using Application.Dto.Category;
using Service.AI;

namespace WebApi.Test.Application;

/// <summary>
/// TransactionCategoryApplication 单元测试
/// </summary>
public class TransactionCategoryApplicationTest : BaseApplicationTest
{
    private readonly ITransactionCategoryRepository _categoryRepository;
    private readonly ITransactionRecordRepository _transactionRepository;
    private readonly IBudgetRepository _budgetRepository;
    private readonly ISmartHandleService _smartHandleService;
    private readonly TransactionCategoryApplication _application;

    public TransactionCategoryApplicationTest()
    {
        _categoryRepository = Substitute.For<ITransactionCategoryRepository>();
        _transactionRepository = Substitute.For<ITransactionRecordRepository>();
        _budgetRepository = Substitute.For<IBudgetRepository>();
        _smartHandleService = Substitute.For<ISmartHandleService>();
        _application = new TransactionCategoryApplication(
            _categoryRepository,
            _transactionRepository,
            _budgetRepository,
            _smartHandleService);
    }

    #region GetListAsync Tests

    [Fact]
    public async Task GetListAsync_无类型筛选_应返回所有分类()
    {
        // Arrange
        var categories = new List<TransactionCategory>
        {
            new() { Id = 1, Name = "餐饮", Type = TransactionType.Expense },
            new() { Id = 2, Name = "工资", Type = TransactionType.Income }
        };
        _categoryRepository.GetAllAsync().Returns(categories);

        // Act
        var result = await _application.GetListAsync();

        // Assert
        result.Should().HaveCount(2);
        result.Should().Contain(c => c.Name == "餐饮");
        result.Should().Contain(c => c.Name == "工资");
    }

    [Fact]
    public async Task GetListAsync_指定类型_应返回该类型分类()
    {
        // Arrange
        var expenseCategories = new List<TransactionCategory>
        {
            new() { Id = 1, Name = "餐饮", Type = TransactionType.Expense },
            new() { Id = 2, Name = "交通", Type = TransactionType.Expense }
        };
        _categoryRepository.GetCategoriesByTypeAsync(TransactionType.Expense).Returns(expenseCategories);

        // Act
        var result = await _application.GetListAsync(TransactionType.Expense);

        // Assert
        result.Should().HaveCount(2);
        result.Should().AllSatisfy(c => c.Type.Should().Be(TransactionType.Expense));
    }

    #endregion

    #region GetByIdAsync Tests

    [Fact]
    public async Task GetByIdAsync_存在的分类_应返回分类详情()
    {
        // Arrange
        var category = new TransactionCategory
        {
            Id = 1,
            Name = "餐饮",
            Type = TransactionType.Expense
        };
        _categoryRepository.GetByIdAsync(1).Returns(category);

        // Act
        var result = await _application.GetByIdAsync(1);

        // Assert
        result.Should().NotBeNull();
        result.Id.Should().Be(1);
        result.Name.Should().Be("餐饮");
    }

    [Fact]
    public async Task GetByIdAsync_不存在的分类_应抛出NotFoundException()
    {
        // Arrange
        _categoryRepository.GetByIdAsync(999).Returns((TransactionCategory?)null);

        // Act & Assert
        await Assert.ThrowsAsync<NotFoundException>(() => _application.GetByIdAsync(999));
    }

    #endregion

    #region CreateAsync Tests

    [Fact]
    public async Task CreateAsync_有效请求_应成功创建()
    {
        // Arrange
        var request = new CreateCategoryRequest
        {
            Name = "新分类",
            Type = TransactionType.Expense
        };
        _categoryRepository.GetByNameAndTypeAsync("新分类", TransactionType.Expense).Returns((TransactionCategory?)null);
        _categoryRepository.AddAsync(Arg.Any<TransactionCategory>()).Returns(true);

        // Act
        var result = await _application.CreateAsync(request);

        // Assert
        result.Should().BeGreaterThan(0);
        await _categoryRepository.Received(1).AddAsync(Arg.Is<TransactionCategory>(
            c => c.Name == "新分类" && c.Type == TransactionType.Expense
        ));
    }

    [Fact]
    public async Task CreateAsync_同名分类已存在_应抛出ValidationException()
    {
        // Arrange
        var existingCategory = new TransactionCategory
        {
            Id = 1,
            Name = "餐饮",
            Type = TransactionType.Expense
        };
        var request = new CreateCategoryRequest
        {
            Name = "餐饮",
            Type = TransactionType.Expense
        };
        _categoryRepository.GetByNameAndTypeAsync("餐饮", TransactionType.Expense).Returns(existingCategory);

        // Act & Assert
        var exception = await Assert.ThrowsAsync<ValidationException>(() => _application.CreateAsync(request));
        exception.Message.Should().Contain("已存在相同名称的分类");
    }

    [Fact]
    public async Task CreateAsync_Repository添加失败_应抛出BusinessException()
    {
        // Arrange
        var request = new CreateCategoryRequest
        {
            Name = "测试分类",
            Type = TransactionType.Expense
        };
        _categoryRepository.GetByNameAndTypeAsync("测试分类", TransactionType.Expense).Returns((TransactionCategory?)null);
        _categoryRepository.AddAsync(Arg.Any<TransactionCategory>()).Returns(false);

        // Act & Assert
        await Assert.ThrowsAsync<BusinessException>(() => _application.CreateAsync(request));
    }

    #endregion

    #region UpdateAsync Tests

    [Fact]
    public async Task UpdateAsync_有效请求_应成功更新()
    {
        // Arrange
        var existingCategory = new TransactionCategory
        {
            Id = 1,
            Name = "旧名称",
            Type = TransactionType.Expense
        };
        var request = new UpdateCategoryRequest
        {
            Id = 1,
            Name = "新名称"
        };
        _categoryRepository.GetByIdAsync(1).Returns(existingCategory);
        _categoryRepository.GetByNameAndTypeAsync("新名称", TransactionType.Expense).Returns((TransactionCategory?)null);
        _categoryRepository.UpdateAsync(Arg.Any<TransactionCategory>()).Returns(true);

        // Act
        await _application.UpdateAsync(request);

        // Assert
        await _categoryRepository.Received(1).UpdateAsync(Arg.Is<TransactionCategory>(
            c => c.Id == 1 && c.Name == "新名称"
        ));
        await _transactionRepository.Received(1).UpdateCategoryNameAsync("旧名称", "新名称", TransactionType.Expense);
        await _budgetRepository.Received(1).UpdateBudgetCategoryNameAsync("旧名称", "新名称", TransactionType.Expense);
    }

    [Fact]
    public async Task UpdateAsync_分类不存在_应抛出NotFoundException()
    {
        // Arrange
        var request = new UpdateCategoryRequest
        {
            Id = 999,
            Name = "新名称"
        };
        _categoryRepository.GetByIdAsync(999).Returns((TransactionCategory?)null);

        // Act & Assert
        await Assert.ThrowsAsync<NotFoundException>(() => _application.UpdateAsync(request));
    }

    [Fact]
    public async Task UpdateAsync_新名称已存在_应抛出ValidationException()
    {
        // Arrange
        var existingCategory = new TransactionCategory
        {
            Id = 1,
            Name = "旧名称",
            Type = TransactionType.Expense
        };
        var conflictingCategory = new TransactionCategory
        {
            Id = 2,
            Name = "冲突名称",
            Type = TransactionType.Expense
        };
        var request = new UpdateCategoryRequest
        {
            Id = 1,
            Name = "冲突名称"
        };
        _categoryRepository.GetByIdAsync(1).Returns(existingCategory);
        _categoryRepository.GetByNameAndTypeAsync("冲突名称", TransactionType.Expense).Returns(conflictingCategory);

        // Act & Assert
        await Assert.ThrowsAsync<ValidationException>(() => _application.UpdateAsync(request));
    }

    [Fact]
    public async Task UpdateAsync_名称未改变_不应同步更新关联数据()
    {
        // Arrange
        var existingCategory = new TransactionCategory
        {
            Id = 1,
            Name = "相同名称",
            Type = TransactionType.Expense
        };
        var request = new UpdateCategoryRequest
        {
            Id = 1,
            Name = "相同名称"
        };
        _categoryRepository.GetByIdAsync(1).Returns(existingCategory);
        _categoryRepository.UpdateAsync(Arg.Any<TransactionCategory>()).Returns(true);

        // Act
        await _application.UpdateAsync(request);

        // Assert
        await _transactionRepository.DidNotReceive().UpdateCategoryNameAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<TransactionType>());
        await _budgetRepository.DidNotReceive().UpdateBudgetCategoryNameAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<TransactionType>());
    }

    #endregion

    #region DeleteAsync Tests

    [Fact]
    public async Task DeleteAsync_未被使用的分类_应成功删除()
    {
        // Arrange
        _categoryRepository.IsCategoryInUseAsync(1).Returns(false);
        _categoryRepository.DeleteAsync(1).Returns(true);

        // Act
        await _application.DeleteAsync(1);

        // Assert
        await _categoryRepository.Received(1).DeleteAsync(1);
    }

    [Fact]
    public async Task DeleteAsync_已被使用的分类_应抛出ValidationException()
    {
        // Arrange
        _categoryRepository.IsCategoryInUseAsync(1).Returns(true);

        // Act & Assert
        var exception = await Assert.ThrowsAsync<ValidationException>(() => _application.DeleteAsync(1));
        exception.Message.Should().Contain("已被使用");
    }

    [Fact]
    public async Task DeleteAsync_删除失败_应抛出BusinessException()
    {
        // Arrange
        _categoryRepository.IsCategoryInUseAsync(1).Returns(false);
        _categoryRepository.DeleteAsync(1).Returns(false);

        // Act & Assert
        await Assert.ThrowsAsync<BusinessException>(() => _application.DeleteAsync(1));
    }

    #endregion

    #region BatchCreateAsync Tests

    [Fact]
    public async Task BatchCreateAsync_有效请求列表_应返回创建数量()
    {
        // Arrange
        var requests = new List<CreateCategoryRequest>
        {
            new() { Name = "分类1", Type = TransactionType.Expense },
            new() { Name = "分类2", Type = TransactionType.Expense }
        };
        _categoryRepository.AddRangeAsync(Arg.Any<List<TransactionCategory>>()).Returns(true);

        // Act
        var result = await _application.BatchCreateAsync(requests);

        // Assert
        result.Should().Be(2);
        await _categoryRepository.Received(1).AddRangeAsync(Arg.Is<List<TransactionCategory>>(
            list => list.Count == 2
        ));
    }

    [Fact]
    public async Task BatchCreateAsync_Repository添加失败_应抛出BusinessException()
    {
        // Arrange
        var requests = new List<CreateCategoryRequest>
        {
            new() { Name = "分类1", Type = TransactionType.Expense }
        };
        _categoryRepository.AddRangeAsync(Arg.Any<List<TransactionCategory>>()).Returns(false);

        // Act & Assert
        await Assert.ThrowsAsync<BusinessException>(() => _application.BatchCreateAsync(requests));
    }

    #endregion

    #region UpdateSelectedIconAsync Tests

    [Fact]
    public async Task UpdateSelectedIconAsync_有效索引_应更新选中图标()
    {
        // Arrange
        var category = new TransactionCategory
        {
            Id = 1,
            Name = "测试",
            Type = TransactionType.Expense,
            Icon = """["<svg>icon1</svg>","<svg>icon2</svg>","<svg>icon3</svg>"]"""
        };
        var request = new UpdateSelectedIconRequest
        {
            CategoryId = 1,
            SelectedIndex = 2
        };
        _categoryRepository.GetByIdAsync(1).Returns(category);
        _categoryRepository.UpdateAsync(Arg.Any<TransactionCategory>()).Returns(true);

        // Act
        await _application.UpdateSelectedIconAsync(request);

        // Assert
        await _categoryRepository.Received(1).UpdateAsync(Arg.Is<TransactionCategory>(
            c => c.Id == 1 && c.Icon != null && c.Icon.Contains("icon3")
        ));
    }

    [Fact]
    public async Task UpdateSelectedIconAsync_分类不存在_应抛出NotFoundException()
    {
        // Arrange
        var request = new UpdateSelectedIconRequest
        {
            CategoryId = 999,
            SelectedIndex = 0
        };
        _categoryRepository.GetByIdAsync(999).Returns((TransactionCategory?)null);

        // Act & Assert
        await Assert.ThrowsAsync<NotFoundException>(() => _application.UpdateSelectedIconAsync(request));
    }

    [Fact]
    public async Task UpdateSelectedIconAsync_分类无图标_应抛出ValidationException()
    {
        // Arrange
        var category = new TransactionCategory
        {
            Id = 1,
            Name = "测试",
            Type = TransactionType.Expense,
            Icon = null
        };
        var request = new UpdateSelectedIconRequest
        {
            CategoryId = 1,
            SelectedIndex = 0
        };
        _categoryRepository.GetByIdAsync(1).Returns(category);

        // Act & Assert
        await Assert.ThrowsAsync<ValidationException>(() => _application.UpdateSelectedIconAsync(request));
    }

    [Fact]
    public async Task UpdateSelectedIconAsync_索引超出范围_应抛出ValidationException()
    {
        // Arrange
        var category = new TransactionCategory
        {
            Id = 1,
            Name = "测试",
            Type = TransactionType.Expense,
            Icon = """["<svg>icon1</svg>"]"""
        };
        var request = new UpdateSelectedIconRequest
        {
            CategoryId = 1,
            SelectedIndex = 5
        };
        _categoryRepository.GetByIdAsync(1).Returns(category);

        // Act & Assert
        await Assert.ThrowsAsync<ValidationException>(() => _application.UpdateSelectedIconAsync(request));
    }

    #endregion
}