/*
 * Computes HUD layout addon name hashes at runtime using the game's own hash function.
 * AddonConfigEntry uses CRC32 of "name_a" - UIGlobals.ComputeAddonNameHash does this.
 * This ensures correct hashes across game patches without hardcoded values.
 */

using FFXIVClientStructs.FFXIV.Client.UI;
using System;
using System.Collections.Generic;

namespace HSUI.Helpers
{
    public static class HudLayoutHashHelper
    {
        private static readonly Dictionary<string, uint> _cache = new();
        private static DateTime _lastResolveErrorLog = DateTime.MinValue;
        private const double ResolveErrorLogIntervalSeconds = 10.0;

        /// <summary>Get AddonNameHash for a layout addon. Addon name is without _a suffix (e.g. "_ParameterWidget").</summary>
        public static uint GetHash(string addonName)
        {
            if (string.IsNullOrEmpty(addonName))
                return 0;

            if (_cache.TryGetValue(addonName, out var cached))
                return cached;

            try
            {
                uint hash = UIGlobals.ComputeAddonNameHash(addonName);
                _cache[addonName] = hash;
                return hash;
            }
            catch (Exception ex)
            {
                var now = DateTime.UtcNow;
                if ((now - _lastResolveErrorLog).TotalSeconds >= ResolveErrorLogIntervalSeconds)
                {
                    _lastResolveErrorLog = now;
                    Plugin.Logger.Warning($"[HSUI] HudLayoutHashHelper: resolver not ready (e.g. '{addonName}'): {ex.Message}");
                }
                return 0;
            }
        }

        /// <summary>Dump all HudLayout addon names and their hashes to the log (for debugging).</summary>
        public static void DumpHudLayoutAddonsToLog()
        {
            try
            {
                var span = FFXIVClientStructs.FFXIV.Client.UI.Misc.HudLayoutAddon.GetSpan();
                Plugin.Logger.Information("[HSUI] HudLayout addon names and hashes (name -> hash):");
                for (int i = 0; i < span.Length; i++)
                {
                    ref var addon = ref span[i];
                    if (!addon.AddonName.HasValue) continue;
                    string name = addon.AddonName.ToString() ?? "(null)";
                    if (string.IsNullOrEmpty(name)) continue;
                    uint hash = GetHash(name);
                    Plugin.Logger.Information($"  [{i}] {name} -> 0x{hash:X8}");
                }
            }
            catch (Exception ex)
            {
                Plugin.Logger.Error($"[HSUI] HudLayoutHashHelper.DumpHudLayoutAddonsToLog failed: {ex.Message}\n{ex.StackTrace}");
            }
        }
    }
}