# frozen_string_literal: true

module API
  class Issues < ::API::Base
    include ::API::Concerns::AiWorkflowsAccess
    include ::API::Concerns::McpAccess
    include APIGuard
    include PaginationParams

    allow_ai_workflows_access
    allow_mcp_access_read
    allow_mcp_access_create

    helpers Helpers::IssuesHelpers
    helpers SpammableActions::CaptchaCheck::RestApiActionsSupport

    before { authenticate_non_get! }

    feature_category :team_planning
    urgency :low

    helpers do
      params :negatable_issue_filter_params do
        optional :labels, type: Array[String], coerce_with: ::API::Validations::Types::CommaSeparatedToArray.coerce, desc: 'Comma-separated list of label names'
        optional :milestone, type: String, desc: 'Milestone title'
        optional :milestone_id, types: String, values: %w[Any None Upcoming Started],
          desc: 'Return issues assigned to milestones without the specified timebox value ("Any", "None", "Upcoming" or "Started")'
        mutually_exclusive :milestone_id, :milestone

        optional :iids, type: Array[Integer], coerce_with: ::API::Validations::Types::CommaSeparatedToIntegerArray.coerce, desc: 'The IID array of issues'

        optional :author_id, type: Integer, desc: 'Return issues which are not authored by the user with the given ID'
        optional :author_username, type: String, desc: 'Return issues which are not authored by the user with the given username'
        mutually_exclusive :author_id, :author_username

        optional :assignee_id, type: Integer, desc: 'Return issues which are not assigned to the user with the given ID'
        optional :assignee_username, type: Array[String], check_assignees_count: true,
          coerce_with: Validations::Validators::CheckAssigneesCount.coerce,
          desc: 'Return issues which are not assigned to the user with the given username'
        mutually_exclusive :assignee_id, :assignee_username

        use :negatable_issue_filter_params_ee
      end

      params :issues_stats_params do
        optional :labels, type: Array[String], coerce_with: ::API::Validations::Types::CommaSeparatedToArray.coerce, desc: 'Comma-separated list of label names'
        optional :milestone, type: String, desc: 'Milestone title'
        # 'milestone_id' only accepts wildcard values 'Any', 'None', 'Upcoming', 'Started'
        # the param has '_id' in the name to keep consistency (ex. assignee_id accepts id and wildcard values).
        optional :milestone_id, types: String, values: %w[Any None Upcoming Started],
          desc: 'Return issues assigned to milestones with the specified timebox value ("Any", "None", "Upcoming" or "Started")'
        optional :iids, type: Array[Integer], coerce_with: ::API::Validations::Types::CommaSeparatedToIntegerArray.coerce, desc: 'The IID array of issues'
        optional :search, type: String, desc: 'Search issues for text present in the title, description, or any combination of these'
        optional :in, type: String, desc: '`title`, `description`, or a string joining them with comma'
        mutually_exclusive :milestone_id, :milestone

        optional :author_id, type: Integer, desc: 'Return issues which are authored by the user with the given ID'
        optional :author_username, type: String, desc: 'Return issues which are authored by the user with the given username'
        mutually_exclusive :author_id, :author_username

        optional :assignee_id, types: [Integer, String], integer_none_any: true,
          desc: 'Return issues which are assigned to the user with the given ID'
        optional :assignee_username, type: Array[String], check_assignees_count: true,
          coerce_with: Validations::Validators::CheckAssigneesCount.coerce,
          desc: 'Return issues which are assigned to the user with the given username'
        mutually_exclusive :assignee_id, :assignee_username

        optional :created_after, type: DateTime, desc: 'Return issues created after the specified time'
        optional :created_before, type: DateTime, desc: 'Return issues created before the specified time'
        optional :updated_after, type: DateTime, desc: 'Return issues updated after the specified time'
        optional :updated_before, type: DateTime, desc: 'Return issues updated before the specified time'

        optional :not, type: Hash, desc: 'Filters by the specified parameters' do
          use :negatable_issue_filter_params
        end

        optional :scope, type: String, values: %w[created-by-me assigned-to-me created_by_me assigned_to_me all],
          desc: 'Return issues for the given scope: `created_by_me`, `assigned_to_me` or `all`'
        optional :my_reaction_emoji, type: String, desc: 'Return issues reacted by the authenticated user by the given emoji'
        optional :confidential, type: Boolean, desc: 'Filter confidential or public issues'

        use :issues_stats_params_ee
      end

      params :issues_params do
        optional :with_labels_details, type: Boolean, desc: 'Return titles of labels and other details', default: false
        optional :state, type: String, values: %w[opened closed all], default: 'all',
          desc: 'Return opened, closed, or all issues'
        optional :closed_by_id, type: Integer, desc: 'Return issues which were closed by the user with the given ID.'
        optional :order_by, type: String, values: Helpers::IssuesHelpers.sort_options, default: 'created_at',
          desc: 'Return issues ordered by `created_at`, `due_date`, `label_priority`, `milestone_due`, `popularity`, `priority`, `relative_position`, `title`, or `updated_at` fields.'
        optional :sort, type: String, values: %w[asc desc], default: 'desc',
          desc: 'Return issues sorted in `asc` or `desc` order.'
        optional :due_date, type: String, values: %w[0 any today tomorrow overdue week month next_month_and_previous_two_weeks] << '',
          desc: 'Return issues that have no due date (`0`), or whose due date is this week, this month, between two weeks ago and next month, or which are overdue. Accepts: `overdue`, `week`, `month`, `next_month_and_previous_two_weeks`, `0`'
        optional :issue_type, type: String, values: WorkItems::Type.allowed_types_for_issues, desc: "The type of the issue. Accepts: #{WorkItems::Type.allowed_types_for_issues.join(', ')}"
        use :issues_stats_params
        use :pagination
      end

      params :issue_params do
        optional :description, type: String, desc: 'The description of an issue'
        optional :assignee_ids, type: Array[Integer], coerce_with: ::API::Validations::Types::CommaSeparatedToIntegerArray.coerce, desc: 'The array of user IDs to assign issue'
        optional :assignee_id,  type: Integer, desc: '[Deprecated] The ID of a user to assign issue'
        optional :milestone_id, type: Integer, desc: 'The ID of a milestone to assign issue'
        optional :labels, type: Array[String], coerce_with: ::API::Validations::Types::CommaSeparatedToArray.coerce, desc: 'Comma-separated list of label names'
        optional :add_labels, type: Array[String], coerce_with: ::API::Validations::Types::CommaSeparatedToArray.coerce, desc: 'Comma-separated list of label names'
        optional :remove_labels, type: Array[String], coerce_with: ::API::Validations::Types::CommaSeparatedToArray.coerce, desc: 'Comma-separated list of label names'
        optional :due_date, type: String, desc: 'Date string in the format YEAR-MONTH-DAY'
        optional :confidential, type: Boolean, desc: 'Boolean parameter if the issue should be confidential', allow_blank: false
        optional :discussion_locked, type: Boolean, desc: " Boolean parameter indicating if the issue's discussion is locked"
        optional :issue_type, type: String, values: WorkItems::Type.allowed_types_for_issues, desc: "The type of the issue. Accepts: #{WorkItems::Type.allowed_types_for_issues.join(', ')}"

        use :optional_issue_params_ee
      end
    end

    desc "Get currently authenticated user's issues statistics"
    params do
      use :issues_stats_params
      optional :scope, type: String, values: %w[created_by_me assigned_to_me all], default: 'created_by_me',
        desc: 'Return issues for the given scope: `created_by_me`, `assigned_to_me` or `all`'
    end
    get '/issues_statistics' do
      authenticate! unless params[:scope] == 'all'
      validate_search_rate_limit! if declared_params[:search].present?

      present issues_statistics, with: Grape::Presenters::Presenter
    end

    resource :issues do
      desc "Get currently authenticated user's issues" do
        success Entities::Issue
      end
      params do
        use :issues_params
        optional :scope, type: String, values: %w[created-by-me assigned-to-me created_by_me assigned_to_me all], default: 'created_by_me',
          desc: 'Return issues for the given scope: `created_by_me`, `assigned_to_me` or `all`'
        optional :non_archived, type: Boolean, default: true,
          desc: 'Return issues from non archived projects'
      end
      get do
        authenticate! unless params[:scope] == 'all'
        validate_search_rate_limit! if declared_params[:search].present?
        issues = paginate(find_issues)
        issues = Ability.issues_readable_by_user(issues, current_user)

        options = {
          with: Entities::Issue,
          with_labels_details: declared_params[:with_labels_details],
          current_user: current_user,
          include_subscribed: false
        }

        present issues, options
      end

      desc "Get specified issue (admin only)" do
        success Entities::Issue
      end
      params do
        requires :id, type: String, desc: 'The ID of the Issue'
      end
      get ":id" do
        authenticated_as_admin!
        issue = Issue.find(params['id'])

        present issue, with: Entities::Issue, current_user: current_user, project: issue.project
      end
    end

    params do
      requires :id, type: String, desc: 'The ID of a group'
    end
    resource :groups, requirements: API::NAMESPACE_OR_PROJECT_REQUIREMENTS do
      desc 'Get a list of group issues' do
        success Entities::Issue
      end
      params do
        use :issues_params
        optional :non_archived, type: Boolean, desc: 'Return issues from non archived projects', default: true
      end
      get ":id/issues" do
        validate_search_rate_limit! if declared_params[:search].present?
        issues = paginate(find_issues(group_id: user_group.id, include_subgroups: true))

        options = {
          with: Entities::Issue,
          with_labels_details: declared_params[:with_labels_details],
          current_user: current_user,
          include_subscribed: false,
          group: user_group
        }

        present issues, options
      end

      desc 'Get statistics for the list of group issues'
      params do
        use :issues_stats_params
      end
      get ":id/issues_statistics" do
        validate_search_rate_limit! if declared_params[:search].present?

        present issues_statistics(group_id: user_group.id, include_subgroups: true), with: Grape::Presenters::Presenter
      end
    end

    params do
      requires :id, types: [String, Integer], desc: 'The ID or URL-encoded path of the project'
    end
    resource :projects, requirements: API::NAMESPACE_OR_PROJECT_REQUIREMENTS do
      include TimeTrackingEndpoints

      desc 'Get a list of project issues' do
        success Entities::Issue
      end
      params do
        use :issues_params
        optional :cursor, type: String, desc: 'Cursor for obtaining the next set of records'
      end
      route_setting :authentication, job_token_allowed: true
      route_setting :authorization,
        job_token_policies: :read_work_items,
        allow_public_access_for_enabled_project_features: :issues
      get ":id/issues" do
        validate_search_rate_limit! if declared_params[:search].present?

        if declared_params[:order_by] && Issue.supported_keyset_orderings.keys
                                              .exclude?(declared_params[:order_by].to_sym)
          params.delete("pagination")
        end

        issues = find_issues(project_id: user_project.id)

        options = {
          with: Entities::Issue,
          with_labels_details: declared_params[:with_labels_details],
          current_user: current_user,
          project: user_project,
          include_subscribed: false
        }

        present paginate_with_strategies(issues), options
      end

      desc 'Get statistics for the list of project issues'
      params do
        use :issues_stats_params
      end
      get ":id/issues_statistics" do
        validate_search_rate_limit! if declared_params[:search].present?

        present issues_statistics(project_id: user_project.id), with: Grape::Presenters::Presenter
      end

      desc 'Get a single project issue' do
        success Entities::Issue
      end
      params do
        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
      end
      route_setting :mcp, tool_name: :get_issue, params: [:id, :issue_iid]
      route_setting :authentication, job_token_allowed: true
      route_setting :authorization,
        job_token_policies: :read_work_items,
        allow_public_access_for_enabled_project_features: :issues
      get ":id/issues/:issue_iid", as: :api_v4_project_issue do
        issue = find_project_issue(params[:issue_iid])
        present issue, with: Entities::Issue, current_user: current_user, project: user_project
      end

      desc 'Create a new project issue' do
        success Entities::Issue
      end
      params do
        requires :title, type: String, desc: 'The title of an issue'
        optional :created_at, type: DateTime,
          desc: 'Date time when the issue was created. Available only for admins and project owners.'
        optional :merge_request_to_resolve_discussions_of, type: Integer,
          desc: 'The IID of a merge request for which to resolve discussions'
        optional :discussion_to_resolve, type: String,
          desc: 'The ID of a discussion to resolve, also pass `merge_request_to_resolve_discussions_of`'
        optional :iid, type: Integer,
          desc: 'The internal ID of a project issue. Available only for admins and project owners.'

        use :issue_params
      end
      route_setting :mcp, tool_name: :create_issue, params: Helpers::IssuesHelpers.create_issue_mcp_params
      route_setting :authorization, permissions: :create_issue, boundary_type: :project
      post ':id/issues' do
        Gitlab::QueryLimiting.disable!('https://gitlab.com/gitlab-org/gitlab/-/issues/21140')

        authorize! :create_issue, user_project

        issue_params = declared_params(include_missing: false)

        issue_params = convert_parameters_from_legacy_format(issue_params)

        begin
          result = ::Issues::CreateService.new(container: user_project,
            current_user: current_user,
            params: issue_params).execute

          if result.success?
            present result[:issue], with: Entities::Issue, current_user: current_user, project: user_project
          elsif result[:issue]
            issue = result[:issue]

            with_captcha_check_rest_api(spammable: issue) do
              render_validation_error!(issue)
            end
          else
            render_api_error!(result.errors.join(', '), result.http_status || 422)
          end
        rescue ::ActiveRecord::RecordNotUnique
          render_api_error!('Duplicated issue', 409)
        rescue ::Issues::BaseService::EpicAssignmentError => error
          render_api_error!(error.message, 422)
        end
      end

      desc 'Update an existing issue' do
        success Entities::Issue
      end
      params do
        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
        optional :title, type: String, desc: 'The title of an issue'
        optional :updated_at, type: DateTime,
          allow_blank: false,
          desc: 'Date time when the issue was updated. Available only for admins and project owners.'
        optional :state_event, type: String, values: %w[reopen close], desc: 'State of the issue'
        use :issue_params

        at_least_one_of(*Helpers::IssuesHelpers.update_params_at_least_one_of)
      end
      # rubocop: disable CodeReuse/ActiveRecord
      put ':id/issues/:issue_iid' do
        Gitlab::QueryLimiting.disable!('https://gitlab.com/gitlab-org/gitlab/-/issues/20775')

        issue = user_project.issues.find_by!(iid: params.delete(:issue_iid))
        authorize! :update_issue, issue

        update_params = declared_params(include_missing: false)

        update_params = convert_parameters_from_legacy_format(update_params)

        issue = ::Issues::UpdateService.new(container: user_project,
          current_user: current_user,
          params: update_params,
          perform_spam_check: true).execute(issue)

        if issue.valid?
          present issue, with: Entities::Issue, current_user: current_user, project: user_project
        else
          with_captcha_check_rest_api(spammable: issue) do
            render_validation_error!(issue)
          end
        end
      end
      # rubocop: enable CodeReuse/ActiveRecord

      desc 'Reorder an existing issue' do
        success Entities::Issue
      end
      params do
        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
        optional :move_after_id, type: Integer, desc: 'The ID of the issue we want to be after'
        optional :move_before_id, type: Integer, desc: 'The ID of the issue we want to be before'
        at_least_one_of :move_after_id, :move_before_id
      end
      # rubocop: disable CodeReuse/ActiveRecord
      put ':id/issues/:issue_iid/reorder' do
        issue = user_project.issues.find_by(iid: params[:issue_iid])
        not_found!('Issue') unless issue

        authorize! :update_issue, issue

        if ::Issues::ReorderService.new(container: user_project, current_user: current_user, params: params).execute(issue)
          present issue, with: Entities::Issue, current_user: current_user, project: user_project
        else
          render_api_error!({ error: 'Unprocessable Entity' }, 422)
        end
      end
      # rubocop: enable CodeReuse/ActiveRecord

      desc 'Move an existing issue' do
        success Entities::Issue
      end
      params do
        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
        requires :to_project_id, type: Integer, desc: 'The ID of the new project'
      end
      # rubocop: disable CodeReuse/ActiveRecord
      post ':id/issues/:issue_iid/move' do
        Gitlab::QueryLimiting.disable!('https://gitlab.com/gitlab-org/gitlab/-/issues/20776', new_threshold: 260)

        issue = user_project.issues.find_by(iid: params[:issue_iid])
        not_found!('Issue') unless issue

        new_project = Project.find_by(id: params[:to_project_id])
        not_found!('Project') unless new_project

        begin
          response = ::WorkItems::DataSync::MoveService.new(
            work_item: issue, current_user: current_user, target_namespace: new_project.project_namespace
          ).execute

          render_api_error!(response.message, 400) if response.error?

          issue = response.payload[:work_item]

          present issue, with: Entities::Issue, current_user: current_user, project: user_project
        end
      end
      # rubocop: enable CodeReuse/ActiveRecord

      desc 'Clone an existing issue' do
        success Entities::Issue
      end
      params do
        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
        requires :to_project_id, type: Integer, desc: 'The ID of the new project'
        optional :with_notes, type: Boolean, desc: 'Clone issue with notes', default: false
      end
      # rubocop: disable CodeReuse/ActiveRecord
      post ':id/issues/:issue_iid/clone' do
        Gitlab::QueryLimiting.disable!('https://gitlab.com/gitlab-org/gitlab/-/issues/340252')

        issue = user_project.issues.find_by(iid: params[:issue_iid])
        not_found!('Issue') unless issue

        target_project = Project.find_by(id: params[:to_project_id])
        not_found!('Project') unless target_project

        begin
          response = ::WorkItems::DataSync::CloneService.new(
            work_item: issue, current_user: current_user, target_namespace: target_project.project_namespace,
            params: { clone_with_notes: params[:with_notes] }
          ).execute

          render_api_error!(response.message, 400) if response.error?

          issue = response.payload[:work_item]

          present issue, with: Entities::Issue, current_user: current_user, project: target_project
        end
      end
      # rubocop: enable CodeReuse/ActiveRecord

      desc 'Delete a project issue'
      params do
        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
      end
      # rubocop: disable CodeReuse/ActiveRecord
      delete ":id/issues/:issue_iid" do
        issue = user_project.issues.find_by(iid: params[:issue_iid])
        not_found!('Issue') unless issue

        authorize!(:destroy_issue, issue)

        destroy_conditionally!(issue) do |issue|
          ::Issues::DestroyService.new(container: user_project, current_user: current_user).execute(issue)
        end
      end
      # rubocop: enable CodeReuse/ActiveRecord

      desc 'List merge requests that are related to the issue' do
        success Entities::MergeRequestBasic
      end
      params do
        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
      end
      get ':id/issues/:issue_iid/related_merge_requests' do
        issue = find_project_issue(params[:issue_iid])

        merge_requests = ::Issues::ReferencedMergeRequestsService
                           .new(container: user_project, current_user: current_user)
                           .execute(issue)
                           .first

        present paginate(::Kaminari.paginate_array(merge_requests)),
          with: Entities::MergeRequest,
          current_user: current_user,
          project: user_project,
          include_subscribed: false
      end

      desc 'List merge requests closing issue' do
        success Entities::MergeRequestBasic
      end
      params do
        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
      end
      # rubocop: disable CodeReuse/ActiveRecord
      get ':id/issues/:issue_iid/closed_by' do
        issue = find_project_issue(params[:issue_iid])

        merge_request_ids = MergeRequestsClosingIssues.where(issue_id: issue).select(:merge_request_id)
        merge_requests = MergeRequestsFinder.new(current_user, project_id: user_project.id).execute.where(id: merge_request_ids)

        present paginate(merge_requests), with: Entities::MergeRequestBasic, current_user: current_user, project: user_project
      end
      # rubocop: enable CodeReuse/ActiveRecord

      desc 'List participants for an issue' do
        success Entities::UserBasic
      end
      params do
        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
      end
      get ':id/issues/:issue_iid/participants' do
        issue = find_project_issue(params[:issue_iid])
        participants = ::Kaminari.paginate_array(issue.visible_participants(current_user))

        present paginate(participants), with: Entities::UserBasic, current_user: current_user, project: user_project
      end

      desc 'Get the user agent details for an issue' do
        success Entities::UserAgentDetail
      end
      params do
        requires :issue_iid, type: Integer, desc: 'The internal ID of a project issue'
      end
      get ":id/issues/:issue_iid/user_agent_detail" do
        authenticated_as_admin!

        issue = find_project_issue(params[:issue_iid])

        break not_found!('UserAgentDetail') unless issue.user_agent_detail

        present issue.user_agent_detail, with: Entities::UserAgentDetail
      end
    end
  end
end

API::Issues.prepend_mod_with('API::Issues')
