using HSchool.Ai;
using HSchool.Ai.Tests;
using HSchool.Content;
using HSchool.People;

namespace HSchool.Ai.Tests;

public class TalkCirclesTests
{
    [Fact]
    public void BoundToLesson_BlocksChatLeisure()
    {
        var (catalog, map, walks) = World();
        var corridor = map.Rooms.First(room => room.Def == "Corridor").Id;
        var decision = DecisionPlanner.Decide(
            catalog,
            map,
            walks,
            new ActorState(
                corridor,
                corridor,
                false,
                false,
                true,
                false,
                false,
                true,
                corridor,
                Needs(),
                Intent.None,
                Talk: new TalkPlannerContext("p1", new Dictionary<string, int>(), new Dictionary<string, string>(), null, false, true, catalog.BehaviorRules)),
            (_, _) => 0);

        Assert.NotEqual(TalkActions.Chat, decision.StartAction);
        Assert.NotEqual(TalkActions.StaffChat, decision.StartAction);
    }

    [Fact]
    public void Student_DoesNotPickStaffChat()
    {
        var (catalog, map, walks) = World();
        var teachersRoom = map.Rooms.First(room => room.Def == "TeachersRoom").Id;
        var decision = DecisionPlanner.Decide(
            catalog,
            map,
            walks,
            new ActorState(
                teachersRoom,
                teachersRoom,
                false,
                false,
                true,
                false,
                false,
                false,
                teachersRoom,
                Needs(social: 0.2f),
                Intent.None,
                Talk: new TalkPlannerContext("p1", new Dictionary<string, int>(), new Dictionary<string, string>(), null, false, true, catalog.BehaviorRules)),
            (_, _) => 0);

        Assert.NotEqual(TalkActions.StaffChat, decision.StartAction);
    }

    [Fact]
    public void PhoneChat_NotOfferedWithoutPhone()
    {
        var (catalog, map, walks) = World();
        var corridor = map.Rooms.First(room => room.Def == "Corridor").Id;
        var decision = DecisionPlanner.Decide(
            catalog,
            map,
            walks,
            Actor(corridor, hasPhone: false),
            (_, _) => 0);

        Assert.NotEqual(TalkActions.PhoneChat, decision.StartAction);
    }

    [Fact]
    public void HasPhone_DetectsBagPhone()
    {
        Assert.False(TalkCircles.HasPhone([]));
        Assert.True(TalkCircles.HasPhone([new InventoryItem("Phone", "Black", 1f, ItemLocations.Bag)]));
    }

    [Fact]
    public void NoSharedLanguage_WeakensOpinionShift()
    {
        var (catalog, _, _) = World();
        var rules = catalog.BehaviorRules!;
        var topic = catalog.Topics["TopicStudy"];
        var from = Person("a", ["RussianLanguage"]);
        var to = Person("b", ["English"]);
        var withLanguage = TalkCircles.OpinionDelta(from, to, topic, 50f, sharedLanguage: true, TalkActions.Chat, ApparelIssue.None, rules, catalog);
        var without = TalkCircles.OpinionDelta(from, to, topic, 50f, sharedLanguage: false, TalkActions.Chat, ApparelIssue.None, rules, catalog);

        Assert.True(withLanguage > without);
        Assert.True(without <= 1);
    }

    [Fact]
    public void HighCommunication_MovesOpinionMoreThanLow_OnSameTopic()
    {
        var (catalog, _, _) = World();
        var rules = catalog.BehaviorRules!;
        var topic = catalog.Topics["TopicSport"];
        var from = Person("a", ["RussianLanguage"]);
        var to = Person("b", ["RussianLanguage"]);
        var high = TalkCircles.OpinionDelta(from, to, topic, 80f, true, TalkActions.Chat, ApparelIssue.None, rules, catalog);
        var low = TalkCircles.OpinionDelta(from, to, topic, 20f, true, TalkActions.Chat, ApparelIssue.None, rules, catalog);

        Assert.True(high > low);
    }

    [Fact]
    public void NodeFriendScore_PullsTowardFriends_NotEnemies()
    {
        var (catalog, _, _) = World();
        var opinions = new Dictionary<string, int>(StringComparer.Ordinal)
        {
            ["friend"] = 50,
            ["enemy"] = -50,
        };
        var nodes = new Dictionary<string, string>(StringComparer.Ordinal)
        {
            ["friend"] = "corridor-a",
            ["enemy"] = "corridor-b",
        };
        var context = new TalkPlannerContext("self", opinions, nodes, null, false, true, catalog.BehaviorRules);
        Assert.True(TalkCircles.NodeFriendScore("corridor-a", "self", context) > 0);
        Assert.True(TalkCircles.NodeFriendScore("corridor-b", "self", context) < 0);
        Assert.Equal(0f, TalkCircles.NodeFriendScore("corridor-a", "self", context with { FriendPullActive = false }));
    }

    [Fact]
    public void LunchNodeBlockedByEnemy_OnlyWhenAnotherSeatExists()
    {
        var (catalog, _, _) = World();
        var opinions = new Dictionary<string, int>(StringComparer.Ordinal) { ["enemy"] = -50 };
        var nodes = new Dictionary<string, string>(StringComparer.Ordinal) { ["enemy"] = "canteen-1" };
        var context = new TalkPlannerContext("self", opinions, nodes, null, false, true, catalog.BehaviorRules);
        Assert.True(TalkCircles.LunchNodeBlockedByEnemy("canteen-1", "self", context, hasAlternative: true));
        Assert.False(TalkCircles.LunchNodeBlockedByEnemy("canteen-1", "self", context, hasAlternative: false));
        Assert.False(TalkCircles.LunchNodeBlockedByEnemy("canteen-2", "self", context, hasAlternative: true));
    }

    [Fact]
    public void GossipAndOutgoing_UseTraitFields_NotHardcodedIdLists()
    {
        var (catalog, _, _) = World();
        Assert.True(catalog.Traits["Gossip"].TalkOpinionMultiplier > 1f);
        Assert.Contains(catalog.Traits["Gossip"].TalkTagWeights, bias => bias.Tag.Equals("gossip", StringComparison.Ordinal));
        Assert.True(catalog.Traits["Outgoing"].TalkInitiative > 1f);
        Assert.Equal(1, catalog.Traits["Outgoing"].TalkCircleBonus);
        Assert.True(TalkCircles.OpinionMultiplier(["Gossip"], catalog) > TalkCircles.OpinionMultiplier([], catalog));
        Assert.True(TalkCircles.Initiative(["Outgoing"], catalog) > TalkCircles.Initiative([], catalog));
    }

    [Fact]
    public void GossipTrait_BiasesPickTopicTowardGossipTag()
    {
        var (catalog, _, _) = World();
        var gossip = Person("g", ["RussianLanguage"]) with { Traits = ["Gossip"] };
        var plain = Person("p", ["RussianLanguage"]);
        var gossipHits = 0;
        var plainHits = 0;
        for (var i = 0; i < 200; i++)
        {
            var seed = Seed.Mix(i, 17, Seed.ApparelSalt);
            var gossipId = TalkCircles.PickTopic(catalog, gossip, age: 14, seed);
            var plainId = TalkCircles.PickTopic(catalog, plain, age: 14, seed);
            if (gossipId is not null && catalog.Topics[gossipId].Tags.Contains("gossip", StringComparer.Ordinal))
            {
                gossipHits++;
            }

            if (plainId is not null && catalog.Topics[plainId].Tags.Contains("gossip", StringComparer.Ordinal))
            {
                plainHits++;
            }
        }

        Assert.True(gossipHits > plainHits);
    }

    [Fact]
    public void PickTopic_IsNotAlwaysTheLastNameAlphabetically()
    {
        var (catalog, _, _) = World();
        var picker = Person("a", ["RussianLanguage"]);
        var picked = new HashSet<string>(StringComparer.Ordinal);
        for (var i = 0; i < 80; i++)
        {
            var id = TalkCircles.PickTopic(catalog, picker, age: 14, Seed.Mix(i, 3, Seed.ApparelSalt));
            Assert.NotNull(id);
            picked.Add(id!);
        }

        Assert.True(picked.Count >= 3);
    }

    [Fact]
    public void AppearanceTopic_UsesDressAppropriateness()
    {
        Assert.Equal(2, TalkCircles.AppearanceModifier(ApparelIssue.None));
        Assert.Equal(-2, TalkCircles.AppearanceModifier(ApparelIssue.Formality));
        Assert.Equal(0, TalkCircles.AppearanceModifier(ApparelIssue.Color));
    }

    [Fact]
    public void CommunicationGain_IsLessThanLessonSkillPerHour()
    {
        var (catalog, _, _) = World();
        var rules = catalog.BehaviorRules!;
        Assert.True(rules.TalkSkillPerHour < rules.LessonSkillPerHour);
        var skill = catalog.Skills["Communication"];
        var afterTalkHour = TalkCircles.CommunicationGain(50f, skill, 1f, rules);
        Assert.Equal(50f + rules.TalkSkillPerHour, afterTalkHour);
    }

    [Fact]
    public void Enemies_AreNotRankedAsInvitees()
    {
        var (catalog, _, _) = World();
        var opinions = new Dictionary<string, int>(StringComparer.Ordinal)
        {
            ["b"] = 50,
            ["c"] = -50,
        };
        var initiator = Person("a", []) with { Opinions = opinions };
        var ranked = TalkCircles.RankInvitees(
            initiator,
            [
                new TalkCircles.Candidate("b", "c1", true, false, false),
                new TalkCircles.Candidate("c", "c1", true, false, false),
            ],
            catalog.BehaviorRules);

        Assert.Equal(["b"], ranked);
    }

    private static ActorState Actor(string node, bool hasPhone)
    {
        var (catalog, _, _) = World();
        return new ActorState(
            node,
            node,
            false,
            false,
            true,
            false,
            false,
            false,
            node,
            Needs(social: 0.2f),
            Intent.None,
            Talk: new TalkPlannerContext("p1", new Dictionary<string, int>(), new Dictionary<string, string>(), null, hasPhone, true, catalog.BehaviorRules));
    }

    private static Dictionary<string, float> Needs(float social = 1f) => new(StringComparer.Ordinal)
    {
        ["Social"] = social,
        ["Hunger"] = 1f,
        ["Sleep"] = 1f,
        ["Toilet"] = 1f,
    };

    private static (DefCatalog Catalog, MapLayout Map, WalkGraph Walks) World()
    {
        var (catalog, map) = Fixtures.Vanilla();
        return (catalog, map, WalkGraph.Build(catalog, map));
    }

    private static Person Person(string id, string[] languages)
    {
        var skills = languages.ToDictionary(skill => skill, _ => 60, StringComparer.Ordinal);
        skills["Communication"] = 50;
        var cases = new CaseTable
        {
            Nom = "A",
            Gen = "A",
            Dat = "A",
            Acc = "A",
            Ins = "A",
            Pre = "A",
        };
        return new Person
        {
            Id = id,
            FamilyId = "f1",
            Female = false,
            BirthDate = new DateTime(2000, 1, 1, 0, 0, 0, DateTimeKind.Utc),
            Name = new PersonName("A", "B", "C", cases, cases, cases),
            IsStudent = true,
            IsStaff = false,
            IsParent = false,
            Numbers = new Dictionary<string, int>(StringComparer.Ordinal),
            Choices = new Dictionary<string, string>(StringComparer.Ordinal),
            Skills = skills,
            Traits = [],
            Needs = new Dictionary<string, float>(StringComparer.Ordinal),
            Opinions = new Dictionary<string, int>(StringComparer.Ordinal),
        };
    }
}