// Fristen-Radar 30/60/90
// Quelle: widget.query("portfolio.projects") — seitenweise über die volle Menge.
// Abgeschlossene Projekte (mit Ist-Ende) bleiben außen vor.

const isDark: boolean = widget.data.theme === "dark";
const C = {
  text: isDark ? "#f1f5f9" : "#1e293b",
  sub: "#94a3b8",
  card: isDark ? "#1e293b" : "#f8fafc",
  line: isDark ? "#334155" : "#e2e8f0",
  green: "#22c55e",
  amber: "#f59e0b",
  red: "#ef4444",
};

const DAY = 86400000;
const MAX_PAGES = 3;

function esc(s: string): string {
  return String(s).replace(/[&<>"]/g, (c: string) =>
    c === "&" ? "&amp;" : c === "<" ? "&lt;" : c === ">" ? "&gt;" : "&quot;");
}

function note(text: string): string {
  return `<div style="display:flex;align-items:center;justify-content:center;height:100%;min-height:60px;padding:12px;font-size:12px;color:${C.sub};text-align:center">${text}</div>`;
}

/** "YYYY-MM-DD" als LOKALE Mitternacht lesen. Date.parse würde reine
 *  Datumsangaben als UTC interpretieren — Tagesdifferenzen kippen dann je
 *  nach Zeitzone um einen Tag. */
function dayStart(iso: string): number {
  const m = /^(\d{4})-(\d{2})-(\d{2})/.exec(iso || "");
  return m ? new Date(Number(m[1]), Number(m[2]) - 1, Number(m[3])).getTime() : NaN;
}

function today0(): number {
  const d = new Date();
  d.setHours(0, 0, 0, 0);
  return d.getTime();
}

function daysLeft(iso: string): number | null {
  const t: number = dayStart(iso);
  if (Number.isNaN(t)) return null;
  return Math.round((t - today0()) / DAY);
}

/** Lädt bis zu MAX_PAGES Seiten à 200 Projekte über den Cursor. */
async function loadProjects() {
  const items: WidgetPortfolioProject[] = [];
  let cursor: string | undefined = undefined;
  let total: number | null = null;
  for (let page = 0; page < MAX_PAGES; page++) {
    const res = await widget.query("portfolio.projects", { limit: 200, cursor: cursor });
    if (!res.ok) return { error: res.error.code, items: items, total: total, complete: false };
    if (total === null) total = res.data.total;
    res.data.items.forEach((p) => items.push(p));
    if (!res.data.nextCursor) return { error: null, items: items, total: total, complete: true };
    cursor = res.data.nextCursor;
  }
  return { error: null, items: items, total: total, complete: false };
}

widget.el.innerHTML = note("Lade Projekttermine …");

(async () => {
  const loaded = await loadProjects();
  if (loaded.error) {
    widget.el.innerHTML = note(
      loaded.error === "forbidden" ? "Keine Berechtigung für die Portfoliodaten."
        : loaded.error === "unsupported_in_context" ? "Nur auf Portfolioebene verfügbar."
        : "Projekte konnten nicht geladen werden.",
    );
    widget.done();
    return;
  }

  const running = loaded.items.filter((p) => !p.actualEnd || p.actualEnd === "");
  const withDays = running
    .map((p) => ({ p: p, d: daysLeft(p.planEnd) }))
    .filter((x) => x.d !== null) as { p: WidgetPortfolioProject; d: number }[];

  const buckets = [
    { label: "überfällig", color: C.red, hit: (d: number) => d < 0 },
    { label: "≤ 30 Tage", color: C.amber, hit: (d: number) => d >= 0 && d <= 30 },
    { label: "31–60 Tage", color: C.green, hit: (d: number) => d > 30 && d <= 60 },
    { label: "61–90 Tage", color: C.sub, hit: (d: number) => d > 60 && d <= 90 },
  ];

  const tiles: string = buckets.map((b) => {
    const hits = withDays.filter((x) => b.hit(x.d));
    const critical = hits.filter((x) => x.p.progress < 80).length;
    return `<div style="flex:1;background:${C.card};border-radius:8px;padding:8px 10px;min-width:0;border-top:2px solid ${b.color}">
      <div style="font-size:20px;font-weight:700;color:${hits.length > 0 ? b.color : C.sub}">${hits.length}</div>
      <div style="font-size:10px;color:${C.sub}">${b.label}</div>
      <div style="font-size:9px;color:${critical > 0 ? C.red : C.sub}">${critical} unter 80 %</div>
    </div>`;
  }).join("");

  const soon = withDays
    .filter((x) => x.d <= 90)
    .sort((a, b) => a.d - b.d)
    .slice(0, 7);

  const rows: string = soon.map((x) => {
    const color: string = x.d < 0 ? C.red : x.d <= 30 ? C.amber : C.sub;
    const pct: number = Math.min(Math.max(x.p.progress, 0), 100);
    const barColor: string = pct >= 80 ? C.green : pct >= 50 ? C.amber : C.red;
    return `<div style="display:flex;align-items:center;gap:8px;padding:5px 0;border-bottom:1px solid ${C.line};font-size:11px">
      <span style="flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:${C.text}">${esc(x.p.name)}</span>
      <span style="width:52px;flex-shrink:0;height:5px;background:${C.line};border-radius:3px;overflow:hidden">
        <span style="display:block;height:100%;width:${pct}%;background:${barColor}"></span>
      </span>
      <span style="width:32px;flex-shrink:0;text-align:right;color:${C.sub};font-variant-numeric:tabular-nums">${pct}%</span>
      <span style="min-width:70px;text-align:right;color:${color};font-weight:600;white-space:nowrap">${x.d < 0 ? Math.abs(x.d) + " T. über" : "in " + x.d + " T."}</span>
    </div>`;
  }).join("");

  widget.el.innerHTML = `
    <div style="padding:10px 12px;color:${C.text}">
      <div style="display:flex;gap:6px;margin-bottom:10px">${tiles}</div>
      ${soon.length === 0
        ? note("In den nächsten 90 Tagen endet planmäßig kein Projekt.")
        : `<div style="font-size:10px;color:${C.sub};text-transform:uppercase;letter-spacing:.04em;margin-bottom:4px">Nächste Endtermine</div>${rows}`}
      ${!loaded.complete ? `<div style="font-size:10px;color:${C.sub};margin-top:6px">Auswertung über ${loaded.items.length} von ${loaded.total ?? "?"} Projekten.</div>` : ""}
    </div>`;
  widget.done();
})();