// Portfolio-Zeitstrahl
// Quelle: widget.query("portfolio.projects")
// Zeitfenster: 3 Monate zurück bis 12 Monate voraus; Balken werden am
// Fensterrand abgeschnitten und mit einem Pfeil markiert.

const MONTHS_BACK = 3;
const MONTHS_AHEAD = 12;
const MAX_ROWS = 18;

const isDark: boolean = widget.data.theme === "dark";
const C = {
  text: isDark ? "#f1f5f9" : "#1e293b",
  sub: "#94a3b8",
  line: isDark ? "#334155" : "#e2e8f0",
  track: isDark ? "#1e293b" : "#f1f5f9",
  green: "#22c55e",
  amber: "#f59e0b",
  red: "#ef4444",
  blue: "#3b82f6",
};

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>`;
}

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("Baue Zeitstrahl …");

(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 now = new Date();
  const from = new Date(now.getFullYear(), now.getMonth() - MONTHS_BACK, 1).getTime();
  const to = new Date(now.getFullYear(), now.getMonth() + MONTHS_AHEAD, 1).getTime();
  const span: number = to - from;

  function pos(t: number): number {
    return Math.min(Math.max((t - from) / span, 0), 1) * 100;
  }

  const rows = loaded.items
    .filter((p) => !p.actualEnd || p.actualEnd === "")
    .map((p) => ({ p: p, s: Date.parse(p.planStart), e: Date.parse(p.planEnd) }))
    .filter((r) => !Number.isNaN(r.s) && !Number.isNaN(r.e) && r.e >= from && r.s <= to)
    .sort((a, b) => a.s - b.s);

  if (rows.length === 0) {
    widget.el.innerHTML = note("Keine laufenden Projekte im Zeitfenster.");
    widget.done();
    return;
  }

  // Monatsraster (Beschriftung nur zum Quartalsanfang, sonst wird es eng).
  let grid = "";
  let labels = "";
  for (let m = -MONTHS_BACK; m <= MONTHS_AHEAD; m++) {
    const d = new Date(now.getFullYear(), now.getMonth() + m, 1);
    const x: number = pos(d.getTime());
    grid += `<div style="position:absolute;left:${x.toFixed(2)}%;top:0;bottom:0;width:1px;background:${C.line}"></div>`;
    if (d.getMonth() % 3 === 0) {
      labels += `<span style="position:absolute;left:${x.toFixed(2)}%;transform:translateX(-50%);font-size:9px;color:${C.sub};white-space:nowrap">${d.toLocaleDateString(navigator.language, { month: "short", year: "2-digit" })}</span>`;
    }
  }
  const todayX: number = pos(now.getTime());

  function barColor(p: WidgetPortfolioProject): string {
    if (p.termin === "red") return C.red;
    if (p.termin === "yellow") return C.amber;
    if (p.termin === "green") return C.green;
    return C.blue;
  }

  const bars: string = rows.slice(0, MAX_ROWS).map((r) => {
    const left: number = pos(r.s);
    const right: number = pos(r.e);
    const width: number = Math.max(right - left, 0.8);
    const color: string = barColor(r.p);
    const pct: number = Math.min(Math.max(r.p.progress, 0), 100);
    return `<div style="display:flex;align-items:center;gap:6px;height:20px">
      <span style="width:104px;flex-shrink:0;font-size:10px;color:${C.text};overflow:hidden;text-overflow:ellipsis;white-space:nowrap">${esc(r.p.name)}</span>
      <span style="flex:1;position:relative;height:12px;background:${C.track};border-radius:3px;overflow:hidden">
        ${grid}
        <span style="position:absolute;left:${left.toFixed(2)}%;width:${width.toFixed(2)}%;top:2px;height:8px;background:${color};opacity:.35;border-radius:2px"></span>
        <span style="position:absolute;left:${left.toFixed(2)}%;width:${(width * pct / 100).toFixed(2)}%;top:2px;height:8px;background:${color};border-radius:2px"></span>
        <span style="position:absolute;left:${todayX.toFixed(2)}%;top:0;bottom:0;width:1px;background:${C.amber}"></span>
      </span>
    </div>`;
  }).join("");

  widget.el.innerHTML = `
    <div style="padding:8px 12px;color:${C.text}">
      <div style="display:flex;gap:6px;margin-bottom:2px">
        <span style="width:104px;flex-shrink:0"></span>
        <span style="flex:1;position:relative;height:12px">${labels}</span>
      </div>
      ${bars}
      <div style="display:flex;gap:10px;flex-wrap:wrap;font-size:10px;color:${C.sub};margin-top:6px;padding-top:6px;border-top:1px solid ${C.line}">
        <span>${rows.length} laufende Projekte${rows.length > MAX_ROWS ? ` (${MAX_ROWS} dargestellt)` : ""}</span>
        <span>Kräftiger Balkenteil = Fortschritt</span>
        <span>Farbe = Terminampel</span>
      </div>
    </div>`;
  widget.done();
})();