# frozen_string_literal: true

require 'vgcal/google/authorizer'
require 'dotenv'

# MyCalendar
module Vgcal
  class MyCalendar
    def initialize(start_date, end_date)
      @start_date = start_date
      @end_date   = end_date
    end

    def events
      service               = Google::Apis::CalendarV3::CalendarService.new
      service.authorization = Vgcal::Authorizer.new.credentials
      calendar_id           = 'primary'
      service.list_events(calendar_id,
                          max_results:   100,
                          single_events: true,
                          order_by:      'startTime',
                          time_min:      @start_date,
                          time_max:      @end_date)
    end

    # return: [["daily scrum", 0.25], ["SRE定例", 1.0], ["test", 2.0], ["task2", 1.0]]
    def tasks(events)
      tasks_hash = {}
      events.items.each do |e|
        if e.organizer.email.include?(my_email_address) && !e.summary.start_with?(*hide_words)
          if all_day_event?(e.start.date)
            tasks_hash[e.summary] = 0
          else
            task_time = (e.end.date_time - e.start.date_time).to_f * 24
            # 1日の中で同じタスク名が複数あったら時間を集計する。例.午前と午後それぞれでAプロジェクトに1時間スケジュール
            if tasks_hash[e.summary]
              tasks_hash[e.summary] += task_time
            else
              tasks_hash[e.summary] = task_time
            end
          end
        end
      end
      tasks_hash.sort.to_a
    end

    # return: [["朝会", 0.5], ["daily scrum", 0.25], ["SRE朝会", 0.5], ["定例", 1.0]]
    def invited_meetings(events)
      tasks_hash = {}
      events.items.each do |e|
        next if e.organizer.email.include?(my_email_address) || e.summary.start_with?(*hide_words)

        # 単一のカレンダー内から自分が出席返答したイベントを探して計算
        e.attendees.each do |a|
          # next unless a.email == my_email_address && (a.email != my_email_address && a.response_status == 'accepted')
          next if a.email != my_email_address || (a.email == my_email_address && a.response_status != 'accepted')

          task_time = (e.end.date_time - e.start.date_time).to_f * 24
          if tasks_hash[e.summary]
            tasks_hash[e.summary] += task_time
          else
            tasks_hash[e.summary] = task_time
          end
        end
      end
      tasks_hash.sort.to_a
    end

    private

    def my_email_address
      ENV['MY_EMAIL_ADDRESS']
    end

    def hide_words
      ['__']
    end

    def all_day_event?(date)
      # The date, in the format "yyyy-mm-dd", if this is an all-day event.
      # https://developers.google.com/calendar/api/v3/reference/events
      !!/[0-9]...-[0-9].-[0-9]./.match(date.to_s)
    end
  end
end