using System.Collections.Generic;
using GeometryTD.Definition;
using GeometryTD.Entity.EntityData;
using UnityEngine;

namespace GeometryTD.CustomComponent
{
    public partial class CombatScheduler
    {
        private sealed class CombatLoadingState : CombatStateBase
        {
            public CombatLoadingState(CombatScheduler scheduler) : base(scheduler)
            {
            }

            public override void OnEnter()
            {
                if (Scheduler._currentLevel == null)
                {
                    Scheduler.EnterFailureFallback("Combat loading failed. Current level is null.");
                    return;
                }

                MapData mapData = BuildMapData();
                if (!Scheduler._loadSession.StartLoading(Scheduler._currentLevel, mapData, out string errorMessage))
                {
                    Scheduler.EnterFailureFallback($"Combat loading failed. {errorMessage}");
                }
            }

            public override void OnUpdate(float elapseSeconds, float realElapseSeconds)
            {
                _ = elapseSeconds;
                _ = realElapseSeconds;

                if (!Scheduler._loadSession.IsReady)
                {
                    return;
                }

                Scheduler.TryBeginNextPhase();
            }

            private MapData BuildMapData()
            {
                List<TowerStatsData> buildTowerStatsSnapshot = new();
                for (int i = 0; i < Scheduler._combatInRunResourceManager.CurrentBuildTowerCount; i++)
                {
                    if (Scheduler._combatInRunResourceManager.TryGetBuildTowerStats(i, out TowerStatsData stats) &&
                        stats != null)
                    {
                        buildTowerStatsSnapshot.Add(stats);
                    }
                }

                return new MapData(
                    entityId: 0,
                    typeId: 0,
                    levelId: Scheduler._currentLevel.Id,
                    position: Vector3.zero,
                    initialCoin: Scheduler._combatInRunResourceManager.CurrentCoin,
                    buildTowerStatsSnapshot: buildTowerStatsSnapshot,
                    tryConsumeCoin: Scheduler.TryConsumeCoin,
                    addCoin: Scheduler.AddCoin);
            }
        }
    }
}