using HSchool.Content;

namespace HSchool.People.Tests;

public class OffenseMemoryTests
{
    [Fact]
    public void OverCeiling_DropsTheOldest()
    {
        var person = Blank("a");
        var rules = Rules(max: 2);
        var t0 = new DateTime(2012, 4, 3, 10, 0, 0, DateTimeKind.Utc);
        Assert.True(OffenseMemory.Record(person, OffenseKinds.Quarrel, t0, "b", rules));
        Assert.True(OffenseMemory.Record(person, OffenseKinds.Fight, t0.AddMinutes(1), "b", rules));
        Assert.True(OffenseMemory.Record(person, OffenseKinds.Reprimand, t0.AddMinutes(2), "b", rules));

        Assert.Equal(2, person.Offenses!.Count);
        Assert.Equal(OffenseKinds.Fight, person.Offenses[0].Kind);
        Assert.Equal(OffenseKinds.Reprimand, person.Offenses[1].Kind);
    }

    [Fact]
    public void DisabledKind_DoesNotWrite()
    {
        var person = Blank("a");
        var rules = new BehaviorDef
        {
            DefName = "Behavior",
            OffenseMemoryMax = 5,
            OffenseMemoryKinds = [OffenseKinds.Fight],
        };
        Assert.False(OffenseMemory.Record(
            person,
            OffenseKinds.Quarrel,
            new DateTime(2012, 4, 3, 10, 0, 0, DateTimeKind.Utc),
            "b",
            rules));
        Assert.Null(person.Offenses);
    }

    [Fact]
    public void RosterJson_RoundTripsOffenses_AndOmitsEmpty()
    {
        var roster = Fixtures.Generate(Fixtures.Classrooms(4));
        var pupil = roster.People.First(person => person.IsStudent && !person.IsParent);
        var other = roster.People.First(person =>
            person.IsStudent && !person.Id.Equals(pupil.Id, StringComparison.Ordinal));
        var time = new DateTime(2012, 4, 3, 11, 20, 0, DateTimeKind.Utc);
        OffenseMemory.Record(pupil, OffenseKinds.Fight, time, other.Id, Rules(max: 5));

        var json = RosterJson.Serialize(RosterDocument.From(1, roster));
        Assert.Contains("\"offenses\"", json, StringComparison.Ordinal);
        Assert.Contains("\"kind\": \"fight\"", json, StringComparison.Ordinal);

        var without = roster.People.First(person => person.Offenses is null || person.Offenses.Count == 0);
        var withoutSlice = PersonJsonSlice(json, without.Id);
        Assert.DoesNotContain("\"offenses\"", withoutSlice, StringComparison.Ordinal);

        var loaded = RosterJson.Parse(json).ToRoster();
        var loadedPupil = loaded.People.First(person => person.Id.Equals(pupil.Id, StringComparison.Ordinal));
        Assert.NotNull(loadedPupil.Offenses);
        Assert.Single(loadedPupil.Offenses!);
        Assert.Equal(OffenseKinds.Fight, loadedPupil.Offenses[0].Kind);
        Assert.Equal(other.Id, loadedPupil.Offenses[0].OtherPersonId);
        Assert.Equal(time, loadedPupil.Offenses[0].Time);
    }

    private static string PersonJsonSlice(string json, string personId)
    {
        var marker = $"\"id\": \"{personId}\"";
        var start = json.IndexOf(marker, StringComparison.Ordinal);
        Assert.True(start >= 0);
        var end = json.IndexOf("},", start, StringComparison.Ordinal);
        if (end < 0)
        {
            end = json.Length;
        }

        return json[start..end];
    }

    private static BehaviorDef Rules(int max) => new()
    {
        DefName = "Behavior",
        OffenseMemoryMax = max,
        OffenseMemoryKinds = BehaviorDef.DefaultOffenseMemoryKinds,
    };

    private static Person Blank(string id)
    {
        var cases = new CaseTable
        {
            Nom = id,
            Gen = id,
            Dat = id,
            Acc = id,
            Ins = id,
            Pre = id,
        };
        return new Person
        {
            Id = id,
            FamilyId = "f",
            Female = false,
            BirthDate = new DateTime(2000, 1, 1, 0, 0, 0, DateTimeKind.Utc),
            Name = new PersonName(id, id, id, cases, cases, cases),
            IsStudent = true,
            IsStaff = false,
            IsParent = false,
            Numbers = new Dictionary<string, int>(StringComparer.Ordinal),
            Choices = new Dictionary<string, string>(StringComparer.Ordinal),
            Skills = new Dictionary<string, int>(StringComparer.Ordinal),
            Traits = [],
            Needs = new Dictionary<string, float>(StringComparer.Ordinal),
            Opinions = new Dictionary<string, int>(StringComparer.Ordinal),
        };
    }
}