Rewrite stats weight and item score calculation

src/factory/StatsWeightCalculator.h

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it
+ * and/or modify it under version 2 of the License, or (at your option), any later version.
+ */
+
+#ifndef _PLAYERBOT_GEARSCORECALCULATOR_H
+#define _PLAYERBOT_GEARSCORECALCULATOR_H
+
+#include "Player.h"
+#include "StatsCollector.h"
+
+#define ITEM_SUBCLASS_MASK_SINGLE_HAND                                                                        \
+    ((1 << ITEM_SUBCLASS_WEAPON_AXE) | (1 << ITEM_SUBCLASS_WEAPON_MACE) | (1 << ITEM_SUBCLASS_WEAPON_SWORD) | \
+     (1 << ITEM_SUBCLASS_WEAPON_DAGGER) | (1 << ITEM_SUBCLASS_WEAPON_FIST))
+
+enum StatsOverflowThreshold {
+    SPELL_HIT_OVERFLOW = 17,
+    MELEE_HIT_OVERFLOW = 8,
+    RANGED_HIT_OVERFLOW = 8,
+    EXPERTISE_OVERFLOW = 26,
+    DEFENSE_OVERFLOW = 140,
+    ARMOR_PENETRATION_OVERFLOW = 100
+};
+
+class StatsWeightCalculator
+{
+public:
+    StatsWeightCalculator(Player* player);
+    void Reset();
+    float CalculateItem(uint32 itemId);
+    float CalculateEnchant(uint32 enchantId);
+
+private:
+    void GenerateWeights(Player* player);
+    void GenerateBasicWeights(Player* player);
+    void GenerateAdditionalWeights(Player* player);
+
+    void CalculateItemSetBonus(Player* player, ItemTemplate const* proto);
+    void CalculateSocketBonus(Player* player, ItemTemplate const* proto);
+
+    void CalculateItemTypePenalty(ItemTemplate const* proto);
+
+    bool NotBestArmorType(uint32 item_subclass_armor);
+
+    void ApplyOverflowPenalty(Player* player);
+
+private:
+    Player* player_;
+    CollectorType type_;
+    std::unique_ptr<StatsCollector> collector_;
+    uint8 cls;
+    int tab;
+    bool enable_overflow_penalty_;
+    bool enable_item_set_bonus_;
+
+    float weight_;
+    float stats_weights_[STATS_TYPE_MAX];
+};
+
+#endif