#include "BlueprintErrors.h"
#include "Internationalization/TextFormatter.h"
#include "Kismet/KismetSystemLibrary.h"
#include "Kismet2/KismetDebugUtilities.h"

#include "Kismet/KismetTextLibrary.h"

ELogVerbosity::Type UlxBlueprintErrorLibrary::ConvertElxLogVerbosity(ElxLogVerbosity Verbosity) {
	switch (Verbosity) {
		case ElxLogVerbosity::Error:		return ELogVerbosity::Error;
		case ElxLogVerbosity::Warning:		return ELogVerbosity::Warning;
		case ElxLogVerbosity::Display:		return ELogVerbosity::Display;
		case ElxLogVerbosity::Log:			return ELogVerbosity::Log;
		case ElxLogVerbosity::Verbose:		return ELogVerbosity::Verbose;
		case ElxLogVerbosity::VeryVerbose:	return ELogVerbosity::VeryVerbose;
		case ElxLogVerbosity::Fatal:		return ELogVerbosity::Fatal;
	}
}

void UlxBlueprintErrorLibrary::FormatErrorInternal(UObject *Context, ElxLogVerbosity Verbosity, ElxErrorDisplayDuration DisplayDuration, const FString &InPattern, TArray<FFormatArgumentData> InArgs)
{
	// Generate the formatted string.
	//
	FText InPatternText(FText::FromString(InPattern));
	FText Message = FTextFormatter::Format(MoveTemp(InPatternText), MoveTemp(InArgs), false, false);
	FString MessageString = Message.ToString();
	
	// Convert the DisplayDuration enum into a number of seconds.
	//
	int Seconds = int(DisplayDuration);
	if (Seconds > 100) Seconds = (Seconds - 100) * 60;

	// Choose a color appropriate to the verbosity level.
	//
	FLinearColor Color;
	switch (Verbosity) {
		case ElxLogVerbosity::Fatal   : Color = FLinearColor(1.0, 0.6, 0.6); break;
		case ElxLogVerbosity::Error   : Color = FLinearColor(1.0, 0.6, 0.6); break;
		case ElxLogVerbosity::Warning : Color = FLinearColor(0.9, 0.9, 0.6); break;
		default: Color = FLinearColor(0.8, 0.8, 0.8); break;
	}

	// Get the blueprint name.
	//
	// Normally, the log function expects you to pass in a filename, and a log
	// category name.  We use the blueprint name for both.
	//
	// Using the blueprint name as a log category name is not technically
	// correct.  However, there is no correct way to create log categories
	// from inside of blueprints.  Doing it this way at least produces a reasonable
	// message inside the log.  What doesn't work correctly is the log message
	// suppression system.  Ie, console commands like 'log <category> verbose'
	// don't have any effect here.  The design of the log message suppression
	// system is such that there just is no reasonable way to hook into it from
	// inside of blueprints.
	//
	FString BlueprintNameString = Context->GetClass()->GetName();
	auto BlueprintNameAnsi = StringCast<ANSICHAR>(*BlueprintNameString);
	FLogCategoryName BlueprintNameLogCategory(Context->GetClass()->GetFName());

	// Output to Screen, if requested.
	//
	if (Seconds != 0)
	{
		UKismetSystemLibrary::PrintText(NULL, Message, true, false, Color, Seconds, NAME_None);
	}

	// Output to Log
	//
    ELogVerbosity::Type VerbosityValue = ConvertElxLogVerbosity(Verbosity);
	if (VerbosityValue <= ELogVerbosity::COMPILED_IN_MINIMUM_VERBOSITY)
	{
		FMsg::Logf(BlueprintNameAnsi.Get(), 0, BlueprintNameLogCategory, VerbosityValue, TEXT("%s"), *MessageString);
	}
}


FlxDebugBlueprintErrorsOutputDevice::FlxDebugBlueprintErrorsOutputDevice(const ElxLogVerbosity &SensitivityRef)
    : Sensitivity(SensitivityRef)
{
	GLog->AddOutputDevice(this);
}

FlxDebugBlueprintErrorsOutputDevice::~FlxDebugBlueprintErrorsOutputDevice()
{
	GLog->RemoveOutputDevice(this);
}

namespace UBreakPoint {
    static volatile int V;
    FORCENOINLINE static void OnLogFatal() {
        V = 0;
    }
    FORCENOINLINE static void OnLogError() {
		V = 1;
        OnLogFatal();
	}
    FORCENOINLINE static void OnLogWarning() {
        V = 2;
        OnLogError();
    }
}

static const FName LogBlueprintDebugName(TEXT("LogBlueprintDebug"));


void FlxDebugBlueprintErrorsOutputDevice::Serialize(const TCHAR* V, ELogVerbosity::Type Verbosity, const FName& Category)
{
    // If the error isn't serious enough, do nothing.
    //
    if (Verbosity > UlxBlueprintErrorLibrary::ConvertElxLogVerbosity(Sensitivity))
    {
        return;
    }

    // If the Category is LogBlueprintDebug, then we're inside the debugger already.
    //
    if (Category == LogBlueprintDebugName)
    {
        return;
    }

    // Find out if we're running in a blueprint thread.  If not, return.
    //
    FFrame* Frame = FFrame::GetThreadLocalTopStackFrame();
    if (Frame == nullptr) return;
    UObject *TopObject = Frame->Object;
    if (TopObject == nullptr) return;

    // Notify the debugger that there's been an exception.
    //
    FBlueprintExceptionInfo ExceptionInfo(EBlueprintExceptionType::Breakpoint, FText::FromStringView(FStringView(V)));
    FBlueprintCoreDelegates::ThrowScriptException(TopObject, *Frame, ExceptionInfo);
}