// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'dart:io';

import 'package:path/path.dart' as p;
import 'package:pub/src/entrypoint.dart';
import 'package:pub/src/exceptions.dart';
import 'package:pub/src/system_cache.dart';
import 'package:test/test.dart';

import 'descriptor.dart' as d;
import 'test_pub.dart';

late String root;
Entrypoint? entrypoint;

void main() {
  test('lists files recursively', () async {
    await d.dir(appPath, [
      d.pubspec({'name': 'myapp'}),
      d.file('file1.txt', 'contents'),
      d.file('file2.txt', 'contents'),
      d.dir('subdir', [
        d.file('subfile1.txt', 'subcontents'),
        d.file('subfile2.txt', 'subcontents')
      ]),
      d.dir(Uri.encodeComponent('\\/%+-='), [
        d.file(Uri.encodeComponent('\\/%+-=')),
      ]),
    ]).create();
    createEntrypoint();

    expect(
        entrypoint!.root.listFiles(),
        unorderedEquals([
          p.join(root, 'pubspec.yaml'),
          p.join(root, 'file1.txt'),
          p.join(root, 'file2.txt'),
          p.join(root, 'subdir', 'subfile1.txt'),
          p.join(root, 'subdir', 'subfile2.txt'),
          p.join(root, Uri.encodeComponent('\\/%+-='),
              Uri.encodeComponent('\\/%+-=')),
        ]));
  });

  // On windows symlinks to directories are distinct from symlinks to files.
  void createDirectorySymlink(String path, String target) {
    if (Platform.isWindows) {
      Process.runSync('cmd', ['/c', 'mklink', '/D', path, target]);
    } else {
      Link(path).createSync(target);
    }
  }

  test('throws on directory symlinks', () async {
    await d.dir(appPath, [
      d.pubspec({'name': 'myapp'}),
      d.file('file1.txt', 'contents'),
      d.file('file2.txt', 'contents'),
      d.dir('subdir', [
        d.dir('a', [d.file('file')])
      ]),
    ]).create();
    createDirectorySymlink(
        p.join(d.sandbox, appPath, 'subdir', 'symlink'), 'a');

    createEntrypoint();

    expect(
      () => entrypoint!.root.listFiles(),
      throwsA(
        isA<DataException>().having(
          (e) => e.message,
          'message',
          contains(
            'Pub does not support publishing packages with directory symlinks',
          ),
        ),
      ),
    );
  });

  test('can list a package inside a symlinked folder', () async {
    await d.dir(appPath, [
      d.pubspec({'name': 'myapp'}),
      d.file('file1.txt', 'contents'),
      d.file('file2.txt', 'contents'),
      d.dir('subdir', [
        d.dir('a', [d.file('file')])
      ]),
    ]).create();

    final root = p.join(d.sandbox, 'symlink');
    createDirectorySymlink(root, appPath);

    final entrypoint = Entrypoint(p.join(d.sandbox, 'symlink'),
        SystemCache(rootDir: p.join(d.sandbox, cachePath)));

    expect(entrypoint.root.listFiles(), {
      p.join(root, 'pubspec.yaml'),
      p.join(root, 'file1.txt'),
      p.join(root, 'file2.txt'),
      p.join(root, 'subdir', 'a', 'file'),
    });
  });

  test('throws on non-resolving file symlinks', () async {
    await d.dir(appPath, [
      d.pubspec({'name': 'myapp'}),
      d.file('file1.txt', 'contents'),
      d.file('file2.txt', 'contents'),
      d.dir('subdir', [
        d.dir('a', [d.file('file')])
      ]),
    ]).create();
    Link(p.join(d.sandbox, appPath, 'subdir', 'symlink'))
        .createSync('nonexisting');

    createEntrypoint();

    expect(
      () => entrypoint!.root.listFiles(),
      throwsA(
        isA<DataException>().having(
          (e) => e.message,
          'message',
          contains(
              'Pub does not support publishing packages with non-resolving symlink:'),
        ),
      ),
    );
  });

  test('throws on reciprocal symlinks', () async {
    await d.dir(appPath, [
      d.pubspec({'name': 'myapp'}),
      d.file('file1.txt', 'contents'),
      d.file('file2.txt', 'contents'),
      d.dir('subdir', [
        d.dir('a', [d.file('file')])
      ]),
    ]).create();
    Link(p.join(d.sandbox, appPath, 'subdir', 'symlink1'))
        .createSync('symlink2');
    Link(p.join(d.sandbox, appPath, 'subdir', 'symlink2'))
        .createSync('symlink1');
    createEntrypoint();

    expect(
      () => entrypoint!.root.listFiles(),
      throwsA(
        isA<DataException>().having(
          (e) => e.message,
          'message',
          contains(
              'Pub does not support publishing packages with non-resolving symlink:'),
        ),
      ),
    );
  });
  test('pubignore can undo the exclusion of .-files', () async {
    await d.dir(appPath, [
      d.file('.pubignore', '!.foo'),
      d.pubspec({'name': 'myapp'}),
      d.file('.foo', ''),
    ]).create();
    createEntrypoint();
    expect(entrypoint!.root.listFiles(), {
      p.join(root, '.foo'),
      p.join(root, 'pubspec.yaml'),
    });
  });
  group('with git', () {
    late d.GitRepoDescriptor repo;
    setUp(() async {
      ensureGit();
      repo = d.git(appPath, [d.appPubspec()]);
      await repo.create();
      createEntrypoint();
    });

    test("includes files that are or aren't checked in", () async {
      await d.dir(appPath, [
        d.file('file1.txt', 'contents'),
        d.file('file2.txt', 'contents'),
        d.dir('subdir', [
          d.file('subfile1.txt', 'subcontents'),
          d.file('subfile2.txt', 'subcontents')
        ])
      ]).create();

      expect(entrypoint!.root.listFiles(), {
        p.join(root, 'pubspec.yaml'),
        p.join(root, 'file1.txt'),
        p.join(root, 'file2.txt'),
        p.join(root, 'subdir', 'subfile1.txt'),
        p.join(root, 'subdir', 'subfile2.txt')
      });
    });

    test('ignores files that are gitignored', () async {
      await d.dir(appPath, [
        d.file('.gitignore', '*.txt'),
        d.file('file1.txt', 'contents'),
        d.file('file2.text', 'contents'),
        d.dir('subdir', [
          d.file('subfile1.txt', 'subcontents'),
          d.file('subfile2.text', 'subcontents')
        ])
      ]).create();

      expect(entrypoint!.root.listFiles(), {
        p.join(root, 'pubspec.yaml'),
        p.join(root, 'file2.text'),
        p.join(root, 'subdir', 'subfile2.text')
      });
    });

    test(
        "ignores files that are gitignored even if the package isn't "
        'the repo root', () async {
      await d.dir(appPath, [
        d.file('.gitignore', '*.bak'),
        d.dir('rep', [
          d.file('.gitignore', '*.gak'),
          d.file('.pubignore', '*.hak'),
          d.dir('sub', [
            d.appPubspec(),
            d.file('.gitignore', '*.txt'),
            d.file('file1.txt', 'contents'),
            d.file('file2.text', 'contents'),
            d.file('file3.bak', 'contents'),
            d.file('file4.gak', 'contents'),
            d.file('file5.hak', 'contents'),
            d.dir('subdir', [
              d.file('subfile1.txt', 'subcontents'),
              d.file('subfile2.text', 'subcontents'),
            ])
          ]),
        ])
      ]).create();

      createEntrypoint(p.join(appPath, 'rep', 'sub'));

      expect(entrypoint!.root.listFiles(), {
        p.join(root, 'pubspec.yaml'),
        p.join(root, 'file2.text'),
        p.join(root, 'file4.gak'),
        p.join(root, 'subdir', 'subfile2.text')
      });
    });

    test("Don't ignore packages/ before the package root", () async {
      await d.dir(appPath, [
        d.dir('packages', [
          d.dir('app', [
            d.appPubspec(),
            d.dir('packages', [d.file('a.txt')]),
          ]),
        ]),
      ]).create();

      createEntrypoint(p.join(appPath, 'packages', 'app'));

      expect(entrypoint!.root.listFiles(), {
        p.join(root, 'pubspec.yaml'),
      });
    });

    group('with a submodule', () {
      setUp(() async {
        await d.git('submodule', [
          d.file('.gitignore', '*.txt'),
          d.file('file2.text', 'contents')
        ]).create();

        await repo.runGit(['submodule', 'add', '../submodule']);

        await d.file('$appPath/submodule/file1.txt', 'contents').create();

        createEntrypoint();
      });

      test('respects its .gitignore with useGitIgnore', () {
        expect(entrypoint!.root.listFiles(), {
          p.join(root, 'pubspec.yaml'),
          p.join(root, 'submodule', 'file2.text'),
        });
      });
    });

    test('ignores pubspec.lock files', () async {
      await d.dir(appPath, [
        d.file('pubspec.lock'),
        d.dir('subdir', [d.file('pubspec.lock')])
      ]).create();

      expect(entrypoint!.root.listFiles(), {p.join(root, 'pubspec.yaml')});
    });

    test('ignores packages directories', () async {
      await d.dir(appPath, [
        d.dir('packages', [d.file('file.txt', 'contents')]),
        d.dir('subdir', [
          d.dir('packages', [d.file('subfile.txt', 'subcontents')]),
        ])
      ]).create();

      expect(entrypoint!.root.listFiles(), {p.join(root, 'pubspec.yaml')});
    });

    test('allows pubspec.lock directories', () async {
      await d.dir(appPath, [
        d.dir('pubspec.lock', [
          d.file('file.txt', 'contents'),
        ])
      ]).create();

      expect(entrypoint!.root.listFiles(), {
        p.join(root, 'pubspec.yaml'),
        p.join(root, 'pubspec.lock', 'file.txt')
      });
    });

    group('and "beneath"', () {
      test('only lists files beneath the given root', () async {
        await d.dir(appPath, [
          d.file('file1.txt', 'contents'),
          d.file('file2.txt', 'contents'),
          d.dir('subdir', [
            d.file('subfile1.txt', 'subcontents'),
            d.file('subfile2.txt', 'subcontents'),
            d.dir('subsubdir', [
              d.file('subsubfile1.txt', 'subsubcontents'),
              d.file('subsubfile2.txt', 'subsubcontents'),
            ])
          ])
        ]).create();

        expect(entrypoint!.root.listFiles(beneath: 'subdir'), {
          p.join(root, 'subdir', 'subfile1.txt'),
          p.join(root, 'subdir', 'subfile2.txt'),
          p.join(root, 'subdir', 'subsubdir', 'subsubfile1.txt'),
          p.join(root, 'subdir', 'subsubdir', 'subsubfile2.txt')
        });
      });
    });

    test('.pubignore', () async {
      await d.validPackage.create();
      await d.dir(appPath, [
        d.file('.pubignore', '''
/lib/ignored.dart
'''),
        d.dir('lib', [d.file('ignored.dart', 'content')]),
        d.dir('lib', [d.file('not_ignored.dart', 'content')]),
      ]).create();
      createEntrypoint();
      expect(entrypoint!.root.listFiles(), {
        p.join(root, 'LICENSE'),
        p.join(root, 'CHANGELOG.md'),
        p.join(root, 'README.md'),
        p.join(root, 'pubspec.yaml'),
        p.join(root, 'lib', 'test_pkg.dart'),
        p.join(root, 'lib', 'not_ignored.dart'),
      });
    });
  });

  test('.pubignore overrides .gitignore', () async {
    ensureGit();
    final repo = d.git(appPath, [
      d.appPubspec(),
      d.file('.gitignore', '*.txt'),
      d.file('.pubignore', '*.text'),
      d.file('ignored_by_pubignore.text', ''),
      d.file('not_ignored_by_gitignore.txt', 'contents'),
      d.file('.hidden'),
      d.dir('gitignoredir', [
        d.file('.gitignore', 'foo'),
        d.file('foo'),
        d.file('bar'),
        d.file('a.txt'),
        d.file('a.text'),
        d.dir('nested', [
          d.file('.pubignore', '''
!foo
!*.text
'''),
          d.file('foo'),
          d.file('bar'),
          d.file('c.text'),
        ]),
      ]),
      d.dir('pubignoredir', [
        d.file('.pubignore', 'bar'),
        d.file('foo'),
        d.file('bar'),
        d.file('b.txt'),
        d.file('b.text'),
      ]),
    ]);
    await repo.create();
    createEntrypoint();
    await d.dir(appPath, [
      d.file('ignored_by_gitignore.txt', 'contents'),
      d.file('ignored_by_pubignore2.text', ''),
    ]).create();

    createEntrypoint();
    expect(entrypoint!.root.listFiles(), {
      p.join(root, 'pubspec.yaml'),
      p.join(root, 'not_ignored_by_gitignore.txt'),
      p.join(root, 'ignored_by_gitignore.txt'),
      p.join(root, 'gitignoredir', 'bar'),
      p.join(root, 'gitignoredir', 'a.txt'),
      p.join(root, 'gitignoredir', 'nested', 'foo'),
      p.join(root, 'gitignoredir', 'nested', 'bar'),
      p.join(root, 'gitignoredir', 'nested', 'c.text'),
      p.join(root, 'pubignoredir', 'foo'),
      p.join(root, 'pubignoredir', 'b.txt'),
    });
  });
}

void createEntrypoint([String? path]) {
  path ??= appPath;
  root = p.join(d.sandbox, path);
  entrypoint = Entrypoint(root, SystemCache(rootDir: root));

  addTearDown(() {
    entrypoint = null;
  });
}