using System;
using GeometryTD.CustomEvent;
using GeometryTD.DataTable;
using GeometryTD.Definition;
using GameFramework.Event;
using GeometryTD.CustomUtility;
using UnityEngine;
using UnityGameFramework.Runtime;

namespace GeometryTD.UI
{
    public class RewardSelectFormController : UIFormControllerCommonBase<RewardSelectFormContext, RewardSelectForm>
    {
        private RewardSelectFormUseCase _useCase;

        protected override UIFormType UIFormTypeId => UIFormType.RewardSelectForm;

        protected override void RefreshUI(RewardSelectForm form, RewardSelectFormContext context)
        {
            form.RefreshUI(context);
        }

        protected override void SubscribeCustomEvents()
        {
            GameEntry.Event.Subscribe(RewardSelectItemSelectedEventArgs.EventId, OnRewardSelected);
            GameEntry.Event.Subscribe(RewardSelectRefreshEventArgs.EventId, OnRefreshClicked);
            GameEntry.Event.Subscribe(RewardSelectGiveUpEventArgs.EventId, OnGiveUpClicked);
        }

        protected override void UnsubscribeCustomEvents()
        {
            GameEntry.Event.Unsubscribe(RewardSelectItemSelectedEventArgs.EventId, OnRewardSelected);
            GameEntry.Event.Unsubscribe(RewardSelectRefreshEventArgs.EventId, OnRefreshClicked);
            GameEntry.Event.Unsubscribe(RewardSelectGiveUpEventArgs.EventId, OnGiveUpClicked);
        }

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

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

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

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

            RewardSelectFormRawData rawData = _useCase.CreateInitialModel();
            return OpenUI(rawData);
        }

        public int? OpenUI(RewardSelectFormRawData rawData)
        {
            RewardSelectFormContext context = BuildContext(rawData);
            return OpenUIInternal(context);
        }

        public override void BindUseCase(IUIUseCase useCase)
        {
            if (!(useCase is RewardSelectFormUseCase rewardSelectUseCase))
            {
                Log.Error("RewardSelectFormController.BindUseCase() useCase is invalid.");
                return;
            }

            _useCase = rewardSelectUseCase;
        }

        private static RewardSelectFormContext BuildContext(RewardSelectFormRawData rawData)
        {
            if (rawData == null)
            {
                return null;
            }

            return new RewardSelectFormContext
            {
                TipText = string.IsNullOrWhiteSpace(rawData.TipText) ? "Select one reward" : rawData.TipText,
                RefreshButtonText = BuildRefreshButtonText(rawData.RefreshCost, rawData.CanRefresh),
                CanRefresh = rawData.CanRefresh,
                CanGiveUp = rawData.CanGiveUp,
                RewardItems = BuildRewardItemContexts(rawData.RewardItems)
            };
        }

        private static string BuildRefreshButtonText(int refreshCost, bool canRefresh)
        {
            if (!canRefresh)
            {
                return "Refreshed";
            }

            if (refreshCost <= 0)
            {
                return "Refresh";
            }

            return $"Refresh -{refreshCost}";
        }

        private static RewardItemContext[] BuildRewardItemContexts(RewardSelectItemRawData[] rawItems)
        {
            if (rawItems == null || rawItems.Length <= 0)
            {
                return System.Array.Empty<RewardItemContext>();
            }

            RewardItemContext[] contexts = new RewardItemContext[rawItems.Length];
            for (int i = 0; i < rawItems.Length; i++)
            {
                RewardSelectItemRawData rawItem = rawItems[i];
                if (rawItem == null)
                {
                    continue;
                }

                contexts[i] = new RewardItemContext
                {
                    Index = i,
                    RewardId = rawItem.RewardId,
                    IconArea = new IconAreaContext
                    {
                        ComponentSlotType = rawItem.SlotType,
                        Icon = rawItem.Icon,
                        Rarity = rawItem.Rarity,
                        Color = ResolveIconColor(rawItem)
                    },
                    Title = rawItem.Title ?? string.Empty,
                    TypeText = ResolveTypeText(rawItem),
                    Description = rawItem.Description ?? string.Empty,
                    Tags = BuildTagContexts(rawItem.Tags),
                    IsSelectable = rawItem.IsSelectable,
                    UserData = rawItem.UserData
                };
            }

            return contexts;
        }

        private static Color ResolveIconColor(RewardSelectItemRawData rawItem)
        {
            if (rawItem?.SourceItem == null)
            {
                return Color.white;
            }

            return IconColorGenerator.GenerateForComponent(rawItem.SourceItem);
        }

        private static string ResolveTypeText(RewardSelectItemRawData rawItem)
        {
            if (!string.IsNullOrWhiteSpace(rawItem.TypeText))
            {
                return rawItem.TypeText;
            }

            return rawItem.SlotType switch
            {
                TowerCompSlotType.Muzzle => "Muzzle Component",
                TowerCompSlotType.Bearing => "Bearing Component",
                TowerCompSlotType.Base => "Base Component",
                TowerCompSlotType.Accessory => "Accessory",
                _ => "Component"
            };
        }

        private static TagItemContext[] BuildTagContexts(TagType[] tags)
        {
            if (tags == null || tags.Length <= 0)
            {
                return System.Array.Empty<TagItemContext>();
            }

            TagItemContext[] contexts = new TagItemContext[tags.Length];
            for (int i = 0; i < tags.Length; i++)
            {
                TagType tagType = tags[i];
                contexts[i] = new TagItemContext
                {
                    TagName = ResolveTagName(tagType)
                };
            }

            return contexts;
        }

        private static string ResolveTagName(TagType tagType)
        {
            if (tagType == TagType.None)
            {
                return string.Empty;
            }

            var tagTable = GameEntry.DataTable.GetDataTable<DRTag>();
            if (tagTable != null)
            {
                DRTag tagRow = tagTable.GetDataRow((int)tagType);
                if (tagRow != null && !string.IsNullOrWhiteSpace(tagRow.Name))
                {
                    return tagRow.Name;
                }
            }

            return tagType.ToString();
        }

        private void OnRewardSelected(object sender, GameEventArgs e)
        {
            if (!IsEventFromCurrentForm(sender) || !(e is RewardSelectItemSelectedEventArgs args))
            {
                return;
            }

            if (_useCase == null)
            {
                return;
            }

            RewardSelectFormRawData nextRawData = _useCase.SelectReward(args.SelectedIndex);
            if (nextRawData == null)
            {
                CloseUI();
                return;
            }

            OpenUI(nextRawData);
        }

        private void OnRefreshClicked(object sender, GameEventArgs e)
        {
            if (!IsEventFromCurrentForm(sender) || !(e is RewardSelectRefreshEventArgs))
            {
                return;
            }

            if (_useCase == null)
            {
                return;
            }

            RewardSelectFormRawData nextRawData = _useCase.TryRefresh();
            if (nextRawData == null)
            {
                CloseUI();
                return;
            }

            OpenUI(nextRawData);
        }

        private void OnGiveUpClicked(object sender, GameEventArgs e)
        {
            if (!IsEventFromCurrentForm(sender) || !(e is RewardSelectGiveUpEventArgs))
            {
                return;
            }

            if (_useCase == null)
            {
                return;
            }

            if (_useCase.TryGiveUp())
            {
                CloseUI();
            }
        }

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

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

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

            return false;
        }
    }
}