require 'git_shizzle'

describe 'Indexes specified on the CLI' do

  let(:git) { GitShizzle::Git::Git.new(repo) }
  subject { GitShizzle::QuickGit.new(git) }
  let(:number_of_untracked_files) { 10 }

  before do
    allow($stdout).to receive(:puts)
  end

  before do
    number_of_untracked_files.times.each do |i|
      create 'untracked-%02d' % (i + 1)
    end
  end

  def assert_index_status(*status)
    number_of_untracked_files.times.each do |i|
      expected_status = status[i] || status[-1]
      expect(git.status[i].index_status).to eq(expected_status)
    end
  end

  describe 'indexes' do
    context 'when no index is specified' do
      it 'should fail' do
        expect { subject.track }.to raise_error(GitShizzle::IndexSpecifications::NoFilesError, "No files for command 'track'.")
      end
    end

    context 'when specifying an index' do
      it 'should operate on the file mapped to the index' do
        subject.track 1

        assert_index_status :added, :untracked
      end
    end

    context 'when specifying a string index' do
      it 'should operate on the file mapped to the index' do
        subject.track '1'

        assert_index_status :added, :untracked
      end
    end

    context 'when specifying a non-numeric index' do
      it 'should fail' do
        expect { subject.track 'a' }.to raise_error(GitShizzle::IndexSpecifications::IndexParserError, /Could not parse index 'a'/)

        assert_index_status :untracked
      end
    end

    context 'when specifying an index outside of the range of available indexes' do
      it 'should fail' do
        expect { subject.track 42 }.to raise_error(GitShizzle::IndexSpecifications::IndexSpecificationError, 'Could not determine files for indexes: 42')

        assert_index_status :untracked
      end
    end

    context 'when specifying the same index twice' do
      it 'should operate on the file mapped to the index once' do
        subject.track 1, 1

        assert_index_status :added, :untracked
      end
    end
  end

  describe 'ranges' do
    context 'when a specifying an inclusive range' do
      it 'should operate on each file in the range' do
        subject.track '1..3'

        assert_index_status :added, :added, :added, :untracked
      end
    end

    context 'when a specifying an exclusive range' do
      it 'should operate on each file in the range' do
        subject.track '1...3'

        assert_index_status :added, :added, :untracked
      end
    end

    context 'when specifying a non-numeric range' do
      it 'should fail' do
        expect { subject.track 'a..z' }.to raise_error(GitShizzle::IndexSpecifications::IndexParserError, /Could not parse index 'a\.\.z'/)

        assert_index_status :untracked
      end
    end

    context 'when specifying a non-numeric exclusive range' do
      it 'should fail' do
        expect { subject.track 'a...z' }.to raise_error(GitShizzle::IndexSpecifications::IndexParserError, /Could not parse index 'a\.\.\.z'/)

        assert_index_status :untracked
      end
    end

    context 'when specifying a range outside of the range of available indexes' do
      it 'should fail' do
        expect { subject.track '11..15' }.to raise_error(GitShizzle::IndexSpecifications::IndexSpecificationError, 'Could not determine files for indexes: 11, 12, 13, 14, 15')

        assert_index_status :untracked
      end
    end

    context 'when specifying a range partly outside of the range of available indexes' do
      it 'should fail' do
        expect { subject.track '9..15' }.to raise_error(GitShizzle::IndexSpecifications::IndexSpecificationError, 'Could not determine files for indexes: 11, 12, 13, 14, 15')

        assert_index_status :untracked
      end
    end

    context 'when specifying overlapping index and range' do
      it 'should operate on each file in the range once' do
        subject.track 1, 2, 3, '1..3', '1...3'

        assert_index_status :added, :added, :added, :untracked
      end
    end
  end

  describe 'current directory' do
    context 'when a specifying the current directory' do
      it 'should operate on each file' do
        subject.track '.'

        assert_index_status :added
      end
    end

    context 'when a specifying the current directory and a file index' do
      it 'should operate on each file' do
        subject.track 1, '.'

        assert_index_status :added
      end
    end

    context 'when a specifying the current directory and a file index outside of the range of available indexes' do
      it 'should operate on each file' do
        expect { subject.track 42, '.' }.to raise_error(GitShizzle::IndexSpecifications::IndexSpecificationError, 'Could not determine files for indexes: 42')

        assert_index_status :untracked
      end
    end
  end
end