# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Commits::CherryPickService do
  let(:project) { create(:project, :repository) }
  # *   ddd0f15ae83993f5cb66a927a28673882e99100b (HEAD -> master, origin/master, origin/HEAD) Merge branch 'po-fix-test-en
  # |\
  # | * 2d1db523e11e777e49377cfb22d368deec3f0793 Correct test_env.rb path for adding branch
  # |/
  # *   1e292f8fedd741b75372e19097c76d327140c312 Merge branch 'cherry-pick-ce369011' into 'master'

  let_it_be(:merge_commit_sha) { 'ddd0f15ae83993f5cb66a927a28673882e99100b' }
  let_it_be(:merge_base_sha)   { '1e292f8fedd741b75372e19097c76d327140c312' }
  let_it_be(:branch_name)      { 'stable' }

  let(:repository) { project.repository }
  let(:commit) { project.commit }
  let(:user) { create(:user) }

  before do
    project.add_maintainer(user)

    repository.add_branch(user, branch_name, merge_base_sha)
  end

  def cherry_pick(sha, branch_name, message: nil)
    commit = project.commit(sha)

    described_class.new(
      project,
      user,
      commit: commit,
      start_branch: branch_name,
      branch_name: branch_name,
      message: message
    ).execute
  end

  describe '#execute' do
    shared_examples 'successful cherry-pick' do
      it 'picks the commit into the branch' do
        result = cherry_pick(merge_commit_sha, branch_name)
        expect(result[:status]).to eq(:success), result[:message]

        head = repository.find_branch(branch_name).target
        expect(head).not_to eq(merge_base_sha)
      end

      it 'supports a custom commit message' do
        result = cherry_pick(merge_commit_sha, branch_name, message: 'foo')
        branch = repository.find_branch(branch_name)

        expect(result[:status]).to eq(:success)
        expect(branch.dereferenced_target.message).to eq('foo')
      end
    end

    it_behaves_like 'successful cherry-pick'

    context 'when picking a merge-request' do
      let!(:merge_request) { create(:merge_request, :simple, :merged, author: user, source_project: project, merge_commit_sha: merge_commit_sha) }

      it_behaves_like 'successful cherry-pick'

      it 'adds a system note' do
        result = cherry_pick(merge_commit_sha, branch_name)

        mr_notes = find_cherry_pick_notes(merge_request)
        expect(mr_notes.length).to eq(1)
        expect(mr_notes[0].commit_id).to eq(result[:result])
      end
    end

    def find_cherry_pick_notes(noteable)
      noteable
        .notes
        .joins(:system_note_metadata)
        .where(system_note_metadata: { action: 'cherry_pick' })
    end
  end
end