using System;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace IdleSpectator;

/// <summary>
/// Vanilla trait/status tooltips for dossier chips.
/// Tip types come from live <see cref="AssetManager.tooltips"/> (not invented keys).
/// </summary>
public static class DossierAssetTips
{
    public const string TraitTipType = "trait";
    public const string StatusTipType = "status";

    private static HashSet<string> _liveTipTypes;
    private static int _liveTipTypesCount = -1;

    public static List<string> EnumerateLiveTooltipTypeIds()
    {
        var ids = new List<string>();
        try
        {
            TooltipLibrary lib = AssetManager.tooltips;
            if (lib?.list == null)
            {
                return ids;
            }

            for (int i = 0; i < lib.list.Count; i++)
            {
                TooltipAsset asset = lib.list[i];
                if (asset != null && !string.IsNullOrEmpty(asset.id))
                {
                    ids.Add(asset.id);
                }
            }
        }
        catch
        {
            // Library can be unavailable during early boot.
        }

        return ids;
    }

    public static bool HasLiveTooltipType(string tipType)
    {
        if (string.IsNullOrEmpty(tipType))
        {
            return false;
        }

        EnsureLiveTipTypes();
        return _liveTipTypes != null && _liveTipTypes.Contains(tipType);
    }

    /// <summary>
    /// Harness audit: dump live tooltip ids; require trait + status tip types exist.
    /// </summary>
    public static bool RunTooltipInventoryAudit(string outputDirectory, out string detail)
    {
        List<string> ids = EnumerateLiveTooltipTypeIds();
        var lines = new List<string>(ids.Count + 1) { "id" };
        for (int i = 0; i < ids.Count; i++)
        {
            lines.Add(ids[i]);
        }

        try
        {
            if (!string.IsNullOrEmpty(outputDirectory))
            {
                Directory.CreateDirectory(outputDirectory);
                File.WriteAllLines(Path.Combine(outputDirectory, "tooltip-library-ids.tsv"), lines);
            }
        }
        catch
        {
            // diagnostic dump only
        }

        bool hasTrait = HasLiveTooltipType(TraitTipType);
        bool hasStatus = HasLiveTooltipType(StatusTipType);
        bool pass = ids.Count > 0 && hasTrait && hasStatus;
        detail = $"tips={ids.Count} trait={hasTrait} status={hasStatus}";
        return pass;
    }

    public static void ShowTraitTip(GameObject host, ActorTrait trait)
    {
        if (host == null || trait == null || !HasLiveTooltipType(TraitTipType))
        {
            return;
        }

        try
        {
            if (!Config.tooltips_active)
            {
                return;
            }

            Tooltip.show(host, TraitTipType, new TooltipData { trait = trait });
        }
        catch
        {
            // Tip surface can be unavailable mid-load.
        }
    }

    public static void ShowStatusTip(GameObject host, Actor actor, StatusAsset asset, string statusId)
    {
        if (host == null || !HasLiveTooltipType(StatusTipType))
        {
            return;
        }

        StatusAsset resolved = asset;
        if (resolved == null && !string.IsNullOrEmpty(statusId))
        {
            resolved = ActivityAssetCatalog.TryGetStatusAsset(statusId);
        }

        if (resolved == null)
        {
            return;
        }

        Status live = FindLiveStatus(actor, resolved.id ?? statusId);
        if (live == null)
        {
            // Vanilla status tip needs a Status instance (time bar + stats).
            return;
        }

        try
        {
            if (!Config.tooltips_active)
            {
                return;
            }

            string locale = "";
            string description = "";
            try
            {
                locale = resolved.getLocaleID() ?? "";
                description = resolved.getDescriptionID() ?? "";
            }
            catch
            {
                // fall through with empty locale keys - showStatus still uses status.asset stats
            }

            Tooltip.show(host, StatusTipType, new TooltipData
            {
                tip_name = locale,
                tip_description = description,
                status = live
            });
        }
        catch
        {
            // Tip surface can be unavailable mid-load.
        }
    }

    public static void HideTip()
    {
        try
        {
            Tooltip.hideTooltip();
        }
        catch
        {
            // ignore
        }
    }

    private static Status FindLiveStatus(Actor actor, string statusId)
    {
        if (actor == null || string.IsNullOrEmpty(statusId))
        {
            return null;
        }

        try
        {
            if (!actor.isAlive())
            {
                return null;
            }

            foreach (Status status in actor.getStatuses())
            {
                if (status?.asset != null
                    && string.Equals(status.asset.id, statusId, StringComparison.Ordinal))
                {
                    return status;
                }
            }
        }
        catch
        {
            return null;
        }

        return null;
    }

    private static void EnsureLiveTipTypes()
    {
        List<string> ids = EnumerateLiveTooltipTypeIds();
        if (_liveTipTypes != null && _liveTipTypesCount == ids.Count)
        {
            return;
        }

        _liveTipTypes = new HashSet<string>(StringComparer.Ordinal);
        for (int i = 0; i < ids.Count; i++)
        {
            if (!string.IsNullOrEmpty(ids[i]))
            {
                _liveTipTypes.Add(ids[i]);
            }
        }

        _liveTipTypesCount = ids.Count;
    }
}

/// <summary>Pointer hover on a dossier trait/status chip root.</summary>
public sealed class DossierChipTip : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
{
    public enum Kind
    {
        Trait,
        Status
    }

    public Kind ChipKind;
    public string AssetId = "";
    public ActorTrait Trait;
    public StatusAsset Status;

    public void BindTrait(ActorTrait trait, string id)
    {
        ChipKind = Kind.Trait;
        Trait = trait;
        Status = null;
        AssetId = id ?? (trait != null ? trait.id : "");
        EnsureHitTarget();
    }

    public void BindStatus(StatusAsset status, string id)
    {
        ChipKind = Kind.Status;
        Status = status;
        Trait = null;
        AssetId = id ?? (status != null ? status.id : "");
        EnsureHitTarget();
    }

    public void Clear()
    {
        Trait = null;
        Status = null;
        AssetId = "";
    }

    public void OnPointerEnter(PointerEventData eventData)
    {
        if (ChipKind == Kind.Trait)
        {
            ActorTrait trait = Trait;
            if (trait == null && !string.IsNullOrEmpty(AssetId))
            {
                try
                {
                    trait = AssetManager.traits?.get(AssetId);
                }
                catch
                {
                    trait = null;
                }
            }

            DossierAssetTips.ShowTraitTip(gameObject, trait);
            return;
        }

        Actor actor = WatchCaption.BoundActor;
        DossierAssetTips.ShowStatusTip(gameObject, actor, Status, AssetId);
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        DossierAssetTips.HideTip();
    }

    private void OnDisable()
    {
        DossierAssetTips.HideTip();
    }

    private void EnsureHitTarget()
    {
        Image hit = GetComponent<Image>();
        if (hit == null)
        {
            hit = gameObject.AddComponent<Image>();
        }

        hit.color = new Color(1f, 1f, 1f, 0.001f);
        hit.raycastTarget = true;
    }
}