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(
            CombatSchedulerRuntimeContext context,
            CombatSchedulerFlowCoordinator flow,
            DRLevelPhase phase,
            IReadOnlyList<DRLevelSpawnEntry> spawnEntries) : base(context, flow)
        {
            _phase = phase;
            _spawnEntries = spawnEntries;
        }

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

            if (!Context.NodeEnterFired)
            {
                Context.NodeEnterFired = true;
                GameEntry.Event.Fire(Flow, NodeEnterEventArgs.Create());
            }

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

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

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

            if (Flow.ShouldEnterSettlementFromActiveState(out string reason, out bool isVictory))
            {
                Flow.ChangeState(new CombatSettlementState(Context, Flow, reason, isVictory));
                return;
            }

            if (Context.EnemyManager.IsPhaseSpawnCompleted)
            {
                Flow.EnterWaitingForPhaseEnd();
            }
        }
    }
}