/**
 * Risk Radar — customer portfolio risk view.
 */

const container = document.querySelector('.app-details-container[data-risk-radar-url]');
if (container) {
  const dataUrl = container.dataset.riskRadarUrl;
  const debitorBaseUrl = container.dataset.debitorBaseUrl || '';
  const d = (key, fallback) => container.dataset[key] || fallback;

  const elLoading = document.getElementById('radar-loading');
  const elError = document.getElementById('radar-error');
  const elEmpty = document.getElementById('radar-empty');
  const elTruncated = document.getElementById('radar-truncated');
  const elContent = document.getElementById('radar-content');
  const elCards = document.getElementById('radar-cards');
  const elRefresh = container.querySelector('button[name="radar-refresh"]');
  const periodSelector = document.getElementById('radar-period-selector');
  const searchInput = document.getElementById('radar-search');
  const dialog = document.getElementById('radar-detail-dialog');
  const dialogTitle = document.getElementById('radar-detail-title');
  const dialogBody = document.getElementById('radar-detail-body');
  const dialogClose = dialog ? dialog.querySelector('.app-dialog-close') : null;

  let currentPeriod = 90;
  let lastData = null;

  function showState(state) {
    if (elLoading) elLoading.hidden = state !== 'loading';
    if (elError) elError.hidden = state !== 'error';
    if (elEmpty) elEmpty.hidden = state !== 'empty';
    if (elContent) elContent.hidden = state !== 'success';
  }

  function setText(id, value) {
    const el = document.getElementById(id);
    if (el) el.textContent = value;
  }

  function h(tag, cls, text) {
    const e = document.createElement(tag);
    if (cls) e.className = cls;
    if (text !== undefined) e.textContent = text;
    return e;
  }

  function levelClass(level) {
    return 'helpdesk-risk-level-' + level;
  }

  function formatAge(hours) {
    if (hours < 24) return hours + 'h';
    return Math.floor(hours / 24) + 'd';
  }

  /**
   * Dimension label lookup from data attributes.
   */
  function dimLabel(id) {
    const map = {
      'open_pressure': d('labelOpenPressure', 'Open pressure'),
      'trend': d('labelTrend', 'Trend'),
      'sla_overdue': d('labelSla', 'SLA overdue'),
      'resolution': d('labelResolution', 'Resolution time'),
      'inactivity': d('labelInactivity', 'Inactivity'),
    };
    return map[id] || id;
  }

  /**
   * Build a single customer risk card.
   */
  function buildCard(customer) {
    const card = h('article', 'helpdesk-risk-card ' + levelClass(customer.risk_level));
    card.setAttribute('aria-label', customer.customer_name || customer.customer_no);

    // Header: name + score badge
    const header = h('div', 'helpdesk-risk-card-header');
    const nameEl = h('span', 'helpdesk-risk-card-name', customer.customer_name || customer.customer_no);
    const scoreBadge = h('span', 'helpdesk-risk-card-score ' + levelClass(customer.risk_level), String(customer.risk_score));
    scoreBadge.setAttribute('aria-label', d('labelScore', 'Risk score') + ': ' + customer.risk_score);
    header.appendChild(nameEl);
    header.appendChild(scoreBadge);
    card.appendChild(header);

    // Core metrics row
    const metrics = h('div', 'helpdesk-risk-card-metrics');
    const kpis = customer.kpis || {};

    if (kpis.sla_overdue > 0) {
      const m = h('span', 'helpdesk-risk-card-metric helpdesk-risk-card-metric-warn');
      m.textContent = kpis.sla_overdue + ' ' + d('labelOverdue', 'overdue');
      metrics.appendChild(m);
    }
    if (kpis.critical > 0) {
      const m = h('span', 'helpdesk-risk-card-metric helpdesk-risk-card-metric-warn');
      m.textContent = kpis.critical + ' ' + d('labelCritical', 'critical');
      metrics.appendChild(m);
    }
    const openM = h('span', 'helpdesk-risk-card-metric');
    openM.textContent = kpis.open + ' ' + d('labelOpen', 'open');
    metrics.appendChild(openM);

    if (kpis.net_flow !== 0) {
      const flowM = h('span', 'helpdesk-risk-card-metric');
      flowM.textContent = (kpis.net_flow > 0 ? '+' : '') + kpis.net_flow + ' ' + d('labelNet', 'net');
      if (kpis.net_flow > 0) flowM.classList.add('helpdesk-risk-card-metric-warn');
      metrics.appendChild(flowM);
    }

    card.appendChild(metrics);

    // Top drivers
    const drivers = customer.drivers || [];
    if (drivers.length > 0) {
      const driverSection = h('div', 'helpdesk-risk-card-drivers');
      for (const dr of drivers) {
        if (dr.dimension_score === null || dr.weighted_points <= 0) continue;
        const row = h('div', 'helpdesk-risk-card-driver');
        row.appendChild(h('span', 'helpdesk-risk-card-driver-label', dimLabel(dr.id)));
        const bar = h('div', 'helpdesk-risk-card-driver-bar');
        const fill = h('div', 'helpdesk-risk-card-driver-fill');
        fill.style.width = Math.min(100, dr.dimension_score) + '%';
        bar.appendChild(fill);
        row.appendChild(bar);
        driverSection.appendChild(row);
      }
      card.appendChild(driverSection);
    }

    // Click/keyboard to open detail
    card.tabIndex = 0;
    card.setAttribute('role', 'button');
    card.addEventListener('click', () => openDetail(customer));
    card.addEventListener('keydown', (e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); openDetail(customer); } });

    return card;
  }

  /**
   * Open detail dialog for a customer.
   */
  function openDetail(customer) {
    if (!dialog || !dialogTitle || !dialogBody) return;

    dialogTitle.textContent = (customer.customer_name || customer.customer_no) + ' — ' + customer.risk_score + '/100';
    dialogBody.replaceChildren();

    // All 5 dimensions
    const dims = customer.dimensions || [];
    const dimSection = h('div', 'helpdesk-risk-detail-dimensions');
    for (const dim of dims) {
      const row = h('div', 'helpdesk-risk-detail-dim');
      row.appendChild(h('span', 'helpdesk-risk-detail-dim-label', dimLabel(dim.id)));
      const bar = h('div', 'helpdesk-risk-card-driver-bar');
      const fill = h('div', 'helpdesk-risk-card-driver-fill');
      fill.style.width = (dim.dimension_score !== null ? Math.min(100, dim.dimension_score) : 0) + '%';
      bar.appendChild(fill);
      row.appendChild(bar);
      const val = h('span', 'helpdesk-risk-detail-dim-value');
      val.textContent = dim.dimension_score !== null ? dim.dimension_score + '/100' : '—';
      row.appendChild(val);
      dimSection.appendChild(row);
    }
    dialogBody.appendChild(dimSection);

    // Open tickets list
    const tickets = customer.open_tickets || [];
    if (tickets.length > 0) {
      dialogBody.appendChild(h('h3', 'helpdesk-support-section-title', d('labelTickets', 'Tickets') + ' (' + tickets.length + ')'));
      const table = h('table', 'helpdesk-risk-detail-tickets');
      const thead = h('thead');
      const headRow = h('tr');
      headRow.appendChild(h('th', '', d('labelTicket', 'Ticket')));
      headRow.appendChild(h('th', '', d('labelSla', 'SLA')));
      headRow.appendChild(h('th', '', d('labelStatus', 'Status')));
      headRow.appendChild(h('th', '', d('labelAge', 'Age')));
      thead.appendChild(headRow);
      table.appendChild(thead);
      const tbody = h('tbody');
      for (const t of tickets) {
        const tr = h('tr', t.age_hours > 48 ? 'helpdesk-risk-detail-ticket-critical' : '');
        tr.appendChild(h('td', '', t.no));
        tr.appendChild(h('td', '', t.escalation_code || '—'));
        tr.appendChild(h('td', '', t.state));
        tr.appendChild(h('td', '', formatAge(t.age_hours)));
        tbody.appendChild(tr);
      }
      table.appendChild(tbody);
      dialogBody.appendChild(table);
    }

    // Link to debitor
    if (debitorBaseUrl && customer.customer_no) {
      const link = h('a', 'helpdesk-risk-detail-link', customer.customer_name || customer.customer_no);
      link.href = debitorBaseUrl + encodeURIComponent(customer.customer_no);
      link.target = '_blank';
      link.rel = 'noopener noreferrer';
      dialogBody.appendChild(link);
    }

    dialog.showModal();
  }

  // Dialog close handlers
  if (dialogClose) dialogClose.addEventListener('click', () => dialog.close());
  if (dialog) dialog.addEventListener('click', (e) => { if (e.target === dialog) dialog.close(); });

  function renderKpis(summary) {
    setText('radar-kpi-total', summary.total ?? 0);
    setText('radar-kpi-high', summary.high ?? 0);
    setText('radar-kpi-medium', summary.medium ?? 0);
    setText('radar-kpi-low', summary.low ?? 0);
  }

  function renderCards(customers) {
    if (!elCards) return;
    elCards.replaceChildren();
    for (const c of customers) elCards.appendChild(buildCard(c));
  }

  function filterCards(query) {
    if (!lastData) return;
    const q = query.toLowerCase().trim();
    const filtered = q === ''
      ? lastData.customers
      : lastData.customers.filter(c => (c.customer_name || '').toLowerCase().includes(q) || c.customer_no.toLowerCase().includes(q));
    renderCards(filtered);
  }

  async function fetchData(refresh = false) {
    showState('loading');
    if (elTruncated) elTruncated.hidden = true;

    const params = new URLSearchParams({ periodDays: String(currentPeriod) });
    if (refresh) params.set('refresh', '1');

    try {
      const res = await fetch(dataUrl + '?' + params.toString(), { credentials: 'same-origin' });
      const json = await res.json();

      if (!json.ok) { showState('error'); return; }
      if (!json.customers || json.customers.length === 0) { showState('empty'); return; }

      lastData = json;
      renderKpis(json.summary);
      renderCards(json.customers);
      showState('success');

      if (json.meta && json.meta.truncated && elTruncated) {
        elTruncated.hidden = false;
      }
    } catch {
      showState('error');
    }
  }

  if (periodSelector) {
    periodSelector.addEventListener('change', (e) => {
      const radio = e.target.closest('input[name="radar-period"]');
      if (!radio) return;
      const period = parseInt(radio.value, 10);
      if (!period || period === currentPeriod) return;
      currentPeriod = period;
      fetchData();
    });
  }

  if (searchInput) {
    searchInput.addEventListener('input', () => filterCards(searchInput.value));
  }

  if (elRefresh) {
    elRefresh.addEventListener('click', () => fetchData(true));
  }

  fetchData();
}