using HSchool.Content;
using HSchool.People;
using HSchool.Schedule;

namespace HSchool.Simulation.Tests;

public class MorningOpinionsTests
{
    private static readonly DateTime TuesdayMorning = new(2012, 4, 3, 6, 0, 0, DateTimeKind.Utc);
    private static readonly DateTime TuesdayEvening = new(2012, 4, 3, 22, 0, 0, DateTimeKind.Utc);
    private static readonly DateTime WednesdayMorning = new(2012, 4, 4, 6, 0, 0, DateTimeKind.Utc);

    [Fact]
    public void SeveralWorkMornings_DriftClassmateTowardZero_FamilyTowardStart()
    {
        using var school = OpenStaffed();
        var child = school.Roster!.People.First(person => person.IsStudent && !person.IsParent);
        var classmate = school.Roster.People.First(person =>
            person.IsStudent
            && !person.Id.Equals(child.Id, StringComparison.Ordinal)
            && !OpinionStore.FamilyMemberIds(school.Roster, child).Contains(person.Id));
        var family = school.Roster.Families.Single(row => row.Id.Equals(child.FamilyId, StringComparison.Ordinal));
        var parentId = family.ParentIds[0];
        var rules = school.Catalog!.BehaviorRules!;

        OpinionStore.Set(child, classmate.Id, 30);
        OpinionStore.Set(child, parentId, rules.OpinionChildToParentStart - 15);

        AdvanceTo(school, TuesdayEvening);
        for (var day = 0; day < 3; day++)
        {
            while (school.Clock.Time < WednesdayMorning.AddDays(day))
            {
                school.Tick(0.2d, 5d);
            }
        }

        Assert.True(child.Opinions.TryGetValue(classmate.Id, out var classmateView));
        Assert.True(classmateView < 30);
        Assert.True(classmateView <= 30 - rules.OpinionDriftPerMorning);

        Assert.True(child.Opinions.TryGetValue(parentId, out var parentView));
        Assert.True(parentView > rules.OpinionChildToParentStart - 15);
        Assert.True(parentView <= rules.OpinionChildToParentStart);
    }

    [Fact]
    public void SkipEmpty_AppliesOpinionDrift()
    {
        using var school = OpenEmpty(TuesdayEvening);
        var child = school.Roster!.People.First(person => person.IsStudent && !person.IsParent);
        var classmate = school.Roster.People.First(person =>
            person.IsStudent
            && !person.Id.Equals(child.Id, StringComparison.Ordinal)
            && !OpinionStore.FamilyMemberIds(school.Roster, child).Contains(person.Id));

        OpinionStore.Set(child, classmate.Id, 12);
        var before = child.Opinions[classmate.Id];

        Assert.True(school.TrySkipEmpty().Succeeded);

        Assert.True(child.Opinions.TryGetValue(classmate.Id, out var after));
        Assert.True(after < before);
    }

    [Fact]
    public void SkipFridayToMonday_AppliesHomeEventAndDrift()
    {
        var fridayEvening = new DateTime(2012, 4, 6, 22, 0, 0, DateTimeKind.Utc);
        using var school = OpenEmpty(fridayEvening);
        var child = school.Roster!.People.First(person => person.IsStudent && !person.IsParent);
        var classmate = school.Roster.People.First(person =>
            person.IsStudent
            && !person.Id.Equals(child.Id, StringComparison.Ordinal)
            && !OpinionStore.FamilyMemberIds(school.Roster, child).Contains(person.Id));
        var family = school.Roster.Families.Single(row => row.Id.Equals(child.FamilyId, StringComparison.Ordinal));
        var parentId = family.ParentIds
            .OrderBy(id => id, StringComparer.Ordinal)
            .First(id => school.Roster.People.Any(person => person.Id.Equals(id, StringComparison.Ordinal)));
        var rules = school.Catalog!.BehaviorRules!;
        var parentStart = rules.OpinionChildToParentStart;

        OpinionStore.Set(child, parentId, parentStart);
        OpinionStore.Set(child, classmate.Id, 30);

        Assert.True(school.TrySkipEmpty().Succeeded);
        Assert.Equal(new DateTime(2012, 4, 9, 6, 0, 0, DateTimeKind.Utc), school.Clock.Time);

        Assert.True(child.Opinions.TryGetValue(parentId, out var parentView));
        Assert.NotEqual(parentStart, parentView);

        Assert.True(child.Opinions.TryGetValue(classmate.Id, out var classmateView));
        Assert.True(classmateView < 30);
        Assert.True(classmateView <= 30 - rules.OpinionDriftPerMorning);

        var schoolShift = school.Catalog.Topics.Values
            .Where(topic => !topic.Abstract && topic.Tags.Contains(TopicTags.Family, StringComparer.Ordinal))
            .Select(topic => Math.Abs(topic.OpinionShift))
            .DefaultIfEmpty(2)
            .Max();
        Assert.True(Math.Abs(parentView - parentStart) < schoolShift);
        Assert.Contains(
            school.DayLog,
            row => row.PersonId == child.Id && row.Type.Equals(PersonLogTypes.HomeTalk, StringComparison.Ordinal));
    }

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

    private static School OpenStaffed()
    {
        var (catalog, map) = Vanilla();
        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 1, "Russia", TuesdayMorning);
        var pool = ApplicantPool.Create(catalog, roster, schoolSeed: 1, "Russia", TuesdayMorning);
        var school = School.Create(1, "Мнения", TuesdayMorning, catalog, map);
        school.InstallPeople(roster, seed: 1, "Russia", pool);
        school.ConfigurePresence(weekDays: 5, maxDecisionsPerTick: 10_000);
        return school;
    }

    private static School OpenEmpty(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, "Мнения ночь", start, catalog, map);
        school.InstallPeople(roster, seed: 1, "Russia", pool);
        school.ConfigurePresence(weekDays: 5, maxDecisionsPerTick: 10_000);
        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);
    }
}