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

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

vi.mock("pg", () => ({ Pool: poolConstructor }));

import { createIdentityDrizzleDatabase, IdentityDatabaseError } from "../src/identity/database.js";

describe("Core identity Drizzle database composition", () => {
  it("does not construct a pool merely because the module is imported", () => {
    expect(poolConstructor).not.toHaveBeenCalled();
  });

  it.each([
    "",
    "   ",
    "not-a-database-url",
    "https://admin:do-not-log@db.example.test/database",
  ])("rejects an invalid connection string without exposing it (%s)", (connectionString) => {
    let captured: unknown;
    try {
      createIdentityDrizzleDatabase(connectionString);
    } catch (error) {
      captured = error;
    }

    expect(captured).toBeInstanceOf(IdentityDatabaseError);
    expect(captured).toMatchObject({ code: "IDENTITY_DATABASE_CONFIGURATION_INVALID" });
    const publicText = `${String(captured)}\n${
      captured instanceof Error ? (captured.stack ?? "") : ""
    }`;
    if (connectionString) {
      expect(publicText).not.toContain(connectionString);
    }
    expect(poolConstructor).not.toHaveBeenCalled();
  });

  it("explicitly constructs the pool only when called, with the identity schema attached", () => {
    poolConstructor.mockImplementation(function fakePool() {
      return { end: async () => undefined };
    });

    const handle = createIdentityDrizzleDatabase(
      "postgresql://operator:do-not-log@example.test/ekklesia",
    );

    expect(poolConstructor).toHaveBeenCalledTimes(1);
    expect(handle.db).toBeDefined();
    expect(typeof handle.close).toBe("function");
    expect(Object.isFrozen(handle)).toBe(true);
  });

  it("passes the connection timeout through to the pool configuration", () => {
    poolConstructor.mockImplementation(function fakePool() {
      return { end: async () => undefined };
    });
    poolConstructor.mockClear();

    createIdentityDrizzleDatabase("postgresql://example.test/ekklesia", {
      connectionTimeoutMs: 5_000,
    });

    expect(poolConstructor).toHaveBeenCalledWith(
      expect.objectContaining({ connectionTimeoutMillis: 5_000 }),
    );
  });
});