using GeometryTD.CustomEvent;
using GeometryTD.Definition;
using GeometryTD.Procedure;
using GameFramework.Event;
using UnityEngine;
using UnityGameFramework.Runtime;

namespace GeometryTD.UI
{
    public sealed class NodeMapFormController : UIFormControllerCommonBase<NodeMapFormContext, NodeMapForm>
    {
        private NodeMapFormUseCase _useCase;

        protected override UIFormType UIFormTypeId => UIFormType.NodeMapForm;

        protected override void RefreshUI(NodeMapForm form, NodeMapFormContext context)
        {
            form.RefreshUI(context);
        }

        protected override void SubscribeCustomEvents()
        {
            GameEntry.Event.Subscribe(NodeMapNodeClickEventArgs.EventId, OnNodeClicked);
        }

        protected override void UnsubscribeCustomEvents()
        {
            GameEntry.Event.Unsubscribe(NodeMapNodeClickEventArgs.EventId, OnNodeClicked);
        }

        public override int? OpenUI(object userData = null)
        {
            if (userData is NodeMapFormContext context)
            {
                return OpenUIInternal(context);
            }

            if (userData is NodeMapFormRawData rawDataFromUserData)
            {
                return OpenUI(rawDataFromUserData);
            }

            if (userData != null)
            {
                Log.Warning("NodeMapFormController.OpenUI() userData type is invalid.");
                return null;
            }

            if (_useCase == null)
            {
                Log.Error("NodeMapFormController.OpenUI() useCase is null.");
                return null;
            }

            return OpenUI(_useCase.CreateInitialModel());
        }

        public int? OpenUI(NodeMapFormRawData rawData)
        {
            return OpenUIInternal(BuildContext(rawData));
        }

        public override void BindUseCase(IUIUseCase useCase)
        {
            if (!(useCase is NodeMapFormUseCase nodeMapFormUseCase))
            {
                Log.Error("NodeMapFormController.BindUseCase() useCase is invalid.");
                return;
            }

            _useCase = nodeMapFormUseCase;
        }

        private void OnNodeClicked(object sender, GameEventArgs e)
        {
            if (!IsEventFromCurrentForm(sender) || !(e is NodeMapNodeClickEventArgs args) || _useCase == null)
            {
                return;
            }

            if (!_useCase.TryRequestEnterNode(args.SequenceIndex, out NodeMapNodeRawData selectedNode, out NodeMapFormRawData latestRawData))
            {
                if (latestRawData != null)
                {
                    SetContext(BuildContext(latestRawData));
                    RefreshCurrentUI();
                }

                return;
            }

            if (latestRawData != null)
            {
                SetContext(BuildContext(latestRawData));
                RefreshCurrentUI();
            }

            if (Form != null && selectedNode != null)
            {
                GameEntry.Event.Fire(Form, NodeMapNodeEnterRequestedEventArgs.Create(
                    selectedNode.RunId,
                    selectedNode.NodeId,
                    selectedNode.NodeType,
                    selectedNode.SequenceIndex));
            }
        }

        private bool IsEventFromCurrentForm(object sender)
        {
            if (Form == null)
            {
                return false;
            }

            if (ReferenceEquals(sender, Form))
            {
                return true;
            }

            if (sender is Component component)
            {
                NodeMapForm ownerForm = component.GetComponentInParent<NodeMapForm>();
                return ownerForm == Form;
            }

            return false;
        }

        private static NodeMapFormContext BuildContext(NodeMapFormRawData rawData)
        {
            NodeItemContext[] nodeItemContexts = System.Array.Empty<NodeItemContext>();
            if (rawData?.Nodes != null && rawData.Nodes.Count > 0)
            {
                nodeItemContexts = new NodeItemContext[rawData.Nodes.Count];
                for (int i = 0; i < rawData.Nodes.Count; i++)
                {
                    NodeMapNodeRawData node = rawData.Nodes[i];
                    nodeItemContexts[i] = new NodeItemContext
                    {
                        NodeId = node?.NodeId ?? 0,
                        SequenceIndex = node?.SequenceIndex ?? i,
                        NodeType = node?.NodeType ?? RunNodeType.None,
                        IsLocked = node != null && node.Status == RunNodeStatus.Locked,
                        IsCurrent = node != null && node.IsCurrentNode,
                        IsCompleted = node != null && node.Status == RunNodeStatus.Completed,
                        IsFailed = node != null && node.Status == RunNodeStatus.Failed,
                        CanClick = node != null && node.CanEnter
                    };
                }
            }

            return new NodeMapFormContext
            {
                Title = rawData?.Title ?? "节点地图",
                ProgressText = rawData?.ProgressText ?? "0 / 0",
                CurrentNodeText = rawData?.CurrentNodeText ?? "当前节点: 无",
                IsRunCompleted = rawData != null && rawData.IsRunCompleted,
                NodeItems = nodeItemContexts
            };
        }
    }
}