# frozen_string_literal: true

module Gitlab
  module DataBuilder
    module Push
      extend self

      SAMPLE_DATA =
        {
          object_kind: "push",
          event_name: "push",
          before: "95790bf891e76fee5e1747ab589903a6a1f80f22",
          after: "da1560886d4f094c3e6c9ef40349f7d38b5d27d7",
          ref: "refs/heads/master",
          ref_protected: true,
          checkout_sha: "da1560886d4f094c3e6c9ef40349f7d38b5d27d7",
          message: "Hello World",
          user_id: 4,
          user_name: "John Smith",
          user_email: "john@example.com",
          user_avatar: "https://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=8://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=80",
          project_id: 15,
          project: {
            id: 15,
            name: "gitlab",
            description: "",
            web_url: "http://test.example.com/gitlab/gitlab",
            avatar_url: "https://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=8://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=80",
            git_ssh_url: "git@test.example.com:gitlab/gitlab.git",
            git_http_url: "http://test.example.com/gitlab/gitlab.git",
            namespace: "gitlab",
            visibility_level: 0,
            path_with_namespace: "gitlab/gitlab",
            default_branch: "master"
          },
          commits: [
            {
              id: "c5feabde2d8cd023215af4d2ceeb7a64839fc428",
              message: "Add simple search to projects in public area\n\ncommit message body",
              title: "Add simple search to projects in public area",
              timestamp: "2013-05-13T18:18:08+00:00",
              url: "https://test.example.com/gitlab/gitlab/-/commit/c5feabde2d8cd023215af4d2ceeb7a64839fc428",
              author: {
                name: "Test User",
                email: "test@example.com"
              }
            }
          ],
          total_commits_count: 1,
          push_options: { ci: { skip: true } }
        }.freeze

      DEFAULT_TAG_NAME = 'v1.0.0'
      SAMPLE_TAG_DATA =
        {
          object_kind: "tag_push",
          event_name: "tag_push",
          ref: "refs/tags/#{DEFAULT_TAG_NAME}"
        }.freeze

      # Produce a hash of post-receive data
      #
      # data = {
      #   before: String,
      #   after: String,
      #   ref: String,
      #   ref_protected: Boolean,
      #   user_id: String,
      #   user_name: String,
      #   user_username: String,
      #   user_email: String
      #   project_id: Fixnum,
      #   project: {
      #     id: Fixnum,
      #     name: String,
      #     description: String,
      #     web_url: String,
      #     avatar_url: String,
      #     git_ssh_url: String,
      #     git_http_url: String,
      #     namespace: String,
      #     visibility_level: Fixnum,
      #     path_with_namespace: String,
      #     default_branch: String
      #   }
      #   repository: {
      #     name: String,
      #     url: String,
      #     description: String,
      #     homepage: String,
      #   },
      #   commits: Array,
      #   total_commits_count: Fixnum,
      #   push_options: Hash
      # }
      #
      # rubocop:disable Metrics/ParameterLists
      def build(
        project:, user:, ref:, oldrev: nil, newrev: nil,
        commits: [], commits_count: nil, message: nil, push_options: {},
        with_changed_files: true
      )
        commits = Array(commits)

        # Total commits count
        commits_count ||= commits.size

        # Get latest 20 commits ASC
        commits_limited = commits.last(20)

        # For performance purposes maximum 20 latest commits
        # will be passed as post receive hook data.
        # n+1: https://gitlab.com/gitlab-org/gitlab-foss/issues/38259
        commit_attrs = Gitlab::GitalyClient.allow_n_plus_1_calls do
          commits_limited.map do |commit|
            commit.hook_attrs(with_changed_files: with_changed_files)
          end
        end

        type = Gitlab::Git.tag_ref?(ref) ? 'tag_push' : 'push'

        # Hash to be passed as post_receive_data
        {
          object_kind: type,
          event_name: type,
          before: oldrev,
          after: newrev,
          ref: ref,
          ref_protected: project.protected_for?(ref),
          checkout_sha: checkout_sha(project.repository, newrev, ref),
          message: message,
          user_id: user.id,
          user_name: user.name,
          user_username: user.username,
          user_email: user.public_email,
          user_avatar: user.avatar_url(only_path: false),
          project_id: project.id,
          project: project.hook_attrs,
          commits: commit_attrs,
          total_commits_count: commits_count,
          push_options: push_options,
          # DEPRECATED
          repository: project.hook_attrs.slice(:name, :url, :description, :homepage,
            :git_http_url, :git_ssh_url, :visibility_level)
        }
      end

      def build_bulk(action:, ref_type:, changes:)
        {
          action: action,
          ref_count: changes.count,
          ref_type: ref_type
        }
      end

      # This method provides a sample data generated with
      # existing project and commits to test webhooks
      def build_sample(project, user, is_tag = false)
        # Use sample data if repo has no commit
        # (expect the case of test service configuration settings)
        return sample_data(is_tag) if project.empty_repo?

        ref = if is_tag
                "#{Gitlab::Git::TAG_REF_PREFIX}#{sample_tag_name(project) || DEFAULT_TAG_NAME}"
              else
                "#{Gitlab::Git::BRANCH_REF_PREFIX}#{project.default_branch}"
              end

        commits = project.repository.commits(project.default_branch.to_s, limit: 3)

        build(project: project,
          user: user,
          oldrev: commits.last&.id,
          newrev: commits.first&.id,
          ref: ref,
          commits: commits.reverse)
      end

      def sample_data(is_tag = false)
        if is_tag
          SAMPLE_DATA.merge(SAMPLE_TAG_DATA)
        else
          SAMPLE_DATA
        end
      end

      def checkout_sha(repository, newrev, ref)
        # Checkout sha is nil when we remove branch or tag
        return if Gitlab::Git.blank_ref?(newrev)

        # Find sha for tag, except when it was deleted.
        if Gitlab::Git.tag_ref?(ref)
          tag_name = Gitlab::Git.ref_name(ref)
          tag = repository.find_tag(tag_name)

          if tag
            commit = repository.commit(tag.dereferenced_target)
            commit.try(:sha)
          end
        else
          newrev
        end
      end

      def sample_tag_name(project)
        project.repository.tags_sorted_by(:name_desc, limit: 1).first&.name
      end
    end
  end
end
