using EndavaTask.Contracts;
using EndavaTask.Dtos;
using EndavaTask.Mappings;
using EndavaTask.Models;
using Xunit;

namespace EndavaTask.Tests;

public class EntityDtoMappingsTests
{
    [Fact]
    public void Product_ToDto_And_ToEntity_Roundtrip_Works()
    {
        var entity = new Product
        {
            Id = Guid.NewGuid(),
            Name = "Keyboard",
            Price = 90m,
            CategoryId = Guid.NewGuid()
        };

        var dto = entity.ToDto();
        var mappedBack = dto.ToEntity();

        Assert.Equal(entity.Id, dto.Id);
        Assert.Equal(entity.Name, dto.Name);
        Assert.Equal(entity.Price, dto.Price);
        Assert.Equal(entity.CategoryId, dto.CategoryId);

        Assert.Equal(entity.Id, mappedBack.Id);
        Assert.Equal(entity.Name, mappedBack.Name);
        Assert.Equal(entity.Price, mappedBack.Price);
        Assert.Equal(entity.CategoryId, mappedBack.CategoryId);
    }

    [Fact]
    public void Category_ToDto_And_ToEntity_Roundtrip_Works()
    {
        var entity = new Category
        {
            Id = Guid.NewGuid(),
            Name = "Home",
            Description = "Home essentials"
        };

        var dto = entity.ToDto();
        var mappedBack = dto.ToEntity();

        Assert.Equal(entity.Id, dto.Id);
        Assert.Equal(entity.Name, dto.Name);
        Assert.Equal(entity.Description, dto.Description);

        Assert.Equal(entity.Id, mappedBack.Id);
        Assert.Equal(entity.Name, mappedBack.Name);
        Assert.Equal(entity.Description, mappedBack.Description);
    }

    [Fact]
    public void PagedProducts_ToDto_MapsMetadataAndItems()
    {
        var paged = new PagedResult<Product>
        {
            Items =
            [
                new Product { Id = Guid.NewGuid(), Name = "Laptop", Price = 1200m, CategoryId = Guid.NewGuid() },
                new Product { Id = Guid.NewGuid(), Name = "Monitor", Price = 300m, CategoryId = Guid.NewGuid() }
            ],
            PageNumber = 2,
            PageSize = 2,
            TotalCount = 5,
            TotalPages = 3
        };

        var dtoPaged = paged.ToDto();

        Assert.Equal(2, dtoPaged.Items.Count);
        Assert.Equal(2, dtoPaged.PageNumber);
        Assert.Equal(2, dtoPaged.PageSize);
        Assert.Equal(5, dtoPaged.TotalCount);
        Assert.Equal(3, dtoPaged.TotalPages);

        var first = Assert.IsType<ProductDto>(dtoPaged.Items.First());
        Assert.Equal("Laptop", first.Name);
    }
}