// Leistungswert-Ampel (Earned Value)
// Quelle: widget.query("project.containers")
// Rechenbasis sind ausschließlich Arbeitspakete ohne Unterelemente —
// Elternknoten würden ihre Kinder ein zweites Mal zählen.

const CURRENCY = "EUR"; // an die Mandantenwährung anpassen

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 CUR: string = new Intl.NumberFormat(navigator.language, {
  style: "currency",
  currency: CURRENCY,
}).formatToParts(0).filter((x) => x.type === "currency").map((x) => x.value)[0] || CURRENCY;

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>`;
}

function queryError(code: string): string {
  return note(
    code === "forbidden" ? "Keine Berechtigung für den Strukturplan."
      : code === "unsupported_in_context" ? "Nur auf Projektebene verfügbar."
      : "Daten konnten nicht geladen werden.",
  );
}

function short(v: number): string {
  const a: number = Math.abs(v);
  if (a >= 1000000) return (v / 1000000).toLocaleString(navigator.language, { maximumFractionDigits: 1 }) + " Mio. " + CUR;
  if (a >= 10000) return Math.round(v / 1000).toLocaleString(navigator.language) + " Tsd. " + CUR;
  return Math.round(v).toLocaleString(navigator.language) + " " + CUR;
}

widget.el.innerHTML = note("Berechne Leistungswerte …");

(async () => {
  const res = await widget.query("project.containers", { limit: 500 });
  if (!res.ok) {
    widget.el.innerHTML = queryError(res.error.code);
    widget.done();
    return;
  }

  const work = res.data.items.filter((c) => c.type === "container");
  const leaves = work.filter((c) => c.childrenCount === 0);
  const basis = leaves.length > 0 ? leaves : work;

  if (basis.length === 0) {
    widget.el.innerHTML = note("Kein Strukturplan hinterlegt.");
    widget.done();
    return;
  }

  const now: number = Date.now();
  let bac = 0, ev = 0, pv = 0, ac = 0;
  basis.forEach((c) => {
    const b: number = c.budget != null ? c.budget : (c.costPlan != null ? c.costPlan : 0);
    bac += b;
    ev += b * (c.progress / 100);
    ac += c.costActual != null ? c.costActual : 0;
    const s: number = Date.parse(c.startDate);
    const e: number = Date.parse(c.endDate);
    let frac = 1;
    if (!Number.isNaN(s) && !Number.isNaN(e) && e > s) {
      frac = Math.min(Math.max((now - s) / (e - s), 0), 1);
    } else if (!Number.isNaN(s) && now < s) {
      frac = 0;
    }
    pv += b * frac;
  });

  const spi: number | null = pv > 0 ? ev / pv : null;
  const cpi: number | null = ac > 0 ? ev / ac : null;
  const eac: number = cpi !== null && cpi > 0 ? bac / cpi : bac;

  function tone(v: number | null): string {
    if (v === null) return C.sub;
    if (v >= 0.95) return C.green;
    if (v >= 0.85) return C.amber;
    return C.red;
  }

  function fmt(v: number | null): string {
    return v === null ? "—" : v.toLocaleString(navigator.language, { minimumFractionDigits: 2, maximumFractionDigits: 2 });
  }

  function gauge(label: string, v: number | null, hint: string): string {
    const color: string = tone(v);
    const pct: number = v === null ? 0 : (Math.min(Math.max(v, 0), 1.5) / 1.5) * 100;
    return `<div style="flex:1;background:${C.card};border-radius:8px;padding:10px 12px;min-width:0">
      <div style="font-size:10px;color:${C.sub};text-transform:uppercase;letter-spacing:.04em">${label}</div>
      <div style="font-size:26px;font-weight:700;line-height:1.15;color:${color}">${fmt(v)}</div>
      <div style="height:4px;background:${C.line};border-radius:2px;overflow:hidden;margin:6px 0 5px">
        <div style="height:100%;width:${pct.toFixed(0)}%;background:${color}"></div>
      </div>
      <div style="font-size:10px;color:${C.sub};line-height:1.3">${hint}</div>
    </div>`;
  }

  const spiText: string = spi === null ? "Keine Termindaten"
    : spi >= 1 ? Math.round((spi - 1) * 100) + " % vor Plan"
    : Math.round((1 - spi) * 100) + " % hinter Plan";

  const cpiText: string = cpi === null ? "Noch keine Ist-Kosten"
    : cpi >= 1 ? Math.round((cpi - 1) * 100) + " % günstiger als geplant"
    : Math.round((1 / cpi - 1) * 100) + " % teurer als geplant";

  const abw: number = eac - bac;

  function cell(label: string, value: string, color: string): string {
    return `<div style="flex:1;min-width:0">
      <div style="font-size:12px;font-weight:600;color:${color};white-space:nowrap;overflow:hidden;text-overflow:ellipsis">${value}</div>
      <div style="font-size:10px;color:${C.sub}">${label}</div>
    </div>`;
  }

  widget.el.innerHTML = `
    <div style="padding:10px 12px;color:${C.text}">
      <div style="display:flex;gap:8px;margin-bottom:10px">
        ${gauge("Termin (SPI)", spi, spiText)}
        ${gauge("Kosten (CPI)", cpi, cpiText)}
      </div>
      <div style="display:flex;gap:10px;padding-top:8px;border-top:1px solid ${C.line}">
        ${cell("Gesamtbudget", short(bac), C.text)}
        ${cell("Leistungswert", short(ev), C.text)}
        ${cell("Ist-Kosten", short(ac), C.text)}
        ${cell("Prognose Ende", short(eac), abw > 0 ? C.red : C.green)}
      </div>
      <div style="font-size:10px;color:${C.sub};margin-top:8px;line-height:1.35">
        Basis: ${basis.length} Arbeitspakete. Der Sollwert wird zeitanteilig aus
        Start- und Endterminen gebildet.
      </div>
    </div>`;
  widget.done();
})();