using System.Collections.Generic;
using GeometryTD.CustomEvent;
using GeometryTD.DataTable;
using GeometryTD.Definition;
using GeometryTD.Procedure;
using GeometryTD.UI;
using UnityEngine;
using UnityGameFramework.Runtime;

namespace GeometryTD.CustomComponent
{
    internal sealed class CombatSchedulerCoordinator
    {
        private readonly ICombatSchedulerPort _schedulerPort;
        private readonly CombatSchedulerRuntime _runtime;
        public ICombatSchedulerPort Port => _schedulerPort;

        public CombatSchedulerCoordinator(ICombatSchedulerPort schedulerPort, CombatSchedulerRuntime runtime)
        {
            _schedulerPort = schedulerPort;
            _runtime = runtime;
        }

        public void ChangeState(CombatStateBase nextState)
        {
            _schedulerPort.ChangeState(nextState);
        }

        public int ResolveEnemyHpRateMultiplier(int displayPhaseIndex, int phaseCount)
        {
            if (displayPhaseIndex <= 0 || phaseCount <= 0)
            {
                return 1;
            }

            int completedLoopCount = Mathf.Max(0, (displayPhaseIndex - 1) / phaseCount);
            if (completedLoopCount >= 30)
            {
                return int.MaxValue;
            }

            return 1 << completedLoopCount;
        }

        public void ResetRuntime()
        {
            _runtime.CurrentState = null;
            _runtime.PhaseBuffer.Clear();
            _runtime.SpawnEntriesByPhaseId.Clear();
            _runtime.PhaseLoopRuntime.Reset();
            _runtime.LoadSession.Reset();
            _runtime.CombatRunResourceStore.Reset();
            _runtime.SettlementContext = null;
            _runtime.CurrentLevel = null;
            _runtime.DidCombatWin = true;
            _runtime.IsCompleted = false;
            _runtime.NodeEnterFired = false;
            _runtime.NodeContext = null;
            _runtime.NextDropOrdinal = 0;
            _runtime.NextRewardOrdinal = 0;
        }

        public void CleanupAllCombatEntities()
        {
            _runtime.LoadSession.Cleanup();
            _runtime.EnemyManager.CleanupTrackedEnemies();
        }

        public void EnsureCombatFinishFormUseCaseBound()
        {
            _runtime.CombatFinishFormUseCase ??= new CombatFinishFormUseCase(_schedulerPort);
            GameEntry.UIRouter.BindUIUseCase(UIFormType.CombatFinishForm, _runtime.CombatFinishFormUseCase);
        }

        public void EnsureRewardSelectFormUseCaseBound()
        {
            _runtime.RewardSelectFormUseCase ??= new RewardSelectFormUseCase();
            GameEntry.UIRouter.BindUIUseCase(UIFormType.RewardSelectForm, _runtime.RewardSelectFormUseCase);
        }

        public void OpenCombatFailureDialog(string errorMessage)
        {
            CloseDialogForm();
            GameEntry.UIRouter.OpenUI(UIFormType.DialogForm, new DialogFormRawData
            {
                Mode = 1,
                Title = "Combat Error",
                Message = string.IsNullOrWhiteSpace(errorMessage) ? "Combat failed unexpectedly." : errorMessage,
                PauseGame = false,
                ConfirmText = "Return Menu",
                OnClickConfirm = OnCombatFailureDialogConfirmed
            });
        }

        public bool TryBeginNextPhase()
        {
            if (!_runtime.PhaseLoopRuntime.TryEnterNextPhase(out DRLevelPhase nextPhase))
            {
                _schedulerPort.ChangeState(new CombatSettlementState(_runtime, this, true));
                return false;
            }

            _runtime.SpawnEntriesByPhaseId.TryGetValue(nextPhase.Id, out IReadOnlyList<DRLevelSpawnEntry> spawnEntries);
            _schedulerPort.ChangeState(new CombatRunningPhaseState(_runtime, this, nextPhase, spawnEntries));
            return true;
        }

        public void EnterWaitingForPhaseEnd()
        {
            _schedulerPort.ChangeState(new CombatWaitingForPhaseEndState(_runtime, this));
        }

        public void CompleteCurrentPhase()
        {
            _runtime.EnemyManager.EndPhase();
            Log.Info(
                "CombatScheduler phase completed. Level={0}, Phase={1}, Elapsed={2:F2}s.",
                _runtime.CurrentLevel != null ? _runtime.CurrentLevel.Id : 0,
                _runtime.PhaseLoopRuntime.CurrentPhase != null ? _runtime.PhaseLoopRuntime.CurrentPhase.Id : 0,
                _runtime.PhaseLoopRuntime.CurrentPhaseElapsed);

            TryBeginNextPhase();
        }

        public bool ShouldEnterSettlementFromActiveState(out bool didCombatWin)
        {
            if (GetCurrentBaseHp() <= 0)
            {
                didCombatWin = false;
                return true;
            }

            if (_runtime.PhaseLoopRuntime.IsEndCombatRequested)
            {
                didCombatWin = true;
                return true;
            }

            didCombatWin = true;
            return false;
        }

        public void OnFullBaseHpRewardSelected(RewardSelectItemRawData selectedReward)
        {
            if (_runtime.CurrentState is not CombatRewardSelectionState || _runtime.SettlementContext == null)
            {
                return;
            }

            _runtime.CombatSettlementService.ApplySelectedReward(_runtime.SettlementContext, selectedReward);
            _schedulerPort.ChangeState(new CombatFinishFormState(_runtime, this));
        }

        public void OnFullBaseHpRewardGiveUp()
        {
            if (_runtime.CurrentState is not CombatRewardSelectionState || _runtime.SettlementContext == null)
            {
                return;
            }

            _schedulerPort.ChangeState(new CombatFinishFormState(_runtime, this));
        }

        public LevelThemeType ResolveCurrentThemeType()
        {
            if (_runtime.CurrentLevel != null)
            {
                return _runtime.CurrentLevel.LevelThemeType;
            }

            return LevelThemeType.None;
        }

        public int ApplyBaseDamage(int damage)
        {
            return _runtime.CombatRunResourceStore.ApplyBaseDamage(damage);
        }

        public int GetCurrentBaseHp()
        {
            return Mathf.Max(0, _runtime.CombatRunResourceStore.CurrentBaseHp);
        }

        public void CloseCombatFinishForm()
        {
            GameEntry.UIRouter.CloseUI(UIFormType.CombatFinishForm);
        }

        public void CloseRewardSelectForm()
        {
            GameEntry.UIRouter.CloseUI(UIFormType.RewardSelectForm);
        }

        public void CloseDialogForm()
        {
            GameEntry.UIRouter.CloseUI(UIFormType.DialogForm);
        }

        public void CompleteNormalCombatAndNotify(bool didCombatWin)
        {
            CompleteCombat(didCombatWin);
            RunNodeExecutionContext nodeContext = _runtime.NodeContext;
            GameEntry.Event.Fire(
                this,
                NodeCompleteEventArgs.Create(
                    nodeContext?.RunId,
                    nodeContext?.NodeId ?? 0,
                    nodeContext?.NodeType ?? RunNodeType.None,
                    nodeContext?.SequenceIndex ?? -1,
                    RunNodeCompletionStatus.Completed,
                    didCombatWin,
                    nodeContext != null
                        ? nodeContext.CreateCompletionSnapshot(
                            GameEntry.PlayerInventory != null ? GameEntry.PlayerInventory.GetInventorySnapshot() : null)
                        : null));
        }

        public void CompleteFailureCombatAndNotify()
        {
            CleanupAllCombatEntities();
            CloseCombatFinishForm();
            CloseRewardSelectForm();
            CloseDialogForm();
            CompleteCombat(false);
            RunNodeExecutionContext nodeContext = _runtime.NodeContext;
            GameEntry.Event.Fire(
                this,
                NodeCompleteEventArgs.Create(
                    nodeContext?.RunId,
                    nodeContext?.NodeId ?? 0,
                    nodeContext?.NodeType ?? RunNodeType.None,
                    nodeContext?.SequenceIndex ?? -1,
                    RunNodeCompletionStatus.Exception,
                    false,
                    nodeContext != null
                        ? nodeContext.CreateCompletionSnapshot(
                            GameEntry.PlayerInventory != null ? GameEntry.PlayerInventory.GetInventorySnapshot() : null)
                        : null));
        }

        public bool HandleStartFailure(string errorMessage)
        {
            Log.Warning("{0}", errorMessage);
            _runtime.EnemyManager.EndPhase();
            CleanupAllCombatEntities();
            CloseCombatFinishForm();
            CloseRewardSelectForm();
            CloseDialogForm();
            ResetRuntime();
            return false;
        }

        public void EnterFailureFallback(string errorMessage)
        {
            if (_runtime.CurrentState is CombatFailedState || _runtime.IsCompleted)
            {
                return;
            }

            _schedulerPort.ChangeState(new CombatFailedState(_runtime, this, errorMessage));
        }

        public void OnCombatFailureDialogConfirmed(object userData)
        {
            _ = userData;
            if (_runtime.CurrentState is not CombatFailedState || _runtime.IsCompleted)
            {
                return;
            }

            CompleteFailureCombatAndNotify();
        }

        private void CompleteCombat(bool succeeded)
        {
            _runtime.IsCompleted = true;
            _runtime.CurrentState = null;
            _runtime.CombatRunResourceStore.MarkCombatEnded();
            _runtime.CombatEndedCallback?.Invoke(succeeded);
        }
    }
}