"""
 *  Logarithm Graph Creator - Create graphs with logarithm scales.
 *  Copyright (C) 2020  Ad5001
 * 
 *  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.
 * 
 *  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/>.
"""

from PySide2.QtWidgets import QApplication, QFileDialog
from PySide2.QtQml import QQmlApplicationEngine, qmlRegisterType
from PySide2.QtCore import Qt, QObject, Signal, Slot, Property
from PySide2.QtGui import QIcon

import os
import tempfile
from platform import release as os_release
from json import dumps
from sys import platform, argv

pwd = os.getcwd()
os.chdir(os.path.dirname(os.path.realpath(__file__)))


tempfile = tempfile.mkstemp(suffix = '.png')[1]

def get_linux_theme():
    des = {
        "KDE": "fusion", # org.kde.desktop resolves to universal in PySide2.
        "gnome": "default",
        "lxqt": "fusion",
        "mate": "fusion",
    }
    if "XDG_SESSION_DESKTOP" in os.environ:
        return des[os.environ["XDG_SESSION_DESKTOP"]] if os.environ["XDG_SESSION_DESKTOP"] in des else "fusion"
    else:
        # Android
        return "Material"
os.environ["QT_QUICK_CONTROLS_STYLE"] = {
    "linux": get_linux_theme(),
    "freebsd": get_linux_theme(),
    "win32": "universal" if os_release == "10" else "fusion",
    "cygwin": "fusion",
    "darwin": "imagine"
}[platform]

class Helper(QObject):
    @Slot(str, str)
    def write(self, filename, filedata):
        if os.path.exists(os.path.dirname(os.path.realpath(filename))):
            f = open(os.path.realpath(filename), 'w',  -1, 'utf8')
            f.write(filedata)
            f.close()
        
    @Slot(str, result=str)
    def load(self, filename):
        if os.path.exists(os.path.realpath(filename)):
            f = open(os.path.realpath(filename), 'r',  -1, 'utf8')
            data = f.read()
            f.close()
            return data
        return '{}'

    @Slot(result=str)
    def gettmpfile(self):
        global tempfile
        return tempfile
    
    @Slot()
    def copyImageToClipboard(self):
        global tempfile
        # TODO: Better copy system
        os.system("xclip -selection clipboard -t image/png -i " + tempfile)

app = QApplication(argv)
app.setApplicationName("Logarithmic Plotter")
app.setOrganizationName("Ad5001")
app.setWindowIcon(QIcon(os.path.realpath(os.path.join(os.getcwd(), "logplotter.svg"))))
engine = QQmlApplicationEngine()
helper = Helper()
engine.rootContext().setContextProperty("Helper", helper)

engine.addImportPath(os.path.realpath(os.path.join(os.getcwd(), "qml")))
engine.load(os.path.realpath(os.path.join(os.getcwd(), "qml", "LogGraph.qml")))

os.chdir(pwd)
if len(argv) > 0 and os.path.exists(argv[-1]) and argv[-1].split('.')[-1] in ['json', 'lgg', 'lpf']:
    print(argv[-1])
    engine.rootObjects()[0].loadDiagram(argv[-1])
os.chdir(os.path.dirname(os.path.realpath(__file__)))

if not engine.rootObjects():
    print("No root object")
    exit(-1)
app.exec_()

os.remove(tempfile)