// Fill out your copyright notice in the Description page of Project Settings.


#include "DataTableRowSelectorCustomization.h"

#include "DetailLayoutBuilder.h"
#include "DetailWidgetRow.h"
#include "IDetailChildrenBuilder.h"
#include "IPropertyUtilities.h"
#include "AssetRegistry/AssetRegistryModule.h"
#include "ProjectFish/Definations.h"


void FDataTableRowSelectorCustomization::CustomizeHeader(TSharedRef<IPropertyHandle> PropertyHandle,
                                                         FDetailWidgetRow& HeaderRow, IPropertyTypeCustomizationUtils& CustomizationUtils)
{
	HeaderRow
	.NameContent()
	[
		PropertyHandle->CreatePropertyNameWidget()
	];
}

void FDataTableRowSelectorCustomization::CustomizeChildren(TSharedRef<IPropertyHandle> PropertyHandle,
                                                           IDetailChildrenBuilder& ChildBuilder, IPropertyTypeCustomizationUtils& CustomizationUtils)
{
	//获取meta中的过滤类型
	DataTableHandle = PropertyHandle->GetChildHandle(GET_MEMBER_NAME_CHECKED(FSkillDataConfig, DataTable));
	FProperty* metaProperty = DataTableHandle->GetMetaDataProperty();
	AllowRowType = metaProperty->GetMetaData("RowType");
	TWeakPtr<IPropertyUtilities> PropertyUtils = CustomizationUtils.GetPropertyUtilities();
	//动态生成DataTable下拉菜单
	RefreshDataTableAfterFilter();
	//获得默认的属性值
	UObject* CurrentValue = nullptr;
	DataTableHandle->GetValue(CurrentValue); // 获取当前设置的 DataTable
	SelectedDataTable = CurrentValue ? FName(CurrentValue->GetName()) : NAME_None;
	//添加datatable 列表
	TSharedPtr<SComboBox<FName>> DataTableComboBox = SNew(SComboBox<FName>)
		.OptionsSource(&FilteredDataTableNames)
		.Content()
		[
			SNew(STextBlock)
			   .Text_Lambda([this]() -> FText {
					return FText::FromName(SelectedDataTable);
			   })
		]
		.OnGenerateWidget_Lambda([](FName InItem)
		{
			
			UDataTable* dataTable = Cast<UDataTable>(FSoftObjectPath(InItem.ToString()).TryLoad());
			return SNew(STextBlock)
				.Text(FText::FromString(dataTable->GetName()));
		})
		.OnSelectionChanged_Lambda([this, PropertyHandle, PropertyUtils, &DataTableComboBox, &ChildBuilder](FName SelectedTableName, ESelectInfo::Type SelectInfo)
		{
			UDataTable* dataTable = Cast<UDataTable>(FSoftObjectPath(SelectedTableName.ToString()).TryLoad());
			DataTableHandle->SetValue(dataTable);
			SelectedDataTable = FName(dataTable->GetName());
		
			//更新行选择器
			GenerateRowNameSelecter( PropertyHandle, ChildBuilder);
			PropertyUtils.Pin()->ForceRefresh();
		});
	
	ChildBuilder.AddCustomRow(FText::FromString(TEXT("DataTable")))
	.NameContent()
	[	SNew(STextBlock)
			.Text(FText::FromString(TEXT("SkillDataTable")))
			.Font(IDetailLayoutBuilder::GetDetailFont())
			]
	.ValueContent()
	[DataTableComboBox.ToSharedRef()];

	//添加默认的row列表
	if (!SelectedDataTable.IsNone())
	{
		GenerateRowNameSelecter( PropertyHandle, ChildBuilder);
	}
}

void FDataTableRowSelectorCustomization::RefreshDataTableAfterFilter()
{
	FilteredDataTableNames.Empty();
	FAssetRegistryModule& AssetRegistry = FModuleManager::LoadModuleChecked<FAssetRegistryModule>("AssetRegistry");
	TArray<FAssetData> AllDataTables;
	AssetRegistry.Get().GetAssetsByClass(UDataTable::StaticClass()->GetClassPathName(), AllDataTables);
	//UEn内部存储是没有F的
	FString BaseName = AllowRowType.StartsWith("F") ? AllowRowType.Mid(1) : AllowRowType;
	for (const FAssetData& Asset: AllDataTables)
	{
		FString RowStructPath  = Asset.GetTagValueRef<FString>("RowStructure");
		if (RowStructPath.EndsWith(BaseName))
		{
			FilteredDataTableNames.Add(FName(Asset.GetObjectPathString()));
			//FilteredDataTables.Add(MakeShareable(Cast<UDataTable>(FSoftObjectPath(Asset.GetObjectPathString()).TryLoad())));
		}
	}
}

void FDataTableRowSelectorCustomization::GenerateRowNameSelecter(TSharedRef<IPropertyHandle> PropertyHandle,  IDetailChildrenBuilder& ChildBuilder)
{
	RowNameHandle = PropertyHandle->GetChildHandle(GET_MEMBER_NAME_CHECKED(FSkillDataConfig, SkillRowName));
	UObject* CurrentTable = nullptr;
	DataTableHandle->GetValue(CurrentTable);
	UDataTable* CurrentDataTable = Cast<UDataTable>(CurrentTable);
	
	if (CurrentDataTable)
	{
		//获得默认的选中行
		FName defaultRowName;
		RowNameHandle->GetValue(defaultRowName);
		FSkillData* skillData = CurrentDataTable->FindRow<FSkillData>(defaultRowName, "");
		if (skillData)
			SelectedRowName = FName(skillData->SkillName.ToString());
		
		DataTableRows = CurrentDataTable->GetRowNames();
		TSharedPtr<SComboBox<FName>> RowNameComboBox = SNew(SComboBox<FName>)
			.OptionsSource(&DataTableRows)
			.Content()
			[
				SNew(STextBlock)
			   .Text_Lambda([this]() -> FText {
					return FText::FromName(SelectedRowName);
			   })
			]
			.OnGenerateWidget_Lambda([this](FName rowName) {
				UObject* CurrentTable = nullptr;
				DataTableHandle->GetValue(CurrentTable);
				UDataTable* CurrentDataTable = Cast<UDataTable>(CurrentTable);
				FSkillData* skillData = CurrentDataTable->FindRow<FSkillData>(rowName, "");
				return SNew(STextBlock).Text(skillData->SkillName);
			})
			.OnSelectionChanged_Lambda([&](FName SelectedDataTableName, ESelectInfo::Type) {
				UObject* CurrentTable = nullptr;
				DataTableHandle->GetValue(CurrentTable);
				UDataTable* CurrentDataTable = Cast<UDataTable>(CurrentTable);
				FSkillData* skillData = CurrentDataTable->FindRow<FSkillData>(SelectedDataTableName, "");
				SelectedRowName = FName(skillData->SkillName.ToString());
				RowNameHandle->SetValue(SelectedDataTableName);
			});
		
		ChildBuilder.AddCustomRow(FText::FromString(TEXT("Row")))
		.NameContent()[
			SNew(STextBlock)
		.Text(FText::FromString(TEXT("SkillRowName")))
		.Font(IDetailLayoutBuilder::GetDetailFont())
		]
			.ValueContent()[ RowNameComboBox.ToSharedRef() ];
	}

	

}