require "test_helper"

class MeasurementsControllerTest < 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 "index returns ok" do
    get measurements_path
    assert_response :success
  end

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

  test "create records readout with taken_at" do
    taken_at = 1.day.ago.change(usec: 0)
    assert_difference -> { @user.readouts.count } do
      post measurements_path, params: {
        taken_at: taken_at.iso8601,
        readouts: [{ quantity_id: @quantity.id, value: '82.5', unit_id: @unit.id }]
      }, as: :turbo_stream
    end
    assert_response :success
    assert_equal taken_at, @user.readouts.last.taken_at
  end

  test "create with no readouts selected shows alert" do
    post measurements_path, params: { taken_at: Time.now.iso8601 }, as: :turbo_stream
    assert_response :success
  end

  test "destroy removes readout" do
    readout = @user.readouts.create!(quantity: @quantity, unit: @unit, value: 82.5, taken_at: 1.day.ago)
    assert_difference -> { @user.readouts.count }, -1 do
      delete measurement_path(readout), as: :turbo_stream
    end
    assert_response :success
  end

  test "destroy cannot remove another user's readout" do
    other_quantity = users(:bob).quantities.create!(name: 'Weight')
    other_unit = users(:bob).units.create!(symbol: 'kg')
    readout = users(:bob).readouts.create!(quantity: other_quantity, unit: other_unit, value: 70.0, taken_at: 1.day.ago)
    assert_no_difference -> { users(:bob).readouts.count } do
      delete measurement_path(readout), as: :turbo_stream
    end
  end

  test "update changes readout value" do
    readout = @user.readouts.create!(quantity: @quantity, unit: @unit, value: 82.5, taken_at: 1.day.ago)
    patch measurement_path(readout), params: {
      readout: { value: '83.0', unit_id: @unit.id, taken_at: readout.taken_at.iso8601 }
    }, as: :turbo_stream
    assert_response :success
    assert_in_delta 83.0, readout.reload.value
  end
end