require "test_helper"

class ChartsControllerTest < ActionDispatch::IntegrationTest
  setup do
    host! '127.0.0.1'
    @user = users(:alice)
    post new_user_session_path, params: { user: { email: @user.email, password: 'alice' } }
    @quantity = @user.quantities.create!(name: 'Weight')
    @unit = @user.units.create!(symbol: 'kg')
  end

  test "requires authentication" do
    delete destroy_user_session_path
    get charts_path
    assert_response :redirect
  end

  test "index returns ok" do
    get charts_path
    assert_response :success
  end

  test "embeds readout data as JSON in script tag" do
    users(:alice).readouts.create!(quantity: @quantity, unit: @unit, value: 82.5, taken_at: 1.day.ago)

    get charts_path

    assert_select 'script#charts-data[type="application/json"]' do |elements|
      data = JSON.parse(elements.first.children.first.to_s)
      assert_equal 1, data.size
      assert_equal 'Weight', data.first['quantityName']
      assert_in_delta 82.5, data.first['value']
      assert_equal 'kg', data.first['unit']
      assert_not_nil data.first['takenAt']
    end
  end

  test "orders readouts by taken_at ascending" do
    older = users(:alice).readouts.create!(quantity: @quantity, unit: @unit, value: 80.0, taken_at: 2.days.ago)
    newer = users(:alice).readouts.create!(quantity: @quantity, unit: @unit, value: 82.5, taken_at: 1.day.ago)

    get charts_path

    assert_select 'script#charts-data[type="application/json"]' do |elements|
      data = JSON.parse(elements.first.children.first.to_s)
      assert_equal older.taken_at.iso8601, data.first['takenAt']
      assert_equal newer.taken_at.iso8601, data.last['takenAt']
    end
  end

  test "does not expose other users readouts" do
    bob_quantity = users(:bob).quantities.create!(name: 'Steps')
    bob_unit = users(:bob).units.create!(symbol: 'steps')
    users(:bob).readouts.create!(quantity: bob_quantity, unit: bob_unit, value: 5000, taken_at: 1.day.ago)

    get charts_path

    assert_select 'script#charts-data[type="application/json"]' do |elements|
      data = JSON.parse(elements.first.children.first.to_s)
      assert data.none? { |r| r['quantityName'] == 'Steps' }, "Bob's data must not appear"
    end
  end
end