# frozen_string_literal: true

class Admin::ReportsController < Admin::StaffController
  def index
    reports_methods =
      ["page_view_total_reqs"] +
        ApplicationRequest
          .req_types
          .keys
          .select { |r| r =~ /^page_view_/ && r !~ /mobile/ }
          .map { |r| r + "_reqs" } +
        Report.singleton_methods.grep(/^report_(?!about|storage_stats)/)

    reports =
      reports_methods.map do |name|
        type = name.to_s.gsub("report_", "")
        description = I18n.t("reports.#{type}.description", default: "")
        description_link = I18n.t("reports.#{type}.description_link", default: "")

        {
          type: type,
          title: I18n.t("reports.#{type}.title"),
          description: description.presence ? description : nil,
          description_link: description_link.presence ? description_link : nil,
        }
      end

    render_json_dump(reports: reports.sort_by { |report| report[:title] })
  end

  def bulk
    reports = []

    hijack do
      params[:reports].each do |report_type, report_params|
        args = parse_params(report_params)

        report = nil
        report = Report.find_cached(report_type, args) if (report_params[:cache])

        if report
          reports << report
        else
          report = Report.find(report_type, args)

          Report.cache(report) if (report_params[:cache]) && report

          if report.blank?
            report = Report._get(report_type, args)
            report.error = :not_found
          end

          reports << report
        end
      end

      render_json_dump(reports: reports)
    end
  end

  def show
    report_type = params[:type]

    raise Discourse::NotFound unless report_type =~ /^[a-z0-9\_]+$/

    args = parse_params(params)

    report = nil
    report = Report.find_cached(report_type, args) if (params[:cache])

    return render_json_dump(report: report) if report

    hijack do
      report = Report.find(report_type, args)

      raise Discourse::NotFound if report.blank?

      Report.cache(report) if (params[:cache])

      render_json_dump(report: report)
    end
  end

  private

  def parse_params(report_params)
    begin
      start_date =
        (
          if report_params[:start_date].present?
            Time.parse(report_params[:start_date]).to_date
          else
            1.days.ago
          end
        ).beginning_of_day
      end_date =
        (
          if report_params[:end_date].present?
            Time.parse(report_params[:end_date]).to_date
          else
            start_date + 30.days
          end
        ).end_of_day
    rescue ArgumentError => e
      raise Discourse::InvalidParameters.new(e.message)
    end

    facets = nil
    facets = report_params[:facets].map { |s| s.to_s.to_sym } if Array === report_params[:facets]

    limit = nil
    if report_params.has_key?(:limit) && report_params[:limit].to_i > 0
      limit = report_params[:limit].to_i
    end

    filters = nil
    filters = report_params[:filters] if report_params.has_key?(:filters)

    { start_date: start_date, end_date: end_date, filters: filters, facets: facets, limit: limit }
  end
end