// Phase 7 helpers the close panel, the print menu and the tabs share: opening PDFs, the print rows, the kiosk
// code, the VISUAL observed line.
import { packetsApi } from "../api/packets";
import type { PacketRead, PrintKind, PrintRow, VcloseCheck, WorkOrder } from "../api/types";
import { fmtTime } from "../lib/format";
import { printPdf } from "../lib/printPdf";

/** The rule's signature meanings for FILE and ADMIN_REOPEN. */
export const SIGN_FILE = "File in the data book";
export const SIGN_REOPEN = "Reopen a filed packet";

/** Opens a PDF (or any server URL) in a new tab, to view it. Prints do not come here (change C4). */
export function openTab(url: string): void {
  window.open(url, "_blank", "noopener");
}

/** The short error when a print cannot be made. */
export const PRINT_FAILED = "The print could not be made. Try again.";

type PrintErrorListener = (text: string) => void;
const printErrorListeners = new Set<PrintErrorListener>();

/** The packet page listens here to show a failed print. Returns the unsubscribe. */
export function onPrintError(fn: PrintErrorListener): () => void {
  printErrorListeners.add(fn);
  return () => {
    printErrorListeners.delete(fn);
  };
}

/**
 * Prints a stamped copy of one kind straight to the browser's print dialog (change C4). The server stamps it and
 * records the print when the PDF is fetched. A failure goes to the onPrintError listeners.
 */
export function openPrint(id: number, kind: PrintKind, opts: { sheet?: number | undefined; asset?: string | undefined } = {}): void {
  void printPdf(packetsApi.printUrl(id, kind, opts)).catch(() => {
    for (const fn of printErrorListeners) fn(PRINT_FAILED);
  });
}

/** The asset id of a "/_blob/<id>" URL, for documents whose answer has no asset_id. */
export function assetOfUrl(url: string): string | undefined {
  const m = /\/_blob\/([^/?#]+)/.exec(url);
  return m?.[1] ? decodeURIComponent(m[1]) : undefined;
}

export interface PrintRowDef {
  kind: Exclude<PrintKind, "doc">;
  label: string;
  desc: string;
}

/** The rows of the print menu for this packet, as the old openPrintMenu. */
export function printRows(p: PacketRead): PrintRowDef[] {
  const drawings = p.pages.filter((x) => x.type === "drawing");
  const live = drawings.filter((x) => !x.void).length;
  const voids = drawings.filter((x) => !!x.void).length;
  const one = live === 1;
  const rows: PrintRowDef[] = [
    {
      kind: "traveler",
      label: "Job traveler",
      desc: "Job info, work order QR codes for clocking on, BOM and heat numbers, checklist with blanks to stamp, welds, sign-offs, notes",
    },
    { kind: "map-h", label: "Drawing with heat map", desc: one ? "The drawing with its heat table" : `All ${live} drawing sheets with heat tables` },
    { kind: "map-w", label: "Drawing with weld map", desc: one ? "The drawing with weld locations" : `All ${live} drawing sheets with weld locations` },
    { kind: "clean", label: "Drawing (no markup)", desc: "The approved drawing without markup" },
  ];
  if (voids) {
    rows.push({
      kind: "void",
      label: "Superseded drawings (VOID)",
      desc: `${voids} replaced drawing sheet${voids === 1 ? "" : "s"} with their weld marks, stamped VOID`,
    });
  }
  if (p.status === "complete" || p.status === "filed") {
    rows.push({ kind: "databook", label: "Data book", desc: "The full manufacturing data book (same as the PDF export)" });
  }
  return rows;
}

/**
 * The labor kiosk code of a work order, as the old qrText: `*%2{wo}${lot}${split}${sub}${seq}%*`. The columns stay
 * text (never cast); an empty split or sub is "0".
 */
export function kioskCode(w: Pick<WorkOrder, "wo_base" | "lot" | "split" | "sub" | "seq">): string {
  const seq = w.seq === null || w.seq === undefined ? "" : String(w.seq);
  return `*%2${w.wo_base}$${w.lot}$${w.split || "0"}$${w.sub || "0"}$${seq}%*`;
}

/** "{date} · {what} · {pages} pages · {name}". */
export function printLineText(r: PrintRow): string {
  const pages = r.pages === null || r.pages === undefined ? null : `${r.pages} page${r.pages === 1 ? "" : "s"}`;
  return [fmtTime(r.at), r.what, pages, r.by?.display_name ?? null].filter((x): x is string => !!x).join(" · ");
}

/** The VISUAL observed state as one line, or null when there is nothing to say (a hand packet). */
export function visualLine(c: VcloseCheck | null | undefined): string | null {
  if (!c) return null;
  const open = c.open_wos ?? [];
  if (c.closed_at) return `VISUAL shows the job closed since ${fmtTime(c.closed_at)}.`;
  if (open.length) return `VISUAL still shows ${open.length} work order${open.length === 1 ? "" : "s"} open: ${open.join(", ")}.`;
  if (!c.observed_at) return "The feed has not checked VISUAL yet.";
  return null;
}

/**
 * True when the close and file panel shows for this packet and user: filed (read-only for everyone), or complete for
 * whoever may close, file or reopen, and for everyone after a reopen (the broken seal line).
 */
export function showsCloseFile(p: PacketRead): boolean {
  if (p.removed) return false;
  if (p.status === "filed") return true;
  if (p.status !== "complete") return false;
  return !!p.seal?.broken_at || p.can.includes("set_vclosed") || p.can.includes("file") || !!p.blocked.file || p.can.includes("admin_reopen");
}