using System;
using System.Collections.Generic;
using Cysharp.Threading.Tasks;
using Continentis.MainGame.Card;
using Continentis.MainGame.Character;
using DG.Tweening;
using SLSUtilities.General;
using UnityEngine;
using Random = UnityEngine.Random;

namespace Continentis.MainGame.Commands
{
    public class Cmd_ReshuffleDeck : CommandBase
    {
        private readonly DeckSubmodule deck;
        private readonly float interval;

        private const float SingleCardAnimationDuration = 0.5f;

        public Cmd_ReshuffleDeck(DeckSubmodule deck, float interval)
        {
            this.deck = deck;
            this.interval = interval;
        }

        protected override async UniTask ExecuteAsync(CommandContext outerContext)
        {
            var cards = new List<CardInstance>(deck.DiscardPile);
            if (cards.Count == 0) return;

            // 使用 Interval 语义：第一张卡在 t=interval 开始（与旧版 Observable.Interval 一致）
            var tasks = new UniTask[cards.Count];
            for (int i = 0; i < cards.Count; i++)
            {
                CardInstance captured = cards[i];
                tasks[i] = MoveCardWithDelayAsync(captured, (i + 1) * interval);
            }
            await UniTask.WhenAll(tasks);

            deck.DrawPile.Shuffle();
        }

        private async UniTask MoveCardWithDelayAsync(CardInstance card, float delay)
        {
            if (delay > 0f)
                await UniTask.Delay(TimeSpan.FromSeconds(delay));
            await MoveCardToDrawPileAsync(card);
        }

        private async UniTask MoveCardToDrawPileAsync(CardInstance card)
        {
            deck.TransferCard(deck.DiscardPile, deck.DrawPile, card);
            card.handCardView.TransferCardView(CombatUIManager.Instance.combatMainPage.drawPile);

            Vector3 deltaMove = Vector3.zero - card.handCardView.cardTransform.localPosition;
            Vector3 randomLift = new Vector3(Random.Range(-200f, 200f), Random.Range(200f, 600f), 0f);

            card.handCardView.cardOrb.gameObject.SetActive(true);
            card.handCardView.cardTransform
                .DOBlendableLocalMoveBy(deltaMove, SingleCardAnimationDuration)
                .OnComplete(() => card.handCardView.cardOrb.gameObject.SetActive(false)).Play();
            card.handCardView.cardTransform
                .DOBlendableLocalMoveBy(randomLift, SingleCardAnimationDuration * 0.5f)
                .SetLoops(2, LoopType.Yoyo).Play();
            card.handCardView.cardTransform.DOScale(Vector3.zero, SingleCardAnimationDuration).Play();

            await UniTask.Delay(TimeSpan.FromSeconds(SingleCardAnimationDuration));
        }
    }
}