/**
 * GET /api/auth/mode — unit tests (Plan 19-03, TDD RED → GREEN).
 *
 * Covers:
 *   Test 5: returns { localEnabled:true, oidcEnabled:false } when no oidc_issuer in env or app_config
 *   Test 6: returns { oidcEnabled:true } when OIDC_ISSUER env var is set
 *   Test 6b: returns { oidcEnabled:true } when oidc_issuer is in app_config (no env var)
 *
 * Pre-auth surface: reachable without OIDC session (same as /api/setup/status).
 */

import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';

// ---------------------------------------------------------------------------
// DB mock — controls app_config rows returned for oidc_issuer
// ---------------------------------------------------------------------------

let mockAppConfigOidcIssuer: string | null = null;

vi.mock('../../src/db/client.js', () => ({
  db: {
    execute: vi.fn().mockResolvedValue([[{ '1': 1 }]]),
    select: vi.fn().mockImplementation(() => ({
      from: vi.fn().mockReturnValue({
        where: vi.fn().mockReturnValue({
          limit: vi.fn().mockImplementation(() => {
            if (mockAppConfigOidcIssuer) {
              return Promise.resolve([{ value: mockAppConfigOidcIssuer }]);
            }
            return Promise.resolve([]);
          }),
        }),
      }),
    })),
    insert: vi.fn().mockReturnValue({
      values: vi.fn().mockReturnValue({
        onDuplicateKeyUpdate: vi.fn().mockResolvedValue(undefined),
      }),
    }),
  },
}));

vi.mock('@hono/oidc-auth', () => ({
  oidcAuthMiddleware: () => async (_c: unknown, next: () => Promise<void>) => next(),
  processOAuthCallback: () => async (c: { json: (v: unknown) => unknown }) => c.json({ ok: true }),
  getAuth: vi.fn().mockResolvedValue(null),
}));

vi.mock('../../src/auth/devBypass.js', () => ({
  devAuthBypass: () => async (_c: unknown, next: () => Promise<void>) => next(),
  // Phase 19 Option C: devSessionCookieMiddleware is a no-op in tests
  devSessionCookieMiddleware: () => async (_c: unknown, next: () => Promise<void>) => next(),
}));

vi.mock('../../src/auth/localAuthMiddleware.js', () => ({
  localAuthMiddleware: () => async (_c: unknown, next: () => Promise<void>) => next(),
}));

// ---------------------------------------------------------------------------
// Env snapshot
// ---------------------------------------------------------------------------

const originalOidcIssuer = process.env.OIDC_ISSUER;

beforeEach(() => {
  mockAppConfigOidcIssuer = null;
  delete process.env.OIDC_ISSUER;
  vi.resetModules();
});

afterEach(() => {
  if (originalOidcIssuer === undefined) {
    delete process.env.OIDC_ISSUER;
  } else {
    process.env.OIDC_ISSUER = originalOidcIssuer;
  }
  vi.resetModules();
});

// ---------------------------------------------------------------------------
// Tests
// ---------------------------------------------------------------------------

describe('GET /api/auth/mode', () => {
  it('Test 5: returns { localEnabled:true, oidcEnabled:false } when no oidc_issuer in env or app_config', async () => {
    delete process.env.OIDC_ISSUER;
    mockAppConfigOidcIssuer = null;

    const { app } = await import('../../src/index.js');
    const res = await app.request('/api/auth/mode');

    expect(res.status).toBe(200);
    const body = (await res.json()) as { localEnabled: boolean; oidcEnabled: boolean };
    expect(body.localEnabled).toBe(true);
    expect(body.oidcEnabled).toBe(false);
  });

  it('Test 6: returns { oidcEnabled:true } when OIDC_ISSUER env var is set', async () => {
    process.env.OIDC_ISSUER = 'https://auth.example.com';
    mockAppConfigOidcIssuer = null;

    const { app } = await import('../../src/index.js');
    const res = await app.request('/api/auth/mode');

    expect(res.status).toBe(200);
    const body = (await res.json()) as { localEnabled: boolean; oidcEnabled: boolean };
    expect(body.localEnabled).toBe(true);
    expect(body.oidcEnabled).toBe(true);
  });

  it('Test 6b: returns { oidcEnabled:true } when oidc_issuer is in app_config (no env var)', async () => {
    delete process.env.OIDC_ISSUER;
    mockAppConfigOidcIssuer = 'https://auth-from-config.example.com';

    const { app } = await import('../../src/index.js');
    const res = await app.request('/api/auth/mode');

    expect(res.status).toBe(200);
    const body = (await res.json()) as { localEnabled: boolean; oidcEnabled: boolean };
    expect(body.localEnabled).toBe(true);
    expect(body.oidcEnabled).toBe(true);
  });
});