# frozen_string_literal: true

class Projects::GraphsController < Projects::ApplicationController
  include ExtractsPath
  include RedisTracking

  # Authorize
  before_action :require_non_empty_project
  before_action :assign_ref_vars
  before_action :authorize_read_repository_graphs!

  track_redis_hll_event :charts, name: 'p_analytics_repo'

  feature_category :source_code_management, [:show, :commits, :languages, :charts]
  urgency :low, [:show]

  feature_category :continuous_integration, [:ci]

  def show
    respond_to do |format|
      format.html
      format.json do
        fetch_graph
      end
    end
  end

  def commits
    redirect_to action: 'charts'
  end

  def languages
    redirect_to action: 'charts'
  end

  def charts
    get_commits
    get_languages
    get_daily_coverage_options
  end

  def ci
    redirect_to charts_project_pipelines_path(@project)
  end

  private

  def get_commits
    @commits_limit = 2000
    @commits = @project.repository.commits(@ref, limit: @commits_limit, skip_merges: true)
    @commits_graph = Gitlab::Graphs::Commits.new(@commits)
    @commits_per_week_days = @commits_graph.commits_per_week_days
    @commits_per_time = @commits_graph.commits_per_time
    @commits_per_month = @commits_graph.commits_per_month
  end

  def get_languages
    @languages =
      ::Projects::RepositoryLanguagesService.new(@project, current_user).execute.map do |lang|
        { value: lang.share, label: lang.name, color: lang.color, highlight: lang.color }
      end
  end

  def get_daily_coverage_options
    return unless can?(current_user, :read_build_report_results, project)

    date_today = Date.current
    report_window = ::Ci::DailyBuildGroupReportResultsFinder::REPORT_WINDOW

    @daily_coverage_options = {
      base_params: {
        start_date: date_today - report_window,
        end_date: date_today,
        ref_path: @project.repository.expand_ref(@ref),
        param_type: 'coverage'
      },
      download_path: namespace_project_ci_daily_build_group_report_results_path(
        namespace_id: @project.namespace,
        project_id: @project,
        format: :csv
      ),
      graph_api_path: namespace_project_ci_daily_build_group_report_results_path(
        namespace_id: @project.namespace,
        project_id: @project,
        format: :json
      )
    }
  end

  def fetch_graph
    @commits = @project.repository.commits(@ref, limit: 6000, skip_merges: true)
    @log = []

    @commits.each do |commit|
      @log << {
        author_name: commit.author_name,
        author_email: commit.author_email,
        date: commit.committed_date.strftime("%Y-%m-%d")
      }
    end

    render json: @log.to_json
  end
end
