using System.Collections.Generic;
using CoreGame.Render;
using Entitas;
using Entitas.CodeGeneration.Attributes;

public partial class CombatEntity
{
    public void AddFaction(Faction newFaction, SelectUseType newSelectUseType)
    {
        var index = CombatComponentsLookup.Faction;
        var component =
            (FactionComponent)CreateComponent(index, typeof(FactionComponent));
        component.faction = newFaction;
        component.selectUseType = newSelectUseType;
        component.commonBeQueryParam = new QueryParam(newFaction, newSelectUseType);
        if (newFaction == Faction.Player)
            component.opposite = Faction.Enemy;
        else if (newFaction == Faction.Enemy)
            component.opposite = Faction.Player;
        AddComponent(index, component);
    }
    
    public void AddFaction(Faction newFaction, SelectUseType newSelectUseType, Faction newOpposite)
    {
        var index = CombatComponentsLookup.Faction;
        var component =
            (FactionComponent)CreateComponent(index, typeof(FactionComponent));
        component.faction = newFaction;
        component.selectUseType = newSelectUseType;
        component.commonBeQueryParam = new QueryParam(newFaction, newSelectUseType);
        component.opposite = newOpposite;
        AddComponent(index, component);
    }
}

namespace CoreGame.Render
{
    // 暂时不考虑多阵营
    public enum Faction
    {
        None = 0,
        Player = 1,
        Enemy = 2,
        Npc = 3,
    }
    
    public enum SelectUseType
    {
        None = 0,
        Actor = 1, // 角色
        Summon = 2, // 召唤物
        Zone = 3, // 暴风雪，火墙等区域技能
        Bullet = 4,
        Obstacle = 5,
        Suppressor = 6,
        Max,
    }
    
    public class QueryParamEqualityComparer : IEqualityComparer<QueryParam>
    {
        public bool Equals(QueryParam x, QueryParam y)
        {
            return x == y;
        }

        public int GetHashCode(QueryParam obj)
        {
            return obj.GetHashCode();
        }
    }
    
    public struct QueryParam
    {
        public Faction faction;
        public SelectUseType selectUseType;
        
        public QueryParam(Faction faction, SelectUseType selectUseType)
        {
            this.faction = faction;
            this.selectUseType = selectUseType;
        }
        
        public static bool operator ==(QueryParam a, QueryParam b)
        {
            return a.faction == b.faction && a.selectUseType == b.selectUseType;
        }

        public static bool operator !=(QueryParam a, QueryParam b)
        {
            return !(a == b);
        }

        public override int GetHashCode()
        {
            return (int)faction * 100 + (int)selectUseType;
        }
    }
    
    [Combat]
    public class FactionComponent : IComponent
    {
        [EntityIndex] // 阵营
        public Faction faction;
        [EntityIndex] // 筛选类型
        public SelectUseType selectUseType;
        // [EntityIndex] // 目标筛选用的
        public QueryParam commonBeQueryParam;
        public Faction opposite;
    }
}