using System;
using Util.Domain.Tests.Samples;
using Util.Domain.Tests.XUnitHelpers;
using Util.Exceptions;
using Util.Validation;
using Xunit;

namespace Util.Domain.Tests.Entities; 

/// <summary>
/// Guid标识实体测试
/// </summary>
public class GuidEntityTest {
    /// <summary>
    /// 聚合根测试样例
    /// </summary>
    private AggregateRootSample _sample;
    /// <summary>
    /// 聚合根测试样例2
    /// </summary>
    private AggregateRootSample _sample2;

    /// <summary>
    /// 测试初始化
    /// </summary>
    public GuidEntityTest() {
        _sample = new AggregateRootSample();
        _sample2 = new AggregateRootSample();
    }

    /// <summary>
    /// 测试实体相等性 - 判空
    /// </summary>
    [Fact]
    public void TestEquals_Null() {
        Assert.False( _sample.Equals( _sample2 ) );
        Assert.False( _sample.Equals( null ) );

        Assert.False( _sample == _sample2 );
        Assert.False( _sample == null );
        Assert.False( null == _sample2 );

        Assert.True( _sample != _sample2 );
        Assert.True( _sample != null );
        Assert.True( null != _sample2 );

        _sample2 = null;
        Assert.True( _sample2 == null );
        Assert.False( _sample.Equals( _sample2 ) );

        _sample = null;
        Assert.True( _sample == _sample2 );
        Assert.True( _sample2 == _sample );
    }

    /// <summary>
    /// 测试实体相等性 - 类型无效
    /// </summary>
    [Fact]
    public void TestEquals_InvalidType() {
        Guid id = Guid.NewGuid();
        _sample = new AggregateRootSample( id );
        AggregateRootSample2 sample2 = new AggregateRootSample2( id );
        Assert.False( _sample.Equals( sample2 ) );
        Assert.True( _sample != sample2 );
        Assert.True( sample2 != _sample );
    }

    /// <summary>
    /// 测试实体相等性 - 当两个实体的标识相同，则实体相同
    /// </summary>
    [Fact]
    public void TestEquals_IdEquals() {
        Guid id = Guid.NewGuid();
        _sample = new AggregateRootSample( id );
        _sample2 = new AggregateRootSample( id );
        Assert.True( _sample.Equals( _sample2 ) );
        Assert.True( _sample == _sample2 );
        Assert.False( _sample != _sample2 );
    }

    /// <summary>
    /// 测试验证 - Id为空，无法通过
    /// </summary>
    [Fact]
    public void TestValidate_IdIsEmpty() {
        AssertHelper.Throws<Warning>( () => {
            _sample = AggregateRootSample.CreateSample( Guid.Empty );
            _sample.Validate();
        }, "标识" );
    }

    /// <summary>
    /// 验证必填项，通过字符串设置错误消息
    /// </summary>
    [Fact]
    public void TestValidate_Required() {
        AssertHelper.Throws<Warning>( () => {
            _sample.Name = null;
            _sample.Validate();
        }, "姓名不能为空" );
    }

    /// <summary>
    /// 测试添加验证规则
    /// </summary>
    [Fact]
    public void TestAddValidationRule() {
        _sample = AggregateRootSample.CreateSample();
        AssertHelper.Throws<Warning>( () => {
            _sample.Name = "abcd";
            _sample.AddValidationRule( new ValidationRuleSample( _sample ) );
            _sample.Validate();
        }, "名称长度不能大于3" );
    }

    /// <summary>
    /// 测试设置验证处理器 - 不进行任何操作，所以不会抛出异常
    /// </summary>
    [Fact]
    public void TestSetValidationHandler() {
        _sample = AggregateRootSample.CreateSample();
        _sample.Name = "abcd";
        _sample.AddValidationRule( new ValidationRuleSample( _sample ) );
        _sample.SetValidationHandler( new NothingHandler() );
        _sample.Validate();
    }
}