using System;
using System.Collections.Generic;
using UnityEngine;

namespace AlicizaX
{
    public enum PoolResourceLoaderType
    {
        AssetBundle = 0,
        Resources = 1
    }

    public enum PoolMatchMode
    {
        Exact = 0,
        Prefix = 1
    }

    public enum PoolOverflowPolicy
    {
        FailFast = 0,
        InstantiateOneShot = 1,
        AutoExpand = 2,
        RecycleOldestInactive = 3,
        DropNewestRequest = 4
    }

    public enum PoolTrimPolicy
    {
        None = 0,
        IdleOnly = 1,
        IdleAndPriority = 2,
        AggressiveOnLowMemory = 3
    }

    public enum PoolActivationMode
    {
        SetActive = 0,
        SleepWake = 1,
        Custom = 2
    }

    public enum PoolResetMode
    {
        TransformOnly = 0,
        PoolableCallbacks = 1,
        FullReset = 2,
        Custom = 3
    }

    [Serializable]
    public sealed class PoolEntry
    {
        public const string DefaultGroup = "Default";
        public const string DefaultEntryName = "DefaultPool";

        public string entryName = DefaultEntryName;
        public string group = DefaultGroup;
        public string assetPath;
        public PoolMatchMode matchMode = PoolMatchMode.Exact;
        public PoolResourceLoaderType loaderType = PoolResourceLoaderType.AssetBundle;
        public PoolOverflowPolicy overflowPolicy = PoolOverflowPolicy.FailFast;
        public PoolTrimPolicy trimPolicy = PoolTrimPolicy.IdleOnly;
        public PoolActivationMode activationMode = PoolActivationMode.SetActive;
        public PoolResetMode resetMode = PoolResetMode.PoolableCallbacks;

        [Min(0)]
        public int minRetained = 0;

        [Min(1)]
        public int softCapacity = 8;

        [Min(1)]
        public int hardCapacity = 8;

        [Min(0f)]
        public float idleTrimDelay = 30f;

        [Min(0f)]
        public float prefabUnloadDelay = 60f;

        [Min(0f)]
        public float autoRecycleDelay = 0f;

        [Min(1)]
        public int trimBatchPerTick = 2;

        [Min(1)]
        public int warmupBatchPerFrame = 2;

        [Min(0f)]
        public float warmupFrameBudgetMs = 1f;

        public bool allowRuntimeExpand;
        public bool keepPrefabResident;
        public bool aggressiveTrimOnLowMemory;
        public int priority;

        public void Normalize()
        {
            entryName = string.IsNullOrWhiteSpace(entryName) ? DefaultEntryName : entryName.Trim();
            group = string.IsNullOrWhiteSpace(group) ? DefaultGroup : group.Trim();
            assetPath = NormalizeAssetPath(assetPath);
            minRetained = Mathf.Max(0, minRetained);
            softCapacity = Mathf.Max(1, softCapacity);
            hardCapacity = Mathf.Max(softCapacity, hardCapacity);
            minRetained = Mathf.Min(minRetained, hardCapacity);
            idleTrimDelay = Mathf.Max(0f, idleTrimDelay);
            prefabUnloadDelay = Mathf.Max(0f, prefabUnloadDelay);
            autoRecycleDelay = Mathf.Max(0f, autoRecycleDelay);
            trimBatchPerTick = Mathf.Max(1, trimBatchPerTick);
            warmupBatchPerFrame = Mathf.Max(1, warmupBatchPerFrame);
            warmupFrameBudgetMs = Mathf.Max(0f, warmupFrameBudgetMs);
        }

        public bool Matches(string requestedAssetPath, string requestedGroup = null)
        {
            if (string.IsNullOrWhiteSpace(assetPath) || string.IsNullOrWhiteSpace(requestedAssetPath))
            {
                return false;
            }

            if (!string.IsNullOrWhiteSpace(requestedGroup) &&
                !string.Equals(group, requestedGroup, StringComparison.Ordinal))
            {
                return false;
            }

            return matchMode switch
            {
                PoolMatchMode.Exact => string.Equals(requestedAssetPath, assetPath, StringComparison.Ordinal),
                PoolMatchMode.Prefix => requestedAssetPath.StartsWith(assetPath, StringComparison.Ordinal),
                _ => false
            };
        }

        public string BuildResolvedPoolKey(string resolvedAssetPath)
        {
            string concretePath = NormalizeAssetPath(resolvedAssetPath);
            return $"{group}|{(int)matchMode}|{assetPath}|{(int)loaderType}|{concretePath}|{entryName}";
        }

        public static int CompareByPriority(PoolEntry left, PoolEntry right)
        {
            if (ReferenceEquals(left, right))
            {
                return 0;
            }

            if (left == null)
            {
                return 1;
            }

            if (right == null)
            {
                return -1;
            }

            int priorityCompare = right.priority.CompareTo(left.priority);
            if (priorityCompare != 0)
            {
                return priorityCompare;
            }

            int modeCompare = left.matchMode.CompareTo(right.matchMode);
            if (modeCompare != 0)
            {
                return modeCompare;
            }

            int leftLength = left.assetPath?.Length ?? 0;
            int rightLength = right.assetPath?.Length ?? 0;
            int pathLengthCompare = rightLength.CompareTo(leftLength);
            if (pathLengthCompare != 0)
            {
                return pathLengthCompare;
            }

            return string.Compare(left.group, right.group, StringComparison.Ordinal);
        }

        public static string NormalizeAssetPath(string value)
        {
            if (string.IsNullOrWhiteSpace(value))
            {
                return string.Empty;
            }

            return value.Trim().Replace('\\', '/');
        }
    }

    [Serializable]
    public sealed class ResolvedPoolConfig
    {
        public string entryName;
        public string group;
        public string assetPath;
        public PoolMatchMode matchMode;
        public PoolResourceLoaderType loaderType;
        public PoolOverflowPolicy overflowPolicy;
        public PoolTrimPolicy trimPolicy;
        public PoolActivationMode activationMode;
        public PoolResetMode resetMode;
        public int minRetained;
        public int softCapacity;
        public int hardCapacity;
        public float idleTrimDelay;
        public float prefabUnloadDelay;
        public float autoRecycleDelay;
        public int trimBatchPerTick;
        public int warmupBatchPerFrame;
        public float warmupFrameBudgetMs;
        public bool allowRuntimeExpand;
        public bool keepPrefabResident;
        public bool aggressiveTrimOnLowMemory;
        public int priority;

        public string BuildResolvedPoolKey(string resolvedAssetPath)
        {
            string concretePath = PoolEntry.NormalizeAssetPath(resolvedAssetPath);
            return $"{group}|{(int)matchMode}|{assetPath}|{(int)loaderType}|{concretePath}|{entryName}";
        }

        public static ResolvedPoolConfig From(PoolEntry entry)
        {
            if (entry == null)
            {
                throw new ArgumentNullException(nameof(entry));
            }

            return new ResolvedPoolConfig
            {
                entryName = entry.entryName,
                group = entry.group,
                assetPath = entry.assetPath,
                matchMode = entry.matchMode,
                loaderType = entry.loaderType,
                overflowPolicy = entry.overflowPolicy,
                trimPolicy = entry.trimPolicy,
                activationMode = entry.activationMode,
                resetMode = entry.resetMode,
                minRetained = entry.minRetained,
                softCapacity = entry.softCapacity,
                hardCapacity = entry.hardCapacity,
                idleTrimDelay = entry.idleTrimDelay,
                prefabUnloadDelay = entry.prefabUnloadDelay,
                autoRecycleDelay = entry.autoRecycleDelay,
                trimBatchPerTick = entry.trimBatchPerTick,
                warmupBatchPerFrame = entry.warmupBatchPerFrame,
                warmupFrameBudgetMs = entry.warmupFrameBudgetMs,
                allowRuntimeExpand = entry.allowRuntimeExpand,
                keepPrefabResident = entry.keepPrefabResident,
                aggressiveTrimOnLowMemory = entry.aggressiveTrimOnLowMemory,
                priority = entry.priority
            };
        }
    }

    [Serializable]
    public sealed class PoolConfigCatalog
    {
        public readonly List<PoolEntry> entries;

        public PoolConfigCatalog(List<PoolEntry> entries)
        {
            this.entries = entries ?? throw new ArgumentNullException(nameof(entries));
        }
    }
}