require "test_helper"

class PromotionCodeTest < ActiveSupport::TestCase
  def setup
    @user = User.create!(
      email: "test@example.com",
      password: "password123",
      password_confirmation: "password123"
    )

    @event = Event.create!(
      name: "Test Event",
      slug: "test-event",
      description: "A valid description for the test event that is long enough",
      latitude: 48.8566,
      longitude: 2.3522,
      venue_name: "Test Venue",
      venue_address: "123 Test Street",
      user: @user
    )
  end

  # Test valid promotion code creation
  def test_valid_promotion_code
    promotion_code = PromotionCode.create(
      code: "DISCOUNT10",
      discount_amount_cents: 1000, # €10.00
      expires_at: 1.month.from_now,
      active: true,
      user: @user,
      event: @event
    )

    assert promotion_code.valid?
    assert_equal "DISCOUNT10", promotion_code.code
    assert_equal 1000, promotion_code.discount_amount_cents
    assert promotion_code.active?
  end

  # Test validation for required fields
  def test_validation_for_required_fields
    promotion_code = PromotionCode.new
    refute promotion_code.valid?
    assert_not_nil promotion_code.errors[:code]
  end

  # Test unique code validation
  def test_unique_code_validation
    PromotionCode.create(code: "UNIQUE123", discount_amount_cents: 500, user: @user, event: @event)
    duplicate_code = PromotionCode.new(code: "UNIQUE123", discount_amount_cents: 500, user: @user, event: @event)
    refute duplicate_code.valid?
    assert_not_nil duplicate_code.errors[:code]
  end

  # Test discount amount validation
  def test_discount_amount_validation
    promotion_code = PromotionCode.new(code: "VALID123", discount_amount_cents: -100, user: @user, event: @event)
    refute promotion_code.valid?
    assert_not_nil promotion_code.errors[:discount_amount_cents]
  end

  # Test active scope
  def test_active_scope
    active_code = PromotionCode.create(code: "ACTIVE123", discount_amount_cents: 500, active: true, user: @user, event: @event)
    inactive_code = PromotionCode.create(code: "INACTIVE123", discount_amount_cents: 500, active: false, user: @user, event: @event)

    assert_includes PromotionCode.active, active_code
    refute_includes PromotionCode.active, inactive_code
  end

  # Test expired scope
  def test_expired_scope
    expired_code = PromotionCode.create(code: "EXPIRED123", discount_amount_cents: 500, expires_at: 1.day.ago, user: @user, event: @event)
    future_code = PromotionCode.create(code: "FUTURE123", discount_amount_cents: 500, expires_at: 1.month.from_now, user: @user, event: @event)

    assert_includes PromotionCode.expired, expired_code
    refute_includes PromotionCode.expired, future_code
  end

  # Test valid scope
  def test_valid_scope
    valid_code = PromotionCode.create(code: "VALID123", discount_amount_cents: 500, active: true, expires_at: 1.month.from_now, user: @user, event: @event)
    invalid_code = PromotionCode.create(code: "INVALID123", discount_amount_cents: 500, active: false, expires_at: 1.day.ago, user: @user, event: @event)

    assert_includes PromotionCode.valid, valid_code
    refute_includes PromotionCode.valid, invalid_code
  end

  # Test discount_amount_euros method
  def test_discount_amount_euros_converts_cents_to_euros
    promotion_code = PromotionCode.new(discount_amount_cents: 1000)
    assert_equal 10.0, promotion_code.discount_amount_euros

    promotion_code = PromotionCode.new(discount_amount_cents: 550)
    assert_equal 5.5, promotion_code.discount_amount_euros
  end

  # Test active? method
  def test_active_method
    # Active and not expired
    active_code = PromotionCode.create(
      code: "ACTIVE1",
      discount_amount_cents: 500,
      active: true,
      expires_at: 1.month.from_now,
      user: @user,
      event: @event
    )
    assert active_code.active?

    # Active but expired
    expired_active_code = PromotionCode.create(
      code: "ACTIVE2",
      discount_amount_cents: 500,
      active: true,
      expires_at: 1.day.ago,
      user: @user,
      event: @event
    )
    assert_not expired_active_code.active?

    # Inactive but not expired
    inactive_code = PromotionCode.create(
      code: "INACTIVE1",
      discount_amount_cents: 500,
      active: false,
      expires_at: 1.month.from_now,
      user: @user,
      event: @event
    )
    assert_not inactive_code.active?

    # Active with no expiration
    no_expiry_code = PromotionCode.create(
      code: "NOEXPIRY",
      discount_amount_cents: 500,
      active: true,
      expires_at: nil,
      user: @user,
      event: @event
    )
    assert no_expiry_code.active?
  end

  # Test expired? method
  def test_expired_method
    # Expired code
    expired_code = PromotionCode.create(
      code: "EXPIRED1",
      discount_amount_cents: 500,
      expires_at: 1.day.ago,
      user: @user,
      event: @event
    )
    assert expired_code.expired?

    # Future code
    future_code = PromotionCode.create(
      code: "FUTURE1",
      discount_amount_cents: 500,
      expires_at: 1.month.from_now,
      user: @user,
      event: @event
    )
    assert_not future_code.expired?

    # No expiration
    no_expiry_code = PromotionCode.create(
      code: "NOEXPIRY1",
      discount_amount_cents: 500,
      expires_at: nil,
      user: @user,
      event: @event
    )
    assert_not no_expiry_code.expired?
  end

  # Test can_be_used? method
  def test_can_be_used_method
    # Can be used: active, not expired, under usage limit
    usable_code = PromotionCode.create(
      code: "USABLE1",
      discount_amount_cents: 500,
      active: true,
      expires_at: 1.month.from_now,
      usage_limit: 10,
      uses_count: 0,
      user: @user,
      event: @event
    )
    assert usable_code.can_be_used?

    # Cannot be used: inactive
    inactive_code = PromotionCode.create(
      code: "INACTIVE2",
      discount_amount_cents: 500,
      active: false,
      expires_at: 1.month.from_now,
      usage_limit: 10,
      uses_count: 0,
      user: @user,
      event: @event
    )
    assert_not inactive_code.can_be_used?

    # Cannot be used: expired
    expired_code = PromotionCode.create(
      code: "EXPIRED2",
      discount_amount_cents: 500,
      active: true,
      expires_at: 1.day.ago,
      usage_limit: 10,
      uses_count: 0,
      user: @user,
      event: @event
    )
    assert_not expired_code.can_be_used?

    # Cannot be used: at usage limit
    limit_reached_code = PromotionCode.create(
      code: "LIMIT1",
      discount_amount_cents: 500,
      active: true,
      expires_at: 1.month.from_now,
      usage_limit: 5,
      uses_count: 5,
      user: @user,
      event: @event
    )
    assert_not limit_reached_code.can_be_used?

    # Can be used: no usage limit
    no_limit_code = PromotionCode.create(
      code: "NOLIMIT1",
      discount_amount_cents: 500,
      active: true,
      expires_at: 1.month.from_now,
      usage_limit: nil,
      uses_count: 100,
      user: @user,
      event: @event
    )
    assert no_limit_code.can_be_used?
  end

  # Test increment_uses_count callback
  def test_increment_uses_count_callback
    promotion_code = PromotionCode.create(
      code: "INCREMENT1",
      discount_amount_cents: 500,
      uses_count: 0,
      user: @user,
      event: @event
    )

    assert_equal 0, promotion_code.uses_count

    # The callback should only run on create, so we test the initial value
    new_code = PromotionCode.create(
      code: "INCREMENT2",
      discount_amount_cents: 500,
      uses_count: nil,
      user: @user,
      event: @event
    )

    assert_equal 0, new_code.uses_count
  end
end