using System.Collections.Generic;
using System.Linq;
using Continentis.MainGame.Card;
using Continentis.MainGame.Combat;
using NaughtyAttributes;
using UnityEngine;

namespace Continentis.MainGame.Character
{
    public enum Fraction
    {
        Player,
        Ally,
        Enemy,
        Neutral
    }

    public interface ICardOwner
    {
        DeckSubmodule deckSubmodule { get; }
    }
    
    public partial class CharacterBase : ICardOwner
    {
        public CharacterData data;
        
        public Fraction fraction;
        public CombatTeam team;
        
        public int actionCountThisRound;
        
        [ShowNativeProperty]
        public AttributeSubmodule attributeSubmodule { get; private set; }
        
        [ShowNativeProperty]
        public EventSubmodule eventSubmodule { get; private set; }
        
        [ShowNativeProperty]
        public EquipmentSubmodule equipmentSubmodule { get; private set; }
        
        [ShowNativeProperty]
        public DeckSubmodule deckSubmodule { get; private set; }
        
        [ShowNativeProperty]
        public IntentionSubmodule intentionSubmodule { get; private set; }
        
        [ShowNativeProperty]
        public StatusSubmodule statusSubmodule { get; private set; }
        
        [ShowNativeProperty]
        public CombatBuffSubmodule combatBuffSubmodule { get; private set; }

        public void Initialize(Fraction fraction)
        {
            this.fraction = fraction;
            
            switch (fraction)
            {
                case Fraction.Player:
                    this.team = CombatMainManager.Instance.characterController.playerTeam;
                    break;
                case Fraction.Enemy:
                    this.team = CombatMainManager.Instance.characterController.enemyTeam;
                    break;
                default:
                    this.team = null;
                    break;
            }

            attributeSubmodule = new AttributeSubmodule(this);
            equipmentSubmodule = new EquipmentSubmodule(this);
            eventSubmodule = new EventSubmodule(this);
            deckSubmodule = new DeckSubmodule(this);
            intentionSubmodule = new IntentionSubmodule(this);
            statusSubmodule = new StatusSubmodule(this);
            combatBuffSubmodule = new CombatBuffSubmodule(this);
        }
    }

    public partial class CharacterBase
    {
        public CombatCharacterViewBase characterView;
    }

    public partial class CharacterBase
    {
        public virtual void GetIntendedCards()
        {
            bool CanAfford(CardInstance card, int stamina, int mana)
            {
                return card.cardLogic.GetAttribute("StaminaCost") <= stamina &&
                       card.cardLogic.GetAttribute("ManaCost") <= mana;
            }

            bool CheckAvailabilityAndSetTargets(CardInstance card, out List<CharacterBase> targets)
            {
                card.cardLogic.DetectTargetsValidity(out List<CharacterBase> valid, out _, out _);
                if (valid.Count == 0 || !card.cardLogic.CheckBeforePlay())
                {
                    targets = null;
                    return false; // 无有效目标或无法使用则跳过
                }
                    
                targets = card.cardLogic.SetRandomTargets(valid);
                
                return true;
            }
            
            IntentionBase currentIntention = intentionSubmodule.currentIntention;
            List<CardInstance> availableCards = deckSubmodule.PoolPile;
            List<IntendedCard> intended = new List<IntendedCard>();
            int currentStamina = GetAttribute("Stamina");
            int remainingStamina = currentStamina - currentIntention.guaranteedStamina;
            int currentMana = GetAttribute("Mana");
            int remainingMana = currentMana - currentIntention.guaranteedMana;

            List<CardInstance> forced = new List<CardInstance>();
            List<CardInstance> normal = new List<CardInstance>();

            foreach (CardInstance card in availableCards)
            {
                if (card.cardLogic.weightSubmodule.forceUse)
                {
                    forced.Add(card);
                }
                else
                {
                    normal.Add(card);
                }
            }
            
            intentionSubmodule.intendedCards.Clear();
            //(characterView.hudContainer.enablingHUDs["Intention"] as Intention)?.Clear();
            
            // 1. 优先处理强制选择卡牌
            foreach (CardInstance card in forced)
            {
                if (currentIntention.maxCardCount > 0 && intended.Count >= currentIntention.maxCardCount)
                {
                    break; // 已达数量上限
                }

                if (CanAfford(card, remainingStamina, remainingMana))
                {
                    if(!CheckAvailabilityAndSetTargets(card, out List<CharacterBase> targets))
                    {
                        continue; // 无有效目标或无法使用则跳过
                    }
                    
                    intended.Add(new IntendedCard(card, targets));
                    remainingStamina -= card.cardLogic.GetAttribute("StaminaCost");
                    remainingMana -= card.cardLogic.GetAttribute("ManaCost");
                }
                // 行动力不足则跳过该卡
            }
            
            // 2. 在剩余普通卡牌中基于权重随机选取
            while (intended.Count < currentIntention.maxCardCount)
            {
                // 筛选出当前资源下还能出的牌
                List<CardInstance> affordableCards = normal.FindAll(card => CanAfford(card, remainingStamina, remainingMana));
                
                if (affordableCards.Count == 0)
                {
                    break;
                }
                
                float totalWeight = affordableCards.Sum(card => card.cardLogic.weightSubmodule.currentWeight);
                if (totalWeight <= 0f) break;
                
                float r = Random.value * totalWeight;
                float accum = 0f;
                CardInstance chosen = null;
                foreach (CardInstance card in affordableCards)
                {
                    accum += card.cardLogic.weightSubmodule.currentWeight;
                    if (r <= accum)
                    {
                        chosen = card;
                        break;
                    }
                }
                
                if (chosen != null)
                {
                    if (!CheckAvailabilityAndSetTargets(chosen, out List<CharacterBase> targets))
                    {
                        normal.Remove(chosen);
                        continue; // 无有效目标或无法使用则跳过
                    }

                    intended.Add(new IntendedCard(chosen, targets));
                    normal.Remove(chosen);
                    remainingStamina -= chosen.cardLogic.GetAttribute("StaminaCost");
                    remainingMana -= chosen.cardLogic.GetAttribute("ManaCost");
                }
            }
            
            intentionSubmodule.intendedCards.AddRange(intended);
        }
    }
    
    public partial class CharacterBase
    {
        public CombatCharacterViewBase GenerateCharacterView(Vector3 position)
        {
            GameObject prefab = data.combatCharacterView;
            CombatCharacterViewBase characterView = Object.Instantiate(prefab, position, Quaternion.identity).GetComponent<CombatCharacterViewBase>();
            characterView.InitializeAnimations();
            characterView.character = this;
            this.characterView = characterView;
            return characterView;
        }
    }
}