using SantaClausInc.Core;

namespace SantaClausInc.Test;

public sealed class GoodAndNaughtyListTests
{
    [Theory]
    [InlineData(-10, 0, "very naughty")]
    [InlineData(0, 0, "boring child")]
    [InlineData(1.4D, 2, "floored to next whole number")]
    [InlineData(0.65D, 0, "not good enough to get a present")]
    [InlineData(0.7D, 1, "good enough for a single present")]
    [InlineData(5.4D, 8, "best child ever")]
    public void CalcParcels(double goodOrNaughty, int expected, string reason)
    {
        GoodAndNaughtyList.CalcParcels(goodOrNaughty)
                          .Should().Be(expected, reason);
    }

    [Fact]
    public void GetAllCities_Simple()
    {
        var list = new GoodAndNaughtyList(SampleData.CreateMinimalSampleChildren());

        var cities = list.GetAllCities();

        cities.Count.Should().Be(2, "two cities");
        (cities[0], cities[1]).Should().Be(("Linz", "Leonding"));
    }

    [Fact]
    public void GetAllCities_DistinctResults()
    {
        var list = new GoodAndNaughtyList(SampleData.CreateSampleChildren());

        var cities = list.GetAllCities();

        cities.Count.Should().Be(3, "three distinct cities, skip duplicates");
        (cities[0], cities[1], cities[2]).Should().Be(("Linz", "Leonding", "Steyr"));
    }

    [Fact]
    public void GetAllCities_Empty()
    {
        var list = new GoodAndNaughtyList(new List<ChildInfo>());

        var cities = list.GetAllCities();

        cities.Count.Should().Be(0, "empty list of children");
    }

    [Fact]
    public void GetChildrenByCity_Simple()
    {
        var list = new GoodAndNaughtyList(SampleData.CreateSampleChildren());

        var children = list.GetChildrenByCity("Linz");

        children.Count.Should().Be(5, "five kids live in Linz");
    }

    [Fact]
    public void GetChildrenByCity_None()
    {
        var list = new GoodAndNaughtyList(SampleData.CreateSampleChildren());

        var children = list.GetChildrenByCity("Hintertupfing");

        children.Should().NotBeNull();
        children.Count.Should().Be(0, "five kids live in Linz");
    }
}