using Arch.Core;
using HSchool.Ai;
using HSchool.Content;
using HSchool.People;

namespace HSchool.Simulation.Tests;

public class WarmthTests
{
    private static readonly DateTime JanuaryMorning = new(2012, 1, 15, 6, 0, 0, DateTimeKind.Utc);

    [Fact]
    public void NakedOnFrost_LosesWarmth_AndHomeRestoresItOvernight()
    {
        using var school = Open(JanuaryMorning);
        PutFirstPerson(school, "yard", PersonInsulation.Naked, warmth: 1f);
        school.SyncWeather(force: true);
        Assert.True(school.Weather.TemperatureC < 0f);

        WarmthDecay.Apply(school, gameMinutes: 60);
        var afterHour = WarmthOf(school);
        Assert.True(afterHour < 1f, $"warmth stayed {afterHour} on the frost");

        PutFirstPerson(school, nodeId: null, PersonInsulation.Naked, afterHour);
        NeedDecay.Apply(school.World, school.Catalog!, gameMinutes: 60);
        Assert.Equal(school.Catalog!.Needs["Warmth"].Max, WarmthOf(school));
    }

    [Fact]
    public void JacketOnFrost_LosesLessWarmthThanNaked()
    {
        using var school = Open(JanuaryMorning);
        var catalog = school.Catalog!;
        school.SyncWeather(force: true);

        PutFirstPerson(school, "yard", PersonInsulation.Naked, warmth: 1f);
        WarmthDecay.Apply(school, gameMinutes: 60);
        var naked = WarmthOf(school);

        PutFirstPerson(school, "yard", PersonInsulation.FromWorn(catalog, "Jacket"), warmth: 1f);
        WarmthDecay.Apply(school, gameMinutes: 60);
        var coated = WarmthOf(school);

        Assert.True(naked < 1f);
        Assert.True(coated > naked, $"jacket {coated} should beat naked {naked}");
    }

    [Fact]
    public void FromPerson_SumsWornInsulation_AndIgnoresHome()
    {
        using var school = Open(JanuaryMorning);
        var catalog = school.Catalog!;
        var person = school.Roster!.People.First(row =>
            row.Items.Any(item => item.Location.Equals(ItemLocations.Worn, StringComparison.Ordinal)));
        Assert.True(PersonInsulation.FromPerson(person, catalog).Value > 0);

        var atHome = person with
        {
            Items = [.. person.Items.Select(item => item with { Location = ItemLocations.Home })],
        };
        Assert.Equal(0, PersonInsulation.FromPerson(atHome, catalog).Value);
    }

    private static void PutFirstPerson(School school, string? nodeId, PersonInsulation insulation, float warmth)
    {
        var query = new QueryDescription().WithAll<PersonNeeds, PersonInsulation, Presence>();
        var first = true;
        school.World.Query(
            in query,
            (ref PersonNeeds needs, ref PersonInsulation worn, ref Presence presence) =>
            {
                if (!first)
                {
                    return;
                }

                first = false;
                worn = insulation;
                needs.Values["Warmth"] = warmth;
                presence = nodeId is null
                    ? Presence.OffCampus
                    : new Presence(nodeId, 0f, nodeId, false, []);
            });
    }

    private static float WarmthOf(School school)
    {
        var value = float.NaN;
        var query = new QueryDescription().WithAll<PersonNeeds>();
        school.World.Query(in query, (ref PersonNeeds needs) =>
        {
            if (float.IsNaN(value) && needs.Values.TryGetValue("Warmth", out var warmth))
            {
                value = warmth;
            }
        });
        return value;
    }

    private static School Open(DateTime start)
    {
        var (catalog, map) = Vanilla();
        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", start);
        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Russia", start);
        var school = School.Create(1, "Тепло", start, catalog, map);
        school.InstallPeople(roster, seed: 1, "Russia", pool, climatePresetId: "TemperateContinental");
        school.ConfigurePresence();
        return school;
    }

    private static (DefCatalog Catalog, MapLayout Map) Vanilla()
    {
        var root = Path.Combine(AppContext.BaseDirectory, "vanilla");
        var documents = new List<ContentDocument>();
        foreach (var path in Directory.EnumerateFiles(root, "*.*", SearchOption.AllDirectories))
        {
            if (!path.EndsWith(".jsonc", StringComparison.OrdinalIgnoreCase)
                && !path.EndsWith(".json", StringComparison.OrdinalIgnoreCase))
            {
                continue;
            }

            var relative = Path.GetRelativePath(root, path).Replace('\\', '/');
            documents.Add(new ContentDocument(CatalogLoader.CorePackId, relative, File.ReadAllText(path)));
        }

        var catalog = new CatalogLoader().Load([CatalogLoader.CorePackId], documents);
        var map = CatalogLoader.LastDefaultMap([CatalogLoader.CorePackId], documents);
        Assert.NotNull(map);
        return (catalog, map);
    }
}