using System.Collections.Generic;
using ProjectM.Simulation;
using UnityEngine;

namespace ProjectM.Authoring
{
    /// <summary>
    /// Designer-facing definition of one item (resource, tool, weapon, gear, consumable). Numeric/byte fields
    /// are baked into the ItemDatabase blob (immutable, Burst-fast runtime config). Category and Tier are
    /// BYTES, not enums, to dodge BOTH the MCP enum-drop hazard (manage_* silently drop enum fields when set
    /// via tooling) AND the cross-assembly enum-in-Burst hazard. UI icon/description are deferred to a later
    /// managed lookup keyed by id, exactly like AbilityDefinition.
    /// </summary>
    [CreateAssetMenu(menuName = "Project M/Item Definition", fileName = "Item_")]
    public class ItemDefinition : ScriptableObject
    {
        [Tooltip("Stable item id (ushort range). Keep 1=Aether, 2=Ore, 3=Biomass; reserve >3 for new items; 0 = none.")]
        public int ItemId = 4;

        public string DisplayName = "Item";

        [Tooltip("ItemCategory byte: 0=Resource, 1=Tool, 2=Weapon, 3=Gear, 4=Consumable.")]
        public byte Category = ItemCategory.Resource;

        [Tooltip("Progression tier (0 = base). Higher-tier tools harvest higher-tier nodes / hit harder.")]
        public byte Tier = 0;

        [Min(1)]
        [Tooltip("Max units that stack in one inventory slot (1 for non-stacking equipment).")]
        public int StackMax = 999;

        [Header("Equipment (Phase 1)")]
        [Tooltip("EquipSlotId byte: 0=Weapon, 1=Armor, 2=Trinket, 3=Tool, 255=not equippable.")]
        public byte EquipSlot = 255;

        [Tooltip("AbilityId granted when equipped in the Weapon slot (0=none): 1=Primary, 2=FastLight, 3=SlowHeavy.")]
        public byte GrantedAbilityId = 0;

        [Tooltip("Stat modifiers granted while equipped (first 4 used).")]
        public List<ItemModAuthoring> Mods = new List<ItemModAuthoring>();
    }

    /// <summary>Designer-facing stat-mod grant on an equippable item; the baker writes the first 4 into ItemDefBlob's inline mod slots.</summary>
    [System.Serializable]
    public struct ItemModAuthoring
    {
        [Tooltip("StatTarget byte: 0=Damage,1=CooldownTicks,2=Range,3=ProjectileSpeed,4=AutoTargetRange,5=AutoTargetCone,6=MoveSpeed,7=TurnRate,8=MaxHealth.")]
        public byte Target;
        [Tooltip("ModOp byte: 0=Flat, 1=PercentAdd, 2=PercentMult.")]
        public byte Op;
        public float Value;
    }
}