// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.

#pragma once

#include "CoreMinimal.h"
#include "SlateFwd.h"
#include "ISourceControlProvider.h"


/** Info supplied as argument to delegate FSourceControlWindowsOnCheckInComplete called by FSourceControlWindows::ChoosePackagesToCheckIn() and optional argument to PromptForCheckin(). */
struct SOURCECONTROLWINDOWS_API FCheckinResultInfo
{
	/** Default Constructor */
	FCheckinResultInfo();

	/** Succeeded - if packages were selected and successfully checked in, Cancelled - if the user aborted the process, Failed - if an issue was encountered during the process */
	ECommandResult::Type Result;

	/** true if added and modified files were automatically checked out from source control again after being submitted, false if not */
	bool bAutoCheckedOut;

	/** Files that were added. */
	TArray<FString> FilesAdded;

	/** Files that were modified and checked in. */
	TArray<FString> FilesSubmitted;

	/** Text that describes result whether failed, cancelled or successful. */
	FText Description;
};

/** Optional delegate called when FSourceControlWindows::ChoosePackagesToCheckIn() completes. */
DECLARE_DELEGATE_OneParam(FSourceControlWindowsOnCheckInComplete, const FCheckinResultInfo&);

class SOURCECONTROLWINDOWS_API FSourceControlWindows
{
public:
	/**
	 * Opens a user dialog to choose packages to submit.
	 *
	 * @param	OnCompleteDelegate	Delegate to call when this user-based operation is complete. Also see FCheckinResultInfo.
	 * @return	true - if command successfully in progress and OnCompleteDelegate will be called when complete, false - if immediately unable to comply (such as source control not enabled)
	 */
	static bool ChoosePackagesToCheckIn(const FSourceControlWindowsOnCheckInComplete& OnCompleteDelegate = FSourceControlWindowsOnCheckInComplete());

	/** Determines whether we can choose packages to check in (we cant if an operation is already in progress) */
	static bool CanChoosePackagesToCheckIn();

	/**
	 * Display check in dialog for the specified packages and get additional result information
	 *
	 * @param	OutResultInfo					Optional FCheckinResultInfo to store information about checked in files and whether the check in was successful
	 * @param	InPackageNames					Names of packages to check in
	 * @param	InPendingDeletePaths			Directories to check for files marked 'pending delete'
	 * @param	InConfigFiles					Config filenames to check in
	 * @param	bUseSourceControlStateCache		Whether to use the cached source control status, or force the status to be updated
	 * 
	 * @return	true - if completed successfully in progress and OnCompleteDelegate will be called when complete, false - if immediately unable to comply (such as source control not enabled)
	 */
	static bool PromptForCheckin(FCheckinResultInfo& OutResultInfo, const TArray<FString>& InPackageNames, const TArray<FString>& InPendingDeletePaths = TArray<FString>(), const TArray<FString>& InConfigFiles = TArray<FString>(), bool bUseSourceControlStateCache = false);

	/**
	 * Display check in dialog for the specified packages
	 *
	 * @param	bUseSourceControlStateCache		Whether to use the cached source control status, or force the status to be updated
	 * @param	InPackageNames					Names of packages to check in
	 * @param	InPendingDeletePaths			Directories to check for files marked 'pending delete'
	 * @param	InConfigFiles					Config filenames to check in
	 * 
	 * @return	true - if completed successfully in progress and OnCompleteDelegate will be called when complete, false - if immediately unable to comply (such as source control not enabled)
	 */
	static bool PromptForCheckin(bool bUseSourceControlStateCache, const TArray<FString>& InPackageNames, const TArray<FString>& InPendingDeletePaths = TArray<FString>(), const TArray<FString>& InConfigFiles = TArray<FString>());

	/**
	 * Display file revision history for the provided packages
	 *
	 * @param	InPackageNames	Names of packages to display file revision history for
	 */
	static void DisplayRevisionHistory( const TArray<FString>& InPackagesNames );

	/**
	 * Prompt the user with a revert files dialog, allowing them to specify which packages, if any, should be reverted.
	 *
	 * @param	InPackageNames	Names of the packages to consider for reverting
	 *
	 * @return	true if the files were reverted; false if the user canceled out of the dialog
	 */
	static bool PromptForRevert(const TArray<FString>& InPackageNames );

protected:
	/** Callback for ChoosePackagesToCheckIn(), continues to bring up UI once source control operations are complete */
	static void ChoosePackagesToCheckInCallback(const FSourceControlOperationRef& InOperation, ECommandResult::Type InResult, FSourceControlWindowsOnCheckInComplete OnCompleteDelegate);

	/** Called when the user selection process has completed and we have packages to check in. */
	static void ChoosePackagesToCheckInCompleted(const TArray<UPackage*>& LoadedPackages, const TArray<FString>& PackageNames, const TArray<FString>& ConfigFiles, FCheckinResultInfo& OutResultInfo);

	/** Delegate called when the user has decided to cancel the check in process */
	static void ChoosePackagesToCheckInCancelled(FSourceControlOperationRef InOperation);

	/** Delegate called when the user clicks submit.  if the return value is true the submit dialog is closed.  Otherwise it is left open for further corrections */
	static bool OnSubmitClicked(TSharedRef<class SSourceControlSubmitWidget> SourceControlWidget);
private:
	/** The notification in place while we choose packages to check in */
	static TWeakPtr<class SNotificationItem> ChoosePackagesToCheckInNotification;
};