using System;
using System.Collections.Generic;
using System.Globalization;
using System.Text;
using UnityEngine;

namespace IdleSpectator;

/// <summary>
/// Single voice owner for saga/caption English.
/// Evidence drives copy; enum/taxonomy names never appear in player-facing strings.
/// </summary>
public static class SagaProse
{
    public static readonly string[] BanList =
    {
        "earned rival",
        "earned a rival",
        "rivalry with",
        "saga hero",
        "fellow saga hero",
        "war foe",
        "plot ally",
        "likely successor",
        "a life in motion",
        "carries a kingdom",
        "holds the pack together",
        "a scheme is still unfolding",
        "lineage hangs by a thread",
        "what they built still needs defending"
    };

    private static readonly HashSet<string> TitleSmallWords = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
    {
        "of", "the", "a", "an", "in", "on", "and", "for", "to"
    };

    private static int _memoryRevision;
    private static long _cacheFocusId;
    private static long _cacheOtherId;
    private static int _cacheRevision = -1;
    private static long _cacheLoverId;
    private static long _cacheFriendId;
    private static RelationEvidence _cacheEvidence;

    public static void BumpMemoryRevision()
    {
        _memoryRevision++;
        _cacheRevision = -1;
    }

    public static int MemoryRevision => _memoryRevision;

    public static bool ContainsBannedPhrase(string text)
    {
        if (string.IsNullOrEmpty(text))
        {
            return false;
        }

        string lower = text.ToLowerInvariant();
        for (int i = 0; i < BanList.Length; i++)
        {
            if (lower.IndexOf(BanList[i], StringComparison.Ordinal) >= 0)
            {
                return true;
            }
        }

        return false;
    }

    public static string TitleLabel(string raw)
    {
        if (string.IsNullOrEmpty(raw))
        {
            return "";
        }

        string titled = ActivityAssetCatalog.TitleCaseWords(raw.Trim());
        if (string.IsNullOrEmpty(titled))
        {
            return "";
        }

        string[] parts = titled.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
        if (parts.Length <= 1)
        {
            return titled;
        }

        var sb = new StringBuilder(titled.Length);
        for (int i = 0; i < parts.Length; i++)
        {
            if (i > 0)
            {
                sb.Append(' ');
            }

            string p = parts[i];
            bool small = i > 0 && i < parts.Length - 1 && TitleSmallWords.Contains(p);
            if (small)
            {
                sb.Append(p.ToLowerInvariant());
            }
            else
            {
                sb.Append(p);
            }
        }

        return sb.ToString();
    }

    public static string Sentence(string raw)
    {
        if (string.IsNullOrEmpty(raw))
        {
            return "";
        }

        string s = raw.Trim();
        if (s.Length == 0)
        {
            return "";
        }

        char first = s[0];
        if (char.IsLetter(first) && char.IsLower(first))
        {
            return char.ToUpperInvariant(first) + s.Substring(1);
        }

        return s;
    }

    /// <summary>Identity title for MCs. Empty when no real role (caller falls back to species/job).</summary>
    public static string Title(LifeSagaSlot slot, Actor actor, LifeSagaLifeMemory memory)
    {
        if (slot != null)
        {
            if (slot.IsKing)
            {
                string kingdom = FirstNonEmpty(slot.KingdomKey, KingdomName(actor));
                return string.IsNullOrEmpty(kingdom)
                    ? TitleLabel("King")
                    : TitleLabel("King of " + kingdom);
            }

            if (slot.IsClanChief)
            {
                return TitleLabel("Clan Chief");
            }

            if (slot.IsLeader)
            {
                string city = FirstNonEmpty(slot.CityKey, CityName(actor));
                return string.IsNullOrEmpty(city)
                    ? TitleLabel("City Leader")
                    : TitleLabel("Leader of " + city);
            }

            if (slot.IsAlpha)
            {
                return TitleLabel("Pack Alpha");
            }

            if (slot.IsArmyCaptain)
            {
                return TitleLabel("Army Captain");
            }

            if (slot.IsFounder)
            {
                return TitleLabel("Founder");
            }

            if (slot.IsPlotAuthor)
            {
                return TitleLabel("Plotter");
            }

            if (slot.IsSingleton)
            {
                return TitleLabel("Last of Their Kind");
            }
        }

        if (memory != null)
        {
            for (int i = 0; i < memory.Facts.Count; i++)
            {
                LifeSagaFact f = memory.Facts[i];
                if (f == null)
                {
                    continue;
                }

                if (f.Kind == LifeSagaFactKind.Founding)
                {
                    return TitleLabel("Founder");
                }

                if (f.Kind == LifeSagaFactKind.RoleChange)
                {
                    string note = f.Note ?? "";
                    if (note.IndexOf("king", StringComparison.OrdinalIgnoreCase) >= 0)
                    {
                        string kingdom = FirstNonEmpty(slot?.KingdomKey, KingdomName(actor));
                        return string.IsNullOrEmpty(kingdom)
                            ? TitleLabel("King")
                            : TitleLabel("King of " + kingdom);
                    }

                    if (note.IndexOf("alpha", StringComparison.OrdinalIgnoreCase) >= 0)
                    {
                        if (LifeSagaRoster.UsesPackLanguage(actor))
                        {
                            return TitleLabel("Pack Alpha");
                        }

                        continue;
                    }

                    if (note.IndexOf("chief", StringComparison.OrdinalIgnoreCase) >= 0
                        || note.IndexOf("clan", StringComparison.OrdinalIgnoreCase) >= 0)
                    {
                        return TitleLabel("Clan Chief");
                    }

                    if (note.IndexOf("leader", StringComparison.OrdinalIgnoreCase) >= 0)
                    {
                        string city = FirstNonEmpty(slot?.CityKey, CityName(actor));
                        return string.IsNullOrEmpty(city)
                            ? TitleLabel("City Leader")
                            : TitleLabel("Leader of " + city);
                    }

                    if (note.IndexOf("captain", StringComparison.OrdinalIgnoreCase) >= 0
                        || note.IndexOf("army", StringComparison.OrdinalIgnoreCase) >= 0)
                    {
                        return TitleLabel("Army Captain");
                    }
                }
            }
        }

        return "";
    }

    public static string FormatFactLine(LifeSagaFact fact)
    {
        if (fact == null)
        {
            return "";
        }

        bool unresolved = !fact.Resolved;
        string line = FormatFactBody(fact, unresolved);
        return Sentence(line);
    }

    public static string FormatLegacyLine(LifeSagaFact fact)
    {
        string body = FormatFactLine(fact);
        if (string.IsNullOrEmpty(body))
        {
            return "";
        }

        if (!string.IsNullOrEmpty(fact?.DateLabel))
        {
            return fact.DateLabel + " · " + body;
        }

        return body;
    }

    public static string StakeLine(LifeSagaFact fact)
    {
        return FormatFactLine(fact);
    }

    public static string CastLabelFromEvidence(RelationEvidence e)
    {
        if (e == null || e.Class == RelationClass.None)
        {
            return "";
        }

        switch (e.Class)
        {
            case RelationClass.Bond:
                return e.BondBroken ? TitleLabel("Once Loved") : TitleLabel("Lover");
            case RelationClass.Friend:
                return e.BestFriend ? TitleLabel("Best Friend") : TitleLabel("Friend");
            case RelationClass.Kin:
                if (e.KinKind == KinKind.Parent) return TitleLabel("Parent");
                if (e.KinKind == KinKind.Child) return TitleLabel("Child");
                if (e.KinKind == KinKind.Heir) return TitleLabel("Heir");
                if (e.KinKind == KinKind.Packmate) return TitleLabel("Packmate");
                return TitleLabel("Kin");
            case RelationClass.Foe:
                if (e.FoeKind == FoeKind.War) return TitleLabel("War Enemy");
                if (e.FoeKind == FoeKind.Plot) return TitleLabel("Plot Enemy");
                if (e.FoeKind == FoeKind.Blood) return TitleLabel("Blood Foe");
                return TitleLabel("Old Foe");
            case RelationClass.PlotPartner:
                return TitleLabel("Plot Partner");
            case RelationClass.Grief:
                return TitleLabel("Once Loved");
            default:
                return "";
        }
    }

    public static string CastLabel(LifeSagaFact fact, Actor other)
    {
        if (fact == null)
        {
            return "";
        }

        RelationEvidence e = EvidenceFromFact(fact, other);
        return CastLabelFromEvidence(e);
    }

    public static string CastLabelLive(string kind)
    {
        switch ((kind ?? "").ToLowerInvariant())
        {
            case "lover": return TitleLabel("Lover");
            case "bestfriend":
            case "best friend": return TitleLabel("Best Friend");
            case "friend": return TitleLabel("Friend");
            case "parent": return TitleLabel("Parent");
            case "child": return TitleLabel("Child");
            case "heir": return TitleLabel("Heir");
            case "packmate": return TitleLabel("Packmate");
            case "kin": return TitleLabel("Kin");
            case "onceloved":
            case "once loved":
            case "lost lover": return TitleLabel("Once Loved");
            default: return TitleLabel(kind ?? "");
        }
    }

    public static RelationEvidence ResolveRelation(long focusId, long otherId, Actor focus, Actor other)
    {
        if (focusId == 0 || otherId == 0 || focusId == otherId)
        {
            return RelationEvidence.None;
        }

        long loverId = focus != null ? EventFeedUtil.SafeId(ActorRelation.GetLover(focus)) : 0;
        long friendId = focus != null ? EventFeedUtil.SafeId(ActorRelation.GetBestFriend(focus)) : 0;
        if (_cacheFocusId == focusId
            && _cacheOtherId == otherId
            && _cacheRevision == _memoryRevision
            && _cacheLoverId == loverId
            && _cacheFriendId == friendId
            && _cacheEvidence != null)
        {
            return _cacheEvidence;
        }

        RelationEvidence best = RelationEvidence.None;
        int bestPri = 99;

        // Live bond
        if (loverId == otherId)
        {
            Consider(ref best, ref bestPri, new RelationEvidence
            {
                Class = RelationClass.Bond,
                OtherId = otherId,
                Priority = 1
            });
        }

        // Live friend
        if (friendId == otherId)
        {
            Consider(ref best, ref bestPri, new RelationEvidence
            {
                Class = RelationClass.Friend,
                BestFriend = true,
                OtherId = otherId,
                Priority = 5
            });
        }

        // Live kin
        if (focus != null && other != null)
        {
            foreach (Actor p in ActorRelation.EnumerateParents(focus, 4))
            {
                if (EventFeedUtil.SafeId(p) == otherId)
                {
                    Consider(ref best, ref bestPri, new RelationEvidence
                    {
                        Class = RelationClass.Kin,
                        KinKind = KinKind.Parent,
                        OtherId = otherId,
                        Priority = 4
                    });
                    break;
                }
            }

            foreach (Actor c in ActorRelation.EnumerateChildren(focus, 4))
            {
                if (EventFeedUtil.SafeId(c) == otherId)
                {
                    Consider(ref best, ref bestPri, new RelationEvidence
                    {
                        Class = RelationClass.Kin,
                        KinKind = KinKind.Child,
                        OtherId = otherId,
                        Priority = 4
                    });
                    break;
                }
            }

            if (LifeSagaPresentation.TryGetLikelySuccessor(focus, out Actor heir, out _)
                && EventFeedUtil.SafeId(heir) == otherId)
            {
                Consider(ref best, ref bestPri, new RelationEvidence
                {
                    Class = RelationClass.Kin,
                    KinKind = KinKind.Heir,
                    OtherId = otherId,
                    Priority = 4
                });
            }
        }

        LifeSagaLifeMemory mem = LifeSagaMemory.Get(focusId);
        bool alsoBond = loverId == otherId;
        bool alsoFoe = false;
        RelationEvidence foeEv = null;

        if (mem != null)
        {
            for (int i = 0; i < mem.Facts.Count; i++)
            {
                LifeSagaFact f = mem.Facts[i];
                if (f == null || f.OtherId != otherId)
                {
                    continue;
                }

                RelationEvidence fromFact = EvidenceFromFact(f, other);
                if (fromFact.Class == RelationClass.Bond && fromFact.BondBroken)
                {
                    Consider(ref best, ref bestPri, fromFact);
                }
                else if (fromFact.Class == RelationClass.Foe)
                {
                    alsoFoe = true;
                    foeEv = fromFact;
                    Consider(ref best, ref bestPri, fromFact);
                }
                else if (fromFact.Class != RelationClass.None)
                {
                    Consider(ref best, ref bestPri, fromFact);
                }
            }
        }

        if (LifeSagaMemory.TryGetEarnedRival(focusId, out LifeSagaFact rival)
            && rival != null
            && rival.OtherId == otherId)
        {
            RelationEvidence r = EvidenceFromFact(rival, other);
            alsoFoe = true;
            foeEv = r;
            Consider(ref best, ref bestPri, r);
        }

        if (best != null && best.Class != RelationClass.None)
        {
            best.AlsoBond = alsoBond || best.Class == RelationClass.Bond;
            best.AlsoFoe = alsoFoe || best.Class == RelationClass.Foe;
            if (foeEv != null && best.Class == RelationClass.Bond)
            {
                best.FoeKind = foeEv.FoeKind;
                best.RematchCount = foeEv.RematchCount;
                best.RealmOrPlot = foeEv.RealmOrPlot;
            }
        }

        _cacheFocusId = focusId;
        _cacheOtherId = otherId;
        _cacheRevision = _memoryRevision;
        _cacheLoverId = loverId;
        _cacheFriendId = friendId;
        _cacheEvidence = best ?? RelationEvidence.None;
        return _cacheEvidence;
    }

    public static string ClassifyTipVerb(string tipLabel)
    {
        string t = (tipLabel ?? "").ToLowerInvariant();
        if (t.IndexOf("fight", StringComparison.Ordinal) >= 0
            || t.IndexOf("duel", StringComparison.Ordinal) >= 0
            || t.IndexOf("battle", StringComparison.Ordinal) >= 0
            || t.IndexOf("skirmish", StringComparison.Ordinal) >= 0
            || t.IndexOf("mass -", StringComparison.Ordinal) >= 0
            || t.IndexOf("war -", StringComparison.Ordinal) >= 0
            || t.IndexOf("attack", StringComparison.Ordinal) >= 0
            || t.IndexOf("slay", StringComparison.Ordinal) >= 0
            || t.IndexOf("killed", StringComparison.Ordinal) >= 0)
        {
            return "combat";
        }

        if (t.IndexOf("lover", StringComparison.Ordinal) >= 0
            || t.IndexOf("love", StringComparison.Ordinal) >= 0
            || t.IndexOf("smitten", StringComparison.Ordinal) >= 0
            || t.IndexOf("kiss", StringComparison.Ordinal) >= 0
            || t.IndexOf("intimacy", StringComparison.Ordinal) >= 0
            || t.IndexOf("bound", StringComparison.Ordinal) >= 0
            || t.IndexOf("mate", StringComparison.Ordinal) >= 0
            || t.IndexOf("pregnant", StringComparison.Ordinal) >= 0)
        {
            return "love";
        }

        if (t.IndexOf("mourn", StringComparison.Ordinal) >= 0
            || t.IndexOf("grief", StringComparison.Ordinal) >= 0
            || t.IndexOf("fallen", StringComparison.Ordinal) >= 0
            || t.IndexOf("stands over", StringComparison.Ordinal) >= 0)
        {
            return "grief";
        }

        if (t.IndexOf("plot", StringComparison.Ordinal) >= 0)
        {
            return "plot";
        }

        // Sleep / dream / rest tips hitch poorly against closed biography stakes.
        if (t.IndexOf("sleep", StringComparison.Ordinal) >= 0
            || t.IndexOf("dream", StringComparison.Ordinal) >= 0
            || t.IndexOf("asleep", StringComparison.Ordinal) >= 0
            || t.IndexOf("wakes", StringComparison.Ordinal) >= 0
            || t.IndexOf("rests", StringComparison.Ordinal) >= 0
            || t.IndexOf("naps", StringComparison.Ordinal) >= 0)
        {
            return "rest";
        }

        return "other";
    }

    public static string RoleFallbackStake(LifeSagaAdmissionReason reason, LifeSagaSlot slot, Actor actor)
    {
        switch (reason)
        {
            case LifeSagaAdmissionReason.King:
            {
                string k = FirstNonEmpty(slot?.KingdomKey, KingdomName(actor));
                return string.IsNullOrEmpty(k) ? Sentence("Rules a kingdom") : Sentence("Rules " + k);
            }
            case LifeSagaAdmissionReason.Alpha:
                return LifeSagaRoster.UsesPackLanguage(actor)
                    ? Sentence("Leads the pack")
                    : Sentence("Leads a family");
            case LifeSagaAdmissionReason.PlotAuthor:
                return Sentence("Leads a plot");
            case LifeSagaAdmissionReason.Singleton:
                return Sentence("Last of their kind");
            case LifeSagaAdmissionReason.RecurringAntagonist:
                return Sentence("A recurring threat");
            case LifeSagaAdmissionReason.RareCreature:
                return Sentence("One of few of their kind");
            case LifeSagaAdmissionReason.SpecialCreature:
                return Sentence("A rare power in the world");
            case LifeSagaAdmissionReason.Founder:
                return Sentence("Defends what they founded");
            case LifeSagaAdmissionReason.CityLeader:
            {
                string c = FirstNonEmpty(slot?.CityKey, CityName(actor));
                return string.IsNullOrEmpty(c) ? Sentence("Leads a city") : Sentence("Leads " + c);
            }
            case LifeSagaAdmissionReason.EmergingStory:
                return Sentence("A life in motion");
            default:
                return "";
        }
    }

    /// <summary>True when a remembered role change merely restates the current Identity title.</summary>
    public static bool RoleChangeEchoesTitle(LifeSagaFact fact, string title)
    {
        if (fact == null
            || fact.Kind != LifeSagaFactKind.RoleChange
            || string.IsNullOrEmpty(title))
        {
            return false;
        }

        string body = FormatFactLine(fact).ToLowerInvariant();
        string current = title.ToLowerInvariant();
        string[] roles =
        {
            "king", "queen", "leader", "alpha", "chief", "captain", "founder", "plotter"
        };
        for (int i = 0; i < roles.Length; i++)
        {
            string role = roles[i];
            if (body.IndexOf(role, StringComparison.Ordinal) >= 0
                && current.IndexOf(role, StringComparison.Ordinal) >= 0)
            {
                return true;
            }
        }

        return false;
    }

    public static bool IsEnsembleTip(string tip)
    {
        if (string.IsNullOrEmpty(tip))
        {
            return false;
        }

        string t = tip.TrimStart();
        return t.StartsWith("Duel", StringComparison.OrdinalIgnoreCase)
               || t.StartsWith("Skirmish", StringComparison.OrdinalIgnoreCase)
               || t.StartsWith("Battle", StringComparison.OrdinalIgnoreCase)
               || t.StartsWith("Mass", StringComparison.OrdinalIgnoreCase)
               || t.StartsWith("War", StringComparison.OrdinalIgnoreCase)
               || t.StartsWith("Plot", StringComparison.OrdinalIgnoreCase)
               || t.StartsWith("Pack", StringComparison.OrdinalIgnoreCase)
               || t.StartsWith("Outbreak", StringComparison.OrdinalIgnoreCase);
    }

    private static void Consider(ref RelationEvidence best, ref int bestPri, RelationEvidence cand)
    {
        if (cand == null || cand.Class == RelationClass.None)
        {
            return;
        }

        int pri = cand.Priority > 0 ? cand.Priority : ClassPriority(cand.Class);
        if (pri < bestPri)
        {
            bestPri = pri;
            best = cand;
            best.Priority = pri;
        }
    }

    private static int ClassPriority(RelationClass c)
    {
        switch (c)
        {
            case RelationClass.Bond: return 1;
            case RelationClass.Foe: return 2;
            case RelationClass.PlotPartner: return 3;
            case RelationClass.Kin: return 4;
            case RelationClass.Friend: return 5;
            case RelationClass.Grief: return 1;
            default: return 9;
        }
    }

    private static RelationEvidence EvidenceFromFact(LifeSagaFact fact, Actor other)
    {
        if (fact == null)
        {
            return RelationEvidence.None;
        }

        var e = new RelationEvidence { OtherId = fact.OtherId };
        switch (fact.Kind)
        {
            case LifeSagaFactKind.BondFormed:
                e.Class = RelationClass.Bond;
                e.Priority = 1;
                return e;
            case LifeSagaFactKind.BondBroken:
                e.Class = RelationClass.Bond;
                e.BondBroken = true;
                e.Priority = 1;
                return e;
            case LifeSagaFactKind.FriendFormed:
                e.Class = RelationClass.Friend;
                e.Priority = 5;
                return e;
            case LifeSagaFactKind.ParentChild:
                e.Class = RelationClass.Kin;
                e.KinKind = LifeSagaMemory.IsParentPerspective(fact) ? KinKind.Child : KinKind.Parent;
                e.Priority = 4;
                return e;
            case LifeSagaFactKind.RivalEarned:
                e.Class = RelationClass.Foe;
                e.Priority = 2;
                FillFoeFromNote(e, fact.Note);
                return e;
            case LifeSagaFactKind.WarJoin:
                e.Class = RelationClass.Foe;
                e.FoeKind = FoeKind.War;
                e.RealmOrPlot = FirstNonEmpty(fact.Note, fact.KingdomKey);
                e.Priority = 2;
                return e;
            case LifeSagaFactKind.PlotJoin:
                // Same-side plot join = partner; opposition notes use RivalEarned.
                e.Class = RelationClass.PlotPartner;
                e.RealmOrPlot = fact.Note ?? "";
                e.Priority = 3;
                return e;
            case LifeSagaFactKind.Death:
            case LifeSagaFactKind.HardArcGrief:
                e.Class = RelationClass.Grief;
                e.Priority = 1;
                return e;
            case LifeSagaFactKind.Kill:
            case LifeSagaFactKind.HardArcCombat:
            case LifeSagaFactKind.CombatEncounter:
                // Not automatically a cast foe unless RivalEarned.
                return RelationEvidence.None;
            default:
                return RelationEvidence.None;
        }
    }

    private static void FillFoeFromNote(RelationEvidence e, string note)
    {
        if (string.IsNullOrEmpty(note))
        {
            e.FoeKind = FoeKind.Generic;
            return;
        }

        if (note.StartsWith("opposed_in_war:", StringComparison.Ordinal))
        {
            e.FoeKind = FoeKind.War;
            e.RealmOrPlot = note.Substring("opposed_in_war:".Length).Trim();
            return;
        }

        if (note.StartsWith("opposed_in_plot:", StringComparison.Ordinal))
        {
            e.FoeKind = FoeKind.Plot;
            e.RealmOrPlot = note.Substring("opposed_in_plot:".Length).Trim();
            return;
        }

        if (note.StartsWith("killed_kin", StringComparison.Ordinal)
            || note.StartsWith("kin_slain", StringComparison.Ordinal))
        {
            e.FoeKind = FoeKind.Blood;
            return;
        }

        if (note.StartsWith("mc_rematch:", StringComparison.Ordinal)
            || note.StartsWith("repeated_encounters:", StringComparison.Ordinal))
        {
            e.FoeKind = FoeKind.Rematch;
            int colon = note.IndexOf(':');
            if (colon >= 0 && colon + 1 < note.Length
                && int.TryParse(note.Substring(colon + 1).Trim(), NumberStyles.Integer, CultureInfo.InvariantCulture, out int n))
            {
                e.RematchCount = n;
            }

            return;
        }

        e.FoeKind = FoeKind.Generic;
    }

    private static string FormatFactBody(LifeSagaFact fact, bool unresolved)
    {
        string other = !string.IsNullOrEmpty(fact.Other.Name) ? fact.Other.Name : "";
        switch (fact.Kind)
        {
            case LifeSagaFactKind.BondFormed:
                return string.IsNullOrEmpty(other) ? "Found love" : "Bound with " + other;
            case LifeSagaFactKind.BondBroken:
                return string.IsNullOrEmpty(other) ? "Lost a lover" : "Lost " + other;
            case LifeSagaFactKind.FriendFormed:
                return string.IsNullOrEmpty(other) ? "Made a true friend" : "Befriended " + other;
            case LifeSagaFactKind.ParentChild:
                if (!LifeSagaMemory.IsParentPerspective(fact))
                {
                    return string.IsNullOrEmpty(other) ? "Was born" : "Born to " + other;
                }

                return string.IsNullOrEmpty(other) ? "Had a child" : "Had child " + other;
            case LifeSagaFactKind.Kill:
                return string.IsNullOrEmpty(other) ? "Took a life" : "Slew " + other;
            case LifeSagaFactKind.Death:
                return string.IsNullOrEmpty(other) ? "Died" : "Slain by " + other;
            case LifeSagaFactKind.RivalEarned:
                return FormatRivalBody(fact, other);
            case LifeSagaFactKind.WarJoin:
            {
                string realm = FirstNonEmpty(fact.Note, fact.KingdomKey);
                if (unresolved)
                {
                    if (!string.IsNullOrEmpty(other) && !string.IsNullOrEmpty(realm))
                    {
                        return "Still at war with " + other + " of " + realm;
                    }

                    if (!string.IsNullOrEmpty(other))
                    {
                        return "Still at war with " + other;
                    }

                    return string.IsNullOrEmpty(realm) ? "Still at war" : "Still at war over " + realm;
                }

                if (!string.IsNullOrEmpty(other) && !string.IsNullOrEmpty(realm))
                {
                    return "Went to war against " + other + " (" + realm + ")";
                }

                if (!string.IsNullOrEmpty(other))
                {
                    return "Went to war against " + other;
                }

                return string.IsNullOrEmpty(realm) ? "Entered a war" : "Went to war (" + realm + ")";
            }
            case LifeSagaFactKind.WarEnd:
            {
                string realm = FirstNonEmpty(fact.Note, fact.KingdomKey);
                return string.IsNullOrEmpty(realm) ? "War ended" : "War with " + realm + " ended";
            }
            case LifeSagaFactKind.PlotJoin:
            {
                string plot = fact.Note ?? "";
                if (unresolved)
                {
                    if (!string.IsNullOrEmpty(other) && !string.IsNullOrEmpty(plot))
                    {
                        return "Still tangled in " + plot + " with " + other;
                    }

                    if (!string.IsNullOrEmpty(other))
                    {
                        return "Still plotting with " + other;
                    }

                    return string.IsNullOrEmpty(plot) ? "Still tangled in a plot" : "Still tangled in " + plot;
                }

                if (!string.IsNullOrEmpty(other) && !string.IsNullOrEmpty(plot))
                {
                    return "Plotted with " + other + " (" + plot + ")";
                }

                if (!string.IsNullOrEmpty(other))
                {
                    return "Plotted with " + other;
                }

                return string.IsNullOrEmpty(plot) ? "Joined a plot" : "Joined " + plot;
            }
            case LifeSagaFactKind.PlotEnd:
            {
                string plot = fact.Note ?? "";
                return string.IsNullOrEmpty(plot) ? "Plot resolved" : "Plot resolved (" + plot + ")";
            }
            case LifeSagaFactKind.Founding:
                return !string.IsNullOrEmpty(fact.Note) ? "Founded " + fact.Note : "Founded a new home";
            case LifeSagaFactKind.RoleChange:
                return FormatRoleNote(fact.Note);
            case LifeSagaFactKind.HomeGained:
                return "Found a home";
            case LifeSagaFactKind.HomeLost:
                return "Lost a home";
            case LifeSagaFactKind.HardArcLove:
                return FirstNonEmpty(StripBannedNote(fact.Note), "Bound with someone close");
            case LifeSagaFactKind.HardArcGrief:
                return FirstNonEmpty(StripBannedNote(fact.Note), "Grief took hold");
            case LifeSagaFactKind.HardArcCombat:
                return FirstNonEmpty(StripBannedNote(fact.Note), "Survived a hard fight");
            case LifeSagaFactKind.HardArcWar:
                return FirstNonEmpty(StripBannedNote(fact.Note), "Marked by war");
            case LifeSagaFactKind.HardArcPlot:
                return FirstNonEmpty(StripBannedNote(fact.Note), "Entangled in a plot");
            case LifeSagaFactKind.CombatEncounter:
                return string.IsNullOrEmpty(other) ? "Fought again" : "Clashed with " + other;
            default:
                return FirstNonEmpty(StripBannedNote(fact.Note), "A turning point");
        }
    }

    private static string FormatRivalBody(LifeSagaFact fact, string other)
    {
        string note = fact.Note ?? "";
        if (note.StartsWith("opposed_in_war:", StringComparison.Ordinal))
        {
            string realm = note.Substring("opposed_in_war:".Length).Trim();
            if (!fact.Resolved)
            {
                if (!string.IsNullOrEmpty(other) && !string.IsNullOrEmpty(realm))
                {
                    return "Still at war with " + other + " of " + realm;
                }

                return string.IsNullOrEmpty(other) ? "Still at war" : "Still at war with " + other;
            }

            return string.IsNullOrEmpty(other) ? "Went to war" : "Went to war against " + other;
        }

        if (note.StartsWith("opposed_in_plot:", StringComparison.Ordinal))
        {
            string plot = note.Substring("opposed_in_plot:".Length).Trim();
            if (!fact.Resolved)
            {
                if (!string.IsNullOrEmpty(other) && !string.IsNullOrEmpty(plot))
                {
                    return "Locked against " + other + " in " + plot;
                }

                return string.IsNullOrEmpty(other) ? "Locked in a plot" : "Locked against " + other;
            }

            return string.IsNullOrEmpty(other) ? "Opposed in a plot" : "Opposed " + other + " in a plot";
        }

        if (note.StartsWith("killed_kin", StringComparison.Ordinal)
            || note.StartsWith("kin_slain", StringComparison.Ordinal))
        {
            return string.IsNullOrEmpty(other) ? "Blood feud over kin" : "Blood feud with " + other;
        }

        if (note.StartsWith("mc_rematch:", StringComparison.Ordinal)
            || note.StartsWith("repeated_encounters:", StringComparison.Ordinal))
        {
            int colon = note.IndexOf(':');
            int n = 0;
            if (colon >= 0)
            {
                int.TryParse(note.Substring(colon + 1).Trim(), NumberStyles.Integer, CultureInfo.InvariantCulture, out n);
            }

            if (n >= 2 && !string.IsNullOrEmpty(other))
            {
                return "Has clashed " + n + " times with " + other;
            }

            return string.IsNullOrEmpty(other) ? "Fought again and again" : "Fought " + other + " again and again";
        }

        return string.IsNullOrEmpty(other) ? "Feud continues" : "Feud with " + other;
    }

    private static string FormatRoleNote(string roleId)
    {
        if (string.IsNullOrEmpty(roleId))
        {
            return "Rose in standing";
        }

        if (roleId.IndexOf("king", StringComparison.OrdinalIgnoreCase) >= 0)
        {
            return "Became " + TitleLabel("King");
        }

        if (roleId.IndexOf("leader", StringComparison.OrdinalIgnoreCase) >= 0)
        {
            return "Became a " + TitleLabel("Leader");
        }

        if (roleId.IndexOf("alpha", StringComparison.OrdinalIgnoreCase) >= 0)
        {
            return "Became " + TitleLabel("Pack Alpha");
        }

        if (roleId.IndexOf("chief", StringComparison.OrdinalIgnoreCase) >= 0
            || roleId.IndexOf("clan", StringComparison.OrdinalIgnoreCase) >= 0)
        {
            return "Became " + TitleLabel("Clan Chief");
        }

        if (roleId.IndexOf("captain", StringComparison.OrdinalIgnoreCase) >= 0
            || roleId.IndexOf("army", StringComparison.OrdinalIgnoreCase) >= 0)
        {
            return "Became " + TitleLabel("Army Captain");
        }

        // Unknown game/mod role ids are evidence, not player-facing copy.
        return "Rose in standing";
    }

    private static string StripBannedNote(string note)
    {
        if (string.IsNullOrEmpty(note) || ContainsBannedPhrase(note))
        {
            return "";
        }

        return note;
    }

    private static string KingdomName(Actor actor)
    {
        try
        {
            return actor?.kingdom != null ? actor.kingdom.name ?? "" : "";
        }
        catch
        {
            return "";
        }
    }

    private static string CityName(Actor actor)
    {
        try
        {
            return actor?.city != null ? actor.city.name ?? "" : "";
        }
        catch
        {
            return "";
        }
    }

    private static string FirstNonEmpty(params string[] values)
    {
        if (values == null)
        {
            return "";
        }

        for (int i = 0; i < values.Length; i++)
        {
            if (!string.IsNullOrEmpty(values[i]))
            {
                return values[i];
            }
        }

        return "";
    }
}

public enum RelationClass
{
    None = 0,
    Bond,
    Friend,
    Kin,
    Foe,
    PlotPartner,
    Grief
}

public enum KinKind
{
    None = 0,
    Parent,
    Child,
    Heir,
    Packmate,
    Kin
}

public enum FoeKind
{
    None = 0,
    Rematch,
    War,
    Plot,
    Blood,
    Generic
}

public sealed class RelationEvidence
{
    public static readonly RelationEvidence None = new RelationEvidence();

    public RelationClass Class;
    public KinKind KinKind;
    public FoeKind FoeKind;
    public bool BondBroken;
    public bool BestFriend;
    public bool AlsoBond;
    public bool AlsoFoe;
    public int RematchCount;
    public string RealmOrPlot = "";
    public long OtherId;
    public int Priority;
}