import { describe, expect, it, vi } from "vitest";

const clientConstructor = vi.hoisted(() => vi.fn());

vi.mock("pg", () => ({ Client: clientConstructor }));

import {
  createPostgresMigrationDatabase,
  PostgresMigrationDatabaseError,
} from "../src/migrations/postgres-database.js";

describe("PostgreSQL migration database composition", () => {
  it("does not construct a client or execute SQL merely because the adapter is imported", () => {
    expect(clientConstructor).not.toHaveBeenCalled();
  });

  it.each([
    undefined,
    "",
    "not-a-database-url",
    "https://admin:do-not-log@db.example.test/database",
  ])("rejects missing or invalid configuration without exposing it (%s)", (databaseUrl) => {
    let captured: unknown;
    try {
      createPostgresMigrationDatabase(databaseUrl);
    } catch (error) {
      captured = error;
    }

    expect(captured).toBeInstanceOf(PostgresMigrationDatabaseError);
    expect(captured).toMatchObject({ code: "POSTGRES_MIGRATION_CONFIGURATION_INVALID" });
    const publicText = `${String(captured)}\n${
      captured instanceof Error ? (captured.stack ?? "") : ""
    }\n${JSON.stringify(captured)}`;
    if (databaseUrl) {
      expect(publicText).not.toContain(databaseUrl);
    }
    expect(clientConstructor).not.toHaveBeenCalled();
  });

  it("creates a lazy database composition without opening a connection", () => {
    const database = createPostgresMigrationDatabase(
      "postgresql://operator:do-not-log@example.test/ekklesia",
    );

    expect(Object.isFrozen(database)).toBe(true);
    expect(clientConstructor).not.toHaveBeenCalled();
    expect(JSON.stringify(database)).not.toContain("operator");
    expect(JSON.stringify(database)).not.toContain("do-not-log");
    expect(JSON.stringify(database)).not.toContain("example.test");
  });
});