// Copyright (c) 2013- PPSSPP Project.

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0 or later versions.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License 2.0 for more details.

// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/

// Official git repository and contact information can be found at
// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.

#pragma once

#include <atomic>
#include <functional>
#include <memory>
#include <vector>

#include "UI/BaseScreens.h"
#include "Common/UI/UIScreen.h"
#include "Common/File/Path.h"
#include "UI/GameInfoCache.h"
#include "Core/HLE/Plugins.h"
#include "Core/Util/PkgUnpack.h"
#include "UI/SimpleDialogScreen.h"


class NoticeView;

// Game screen: Allows you to start a game, delete saves, delete the game,
// set game specific settings, etc.

// Uses GameInfoCache heavily to implement the functionality.
// Should possibly merge this with the PauseScreen.

class GameScreen : public UITwoPaneBaseDialogScreen {
public:
	GameScreen(const Path &gamePath, bool inGame);
	~GameScreen();

	void update() override;

	const char *tag() const override { return "Game"; }

	// The game was deleted or removed from recents, so the screen we return to should refresh.
	bool GameRemoved() const { return gameRemoved_; }

protected:
	void BeforeCreateViews() override;
	void CreateContentViews(UI::ViewGroup *parent) override;
	void CreateSettingsViews(UI::ViewGroup *parent) override;
	void CreateContextMenu(UI::ViewGroup *parent) override;
	void dialogFinished(const Screen *dialog, DialogResult result) override;

	std::string_view GetTitle() const override;
	// The progress bar of a pack running in the background.
	void DrawForeground(UIContext &dc) override;

private:
	// Event handlers
	void OnGameSettings(UI::EventParams &e);
	void OnDeleteSaveData(UI::EventParams &e);
	void OnDeleteGame(UI::EventParams &e);
	void OnCreateConfig(UI::EventParams &e);
	void OnDeleteConfig(UI::EventParams &e);
	void OnSetBackground(UI::EventParams &e);
	void OnDeleteGameUpdate(UI::EventParams &e);

	// What's known about the game from outside its file: an installed update, plugins, and whether
	// the installed firmware can play it. All disk access, so it's looked up on a worker thread,
	// and the views are recreated when it's in.
	struct Lookups {
		bool hasInstalledUpdate = false;
		InstalledGameUpdate installedUpdate;
		std::vector<HLEPlugins::PluginInfo> plugins;
		Path umdVideoVSHPath;
		bool firmwareRunsPS1Discs = false;
	};
	struct LookupTask {
		std::atomic<bool> done{};
		Lookups result;
	};
	void StartLookups();

	std::string CRC32string;

	bool isHomebrew_ = false;
	bool inGame_ = false;
	bool gameRemoved_ = false;
	bool finishRequested_ = false;

	// Keep track of progressive loading of metadata.
	GameInfoFlags knownFlags_ = GameInfoFlags::EMPTY;

	bool knownHasCRC_ = false;

	// GamePacker state the views were made for.
	int packGeneration_ = 0;
	bool packBarShown_ = false;

	// installedUpdate is a game update in PSP/GAME/<DISC_ID>, which is what actually runs when there is one.
	Lookups lookups_;
	std::shared_ptr<LookupTask> lookupTask_;  // While one runs.
	bool lookupsStarted_ = false;
	bool lookupsPending_ = false;

	std::shared_ptr<GameInfo> info_;
	mutable std::string titleCache_;
};