require File.dirname(__FILE__) + '/../spec_helper'
require 'active_support'
require 'active_support/time'
require 'active_support/version'
require 'tzinfo' if ActiveSupport::VERSION::MAJOR == 3

module IceCube
  describe Schedule, 'using ActiveSupport' do

    before(:all) { Time.zone = 'Eastern Time (US & Canada)' }

    around(:each) do |example|
      Time.zone = 'America/Anchorage'
      orig_tz, ENV['TZ'] = ENV['TZ'], 'Pacific/Auckland'
      example.run
      ENV['TZ'] = orig_tz
    end

    it 'works with a single recurrence time starting from a TimeWithZone' do
      schedule = Schedule.new(t0 = Time.zone.parse("2010-02-05 05:00:00"))
      schedule.add_recurrence_time t0
      expect(schedule.all_occurrences).to eq([t0])
    end

    it 'works with a monthly recurrence rule starting from a TimeWithZone' do
      schedule = Schedule.new(Time.zone.parse("2010-02-05 05:00:00"))
      schedule.add_recurrence_rule Rule.monthly
      expect(schedule.first(10)).to eq([
        Time.zone.parse("2010-02-05 05:00"), Time.zone.parse("2010-03-05 05:00"),
        Time.zone.parse("2010-04-05 05:00"), Time.zone.parse("2010-05-05 05:00"),
        Time.zone.parse("2010-06-05 05:00"), Time.zone.parse("2010-07-05 05:00"),
        Time.zone.parse("2010-08-05 05:00"), Time.zone.parse("2010-09-05 05:00"),
        Time.zone.parse("2010-10-05 05:00"), Time.zone.parse("2010-11-05 05:00")
      ])
    end

    it 'works with a monthly schedule converting to UTC across DST' do
      Time.zone = 'Eastern Time (US & Canada)'
      schedule = Schedule.new(Time.zone.parse("2009-10-28 19:30:00"))
      schedule.add_recurrence_rule Rule.monthly
      expect(schedule.first(7).map { |d| d.getutc }).to eq([
        Time.utc(2009, 10, 28, 23, 30, 0), Time.utc(2009, 11, 29,  0, 30, 0),
        Time.utc(2009, 12, 29,  0, 30, 0), Time.utc(2010,  1, 29,  0, 30, 0),
        Time.utc(2010,  3,  1,  0, 30, 0), Time.utc(2010,  3, 28, 23, 30, 0),
        Time.utc(2010,  4, 28, 23, 30, 0)
      ])
    end

    it 'can round trip TimeWithZone to YAML' do
      schedule = Schedule.new(t0 = Time.zone.parse("2010-02-05 05:00:00"))
      schedule.add_recurrence_time t0
      schedule2 = Schedule.from_yaml(schedule.to_yaml)
      expect(schedule.all_occurrences).to eq(schedule2.all_occurrences)
    end

    it 'uses local zone from start time to determine occurs_on? from the beginning of day' do
      schedule = Schedule.new(Time.local(2009, 2, 7, 23, 59, 59))
      schedule.add_recurrence_rule Rule.daily
      expect(schedule.occurs_on?(Date.new(2009, 2, 7))).to be_truthy
    end

    it 'uses local zone from start time to determine occurs_on? to the end of day' do
      schedule = Schedule.new(Time.local(2009, 2, 7, 0, 0, 0))
      schedule.add_recurrence_rule Rule.daily
      expect(schedule.occurs_on?(Date.new(2009, 2, 7))).to be_truthy
    end

    it 'should use the correct zone for next_occurrences before start_time' do
      future_time = Time.zone.now.beginning_of_day + IceCube::ONE_DAY
      schedule = Schedule.new(future_time)
      schedule.add_recurrence_rule Rule.daily
      expect(schedule.next_occurrence.time_zone).to eq(schedule.start_time.time_zone)
    end

    it 'should use the correct zone for next_occurrences after start_time' do
      past_time = Time.zone.now.beginning_of_day
      schedule = Schedule.new(past_time)
      schedule.add_recurrence_rule Rule.daily
      expect(schedule.next_occurrence.time_zone).to eq(schedule.start_time.time_zone)
    end

    describe 'querying with time arguments for a different zone' do

      let(:schedule) do
        utc = Time.utc(2013, 1, 1).in_time_zone('UTC')
        Schedule.new(utc) { |s| s.add_recurrence_rule Rule.daily.count(3) }
      end

      let(:reference_time) do
        Time.utc(2013, 1, 1).in_time_zone('Bern') # +01:00
      end

      it 'uses schedule zone for next_occurrence' do
        next_occurrence = schedule.next_occurrence(reference_time)
        expect(next_occurrence).to eq(Time.utc(2013, 1, 2))
        expect(next_occurrence.time_zone).to eq(schedule.start_time.time_zone)
      end

      it 'uses schedule zone for next_occurrences' do
        next_occurrences = schedule.next_occurrences(2, reference_time)
        expect(next_occurrences).to eq([Time.utc(2013, 1, 2), Time.utc(2013, 1, 3)])
        next_occurrences.each do |t|
          expect(t.time_zone).to eq(schedule.start_time.time_zone)
        end
      end

      it 'uses schedule zone for remaining_occurrences' do
        remaining_occurrences = schedule.remaining_occurrences(reference_time + IceCube::ONE_DAY)
        expect(remaining_occurrences).to eq([Time.utc(2013, 1, 2), Time.utc(2013, 1, 3)])
        remaining_occurrences.each do |t|
          expect(t.time_zone).to eq(schedule.start_time.time_zone)
        end
      end

      it 'uses schedule zone for occurrences' do
        occurrences = schedule.occurrences(reference_time + IceCube::ONE_DAY)
        expect(occurrences).to eq([Time.utc(2013, 1, 1), Time.utc(2013, 1, 2)])
        occurrences.each do |t|
          expect(t.time_zone).to eq(schedule.start_time.time_zone)
        end
      end

      it 'uses schedule zone for occurrences_between' do
        occurrences_between = schedule.occurrences_between(reference_time, reference_time + IceCube::ONE_DAY)
        expect(occurrences_between).to eq([Time.utc(2013, 1, 1), Time.utc(2013, 1, 2)])
        occurrences_between.each do |t|
          expect(t.time_zone).to eq(schedule.start_time.time_zone)
        end
      end

      it "uses schedule zone for occurrences_between with a rule terminated by #count" do
        utc = Time.utc(2013, 1, 1).in_time_zone('UTC')
        schedule = Schedule.new(utc) { |s| s.add_recurrence_rule Rule.daily.count(3) }
        occurrences_between = schedule.occurrences_between(reference_time, reference_time + IceCube::ONE_DAY)
        expect(occurrences_between).to eq([Time.utc(2013, 1, 1), Time.utc(2013, 1, 2)])
        occurrences_between.each do |t|
          expect(t.time_zone).to eq(schedule.start_time.time_zone)
        end
      end

      it "uses schedule zone for occurrences_between with a rule terminated by #until" do
        utc = Time.utc(2013, 1, 1).in_time_zone('UTC')
        schedule = Schedule.new(utc) { |s| s.add_recurrence_rule Rule.daily.until(utc.advance(:days => 3)) }
        occurrences_between = schedule.occurrences_between(reference_time, reference_time + IceCube::ONE_DAY)
        expect(occurrences_between).to eq([Time.utc(2013, 1, 1), Time.utc(2013, 1, 2)])
        occurrences_between.each do |t|
          expect(t.time_zone).to eq(schedule.start_time.time_zone)
        end
      end

      it "uses schedule zone for occurrences_between with an unterminated rule" do
        utc = Time.utc(2013, 1, 1).in_time_zone('UTC')
        schedule = Schedule.new(utc) { |s| s.add_recurrence_rule Rule.daily }
        occurrences_between = schedule.occurrences_between(reference_time, reference_time + IceCube::ONE_DAY)
        expect(occurrences_between).to eq([Time.utc(2013, 1, 1), Time.utc(2013, 1, 2)])
        occurrences_between.each do |t|
          expect(t.time_zone).to eq(schedule.start_time.time_zone)
        end
      end

    end
  end
end

describe IceCube::Occurrence do

  it 'can be subtracted from a time' do
    start_time = Time.now
    occurrence = Occurrence.new(start_time)

    difference = (start_time + 60) - occurrence
    expect(difference).to eq(60)
  end

end