using Numbers.NumberFactory;

namespace Numbers.Test.NumberFactory;

public sealed class PrimeNumbersTests
{
    [Fact]
    public void LowerBound()
    {
        const long LowerBound = 0;
        var numbers = Factory.Create(NumberType.Prime, LowerBound, 10);

        numbers.LowerBound.Should().Be(LowerBound);
    }

    [Fact]
    public void UpperBound()
    {
        const long UpperBound = 10;
        var numbers = Factory.Create(NumberType.Prime, 0, UpperBound);

        numbers.UpperBound.Should().Be(UpperBound);
    }

    [Fact]
    public void Count()
    {
        var numbers = Factory.Create(NumberType.Prime, 0, 10);

        numbers.Length.Should().Be(4, "2, 3, 5, 7");
    }

    [Fact]
    public void FirstIndex()
    {
        var numbers = Factory.Create(NumberType.Prime, 0, 10);

        numbers[0].Should().Be(2);
    }

    [Fact]
    public void LastIndex()
    {
        var numbers = Factory.Create(NumberType.Prime, 0, 10);

        numbers[^1].Should().Be(7);
    }

    [Theory]
    [InlineData(NumberType.Prime, 0, 10, new long[] { 2, 3, 5, 7 })]
    [InlineData(NumberType.Prime, 2, 10, new long[] { 2, 3, 5, 7 })]
    [InlineData(NumberType.Prime, 0, 7, new long[] { 2, 3, 5, 7 })]
    public void Content(NumberType type, long lower, long upper, long[] expected)
    {
        var numbers = Factory.Create(type, lower, upper);

        for (var i = 0; i < numbers.Length; i++)
        {
            numbers[i].Should().Be(expected[i]);
        }
    }

    [Fact]
    public void ForeachContent()
    {
        int i = -1;
        long[] expected = [2, 3, 5, 7];
        var numbers = Factory.Create(NumberType.Prime, 0, 10);

        foreach (long item in numbers)
        {
            i++;
            item.Should().Be(expected[i]);
        }
    }

    [Fact]
    public void ForeachContentExtended()
    {
        int i = -1;
        long[] expected =
            [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97];
        var numbers = Factory.Create(NumberType.Prime, 0, 100);

        foreach (long item in numbers)
        {
            i++;
            item.Should().Be(expected[i]);
        }
    }
}