# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Gitlab::GitalyClient::ConflictsService do
  let(:project) { create(:project, :repository) }
  let(:target_project) { create(:project, :repository) }
  let(:source_repository) { project.repository.raw }
  let(:target_repository) { target_project.repository.raw }
  let(:target_gitaly_repository) { target_repository.gitaly_repository }
  let(:our_commit_oid) { 'f00' }
  let(:their_commit_oid) { 'f44' }
  let(:client) do
    described_class.new(target_repository, our_commit_oid, their_commit_oid)
  end

  describe '#conflicts' do
    subject(:conflicts) { client.conflicts? }

    it 'calls list_conflict_files with no parameters' do
      expect_any_instance_of(described_class).to receive(:list_conflict_files)
          .and_return(["let's pretend i'm a conflicted file"])

      conflicts
    end
  end

  describe '#list_conflict_files' do
    let(:allow_tree_conflicts) { false }
    let(:request) do
      Gitaly::ListConflictFilesRequest.new(
        repository: target_gitaly_repository,
        our_commit_oid: our_commit_oid,
        their_commit_oid: their_commit_oid,
        allow_tree_conflicts: allow_tree_conflicts
      )
    end

    shared_examples_for 'listing conflicts' do
      it 'sends an RPC request' do
        expect_any_instance_of(Gitaly::ConflictsService::Stub).to receive(:list_conflict_files)
          .with(request, kind_of(Hash)).and_return([].to_enum)

        client.list_conflict_files(allow_tree_conflicts: allow_tree_conflicts)
      end
    end

    it_behaves_like 'listing conflicts'

    context 'when allow_tree_conflicts is set to true' do
      let(:allow_tree_conflicts) { true }

      it_behaves_like 'listing conflicts'
    end
  end

  describe '#resolve_conflicts' do
    let(:user) { create(:user) }
    let(:files) do
      [{ old_path: 'some/path', new_path: 'some/path', content: '' }]
    end

    let(:source_branch) { 'master' }
    let(:target_branch) { 'feature' }
    let(:commit_message) { 'Solving conflicts\n\nTést' }
    let(:resolution) do
      Gitlab::Git::Conflict::Resolution.new(user, files, commit_message)
    end

    subject do
      client.resolve_conflicts(source_repository, resolution, source_branch, target_branch)
    end

    it 'sends an RPC request' do
      expect_any_instance_of(Gitaly::ConflictsService::Stub).to receive(:resolve_conflicts)
        .with(kind_of(Enumerator), kind_of(Hash)).and_return(double(resolution_error: ""))

      subject
    end

    context 'with branches with UTF-8 characters' do
      let(:source_branch) { 'testòbranch' }
      let(:target_branch) { 'ábranch' }

      it 'handles commit messages with UTF-8 characters' do
        allow(::Gitlab::GitalyClient).to receive(:call).and_call_original
        expect(::Gitlab::GitalyClient).to receive(:call).with(anything, :conflicts_service, :resolve_conflicts, any_args) do |*args|
          # Force the generation of request messages by iterating through the enumerator
          message = args[3].to_a.first
          params = [message.header.commit_message, message.header.source_branch, message.header.target_branch]
          expect(params.map(&:encoding).uniq).to eq([Encoding::ASCII_8BIT])

          double(resolution_error: nil)
        end

        subject
      end
    end

    it 'raises a relevant exception if resolution_error is present' do
      expect_any_instance_of(Gitaly::ConflictsService::Stub).to receive(:resolve_conflicts)
        .with(kind_of(Enumerator), kind_of(Hash)).and_return(double(resolution_error: "something happened"))

      expect { subject }.to raise_error(Gitlab::Git::Conflict::Resolver::ResolutionError)
    end
  end
end
