using System.Collections.Generic;
using GeometryTD.CustomEvent;
using GeometryTD.DataTable;
using UnityGameFramework.Runtime;

namespace GeometryTD.CustomComponent
{
    internal sealed class CombatRunningPhaseState : CombatStateBase
    {
        private readonly DRLevelPhase _phase;
        private readonly IReadOnlyList<DRLevelSpawnEntry> _spawnEntries;

        public CombatRunningPhaseState(
            CombatSchedulerRuntime runtime,
            CombatSchedulerCoordinator coordinator,
            DRLevelPhase phase,
            IReadOnlyList<DRLevelSpawnEntry> spawnEntries) : base(runtime, coordinator)
        {
            _phase = phase;
            _spawnEntries = spawnEntries;
        }

        public override void OnEnter()
        {
            Runtime.EnemyManager.BeginPhase(_phase, _spawnEntries);
            GameEntry.Event.Fire(
                Coordinator,
                CombatProcessEventArgs.Create(
                    Runtime.PhaseLoopRuntime.DisplayPhaseIndex,
                    Runtime.PhaseLoopRuntime.PhaseCount));
            GameEntry.Event.Fire(
                Coordinator,
                CombatEnemyHpRateChangedEventArgs.Create(
                    Coordinator.ResolveEnemyHpRateMultiplier(
                        Runtime.PhaseLoopRuntime.DisplayPhaseIndex,
                        Runtime.PhaseLoopRuntime.PhaseCount)));

            if (!Runtime.NodeEnterFired)
            {
                Runtime.NodeEnterFired = true;
                GameEntry.Event.Fire(
                    Coordinator,
                    NodeEnterEventArgs.Create(
                        Runtime.RunId,
                        Runtime.NodeId,
                        Runtime.NodeType,
                        Runtime.SequenceIndex));
            }

            Log.Info(
                "CombatScheduler phase started. Level={0}, Phase={1}, EndType={2}, Entries={3}.",
                Runtime.CurrentLevel != null ? Runtime.CurrentLevel.Id : 0,
                Runtime.PhaseLoopRuntime.DisplayPhaseIndex,
                _phase.EndType,
                _spawnEntries != null ? _spawnEntries.Count : 0);
        }

        public override void OnUpdate(float elapseSeconds, float realElapseSeconds)
        {
            if (Runtime.PhaseLoopRuntime.CurrentPhase == null)
            {
                Coordinator.EnterFailureFallback("CombatScheduler update failed. Current phase is null.");
                return;
            }

            Runtime.PhaseLoopRuntime.AdvancePhaseElapsed(elapseSeconds);
            Runtime.EnemyManager.OnUpdate(elapseSeconds, realElapseSeconds);

            if (Coordinator.ShouldEnterSettlementFromActiveState(out bool isVictory))
            {
                Coordinator.ChangeState(new CombatSettlementState(Runtime, Coordinator, isVictory));
                return;
            }

            if (Runtime.EnemyManager.IsPhaseSpawnCompleted)
            {
                Coordinator.EnterWaitingForPhaseEnd();
            }
        }
    }
}