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

import { runApiKeyMigrationCli } from "./migrate-api-keys.js";
import type { ApiKeyMigrationCliDependencies } from "./migrate-api-keys.js";

function createOutputBuffer(): Pick<typeof process.stdout, "write"> & { text: () => string } {
  const chunks: string[] = [];
  return {
    write: vi.fn((chunk: string | Uint8Array) => {
      chunks.push(String(chunk));
      return true;
    }) as unknown as typeof process.stdout.write,
    text: () => chunks.join(""),
  };
}

function createDependencies(overrides: Partial<ApiKeyMigrationCliDependencies> = {}) {
  const stdout = createOutputBuffer();
  const stderr = createOutputBuffer();
  const backfillLegacyApiKeyHashes = vi.fn().mockResolvedValue({ scanned: 0, updated: 0, skipped: 0, failed: 0, failures: [] });
  const dependencies = {
    stdout,
    stderr,
    backfillLegacyApiKeyHashes,
    ...overrides,
  };

  return dependencies as typeof dependencies & {
    stdout: typeof stdout;
    stderr: typeof stderr;
    backfillLegacyApiKeyHashes: typeof backfillLegacyApiKeyHashes;
  };
}

describe("runApiKeyMigrationCli", () => {
  it("defaults to dry-run and performs no writes", async () => {
    const dependencies = createDependencies();

    await expect(runApiKeyMigrationCli([], { API_KEY_HASH_SECRET: "fixture-hash-secret" }, dependencies)).resolves.toBe(0);

    expect(dependencies.backfillLegacyApiKeyHashes).not.toHaveBeenCalled();
    expect(JSON.parse(dependencies.stdout.text())).toMatchObject({
      mode: "dry-run",
      scanned: 0,
      updated: 0,
      skipped: 0,
      failed: 0,
    });
    expect(dependencies.stdout.text()).not.toContain("fixture-hash-secret");
    expect(dependencies.stderr.text()).toBe("");
  });

  it("executes the backfill with caller batch size and resolved hash secret", async () => {
    const dependencies = createDependencies({
      backfillLegacyApiKeyHashes: vi.fn().mockResolvedValue({
        scanned: 3,
        updated: 2,
        skipped: 1,
        failed: 0,
        failures: [],
      }),
    });

    await expect(
      runApiKeyMigrationCli(["--execute", "--batch-size", "3"], { API_KEY_HASH_SECRET: "fixture-hash-secret", JWT_SECRET: "fallback-secret" }, dependencies),
    ).resolves.toBe(0);

    expect(dependencies.backfillLegacyApiKeyHashes).toHaveBeenCalledWith({ batchSize: 3, hashSecret: "fixture-hash-secret" });
    expect(JSON.parse(dependencies.stdout.text())).toEqual({
      mode: "execute",
      batchSize: 3,
      scanned: 3,
      updated: 2,
      skipped: 1,
      failed: 0,
      failureIds: [],
    });
    expect(dependencies.stdout.text()).not.toContain("fixture-hash-secret");
    expect(dependencies.stdout.text()).not.toContain("fallback-secret");
  });

  it("falls back to JWT_SECRET when API_KEY_HASH_SECRET is blank", async () => {
    const dependencies = createDependencies();

    await expect(runApiKeyMigrationCli(["--execute"], { API_KEY_HASH_SECRET: " ", JWT_SECRET: "jwt-fallback-secret" }, dependencies)).resolves.toBe(0);

    expect(dependencies.backfillLegacyApiKeyHashes).toHaveBeenCalledWith({ batchSize: 100, hashSecret: "jwt-fallback-secret" });
    expect(dependencies.stdout.text()).not.toContain("jwt-fallback-secret");
  });

  it("rejects invalid batch-size before DB writes", async () => {
    const dependencies = createDependencies();

    await expect(runApiKeyMigrationCli(["--execute", "--batch-size", "0"], { API_KEY_HASH_SECRET: "fixture-hash-secret" }, dependencies)).resolves.toBe(1);

    expect(dependencies.backfillLegacyApiKeyHashes).not.toHaveBeenCalled();
    expect(dependencies.stderr.text()).toContain("Invalid --batch-size");
    expect(dependencies.stderr.text()).not.toContain("fixture-hash-secret");
    expect(dependencies.stdout.text()).toBe("");
  });

  it("redacts raw fixture secrets from failed summaries", async () => {
    const rawKey = "api_test_plaintext_secret";
    const dependencies = createDependencies({
      backfillLegacyApiKeyHashes: vi.fn().mockResolvedValue({
        scanned: 1,
        updated: 0,
        skipped: 0,
        failed: 1,
        failures: [{ id: "api_key_1", error: `database leaked ${rawKey}` }],
      }),
    });

    await expect(runApiKeyMigrationCli(["--execute"], { JWT_SECRET: "jwt-fallback-secret" }, dependencies)).resolves.toBe(1);

    expect(dependencies.stdout.text()).toContain("api_key_1");
    expect(dependencies.stdout.text()).not.toContain(rawKey);
    expect(dependencies.stdout.text()).not.toContain("jwt-fallback-secret");
    expect(dependencies.stderr.text()).toBe("");
  });

  it("redacts thrown migration helper errors", async () => {
    const rawKey = "api_test_plaintext_secret";
    const dependencies = createDependencies({
      backfillLegacyApiKeyHashes: vi.fn().mockRejectedValue(new Error(`connection failed for ${rawKey}`)),
    });

    await expect(runApiKeyMigrationCli(["--execute"], { API_KEY_HASH_SECRET: "fixture-hash-secret" }, dependencies)).resolves.toBe(1);

    expect(dependencies.stderr.text()).toContain("Error");
    expect(dependencies.stderr.text()).not.toContain(rawKey);
    expect(dependencies.stderr.text()).not.toContain("fixture-hash-secret");
    expect(dependencies.stdout.text()).toBe("");
  });
});