import { describe, expect, it } from "vitest";
import { parseModuleSchemaMetadataDefinition } from "../src/index.js";

describe("module schema metadata contract", () => {
  it("accepts and freezes plain ABI-v1 metadata", () => {
    const definition = parseModuleSchemaMetadataDefinition({
      moduleId: "calendar",
      tables: [
        { name: "calendar_events" },
        { name: "calendar_attendees", foreignKeys: [{ table: "calendar_events" }] },
      ],
    });

    expect(definition).toEqual({
      moduleId: "calendar",
      tables: [
        { name: "calendar_events", foreignKeys: [] },
        { name: "calendar_attendees", foreignKeys: [{ table: "calendar_events" }] },
      ],
    });
    expect(Object.isFrozen(definition)).toBe(true);
    expect(Object.isFrozen(definition.tables)).toBe(true);
    expect(Object.isFrozen(definition.tables[1]?.foreignKeys)).toBe(true);
  });

  it("strictly rejects malformed, executable, and class-backed metadata", () => {
    class Metadata {
      moduleId = "calendar";
      tables = [{ name: "calendar_events" }];
    }

    for (const value of [
      { moduleId: "calendar", tables: [] },
      { moduleId: "calendar", tables: [{ name: "calendar_events", unknown: true }] },
      { moduleId: "calendar", tables: [{ name: "calendar_events", foreignKeys: [{}] }] },
      { moduleId: "calendar", tables: [{ name: "calendar_events", inspect: () => undefined }] },
      new Metadata(),
    ]) {
      expect(() => parseModuleSchemaMetadataDefinition(value)).toThrow(
        "Invalid Ekklesia module schema metadata definition.",
      );
    }
  });
});