using System;
using System.Collections.Generic;
using Xunit;

namespace Util.Tests.Extensions; 

/// <summary>
/// 类型转换扩展测试
/// </summary>
public class ConvertExtensionsTest {
    /// <summary>
    /// 安全转换为字符串
    /// </summary>
    /// <param name="input">输入值</param>
    /// <param name="result">结果</param>
    [Theory]
    [InlineData( null, "" )]
    [InlineData( "  ", "" )]
    [InlineData( 1,"1" )]
    [InlineData( " 1 ", "1" )]
    public void TestSafeString( object input, string result ) {
        Assert.Equal( result, input.SafeString() );
    }

    /// <summary>
    /// 转换为整数
    /// </summary>
    [Theory]
    [InlineData( "", 0 )]
    [InlineData( "1", 1 )]
    public void TestToInt( string input, int result ) {
        Assert.Equal( result, input.ToInt() );
    }

    /// <summary>
    /// 转换为可空整数
    /// </summary>
    [Theory]
    [InlineData( "", null )]
    [InlineData( "1", 1 )]
    public void TestToIntOrNull( string input, int? result ) {
        Assert.Equal( result, input.ToIntOrNull() );
    }

    /// <summary>
    /// 转换为双精度浮点数
    /// </summary>
    [Theory]
    [InlineData( "", 0 )]
    [InlineData( "1.2", 1.2 )]
    public void TestToDouble( string input, double result ) {
        Assert.Equal( result, input.ToDouble() );
    }

    /// <summary>
    /// 转换为可空双精度浮点数
    /// </summary>
    [Theory]
    [InlineData( "", null )]
    [InlineData( "1.2", 1.2 )]
    public void TestToDoubleOrNull( string input, double? result ) {
        Assert.Equal( result, input.ToDoubleOrNull() );
    }

    /// <summary>
    /// 转换为高精度浮点数
    /// </summary>
    [Fact]
    public void TestToDecimal() {
        Assert.Equal( 0, "".ToDecimal() );
        Assert.Equal( 1.2M, "1.2".ToDecimal() );
    }

    /// <summary>
    /// 转换为可空高精度浮点数
    /// </summary>
    [Fact]
    public void TestToDecimalOrNull() {
        Assert.Null( "".ToDecimalOrNull() );
        Assert.Equal( 1.2M, "1.2".ToDecimalOrNull() );
    }

    /// <summary>
    /// 转换为日期
    /// </summary>
    [Fact]
    public void TestToDateTime() {
        Assert.Equal( DateTime.MinValue, "".ToDateTime() );
        Assert.Equal( new DateTime( 2000, 1, 1 ), "2000-1-1".ToDateTime() );
    }

    /// <summary>
    /// 转换为可空日期
    /// </summary>
    [Fact]
    public void TestToDateTimeOrNull() {
        Assert.Null( "".ToDateTimeOrNull() );
        Assert.Equal( new DateTime( 2000, 1, 1 ), "2000-1-1".ToDateTimeOrNull() );
    }

    /// <summary>
    /// 转换为Guid
    /// </summary>
    [Fact]
    public void TestToGuid() {
        Assert.Equal( Guid.Empty, "".ToGuid() );
        Assert.Equal( new Guid( "B9EB56E9-B720-40B4-9425-00483D311DDC" ), "B9EB56E9-B720-40B4-9425-00483D311DDC".ToGuid() );
    }

    /// <summary>
    /// 转换为可空Guid
    /// </summary>
    [Fact]
    public void TestToGuidOrNull() {
        Assert.Null( "".ToGuidOrNull() );
        Assert.Equal( new Guid( "B9EB56E9-B720-40B4-9425-00483D311DDC" ), "B9EB56E9-B720-40B4-9425-00483D311DDC".ToGuidOrNull() );
    }

    /// <summary>
    /// 转换为Guid集合,值为字符串
    /// </summary>
    [Fact]
    public void TestToGuidList_String() {
        const string guid = "83B0233C-A24F-49FD-8083-1337209EBC9A,,EAB523C6-2FE7-47BE-89D5-C6D440C3033A,";
        Assert.Equal( 2, guid.ToGuidList().Count );
        Assert.Equal( new Guid( "83B0233C-A24F-49FD-8083-1337209EBC9A" ), guid.ToGuidList()[0] );
        Assert.Equal( new Guid( "EAB523C6-2FE7-47BE-89D5-C6D440C3033A" ), guid.ToGuidList()[1] );
    }

    /// <summary>
    /// 转换为Guid集合,值为字符串集合
    /// </summary>
    [Fact]
    public void TestToGuidList_StringList() {
        var list = new List<string> { "83B0233C-A24F-49FD-8083-1337209EBC9A", "EAB523C6-2FE7-47BE-89D5-C6D440C3033A" };
        Assert.Equal( 2, list.ToGuidList().Count );
        Assert.Equal( new Guid( "83B0233C-A24F-49FD-8083-1337209EBC9A" ), list.ToGuidList()[0] );
        Assert.Equal( new Guid( "EAB523C6-2FE7-47BE-89D5-C6D440C3033A" ), list.ToGuidList()[1] );
    }
}