using PnvPanel.Application.Admin.Pricing;
using PnvPanel.Application.Common.Interfaces;
using Xunit;

namespace PnvPanel.Application.Tests.Admin.Pricing;

public class UpdatePricingSettingsCommandValidatorTests
{
    private readonly UpdatePricingSettingsCommandValidator _validator = new();

    private static UpdatePricingSettingsCommand Command(params DiscountTierDto[] tiers) =>
        new(500, 450, 400, tiers);

    [Fact]
    public void Validate_WithEmptyTiers_IsValid()
    {
        var result = _validator.Validate(Command());

        Assert.True(result.IsValid);
    }

    [Fact]
    public void Validate_WithProgressiveTiers_IsValid()
    {
        var result = _validator.Validate(Command(new DiscountTierDto(3, 5), new DiscountTierDto(6, 10)));

        Assert.True(result.IsValid);
    }

    [Fact]
    public void Validate_WithDuplicateThreshold_IsInvalid()
    {
        var result = _validator.Validate(Command(new DiscountTierDto(3, 5), new DiscountTierDto(3, 10)));

        Assert.False(result.IsValid);
    }

    [Fact]
    public void Validate_WhenHigherThresholdHasSmallerDiscount_IsInvalid()
    {
        var result = _validator.Validate(Command(new DiscountTierDto(3, 10), new DiscountTierDto(6, 5)));

        Assert.False(result.IsValid);
    }

    [Fact]
    public void Validate_WithDiscountPercentOutOfRange_IsInvalid()
    {
        var result = _validator.Validate(Command(new DiscountTierDto(3, 100)));

        Assert.False(result.IsValid);
    }

    [Fact]
    public void Validate_WithNonPositiveMinConfigs_IsInvalid()
    {
        var result = _validator.Validate(Command(new DiscountTierDto(0, 5)));

        Assert.False(result.IsValid);
    }
}