import { afterEach, beforeEach, describe, expect, it } from 'vitest';
import {
  StorageError,
  UPLOAD_KINDS,
  buildKey,
  isPrivateKind,
  resetStorageClient,
  validateUpload,
} from '../src/index';

const OWNER = '11111111-2222-4333-8444-555555555555';

describe('validateUpload', () => {
  it('accepts an image for a photo upload', () => {
    expect(() =>
      validateUpload({ kind: 'pro_photo', contentType: 'image/jpeg', contentLength: 1024 }),
    ).not.toThrow();
  });

  it('rejects a content type that is not on the allow list', () => {
    expect(() =>
      validateUpload({ kind: 'pro_photo', contentType: 'text/html', contentLength: 1024 }),
    ).toThrow(StorageError);
  });

  it('rejects an SVG — it can carry script', () => {
    expect(() =>
      validateUpload({ kind: 'avatar', contentType: 'image/svg+xml', contentLength: 1024 }),
    ).toThrow(StorageError);
  });

  it('rejects a file over the per-kind cap', () => {
    expect(() =>
      validateUpload({
        kind: 'avatar',
        contentType: 'image/png',
        contentLength: UPLOAD_KINDS.avatar.maxBytes + 1,
      }),
    ).toThrow(/too large/i);
  });

  it('accepts a file exactly on the cap', () => {
    expect(() =>
      validateUpload({
        kind: 'avatar',
        contentType: 'image/png',
        contentLength: UPLOAD_KINDS.avatar.maxBytes,
      }),
    ).not.toThrow();
  });

  it('allows PDFs for credentials but not for avatars', () => {
    expect(() =>
      validateUpload({ kind: 'credential', contentType: 'application/pdf', contentLength: 1024 }),
    ).not.toThrow();
    expect(() =>
      validateUpload({ kind: 'avatar', contentType: 'application/pdf', contentLength: 1024 }),
    ).toThrow(StorageError);
  });

  it('names the allowed types in the error so the UI can show it', () => {
    try {
      validateUpload({ kind: 'avatar', contentType: 'video/mp4', contentLength: 10 });
      throw new Error('should have thrown');
    } catch (error) {
      expect((error as Error).message).toMatch(/image\/jpeg/);
    }
  });
});

describe('buildKey', () => {
  it('puts the owner in the path and the right extension on the end', () => {
    const key = buildKey('credential', OWNER, 'application/pdf');
    expect(key).toMatch(new RegExp(`^credentials/${OWNER}/[0-9a-f-]{36}\\.pdf$`));
  });

  it('never collides across two calls', () => {
    const a = buildKey('pro_photo', OWNER, 'image/png');
    const b = buildKey('pro_photo', OWNER, 'image/png');
    expect(a).not.toBe(b);
  });

  it("keeps one owner out of another owner's prefix", () => {
    const mine = buildKey('credential', OWNER, 'image/png');
    const theirs = buildKey('credential', '99999999-2222-4333-8444-555555555555', 'image/png');
    expect(mine.startsWith(`credentials/${OWNER}/`)).toBe(true);
    expect(theirs.startsWith(`credentials/${OWNER}/`)).toBe(false);
  });

  it('falls back to .bin for an unmapped type rather than producing a bare key', () => {
    // validateUpload is the gate; buildKey must still not emit an extensionless key.
    expect(buildKey('pro_photo', OWNER, 'application/octet-stream')).toMatch(/\.bin$/);
  });
});

describe('isPrivateKind', () => {
  it('marks credentials private and photos public', () => {
    expect(isPrivateKind('credential')).toBe(true);
    expect(isPrivateKind('pro_photo')).toBe(false);
    expect(isPrivateKind('avatar')).toBe(false);
  });
});

describe('configuration', () => {
  const saved = { ...process.env };

  beforeEach(() => {
    resetStorageClient();
    for (const k of [
      'SPACES_REGION',
      'SPACES_KEY',
      'SPACES_SECRET',
      'SPACES_BUCKET',
      'SPACES_CDN_URL',
    ]) {
      delete process.env[k];
    }
  });

  afterEach(() => {
    process.env = { ...saved };
    resetStorageClient();
  });

  it('names every missing variable instead of failing vaguely', async () => {
    const { createPresignedUpload } = await import('../src/index');
    await expect(
      createPresignedUpload({
        kind: 'avatar',
        contentType: 'image/png',
        contentLength: 100,
        ownerId: OWNER,
      }),
    ).rejects.toThrow(/SPACES_REGION.*SPACES_KEY/s);
  });

  it('validates the upload before it complains about configuration', async () => {
    const { createPresignedUpload } = await import('../src/index');
    // A bad content type is the caller's fault and should be reported as such,
    // even on a machine with no R2 credentials.
    await expect(
      createPresignedUpload({
        kind: 'avatar',
        contentType: 'text/html',
        contentLength: 100,
        ownerId: OWNER,
      }),
    ).rejects.toThrow(/not allowed/i);
  });
});

describe('key/URL contract with the API', () => {
  /**
   * Regression: credential uploads return an object KEY (they are private and
   * have no public URL), but the credential schema originally demanded
   * z.string().url(). The result was that pro onboarding could never be
   * completed — every document upload failed validation at the last step.
   *
   * This asserts the contract in both directions so the two halves cannot drift
   * apart again.
   */
  it('produces a key that is NOT a URL for private kinds', () => {
    const key = buildKey('credential', OWNER, 'application/pdf');
    expect(() => new URL(key)).toThrow();
    expect(isPrivateKind('credential')).toBe(true);
  });

  it('accepts that key against the credential schema', async () => {
    const { credentialSchema } = await import('@linkdr/shared');
    const key = buildKey('credential', OWNER, 'application/pdf');
    expect(credentialSchema.safeParse({ kind: 'insurance', fileKey: key }).success).toBe(true);
  });

  it('rejects an empty key rather than storing a dangling reference', async () => {
    const { credentialSchema } = await import('@linkdr/shared');
    expect(credentialSchema.safeParse({ kind: 'insurance', fileKey: '' }).success).toBe(false);
  });
});