import { existsSync } from "node:fs";
import path from "node:path";
import { describe, expect, it } from "vitest";
import { catalogEntry, FAMILY_LABELS, TEMPLATE_CATALOG } from "./catalog";
import { TEMPLATES } from "./registry";

describe("template catalog", () => {
  it("has one entry per registered template, in the registry's order, ids unique", () => {
    expect(TEMPLATE_CATALOG.map((e) => e.id)).toEqual(Object.keys(TEMPLATES));
    expect(new Set(TEMPLATE_CATALOG.map((e) => e.id)).size).toBe(TEMPLATE_CATALOG.length);
    expect(TEMPLATE_CATALOG).toHaveLength(14);
  });

  it("groups the C4 templates into the Ledger and Band families", () => {
    const byFamily = (f: string) => TEMPLATE_CATALOG.filter((e) => e.family === f).map((e) => e.id);
    expect(byFamily("ledger")).toEqual(["crimson-grid", "tangerine-ledger"]);
    expect(byFamily("band")).toEqual(["slate-band", "teal-swoosh"]);
    expect(byFamily("neutral")).toEqual(["linea", "monogram", "serenity"]);
    expect(FAMILY_LABELS.ledger).toBe("Ledger");
    expect(FAMILY_LABELS.band).toBe("Band");
  });

  it("lists the standalone templates, Monolith, Cobalt Stripe, Marble and Highlighter, last", () => {
    expect(TEMPLATE_CATALOG.filter((e) => e.family === "standalone").map((e) => e.id)).toEqual(["monolith", "cobalt-stripe", "marble", "highlighter"]);
    expect(FAMILY_LABELS.standalone).toBe("Standalone");
  });

  it("every entry has a name, a family label and a thumbnail on disk; every definition agrees", () => {
    for (const e of TEMPLATE_CATALOG) {
      expect(e.name.length, e.id).toBeGreaterThan(0);
      expect(FAMILY_LABELS[e.family], e.id).toBeTruthy();
      expect(e.thumbnail).toBe(`/templates/${e.id}.png`);
      expect(existsSync(path.join(process.cwd(), "public", e.thumbnail)), e.thumbnail).toBe(true);
      expect(TEMPLATES[e.id].family).toBe(e.family);
      expect(TEMPLATES[e.id].name).toBe(e.name);
    }
  });

  it("falls back to Classic for an unknown id", () => {
    expect(catalogEntry("no-such").id).toBe("classic");
    expect(catalogEntry("slate-band").name).toBe("Slate Band");
  });
});