require "rails_helper"

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

  it "requires all fields" do
    entry = build(
      :fuel_entry,
      vehicle: nil,
      updated_by_user: nil,
      odometer: nil,
      gallons_pumped: nil,
      price_paid: nil,
      date: nil
    )

    expect(entry).not_to be_valid
    expect(entry.errors.attribute_names).to include(:vehicle, :updated_by_user, :odometer, :gallons_pumped, :price_paid, :date)
  end

  it "requires valid numeric values" do
    entry = build(:fuel_entry, odometer: -1, gallons_pumped: 0, price_paid: 0)

    expect(entry).not_to be_valid
    expect(entry.errors[:odometer]).to be_present
    expect(entry.errors[:gallons_pumped]).to be_present
    expect(entry.errors[:price_paid]).to be_present
  end

  it "rejects future dates" do
    entry = build(:fuel_entry, date: Date.current + 1.day)

    expect(entry).not_to be_valid
    expect(entry.errors[:date]).to be_present
  end

  it "rejects odometer readings below the vehicle current odometer" do
    vehicle = build(:vehicle, current_odometer: 10_000)
    entry = build(:fuel_entry, vehicle: vehicle, odometer: 9_999)

    expect(entry).not_to be_valid
    expect(entry.errors[:odometer]).to be_present
  end

  it "allows odometer readings equal to the vehicle current odometer" do
    vehicle = build(:vehicle, current_odometer: 10_000)
    entry = build(:fuel_entry, vehicle: vehicle, odometer: 10_000)

    expect(entry).to be_valid
  end

  it "allows odometer readings above the vehicle current odometer" do
    vehicle = build(:vehicle, current_odometer: 10_000)
    entry = build(:fuel_entry, vehicle: vehicle, odometer: 10_001)

    expect(entry).to be_valid
  end
end