require "rails_helper"

RSpec.describe Vehicle do
  it "has a valid factory" do
    expect(build(:vehicle)).to be_valid
  end

  it "defaults to active" do
    expect(described_class.new.active).to be(true)
  end

  it "requires all fields" do
    vehicle = build(
      :vehicle,
      make: nil,
      model: nil,
      year: nil,
      color: nil,
      vin: nil,
      licence_plate: nil,
      current_odometer: nil,
      fuel_tank_size: nil,
      active: nil
    )

    expect(vehicle).not_to be_valid
    expect(vehicle.errors.attribute_names).to include(
      :make,
      :model,
      :year,
      :color,
      :vin,
      :licence_plate,
      :current_odometer,
      :fuel_tank_size,
      :active
    )
  end

  it "normalizes VIN to uppercase" do
    vehicle = build(:vehicle, vin: "abc123")

    vehicle.valid?

    expect(vehicle.vin).to eq("ABC123")
  end

  it "normalizes licence plate to uppercase" do
    vehicle = build(:vehicle, licence_plate: "kj7cyt")

    vehicle.valid?

    expect(vehicle.licence_plate).to eq("KJ7CYT")
  end

  it "requires VIN to be unique after normalization" do
    create(:vehicle, vin: "ABC123")

    vehicle = build(:vehicle, vin: "abc123")

    expect(vehicle).not_to be_valid
    expect(vehicle.errors[:vin]).to be_present
  end

  it "requires licence plate to be unique case-insensitively" do
    create(:vehicle, licence_plate: "ABC123")

    vehicle = build(:vehicle, licence_plate: "abc123")

    expect(vehicle).not_to be_valid
    expect(vehicle.errors[:licence_plate]).to be_present
  end

  it "requires a realistic year" do
    too_old = build(:vehicle, year: 1979)
    future = build(:vehicle, year: Date.current.year + 1)

    expect(too_old).not_to be_valid
    expect(future).not_to be_valid
  end

  it "requires numeric mileage and fuel tank values" do
    vehicle = build(:vehicle, current_odometer: -1, fuel_tank_size: 0)

    expect(vehicle).not_to be_valid
    expect(vehicle.errors[:current_odometer]).to be_present
    expect(vehicle.errors[:fuel_tank_size]).to be_present
  end

  it "cannot be destroyed when entries reference it" do
    vehicle = create(:vehicle)
    create(:maintenance_schedule, vehicle: vehicle)

    expect(vehicle.destroy).to be(false)
    expect(vehicle.errors[:base]).to be_present
  end
end