/* SPDX-FileCopyrightText: 2026 Project Tick
 * SPDX-FileContributor: Project Tick
 * SPDX-License-Identifier: GPL-3.0-or-later WITH LicenseRef-MeshMC-MMCO-Module-Exception-1.0
 *
 *   MeshMC - A Custom Launcher for Minecraft
 *   Copyright (C) 2026 Project Tick
 *
 *   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, either version 3 of the License, or
 *   (at your option) any later version, with the additional permission
 *   described in the MeshMC MMCO Module Exception 1.0.
 *
 *   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 for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 *   You should have received a copy of the MeshMC MMCO Module Exception 1.0
 *   along with this program.  If not, see <https://projecttick.org/licenses/>.
 *
 *  This file incorporates work covered by the following copyright and
 *  permission notice:
 *
 * Copyright 2013-2021 MultiMC Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include "MinecraftAccount.h"

#include <QObject>
#include <QVariant>
#include <QAbstractListModel>
#include <QSharedPointer>

/*!
 * List of available Mojang accounts.
 * This should be loaded in the background by MeshMC on startup.
 */
class AccountList : public QAbstractListModel
{
	Q_OBJECT
  public:
	enum ModelRoles { PointerRole = 0x34B1CB48 };

	enum VListColumns {
		// TODO: Add icon column.
		NameColumn = 0,
		ProfileNameColumn,
		TypeColumn,
		StatusColumn,

		NUM_COLUMNS
	};

	explicit AccountList(QObject* parent = 0);
	virtual ~AccountList() noexcept;

	const MinecraftAccountPtr at(int i) const;
	int count() const;

	//////// List Model Functions ////////
	QVariant data(const QModelIndex& index, int role) const override;
	virtual QVariant headerData(int section, Qt::Orientation orientation,
								int role) const override;
	virtual int rowCount(const QModelIndex& parent) const override;
	virtual int columnCount(const QModelIndex& parent) const override;
	virtual Qt::ItemFlags flags(const QModelIndex& index) const override;
	virtual bool setData(const QModelIndex& index, const QVariant& value,
						 int role) override;

	void addAccount(const MinecraftAccountPtr account);
	void removeAccount(QModelIndex index);
	int findAccountByProfileId(const QString& profileId) const;
	/*!
	 * Returns the index of the first **offline** account whose stored
	 * offlineUsername matches \a username case-insensitively (Minecraft
	 * itself is case-sensitive but the launcher's profile listing is
	 * not, and users routinely confuse "Player" with "player").
	 * Returns -1 if no such account exists. MSA accounts are skipped —
	 * an MSA profile that happens to share a name with an offline one
	 * does NOT count as a duplicate.
	 */
	int findOfflineAccountByUsername(const QString& username) const;
	MinecraftAccountPtr
	getAccountByProfileName(const QString& profileName) const;
	QStringList profileNames() const;

	// requesting a refresh pushes it to the front of the queue
	void requestRefresh(QString accountId);
	// queuing a refresh will let it go to the back of the queue (unless it's
	// somewhere inside the queue already)
	void queueRefresh(QString accountId);

	/*!
	 * Sets the path to load/save the list file from/to.
	 * If autosave is true, this list will automatically save to the given path
	 * whenever it changes. THIS FUNCTION DOES NOT LOAD THE LIST. If you set
	 * autosave, be sure to call loadList() immediately after calling this
	 * function to ensure an autosaved change doesn't overwrite the list you
	 * intended to load.
	 */
	void setListFilePath(QString path, bool autosave = false);

	bool loadList();
	bool loadV3(QJsonObject& root);
	bool saveList();

	MinecraftAccountPtr defaultAccount() const;
	void setDefaultAccount(MinecraftAccountPtr profileId);
	bool anyAccountIsValid();

	bool isActive() const;

  protected:
	void beginActivity();
	void endActivity();

  private:
	const char* m_name;
	uint32_t m_activityCount = 0;
  signals:
	void listChanged();
	void listActivityChanged();
	void defaultAccountChanged();
	void activityChanged(bool active);

  public slots:
	/**
	 * This is called when one of the accounts changes and the list needs to be
	 * updated
	 */
	void accountChanged();

	/**
	 * This is called when a (refresh/login) task involving the account starts
	 * or ends
	 */
	void accountActivityChanged(bool active);

	/**
	 * This is initially to run background account refresh tasks, or on a hourly
	 * timer
	 */
	void fillQueue();

  private slots:
	void tryNext();

	void authSucceeded();
	void authFailed(QString reason);

  protected:
	QList<QString> m_refreshQueue;
	QTimer* m_refreshTimer;
	QTimer* m_nextTimer;
	shared_qobject_ptr<AccountTask> m_currentTask;

	/*!
	 * Called whenever the list changes.
	 * This emits the listChanged() signal and autosaves the list (if autosave
	 * is enabled).
	 */
	void onListChanged();

	/*!
	 * Called whenever the active account changes.
	 * Emits the defaultAccountChanged() signal and autosaves the list if
	 * enabled.
	 */
	void onDefaultAccountChanged();

	QList<MinecraftAccountPtr> m_accounts;

	MinecraftAccountPtr m_defaultAccount;

	//! Path to the account list file. Empty string if there isn't one.
	QString m_listFilePath;

	/*!
	 * If true, the account list will automatically save to the account list
	 * path when it changes. Ignored if m_listFilePath is blank.
	 */
	bool m_autosave = false;
};
