// Copyright (c) 2014, 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.

library dart_style.test.io;

import 'dart:async';
import 'dart:io';

import 'package:dart_style/src/io.dart';
import 'package:path/path.dart' as p;
import 'package:scheduled_test/descriptor.dart' as d;
import 'package:scheduled_test/scheduled_test.dart';

import 'package:dart_style/src/formatter_options.dart';

import 'utils.dart';

void main() {
  setUpTestSuite();

  var overwriteOptions = new FormatterOptions(OutputReporter.overwrite);

  var followOptions =
      new FormatterOptions(OutputReporter.overwrite, followLinks: true);

  test('handles directory ending in ".dart"', () {
    d.dir('code.dart', [
      d.file('a.dart', unformattedSource),
    ]).create();

    schedule(() {
      var dir = new Directory(d.defaultRoot);
      processDirectory(overwriteOptions, dir);
    }, 'Run formatter.');

    d.dir('code.dart', [
      d.file('a.dart', formattedSource),
    ]).validate();
  });

  test("doesn't touch unchanged files", () {
    d.dir('code', [
      d.file('bad.dart', unformattedSource),
      d.file('good.dart', formattedSource),
    ]).create();

    modTime(String file) {
      return new File(p.join(d.defaultRoot, 'code', file)).statSync().modified;
    }

    var badBefore;
    var goodBefore;

    schedule(() {
      badBefore = modTime('bad.dart');
      goodBefore = modTime('good.dart');

      // Wait a bit so the mod time of a formatted file will be different.
      return new Future.delayed(new Duration(seconds: 1));
    });

    schedule(() {
      var dir = new Directory(p.join(d.defaultRoot, 'code'));
      processDirectory(overwriteOptions, dir);

      // Should be touched.
      var badAfter = modTime('bad.dart');
      expect(badAfter, isNot(equals(badBefore)));

      // Should not be touched.
      var goodAfter = modTime('good.dart');
      expect(goodAfter, equals(goodBefore));
    });
  });

  test("skips subdirectories whose name starts with '.'", () {
    d.dir('code', [
      d.dir('.skip', [d.file('a.dart', unformattedSource)])
    ]).create();

    schedule(() {
      var dir = new Directory(d.defaultRoot);
      processDirectory(overwriteOptions, dir);
    }, 'Run formatter.');

    d.dir('code', [
      d.dir('.skip', [d.file('a.dart', unformattedSource)])
    ]).validate();
  });

  test("traverses the given directory even if its name starts with '.'", () {
    d.dir('.code', [d.file('a.dart', unformattedSource)]).create();

    schedule(() {
      var dir = new Directory(p.join(d.defaultRoot, '.code'));
      processDirectory(overwriteOptions, dir);
    }, 'Run formatter.');

    d.dir('.code', [d.file('a.dart', formattedSource)]).validate();
  });

  test("doesn't follow directory symlinks by default", () {
    d.dir('code', [
      d.file('a.dart', unformattedSource),
    ]).create();

    d.dir('target_dir', [
      d.file('b.dart', unformattedSource),
    ]).create();

    schedule(() {
      // Create a link to the target directory in the code directory.
      new Link(p.join(d.defaultRoot, 'code', 'linked_dir'))
          .createSync(p.join(d.defaultRoot, 'target_dir'));
    }, 'Create symlinks.');

    schedule(() {
      var dir = new Directory(p.join(d.defaultRoot, 'code'));
      processDirectory(overwriteOptions, dir);
    }, 'Run formatter.');

    d.dir('code', [
      d.file('a.dart', formattedSource),
      d.dir('linked_dir', [
        d.file('b.dart', unformattedSource),
      ])
    ]).validate();
  });

  test("follows directory symlinks when 'followLinks' is true", () {
    d.dir('code', [
      d.file('a.dart', unformattedSource),
    ]).create();

    d.dir('target_dir', [
      d.file('b.dart', unformattedSource),
    ]).create();

    schedule(() {
      // Create a link to the target directory in the code directory.
      new Link(p.join(d.defaultRoot, 'code', 'linked_dir'))
          .createSync(p.join(d.defaultRoot, 'target_dir'));
    });

    schedule(() {
      var dir = new Directory(p.join(d.defaultRoot, 'code'));
      processDirectory(followOptions, dir);
    }, 'running formatter');

    d.dir('code', [
      d.file('a.dart', formattedSource),
      d.dir('linked_dir', [
        d.file('b.dart', formattedSource),
      ])
    ]).validate();
  });

  if (!Platform.isWindows) {
    // TODO(rnystrom): Figure out Windows equivalent of chmod and get this
    // test running on Windows too.
    test("reports error if file can not be written", () {
      d.file('a.dart', unformattedSource).create();

      schedule(() {
        Process.runSync("chmod", ["-w", p.join(d.defaultRoot, 'a.dart')]);
      }, 'Make file read-only.');

      schedule(() {
        var file = new File(p.join(d.defaultRoot, 'a.dart'));
        processFile(overwriteOptions, file);
      }, 'Run formatter.');

      // Should not have been formatted.
      d.file('a.dart', unformattedSource).validate();
    });

    test("doesn't follow file symlinks by default", () {
      d.dir('code').create();
      d.file('target_file.dart', unformattedSource).create();

      schedule(() {
        // Create a link to the target file in the code directory.
        new Link(p.join(d.defaultRoot, 'code', 'linked_file.dart'))
            .createSync(p.join(d.defaultRoot, 'target_file.dart'));
      }, 'Create symlinks.');

      schedule(() {
        var dir = new Directory(p.join(d.defaultRoot, 'code'));
        processDirectory(overwriteOptions, dir);
      }, 'Run formatter.');

      d.dir('code', [
        d.file('linked_file.dart', unformattedSource),
      ]).validate();
    });

    test("follows file symlinks when 'followLinks' is true", () {
      d.dir('code').create();
      d.file('target_file.dart', unformattedSource).create();

      schedule(() {
        // Create a link to the target file in the code directory.
        new Link(p.join(d.defaultRoot, 'code', 'linked_file.dart'))
            .createSync(p.join(d.defaultRoot, 'target_file.dart'));
      });

      schedule(() {
        var dir = new Directory(p.join(d.defaultRoot, 'code'));
        processDirectory(followOptions, dir);
      }, 'running formatter');

      d.dir('code', [
        d.file('linked_file.dart', formattedSource),
      ]).validate();
    });
  }
}