using GameFramework.Event;
using GameFramework.Fsm;
using GameFramework.Procedure;
using GeometryTD.CustomEvent;
using GeometryTD.Definition;
using GeometryTD.UI;
using UnityGameFramework.Runtime;

namespace GeometryTD.Procedure
{
    public class ProcedureMain : ProcedureBase
    {
        public override bool UseNativeDialog => false;

        private RepoFormUseCase _repoFormUseCase;
        private NodeMapFormUseCase _nodeMapFormUseCase;
        private RunState _currentRunState;

        #region FSM

        protected override void OnEnter(IFsm<IProcedureManager> procedureOwner)
        {
            base.OnEnter(procedureOwner);

            GameEntry.Event.Subscribe(CombatFailureReturnEventArgs.EventId, OnCombatFailureReturn);
            GameEntry.Event.Subscribe(NodeCompleteEventArgs.EventId, OnNodeComplete);
            GameEntry.Event.Subscribe(NodeEnterEventArgs.EventId, OnNodeEnter);
            GameEntry.Event.Subscribe(NodeMapNodeEnterRequestedEventArgs.EventId, OnNodeMapNodeEnterRequested);

            GameEntry.EventNode.OnInit();
            GameEntry.CombatNode.OnInit(LevelThemeType.Plain);
            GameEntry.ShopNode.OnInit();
            GameEntry.PlayerInventory?.OnInit();

            _currentRunState = RunStateFactory.CreateFixedRun(
                LevelThemeType.Plain,
                GameEntry.PlayerInventory != null
                    ? GameEntry.PlayerInventory.GetInventorySnapshot()
                    : null);

            _repoFormUseCase = new RepoFormUseCase();
            GameEntry.UIRouter.BindUIUseCase(UIFormType.RepoForm, _repoFormUseCase);

            _nodeMapFormUseCase = new NodeMapFormUseCase();
            _nodeMapFormUseCase.SetRunState(_currentRunState);
            GameEntry.UIRouter.BindUIUseCase(UIFormType.NodeMapForm, _nodeMapFormUseCase);

            OpenHubUI();
        }

        protected override void OnUpdate(IFsm<IProcedureManager> procedureOwner, float elapseSeconds,
            float realElapseSeconds)
        {
            base.OnUpdate(procedureOwner, elapseSeconds, realElapseSeconds);

            GameEntry.CombatNode.OnUpdate(elapseSeconds, realElapseSeconds);
        }

        protected override void OnLeave(IFsm<IProcedureManager> procedureOwner, bool isShutdown)
        {
            GameEntry.CombatNode.OnShutdown();
            GameEntry.Event.Unsubscribe(NodeMapNodeEnterRequestedEventArgs.EventId, OnNodeMapNodeEnterRequested);
            GameEntry.Event.Unsubscribe(CombatFailureReturnEventArgs.EventId, OnCombatFailureReturn);
            GameEntry.Event.Unsubscribe(NodeEnterEventArgs.EventId, OnNodeEnter);
            GameEntry.Event.Unsubscribe(NodeCompleteEventArgs.EventId, OnNodeComplete);
            GameEntry.UIRouter.CloseUI(UIFormType.RepoForm);
            GameEntry.UIRouter.CloseUI(UIFormType.NodeMapForm);
            GameEntry.UIRouter.CloseUI(UIFormType.MainForm);
            _repoFormUseCase = null;
            _nodeMapFormUseCase = null;
            _currentRunState = null;

            base.OnLeave(procedureOwner, isShutdown);
        }

        #endregion


        private void OnNodeEnter(object sender, GameEventArgs e)
        {
            if (!(e is NodeEnterEventArgs args))
            {
                return;
            }

            if (!string.IsNullOrWhiteSpace(args.RunId) &&
                _currentRunState != null &&
                !string.Equals(args.RunId, _currentRunState.RunId))
            {
                Log.Warning(
                    "ProcedureMain.OnNodeEnter() ignored. EventRunId={0}, CurrentRunId={1}.",
                    args.RunId,
                    _currentRunState.RunId);
                return;
            }

            RunNodeState currentNode = _currentRunState?.CurrentNode;
            if (currentNode != null &&
                ((args.NodeId > 0 && args.NodeId != currentNode.NodeId) ||
                 (args.NodeType != RunNodeType.None && args.NodeType != currentNode.NodeType) ||
                 (args.SequenceIndex >= 0 && args.SequenceIndex != currentNode.SequenceIndex)))
            {
                Log.Warning(
                    "ProcedureMain.OnNodeEnter() node mismatch. EventNodeId={0}, EventNodeType={1}, EventSequenceIndex={2}; CurrentNodeId={3}, CurrentNodeType={4}, CurrentSequenceIndex={5}.",
                    args.NodeId,
                    args.NodeType,
                    args.SequenceIndex,
                    currentNode.NodeId,
                    currentNode.NodeType,
                    currentNode.SequenceIndex);
            }

            Log.Info(
                "ProcedureMain.OnNodeEnter() accepted. RunId={0}, NodeId={1}, NodeType={2}, SequenceIndex={3}.",
                string.IsNullOrWhiteSpace(args.RunId) ? _currentRunState?.RunId : args.RunId,
                args.NodeId,
                args.NodeType,
                args.SequenceIndex);

            GameEntry.UIRouter.CloseUI(UIFormType.NodeMapForm);
            GameEntry.UIRouter.CloseUI(UIFormType.MainForm);
        }

        private void OnNodeComplete(object sender, GameEventArgs e)
        {
            if (!(e is NodeCompleteEventArgs args))
            {
                return;
            }

            if (!string.IsNullOrWhiteSpace(args.RunId) &&
                _currentRunState != null &&
                !string.Equals(args.RunId, _currentRunState.RunId))
            {
                Log.Warning(
                    "ProcedureMain.OnNodeComplete() ignored. EventRunId={0}, CurrentRunId={1}.",
                    args.RunId,
                    _currentRunState.RunId);
                return;
            }

            BackpackInventoryData snapshot = args.InventorySnapshotAfterNode;
            if (snapshot == null && GameEntry.PlayerInventory != null)
            {
                snapshot = GameEntry.PlayerInventory.GetInventorySnapshot();
            }

            AdvanceRunState(args.Succeeded, snapshot);
            OpenHubUI();
        }

        private void OnCombatFailureReturn(object sender, GameEventArgs e)
        {
            if (!(e is CombatFailureReturnEventArgs))
            {
                return;
            }

            BackpackInventoryData snapshot = GameEntry.PlayerInventory != null
                ? GameEntry.PlayerInventory.GetInventorySnapshot()
                : null;
            AdvanceRunState(false, snapshot);
            OpenHubUI();
        }

        private void OnNodeMapNodeEnterRequested(object sender, GameEventArgs e)
        {
            if (!(sender is NodeMapForm) || !(e is NodeMapNodeEnterRequestedEventArgs args))
            {
                return;
            }

            RunNodeState currentNode = _currentRunState?.CurrentNode;
            if (_currentRunState == null || !_currentRunState.CanEnterCurrentNode || currentNode == null)
            {
                Log.Warning("ProcedureMain.OnNodeMapNodeEnterRequested() ignored. Current run has no enterable node.");
                return;
            }

            if (args.SequenceIndex != currentNode.SequenceIndex || args.NodeType != currentNode.NodeType)
            {
                Log.Warning(
                    "ProcedureMain.OnNodeMapNodeEnterRequested() ignored. Requested={0}#{1}, CurrentNode={2}#{3}.",
                    args.NodeType,
                    args.SequenceIndex,
                    currentNode.NodeType,
                    currentNode.SequenceIndex);
                return;
            }

            switch (currentNode.NodeType)
            {
                case RunNodeType.Combat:
                case RunNodeType.BossCombat:
                    if (!HasAvailableParticipantTower())
                    {
                        Log.Warning("ProcedureMain blocked combat start. No participant tower is available.");
                        return;
                    }

                    GameEntry.CombatNode.StartCombat(
                        currentNode.LinkedLevelId,
                        _currentRunState.RunId,
                        currentNode.NodeId,
                        currentNode.NodeType,
                        currentNode.SequenceIndex);
                    return;
                case RunNodeType.Event:
                    GameEntry.EventNode.StartEvent(
                        _currentRunState.RunId,
                        currentNode.NodeId,
                        currentNode.NodeType,
                        currentNode.SequenceIndex);
                    return;
                case RunNodeType.Shop:
                    GameEntry.ShopNode.StartShop(
                        _currentRunState.RunId,
                        currentNode.NodeId,
                        currentNode.NodeType,
                        currentNode.SequenceIndex);
                    return;
                default:
                    Log.Warning("ProcedureMain.OnNodeMapNodeEnterRequested() encountered unsupported node type: {0}.",
                        currentNode.NodeType);
                    return;
            }
        }

        private void AdvanceRunState(bool succeeded, BackpackInventoryData snapshot)
        {
            if (_currentRunState == null)
            {
                return;
            }

            if (!RunStateAdvanceService.TryCompleteCurrentNode(_currentRunState, succeeded, snapshot))
            {
                return;
            }

            if (_currentRunState.IsCompleted)
            {
                Log.Info("ProcedureMain run completed. RunId={0}", _currentRunState.RunId);
                return;
            }

            RunNodeState nextNode = _currentRunState.CurrentNode;
            if (nextNode != null)
            {
                Log.Info(
                    "ProcedureMain advanced run. RunId={0}, NextNodeType={1}, SequenceIndex={2}, LevelId={3}.",
                    _currentRunState.RunId,
                    nextNode.NodeType,
                    nextNode.SequenceIndex,
                    nextNode.LinkedLevelId);
            }
        }

        private static bool HasAvailableParticipantTower()
        {
            return GameEntry.PlayerInventory != null &&
                   GameEntry.PlayerInventory.GetParticipantTowerSnapshot().Count > 0;
        }

        private void OpenHubUI()
        {
            _nodeMapFormUseCase?.SetRunState(_currentRunState);
            GameEntry.UIRouter.OpenUI(UIFormType.NodeMapForm);
            GameEntry.UIRouter.OpenUI(UIFormType.MainForm);
        }
    }
}