using System.Text.Json;
using Decky.Core.Api.Models;
using Decky.Core.Api.Requests;

namespace Decky.Core.Tests;

public sealed class CardUpdateRequestTests
{
    [Fact]
    public void FromCard_preserves_fields_and_serializes_explicit_null_done()
    {
        var card = new CardDto
        {
            Id = 7,
            StackId = 3,
            Title = "Original",
            Description = "Details",
            Type = "plain",
            Owner = "elijah",
            Order = 42,
            Archived = false,
            Done = DateTimeOffset.Parse("2026-07-19T12:00:00Z"),
            DueDate = DateTimeOffset.Parse("2026-07-20T12:00:00Z"),
            StartDate = DateTimeOffset.Parse("2026-07-18T12:00:00Z"),
            Color = "d99080",
        };

        var request = CardUpdateRequest.FromCard(card, title: "Changed", done: null, replaceDone: true);
        var json = JsonSerializer.Serialize(request, new JsonSerializerOptions(JsonSerializerDefaults.Web));
        using var document = JsonDocument.Parse(json);
        var root = document.RootElement;

        Assert.Equal("Changed", root.GetProperty("title").GetString());
        Assert.Equal("elijah", root.GetProperty("owner").GetString());
        Assert.Equal("D99080", root.GetProperty("color").GetString());
        Assert.Equal("2026-07-20T12:00:00+00:00", root.GetProperty("duedate").GetString());
        Assert.Equal(JsonValueKind.Null, root.GetProperty("done").ValueKind);
    }

    [Fact]
    public void FromCard_can_explicitly_clear_description_and_due_date()
    {
        var card = new CardDto
        {
            Title = "Card",
            Description = "Remove me",
            Type = "plain",
            Owner = "admin",
            DueDate = DateTimeOffset.Parse("2026-07-20T12:00:00Z"),
            Color = "D99080",
        };

        var request = CardUpdateRequest.FromCard(
            card,
            description: string.Empty,
            replaceDescription: true,
            dueDate: null,
            replaceDueDate: true);

        Assert.Equal(string.Empty, request.Description);
        Assert.Null(request.DueDate);
    }
}