require 'spec_helper'

describe Repor::Dimensions::TimeDimension do
  def new_dimension(dimension_params = {}, report_params = {}, opts = {})
    report_params[:dimensions] = { foo: dimension_params }
    Repor::Dimensions::TimeDimension.new(
      :foo,
      OpenStruct.new(params: report_params),
      opts
    )
  end

  def expect_error(&block)
    expect { yield }.to raise_error(Repor::InvalidParamsError)
  end

  describe 'param validation' do
    it 'yells unless :bin_width is a duration hash' do
      expect_error { new_dimension(bin_width: '') }
      expect_error { new_dimension(bin_width: 5) }
      expect_error { new_dimension(bin_width: { seconds: 'hey' }) }
      expect_error { new_dimension(bin_width: { seconds: 1, chickens: 0 }) }
      new_dimension(bin_width: { seconds: 1, minutes: 2 })
      new_dimension(bin_width: { weeks: 12, years: 7 })
    end

    it 'yells unless :bins and :only values are times' do
      expect_error { new_dimension(bins: { min: 'hey' }) }
      expect_error { new_dimension(only: { min: 'hey' }) }
      expect_error { new_dimension(only: [{ min: '2015-01-01', max: '2015-01-10' }, { min: 'chicken' }]) }
      new_dimension(bins: { min: '2015-01-01', max: '2015-01-10' })
      new_dimension(only: { min: '2015-01-01', max: '2015-01-10' })
      new_dimension(only: [nil, { min: '2015-01-01', max: '2015-01-10' }, { max: '2015-02-10' }])
    end
  end

  describe '#bin_width' do
    it 'can translate a duration hash into an ActiveSupport::Duration' do
      dimension = new_dimension(bin_width: { seconds: 10, minutes: 1 })
      expect(dimension.bin_width).to eq 70.seconds
      dimension = new_dimension(bin_width: { days: 8, weeks: 1 })
      expect(dimension.bin_width).to eq 15.days
    end

    it 'can divide the domain into :bin_count bins' do
      dimension = new_dimension(bin_count: 10, only: [{ min: '2015-01-01' }, { max: '2015-01-11' }])
      expect(dimension.bin_width).to eq 1.day
      expect(dimension.group_values.map(&:min).map(&:day)).to eq (1..10).to_a
    end

    it 'defaults to a sensical, standard duration' do
      dimension = new_dimension(only: [{ min: '2015-01-01' }, { max: '2015-01-02' }])
      expect(dimension.bin_width).to eq 1.hour
      dimension = new_dimension(only: [{ min: '2015-01-01' }, { max: '2015-01-11' }])
      expect(dimension.bin_width).to eq 1.day
      dimension = new_dimension(only: [{ min: '2015-01-01' }, { max: '2015-02-11' }])
      expect(dimension.bin_width).to eq 1.week
    end
  end
end