y %H:%M') }}</span>
        {% if ticket.location %}<span><i class="bi bi-geo-alt me-1"></i>{{ ticket.location }}</span>{% endif %}
        {% if ticket.asset_tag %}<span><i class="bi bi-cpu me-1"></i>{{ ticket.asset_tag }}</span>{% endif %}
        {% if ticket.ai_generated %}<span style="color:var(--accent3);"><i class="bi bi-robot me-1"></i>AI-generated</span>{% endif %}
      </div>
    </div>

    <!-- Description -->
    <div class="card mb-4">
      <div class="card-header"><i class="bi bi-file-text me-2"></i>Description</div>
      <div class="card-body" style="white-space:pre-wrap;font-size:14px;line-height:1.7;">{{ ticket.description }}</div>
    </div>

    <!-- Attachments on ticket -->
    {% set ticket_atts = ticket.attachments.filter_by(comment_id=None).all() %}
    {% if ticket_atts %}
    <div class="card mb-4">
      <div class="card-header"><i class="bi bi-paperclip me-2"></i>Attachments</div>
      <div class="card-body d-flex flex-wrap gap-2">
        {% for att in ticket_atts %}
        <a href="{{ url_for('tickets.download_attachment', att_id=att.id) }}"
           class="btn btn-secondary btn-sm">
          <i class="bi bi-download me-1"></i>{{ att.filename }}
          <span style="font-size:10px;color:var(--muted);">({{ (att.file_size/1024)|int }}KB)</span>
        </a>
        {% endfor %}
      </div>
    </div>
    {% endif %}

    <!-- Resolution notes (IT only, or if resolved) -->
    {% if ticket.resolution_notes %}
    <div class="card mb-4" style="border-color:var(--success);">
      <div class="card-header" style="background:rgba(45,212,191,.08);color:var(--success);">
        <i class="bi bi-check-circle me-2"></i>Resolution Notes
      </div>
      <div class="card-body" style="white-space:pre-wrap;font-size:14px;">{{ ticket.resolution_notes }}</div>
    </div>
    {% endif %}

    <!-- Comments -->
    <div class="mb-3 d-flex align-items-center justify-content-between">
      <h5 style="font-size:16px;font-weight:700;margin:0;">
        <i class="bi bi-chat-dots me-2"></i>Comments
        <span id="comment-count" style="font-size:13px;color:var(--muted);">({{ comments|length }})</span>
      </h5>
      <button id="refresh-comments-btn" onclick="refreshComments()"
              class="btn btn-secondary btn-sm" title="Refresh comments">
        <i class="bi bi-arrow-clockwise me-1"></i>Refresh
      </button>
    </div>

    <div id="comments-list">
    {% for comment in comments %}
    <div class="comment-card {% if comment.is_internal %}internal{% endif %}" id="comment-{{ comment.id }}">
      <div class="d-flex align-items-center justify-content-between mb-2">
        <div class="d-flex align-items-center gap-2">
          <div style="width:28px;height:28px;border-radius:50%;background:var(--accent2);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;">
            {{ comment.author.full_name[0].upper() }}
          </div>
          <span class="comment-author">{{ comment.author.full_name }}</span>
          {% if comment.author.is_it_staff %}
            <span style="font-size:10px;background:rgba(0,180,216,.15);color:var(--accent3);padding:1px 7px;border-radius:4px;font-weight:600;">IT STAFF</span>
          {% endif %}
          {% if comment.is_internal %}
            <span style="font-size:10px;background:rgba(251,191,36,.15);color:var(--warning);padding:1px 7px;border-radius:4px;font-weight:600;">INTERNAL NOTE</span>
          {% endif %}
        </div>
        <div class="d-flex align-items-center gap-2">
          <span class="comment-time">{{ comment.created_at.strftime('%b %d, %Y %H:%M') }}</span>
          {% if current_user.is_it_staff or comment.author_id == current_user.id %}
          <form method="POST" action="{{ url_for('tickets.delete_comment', comment_id=comment.id) }}"
                onsubmit="return confirm('Delete this comment?');">
            <input type="hidden" name="csrf_token" value="{{ csrf_token() }}"/>
            <button type="submit" class="btn btn-sm" style="background:none;border:none;color:var(--muted);padding:2px 6px;"
                    title="Delete comment">
              <i class="bi bi-trash"></i>
            </button>
          </form>
          {% endif %}
        </div>
      </div>
      <div class="comment-body">{{ comment.body }}</div>
      {% set c_atts = comment.attachments.all() %}
      {% if c_atts %}
      <div class="mt-2 d-flex flex-wrap gap-2">
        {% for att in c_atts %}
        <a href="{{ url_for('tickets.download_attachment', att_id=att.id) }}" class="btn btn-secondary btn-sm">
          <i class="bi bi-download me-1"></i>{{ att.filename }}
        </a>
        {% endfor %}
      </div>
      {% endif %}
    </div>
    {% else %}
    <div id="no-comments-placeholder" class="p-4 text-center" style="color:var(--muted);font-size:13px;">
      <i class="bi bi-chat" style="font-size:28px;display:block;margin-bottom:8px;"></i>
      No comments yet. Be the first to add an update.
    </div>
    {% endfor %}
    </div>

    <!-- Add comment -->
    {% if ticket.status not in ('closed',) %}
    <div class="card mt-4">
      <div class="card-header"><i class="bi bi-chat-plus me-2"></i>Add Comment</div>
      <div class="card-body">
        <form id="comment-form" enctype="multipart/form-data">
          <input type="hidden" name="csrf_token" value="{{ csrf_token() }}"/>
          <div class="mb-3">
            <textarea id="comment-body" class="form-control" name="body" rows="4" required
                      placeholder="Add your update, follow-up, or response here…"></textarea>
          </div>
          <div class="mb-3">
            <label class="form-label">Attachments</label>
            <input type="file" class="form-control" name="attachments" multiple
                   accept=".png,.jpg,.jpeg,.gif,.pdf,.doc,.docx,.txt,.zip,.log"/>
          </div>
          {% if current_user.is_it_staff %}
          <div class="mb-3 d-flex align-items-center gap-2">
            <input type="checkbox" id="is_internal" name="is_internal" style="accent-color:var(--warning);"/>
            <label for="is_internal" style="font-size:13px;color:var(--warning);margin:0;cursor:pointer;">
              <i class="bi bi-lock me-1"></i>Internal note (IT staff only)
            </label>
          </div>
          {% endif %}
          <div id="comment-error" style="display:none;color:var(--danger);font-size:13px;margin-bottom:8px;"></div>
          <button type="submit" id="comment-submit-btn" class="btn btn-primary">
            <i class="bi bi-send me-2"></i>Post Comment
          </button>
        </form>
      </div>
    </div>
    {% endif %}

<script>
const TICKET_ID    = {{ ticket.id }};
const CURRENT_UID  = {{ current_user.id }};
const IS_IT_STAFF  = {{ 'true' if current_user.is_it_staff else 'false' }};
const DELETE_URLS  = {};  // populated dynamically for new comments
let seenCommentIds = new Set([{% for c in comments %}{{ c.id }},{% endfor %}]);

// ── Join the ticket's socket room ─────────────────────────────────────────────
if (typeof socket !== 'undefined') {
  socket.emit('join_ticket', { ticket_id: TICKET_ID });
  window.addEventListener('beforeunload', () => {
    socket.emit('leave_ticket', { ticket_id: TICKET_ID });
  });

  // ── Real-time: new comment pushed from server ─────────────────────────────
  socket.on('new_comment', function(c) {
    // Ignore if we already rendered this comment (e.g. the author submitted it
    // via AJAX and we already appended it optimistically).
    if (seenCommentIds.has(c.id)) return;
    // Also skip internal notes for non-IT-staff users
    if (c.is_internal && !IS_IT_STAFF) return;
    seenCommentIds.add(c.id);
    appendComment(c);
  });
}

// ── AJAX comment form submit ──────────────────────────────────────────────────
document.getElementById('comment-form').addEventListener('submit', async function(e) {
  e.preventDefault();

  const body = document.getElementById('comment-body').value.trim();
  if (!body) return;

  const btn = document.getElementById('comment-submit-btn');
  const err = document.getElementById('comment-error');
  err.style.display = 'none';
  btn.disabled = true;
  btn.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Posting…';

  const fd = new FormData(this);

  try {
    const resp = await fetch(window.location.pathname, {
      method      : 'POST',
      credentials : 'same-origin',
      body        : fd,
    });

    if (resp.redirected || resp.ok) {
      // Success — clear the form
      document.getElementById('comment-body').value = '';
      const fileInput = this.querySelector('input[type="file"]');
      if (fileInput) fileInput.value = '';
      const internalCb = document.getElementById('is_internal');
      if (internalCb) internalCb.checked = false;
      // The server will push the new comment via socket to all viewers including us.
      // Fetch the latest comments to make sure we have it (handles the case where
      // the socket push arrives before or after the AJAX response).
      await refreshComments();
    } else {
      err.textContent = 'Failed to post comment (HTTP ' + resp.status + '). Please try again.';
      err.style.display = 'block';
    }
  } catch (ex) {
    err.textContent = 'Network error. Please check your connection.';
    err.style.display = 'block';
  } finally {
    btn.disabled = false;
    btn.innerHTML = '<i class="bi bi-send me-2"></i>Post Comment';
  }
});

// ── Refresh comments from server ──────────────────────────────────────────────
async function refreshComments() {
  const btn = document.getElementById('refresh-comments-btn');
  if (btn) { btn.disabled = true; btn.querySelector('i').classList.add('spin'); }

  try {
    const resp = await fetch('/api/tickets/' + TICKET_ID + '/comments', {
      credentials: 'same-origin'
    });
    if (!resp.ok) return;
    const data = await resp.json();
    renderComments(data.comments);
  } catch (_) {
  } finally {
    if (btn) { btn.disabled = false; btn.querySelector('i').classList.remove('spin'); }
  }
}

// ── Render a full comment list from API data ──────────────────────────────────
function renderComments(comments) {
  const list = document.getElementById('comments-list');
  const countEl = document.getElementById('comment-count');

  if (comments.length === 0) {
    list.innerHTML =
      '<div id="no-comments-placeholder" class="p-4 text-center" style="color:var(--muted);font-size:13px;">' +
      '<i class="bi bi-chat" style="font-size:28px;display:block;margin-bottom:8px;"></i>' +
      'No comments yet. Be the first to add an update.</div>';
    seenCommentIds = new Set();
    if (countEl) countEl.textContent = '(0)';
    return;
  }

  // Rebuild only if the set of IDs has changed (avoids unnecessary DOM churn)
  const newIds = new Set(comments.map(c => c.id));
  const changed = comments.some(c => !seenCommentIds.has(c.id)) ||
                  [...seenCommentIds].some(id => !newIds.has(id));
  if (!changed) return;

  list.innerHTML = '';
  seenCommentIds = new Set();
  comments.forEach(c => {
    seenCommentIds.add(c.id);
    list.appendChild(buildCommentEl(c));
  });
  if (countEl) countEl.textContent = '(' + comments.length + ')';
}

// ── Append a single new comment (from socket push) ────────────────────────────
function appendComment(c) {
  const placeholder = document.getElementById('no-comments-placeholder');
  if (placeholder) placeholder.remove();

  const list = document.getElementById('comments-list');
  list.appendChild(buildCommentEl(c));

  const countEl = document.getElementById('comment-count');
  if (countEl) {
    const n = parseInt(countEl.textContent.replace(/\D/g, '')) || 0;
    countEl.textContent = '(' + (n + 1) + ')';
  }

  // Scroll new comment into view smoothly
  const el = document.getElementById('comment-' + c.id);
  if (el) el.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
}

// ── Build a comment DOM element from API data ─────────────────────────────────
function buildCommentEl(c) {
  const wrap = document.createElement('div');
  wrap.className = 'comment-card' + (c.is_internal ? ' internal' : '');
  wrap.id = 'comment-' + c.id;

  const itBadge = c.is_it_staff
    ? '<span style="font-size:10px;background:rgba(0,180,216,.15);color:var(--accent3);padding:1px 7px;border-radius:4px;font-weight:600;">IT STAFF</span>'
    : '';
  const intBadge = c.is_internal
    ? '<span style="font-size:10px;background:rgba(251,191,36,.15);color:var(--warning);padding:1px 7px;border-radius:4px;font-weight:600;">INTERNAL NOTE</span>'
    : '';
  const deleteBtn = c.can_delete
    ? `<form method="POST" action="/comments/${c.id}/delete" onsubmit="return confirm('Delete this comment?');" style="margin:0;">
         <input type="hidden" name="csrf_token" value="${document.querySelector('meta[name=csrf-token]').content}"/>
         <button type="submit" class="btn btn-sm" style="background:none;border:none;color:var(--muted);padding:2px 6px;" title="Delete comment">
           <i class="bi bi-trash"></i>
         </button>
       </form>`
    : '';
  const atts = (c.attachments || []).map(a =>
    `<a href="/attachments/${a.id}" class="btn btn-secondary btn-sm">
       <i class="bi bi-download me-1"></i>${a.filename}
     </a>`
  ).join('');

  wrap.innerHTML = `
    <div class="d-flex align-items-center justify-content-between mb-2">
      <div class="d-flex align-items-center gap-2">
        <div style="width:28px;height:28px;border-radius:50%;background:var(--accent2);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;">
          ${c.author_init}
        </div>
        <span class="comment-author">${c.author_name}</span>
        ${itBadge}${intBadge}
      </div>
      <div class="d-flex align-items-center gap-2">
        <span class="comment-time">${c.created_at}</span>
        ${deleteBtn}
      </div>
    </div>
    <div class="comment-body">${c.body}</div>
    ${atts ? '<div class="mt-2 d-flex flex-wrap gap-2">' + atts + '</div>' : ''}
  `;
  return wrap;
}
</script>

<style>
@keyframes spin { to { transform: rotate(360deg); } }
.spin { animation: spin .6s linear infinite; display: inline-block; }
</style>
  </div>

  <!-- Sidebar column -->
  <div class="col-lg-4">

    <!-- IT Update Panel -->
    {% if current_user.is_it_staff %}
    <div class="card mb-3">
      <div class="card-header"><i class="bi bi-pencil-square me-2"></i>Update Ticket</div>
      <div class="card-body">
        <form method="POST" action="{{ url_for('tickets.update_ticket', ticket_id=ticket.id) }}">
          <input type="hidden" name="csrf_token" value="{{ csrf_token() }}"/>
          <div class="mb-3">
            <label class="form-label">Status</label>
            <select class="form-select" name="status">
              {% for s in statuses %}
              <option value="{{ s }}" {% if s == ticket.status %}selected{% endif %}>{{ s.replace('_',' ').title() }}</option>
              {% endfor %}
            </select>
          </div>
          <div class="mb-3">
            <label class="form-label">Priority</label>
            <select class="form-select" name="priority">
              {% for p in priorities %}
              <option value="{{ p }}" {% if p == ticket.priority %}selected{% endif %}>{{ p.title() }}</option>
              {% endfor %}
            </select>
          </div>
          <div class="mb-3">
            <label class="form-label">Assign To</label>
            <select class="form-select" name="assigned_to_id">
              <option value="">— Unassigned —</option>
              {% for staff in it_staff %}
              <option value="{{ staff.id }}" {% if ticket.assigned_to_id == staff.id %}selected{% endif %}>
                {{ staff.full_name }}
              </option>
              {% endfor %}
            </select>
          </div>
          <div class="mb-3">
            <label class="form-label">Due Date</label>
            <input type="date" class="form-control" name="due_date"
                   value="{{ ticket.due_date.strftime('%Y-%m-%d') if ticket.due_date else '' }}"/>
          </div>
          <div class="mb-3">
            <label class="form-label">Resolution Notes</label>
            <textarea class="form-control" name="resolution_notes" rows="3"
                      placeholder="Describe how the issue was resolved…">{{ ticket.resolution_notes or '' }}</textarea>
          </div>
          <div class="mb-3">
            <label class="form-label">Internal Notes <span style="color:var(--warning);">(IT only)</span></label>
            <textarea class="form-control" name="internal_notes" rows="2"
                      placeholder="Private notes for IT team…">{{ ticket.internal_notes or '' }}</textarea>
          </div>
          <button type="submit" class="btn btn-primary w-100">
            <i class="bi bi-check2 me-2"></i>Save Changes
          </button>
        </form>
      </div>
    </div>
    {% endif %}

    <!-- Ticket Info -->
    <div class="card mb-3">
      <div class="card-header"><i class="bi bi-info-circle me-2"></i>Ticket Details</div>
      <div class="card-body" style="font-size:13px;">
        {% macro info_row(icon, label, value) %}
        <div style="display:flex;gap:10px;padding:7px 0;border-bottom:1px solid var(--border);">
          <i class="bi {{ icon }}" style="color:var(--muted);width:16px;text-align:center;margin-top:1px;flex-shrink:0;"></i>
          <div style="color:var(--muted);">{{ label }}</div>
          <div style="margin-left:auto;text-align:right;max-width:55%;">{{ value | safe }}</div>
        </div>
        {% endmacro %}
        {{ info_row('bi-hash', 'Number', '<span class="mono" style="font-size:11px;color:var(--accent3);">'~ticket.ticket_number~'</span>') }}
        {{ info_row('bi-tag', 'Category', ticket.category.replace('_',' ').title()) }}
        {{ info_row('bi-person', 'Submitted by', ticket.creator.full_name) }}
        {{ info_row('bi-person-check', 'Assigned to', ticket.assignee.full_name if ticket.assignee else '—') }}
        {{ info_row('bi-calendar3', 'Created', ticket.created_at.strftime('%b %d, %Y')) }}
        {{ info_row('bi-calendar-check', 'Updated', ticket.updated_at.strftime('%b %d, %Y')) }}
        {% if ticket.due_date %}{{ info_row('bi-alarm', 'Due Date', ticket.due_date.strftime('%b %d, %Y')) }}{% endif %}
        {% if ticket.resolved_at %}{{ info_row('bi-check-circle', 'Resolved', ticket.resolved_at.strftime('%b %d, %Y')) }}{% endif %}
      </div>
    </div>

    <!-- History -->
    {% if history %}
    <div class="card">
      <div class="card-header"><i class="bi bi-clock-history me-2"></i>Change History</div>
      <div class="card-body p-2">
        {% for h in history %}
        <div class="history-item">
          {# ── Field label ── #}
          {% if h.field_name == 'assigned_to' %}
            <strong>Assigned To</strong>
          {% elif h.field_name == 'status' %}
            <strong>Status</strong>
          {% elif h.field_name == 'priority' %}
            <strong>Priority</strong>
          {% else %}
            <strong>{{ h.field_name.replace('_',' ').title() }}</strong>
          {% endif %}

          {# ── Values — format status/priority nicely; keep others as-is ── #}
          {% set old = h.old_value or 'Unassigned' %}
          {% set new = h.new_value or 'Unassigned' %}
          {% if h.field_name in ('status', 'priority') %}
            {% set old = old.replace('_',' ').title() %}
            {% set new = new.replace('_',' ').title() %}
          {% endif %}
          changed from <em>{{ old }}</em> to <em>{{ new }}</em>
          <br>
          <span style="font-size:10px;">by {{ h.changer.full_name }} · {{ h.changed_at.strftime('%b %d %H:%M') }}</span>
        </div>
        {% endfor %}
      </div>
    </div>
    {% endif %}
  </div>
</div>
{% endblock %}