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

namespace HSchool.Simulation.Tests;

public class OffenseMemorySimulationTests
{
    private static readonly DateTime TuesdayMorning = new(2012, 4, 3, 6, 0, 0, DateTimeKind.Utc);

    [Fact]
    public void FightBrokenByStaff_AddsFightAndReprimandToBothPupils()
    {
        var (school, first, second, staffId) = TwoPupilsAndStaffOnBreak();
        using (school)
        {
            OpinionStore.Set(first, second.Id, -55);
            OpinionStore.Set(second, first.Id, -55);
            PlaceAt(school, first.Id, "yard");
            PlaceAt(school, second.Id, "yard");
            PlaceAt(school, staffId, "yard");

            Assert.True(school.TryStartAction(first.Id, TalkActions.Fight));
            PlaceAt(school, staffId, "yard");
            TalkCircleSystem.Apply(school, 1d);

            first = school.Roster!.People.First(person => person.Id == first.Id);
            second = school.Roster.People.First(person => person.Id == second.Id);
            AssertFightAndReprimand(first, second.Id);
            AssertFightAndReprimand(second, first.Id);
        }
    }

    [Fact]
    public void OverCeiling_InWorld_DropsOldestAfterRepeatedFights()
    {
        var (school, first, second) = TwoPupilsOnBreak();
        using (school)
        {
            var rules = school.Catalog!.BehaviorRules!;
            var max = rules.OffenseMemoryMax;
            Assert.True(max > 0);

            for (var i = 0; i < max + 1; i++)
            {
                OpinionStore.Set(first, second.Id, -55);
                OpinionStore.Set(second, first.Id, -55);
                PlaceAt(school, first.Id, "yard");
                PlaceAt(school, second.Id, "yard");
                Assert.True(school.TryStartAction(first.Id, TalkActions.Fight));
                TickWhile(school, personId => TalkActions.IsFight(ActivityOf(school, personId)), first.Id, second.Id);
                first = school.Roster!.People.First(person => person.Id == first.Id);
                second = school.Roster.People.First(person => person.Id == second.Id);
            }

            Assert.NotNull(first.Offenses);
            Assert.Equal(max, first.Offenses!.Count);
            Assert.All(first.Offenses, row => Assert.Equal(OffenseKinds.Fight, row.Kind));
        }
    }

    private static void AssertFightAndReprimand(Person person, string otherId)
    {
        Assert.NotNull(person.Offenses);
        Assert.Contains(
            person.Offenses!,
            row => row.Kind == OffenseKinds.Fight && row.OtherPersonId == otherId);
        Assert.Contains(
            person.Offenses!,
            row => row.Kind == OffenseKinds.Reprimand && row.OtherPersonId == otherId);
    }

    private static (School School, Person First, Person Second) TwoPupilsOnBreak()
    {
        var (catalog, map) = Vanilla();
        var school = OpenSchool(catalog, map, seed: 42, TuesdayMorning, advanceToBreak: true);
        var schoolClass = school.Roster!.Classes.First(row => row.RoomId == "classroom-101");
        var pupils = schoolClass.PupilIds
            .Select(id => school.Roster.People.First(person => person.Id == id))
            .Take(2)
            .ToArray();
        return (school, pupils[0], pupils[1]);
    }

    private static (School School, Person First, Person Second, string StaffId) TwoPupilsAndStaffOnBreak()
    {
        var (school, first, second) = TwoPupilsOnBreak();
        const float cap = 100_000f;
        var roster = school.Roster!;
        var pool = school.Applicants!;
        var hired = Staffing.Hire(
            school.Catalog!,
            school.Map!,
            roster,
            pool,
            pool.Applicants[0].Person.Id,
            Staffing.TeacherPosition,
            cap);
        Assert.Equal(StaffingError.None, hired.Error);
        school.ApplyStaffing(hired.Roster, hired.Pool);
        first = school.Roster!.People.First(person => person.Id == first.Id);
        second = school.Roster.People.First(person => person.Id == second.Id);
        var staffId = school.Roster.People.First(person => person.IsStaff).Id;
        return (school, first, second, staffId);
    }

    private static School OpenSchool(DefCatalog catalog, MapLayout map, int seed, DateTime start, bool advanceToBreak)
    {
        var roster = RosterGenerator.Generate(catalog, map, seed, "Russia", start);
        var pool = ApplicantPool.Create(catalog, roster, seed, "Russia", start);
        var schoolClass = roster.Classes.First(row => row.RoomId == "classroom-101");
        var school = School.Create(seed, "OffenseMemory", start, catalog, map);
        school.InstallPeople(roster, seed, "Russia", pool);
        school.SetTimetable(new HSchool.Schedule.Timetable(
            [
                new HSchool.Schedule.LessonPlacement(schoolClass.Id, "Mathematics", "t1", schoolClass.RoomId, Day: 1, Period: 1),
            ],
            []));
        school.ConfigurePresence(weekDays: 5, maxDecisionsPerTick: 10_000);
        if (advanceToBreak)
        {
            AdvanceTo(school, new DateTime(2012, 4, 3, 9, 18, 0, DateTimeKind.Utc));
        }

        return school;
    }

    private static void AdvanceTo(School school, DateTime until)
    {
        while (school.Clock.Time < until)
        {
            school.Tick(0.2d, 5d);
        }
    }

    private static void PlaceAt(School school, string personId, string? nodeId)
    {
        TalkCircleSystem.Interrupt(school, personId);
        var query = new QueryDescription().WithAll<PersonIdentity, Presence, PersonActivity, Intent>();
        school.World.Query(in query, (ref PersonIdentity identity, ref Presence presence, ref PersonActivity activity, ref Intent intent) =>
        {
            if (identity.Id.Equals(personId, StringComparison.Ordinal))
            {
                presence = nodeId is null ? Presence.OffCampus : new Presence(nodeId, 0f, nodeId, false, []);
                activity = PersonActivity.Idle;
                intent = Intent.None;
            }
        });
    }

    private static void TickWhile(School school, Func<string, bool> stillGoing, params string[] personIds)
    {
        for (var i = 0; i < 12 && personIds.Any(stillGoing); i++)
        {
            school.Tick(0.2d, 5d);
        }
    }

    private static string? ActivityOf(School school, string personId)
    {
        string? found = null;
        var query = new QueryDescription().WithAll<PersonIdentity, PersonActivity>();
        school.World.Query(in query, (ref PersonIdentity identity, ref PersonActivity activity) =>
        {
            if (identity.Id.Equals(personId, StringComparison.Ordinal) && activity.IsActive)
            {
                found = activity.ActionId;
            }
        });
        return found;
    }

    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;
            }

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

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