using PnvPanel.Application.Admin.Instructions;
using PnvPanel.Application.Tests.TestSupport;
using PnvPanel.Domain.Instructions;
using Xunit;

namespace PnvPanel.Application.Tests.Admin.Instructions;

public class InstructionTabCommandHandlerTests
{
    [Fact]
    public async Task Create_AddsTab()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var handler = new CreateInstructionTabCommandHandler(dbContext);

        var result = await handler.Handle(
            new CreateInstructionTabCommand("Настройка роутера", "текст", 10),
            CancellationToken.None
        );
        await dbContext.SaveChangesAsync(CancellationToken.None);

        Assert.True(result.IsSuccess);
        Assert.Equal("Настройка роутера", result.Value.Title);
        Assert.Single(dbContext.InstructionTabs);
    }

    [Fact]
    public async Task Update_ReplacesFields()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var tab = InstructionTab.Create("Старое", "старый текст", 10);
        dbContext.InstructionTabs.Add(tab);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        var handler = new UpdateInstructionTabCommandHandler(dbContext);

        var result = await handler.Handle(
            new UpdateInstructionTabCommand(tab.Id, "Новое", "новый текст", 20),
            CancellationToken.None
        );

        Assert.True(result.IsSuccess);
        Assert.Equal("Новое", result.Value.Title);
        Assert.Equal("новый текст", result.Value.Body);
        Assert.Equal(20, result.Value.SortOrder);
    }

    [Fact]
    public async Task Update_WhenTabMissing_ReturnsNotFound()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var handler = new UpdateInstructionTabCommandHandler(dbContext);

        var result = await handler.Handle(
            new UpdateInstructionTabCommand(Guid.NewGuid(), "Новое", "текст", 10),
            CancellationToken.None
        );

        Assert.False(result.IsSuccess);
        Assert.Equal(InstructionErrors.TabNotFound, result.Error);
    }

    [Fact]
    public async Task Delete_RemovesTab()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var tab = InstructionTab.Create("Удалить меня", "текст", 10);
        dbContext.InstructionTabs.Add(tab);
        await dbContext.SaveChangesAsync(CancellationToken.None);

        var handler = new DeleteInstructionTabCommandHandler(dbContext);

        var result = await handler.Handle(
            new DeleteInstructionTabCommand(tab.Id),
            CancellationToken.None
        );
        await dbContext.SaveChangesAsync(CancellationToken.None);

        Assert.True(result.IsSuccess);
        Assert.Empty(dbContext.InstructionTabs);
    }

    [Fact]
    public async Task Delete_WhenTabMissing_ReturnsNotFound()
    {
        using var dbContext = InMemoryDbContextFactory.Create();
        var handler = new DeleteInstructionTabCommandHandler(dbContext);

        var result = await handler.Handle(
            new DeleteInstructionTabCommand(Guid.NewGuid()),
            CancellationToken.None
        );

        Assert.False(result.IsSuccess);
        Assert.Equal(InstructionErrors.TabNotFound, result.Error);
    }
}