using System;

namespace IdleSpectator;

/// <summary>
/// Editorial meaning of a camera candidate. This is deliberately separate from numeric
/// spectacle strength: a loud event can still be context, while a quiet state change can
/// advance a life story.
/// </summary>
public static class NarrativeFunctionPolicy
{
    public static NarrativeFunction Classify(InterestCandidate candidate)
    {
        if (candidate == null) return NarrativeFunction.Noise;
        if (candidate.HasNarrativeFunction) return candidate.NarrativeFunction;

        string asset = (candidate.AssetId ?? "").ToLowerInvariant();
        string category = (candidate.Category ?? "").ToLowerInvariant();
        string source = (candidate.Source ?? "").ToLowerInvariant();
        string verb = (candidate.Verb ?? "").ToLowerInvariant();
        string text = asset + " " + category + " " + source + " " + verb;

        if (ContainsAny(text, "add_child", "child_born", "new_child", "became_parent"))
            return NarrativeFunction.Consequence;
        if (ContainsAny(text, "clear_lover", "lover_died", "partner_died", "grief"))
            return NarrativeFunction.TurningPoint;
        if (ContainsAny(text, "set_lover", "new_family", "married", "bond_formed"))
            return NarrativeFunction.ThreadOpener;
        if (ContainsAny(text, "war_ended", "plot_ended", "plot_resolved", "recovered"))
            return NarrativeFunction.Resolution;
        if (ContainsAny(text, "death", "died", "killed", "destroyed", "role_lost", "lost_home"))
            return NarrativeFunction.Consequence;
        if (ContainsAny(text, "become_king", "new_king", "founded", "new_city", "role_gained"))
            return NarrativeFunction.TurningPoint;
        if (ContainsAny(text, "war_started", "joined_war", "plot_joined", "betray", "rival"))
            return NarrativeFunction.Escalation;

        switch (candidate.Completion)
        {
            case InterestCompletionKind.CombatActive:
            case InterestCompletionKind.WarFront:
            case InterestCompletionKind.PlotActive:
            case InterestCompletionKind.StatusOutbreak:
                return NarrativeFunction.Escalation;
            case InterestCompletionKind.HappinessGrief:
                return NarrativeFunction.TurningPoint;
            case InterestCompletionKind.EarthquakeActive:
                return NarrativeFunction.WorldContext;
            case InterestCompletionKind.FamilyPack:
                return NarrativeFunction.Development;
            case InterestCompletionKind.ActivityActive:
                return candidate.LeadKind == InterestLeadKind.EventLed
                    ? NarrativeFunction.Development
                    : NarrativeFunction.CharacterTexture;
            case InterestCompletionKind.CharacterVignette:
            case InterestCompletionKind.StatusPhase:
                return NarrativeFunction.CharacterTexture;
        }

        if (StoryReason.IsStoryAsset(candidate.AssetId)
            || source.IndexOf("story", StringComparison.Ordinal) >= 0)
        {
            return NarrativeFunction.Development;
        }

        if (candidate.LeadKind == InterestLeadKind.CharacterLed)
            return NarrativeFunction.CharacterTexture;
        if (candidate.EventStrength >= 95f) return NarrativeFunction.WorldContext;
        if (candidate.EventStrength >= 70f) return NarrativeFunction.Development;
        return candidate.EventStrength < 35f
            ? NarrativeFunction.Noise
            : NarrativeFunction.CharacterTexture;
    }

    public static bool ChangesStoryState(NarrativeFunction function)
    {
        return function == NarrativeFunction.ThreadOpener
               || function == NarrativeFunction.Development
               || function == NarrativeFunction.Escalation
               || function == NarrativeFunction.TurningPoint
               || function == NarrativeFunction.Resolution
               || function == NarrativeFunction.Consequence;
    }

    public static float EditorialBonus(NarrativeFunction function)
    {
        switch (function)
        {
            case NarrativeFunction.ThreadOpener: return 8f;
            case NarrativeFunction.Development: return 12f;
            case NarrativeFunction.Escalation: return 18f;
            case NarrativeFunction.TurningPoint: return 28f;
            case NarrativeFunction.Resolution: return 32f;
            case NarrativeFunction.Consequence: return 24f;
            case NarrativeFunction.WorldContext: return 10f;
            case NarrativeFunction.CharacterTexture: return -15f;
            default: return -35f;
        }
    }

    private static bool ContainsAny(string text, params string[] needles)
    {
        for (int i = 0; i < needles.Length; i++)
        {
            if (text.IndexOf(needles[i], StringComparison.Ordinal) >= 0) return true;
        }

        return false;
    }
}