using System.Collections;
using System.Globalization;

namespace Velopack.Tests.TestHelpers;

public static class AssertExtensions
{
    public static void ShouldBeAboutEqualTo(this DateTimeOffset expected, DateTimeOffset current)
    {
        Assert.Equal(expected.Date, current.Date);
        Assert.Equal(expected.Offset, current.Offset);
        Assert.Equal(expected.Hour, current.Hour);
        Assert.Equal(expected.Minute, current.Minute);
        Assert.Equal(expected.Second, current.Second);
    }

    public static void ShouldBeFalse(this bool currentObject)
    {
        Assert.False(currentObject);
    }

    public static void ShouldBeNull(this object currentObject)
    {
        Assert.Null(currentObject);
    }

    public static void ShouldBeEmpty(this IEnumerable items)
    {
        Assert.Empty(items);
    }

    public static void ShouldNotBeEmpty(this IEnumerable items)
    {
        Assert.NotEmpty(items);
    }

    public static void ShouldBeTrue(this bool currentObject)
    {
        Assert.True(currentObject);
    }

    public static void ShouldEqual(this object compareFrom, object compareTo)
    {
        Assert.Equal(compareTo, compareFrom);
    }

    public static void ShouldEqual<T>(this T compareFrom, T compareTo)
    {
        Assert.Equal(compareTo, compareFrom);
    }

    public static void ShouldBeSameAs<T>(this T actual, T expected)
    {
        Assert.Same(expected, actual);
    }

    public static void ShouldNotBeSameAs<T>(this T actual, T expected)
    {
        Assert.NotSame(expected, actual);
    }

    public static void ShouldBeAssignableFrom<T>(this object instance) where T : class
    {
        Assert.IsAssignableFrom<T>(instance);
    }

    public static void ShouldBeType(this object instance, Type type)
    {
        Assert.IsType(type, instance);
    }

    public static void ShouldBeType<T>(this object instance)
    {
        Assert.IsType<T>(instance);
    }

    public static void ShouldNotBeType<T>(this object instance)
    {
        Assert.IsNotType<T>(instance);
    }

    public static void ShouldContain(this string current, string expectedSubstring, StringComparison comparison)
    {
        Assert.Contains(expectedSubstring, current, comparison);
    }

    public static void ShouldStartWith(this string current, string expectedSubstring, StringComparison comparison)
    {
        Assert.True(current.StartsWith(expectedSubstring, comparison));
    }

    public static void ShouldNotBeNull(this object currentObject)
    {
        Assert.NotNull(currentObject);
    }

    public static void ShouldNotBeNullNorEmpty(this string value)
    {
        Assert.NotNull(value);
        Assert.NotEmpty(value);
    }

    public static void ShouldNotEqual(this object compareFrom, object compareTo)
    {
        Assert.NotEqual(compareTo, compareFrom);
    }

    public static void ShouldBeGreaterThan<T>(this T current, T other) where T : IComparable
    {
        Assert.True(current.CompareTo(other) > 0, current + " is not greater than " + other);
    }

    public static void ShouldBeLessThan<T>(this T current, T other) where T : IComparable
    {
        Assert.True(current.CompareTo(other) < 0, current + " is not less than " + other);
    }

    static string ToSafeString(this char c)
    {
        if (Char.IsControl(c) || Char.IsWhiteSpace(c)) {
            switch (c) {
            case '\r':
                return @"\r";
            case '\n':
                return @"\n";
            case '\t':
                return @"\t";
            case '\a':
                return @"\a";
            case '\v':
                return @"\v";
            case '\f':
                return @"\f";
            default:
                return String.Format("\\u{0:X};", (int) c);
            }
        }
        return c.ToString(CultureInfo.InvariantCulture);
    }
}

public enum DiffStyle
{
    Full,
    Minimal
}