using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Reflection;
using PolyTrader.Modules.CopyTrading.Persistence.Ef;
using PolyTraderSharp.Models;
using Xunit;

namespace PolyTrader.Tests
{
    /// <summary>
    /// Sichert die Befunde des Linux-Sichttests vom 26.08.2026 ab
    /// (docs/pruefplaene/BEFUND-Linux-Betrieb-2026-08-26.md), damit sie nicht zurückkehren.
    /// </summary>
    public class LinuxFindingsTests
    {
        // ── B-5: Windows-Pfad als Standardwert unter Linux ──────────────────────────────

        [Fact]
        public void Mullvad_default_path_matches_the_platform()
        {
            string expected = System.OperatingSystem.IsWindows()
                ? @"C:\Program Files\Mullvad VPN\resources\mullvad.exe"
                : "/usr/bin/mullvad";

            Assert.Equal(expected, ServerSettings.DefaultMullvadCliPath);
            Assert.Equal(expected, new ServerSettings().MullvadCliPath);
        }

        // ── B-14: mehrzeilige Texte in einzeiligen Feldern ──────────────────────────────

        [Theory]
        [InlineData(nameof(TrackedTrader.Description))]
        [InlineData(nameof(TrackedTrader.Reasoning))]
        public void Long_free_text_properties_are_marked_multiline(string propertyName)
        {
            var p = typeof(TrackedTrader).GetProperty(propertyName)!;
            var attr = p.GetCustomAttribute<DataTypeAttribute>();

            Assert.NotNull(attr);
            Assert.Equal(DataType.MultilineText, attr!.DataType);
        }

        // ── B-15: ein fehlerhafter Datensatz legt die Modul-Hydration lahm ──────────────

        [Fact]
        public void Assigned_accounts_round_trip_through_json()
        {
            var set = new System.Collections.Generic.HashSet<int> { 1, 2 };
            Assert.Equal(set, AccountIdSetJson.Deserialize(AccountIdSetJson.Serialize(set)));
        }

        [Fact]
        public void Empty_column_becomes_an_empty_assignment()
        {
            Assert.Empty(AccountIdSetJson.Deserialize(null));
            Assert.Empty(AccountIdSetJson.Deserialize(""));
            Assert.Empty(AccountIdSetJson.Deserialize("[]"));
        }

        [Fact]
        public void Plain_number_list_is_still_understood()
        {
            AccountIdSetJson.ResetDiagnostics();

            Assert.Equal(new System.Collections.Generic.HashSet<int> { 1, 2 },
                         AccountIdSetJson.Deserialize("1,2"));
            Assert.Equal(0, AccountIdSetJson.MalformedCount);
        }

        [Fact]
        public void Unreadable_value_yields_an_empty_set_and_is_counted()
        {
            AccountIdSetJson.ResetDiagnostics();

            // Der Fall aus dem Test: kaputter Wert statt JSON-Array. Frueher warf die
            // EF-Wertkonvertierung hier und es wurde KEIN einziger Trader geladen.
            Assert.Empty(AccountIdSetJson.Deserialize("{kaputt"));

            Assert.Equal(1, AccountIdSetJson.MalformedCount);
            Assert.Equal("{kaputt", AccountIdSetJson.LastMalformedValue);
        }

        [Fact]
        public void Text_that_is_not_a_number_list_is_not_silently_accepted()
        {
            AccountIdSetJson.ResetDiagnostics();

            Assert.Empty(AccountIdSetJson.Deserialize("1,zwei"));
            Assert.Equal(1, AccountIdSetJson.MalformedCount);
        }
    }
}