# Importing the QThread, QDateTime, and pyqtSignal classes from the PyQt5.QtCore module.
from PyQt5.QtCore import QThread, QDateTime, pyqtSignal

# Importing the QIcon and QFont classes from the PyQt5.QtGui module.
from PyQt5.QtGui import QIcon, QFont

# Importing the QWidget, QLabel, QDateTimeEdit, QPushButton, QFormLayout, and QApplication classes from the
# PyQt5.QtWidgets module.
from PyQt5.QtWidgets import QWidget, QLabel, QDateTimeEdit, QPushButton, QFormLayout, QApplication

# Importing the os, sys, and time modules.
import os, sys, time

# Importing the images.py file.
import images

# This class is a widget that contains a button and a text box. When the button is clicked, the text box is filled with
# the closest company name to the one entered
class CloseCompUI(QWidget):
    def __init__(self):
        """
        A constructor. It is called when an object is created from a class and it allows the class to initialize the
        attributes of a class.
        """
        super(CloseCompUI, self).__init__()
        self.init_ui()

    def init_ui(self):
        """
        This function initializes the UI.
        """
        self.setWindowTitle('自動關機小工具  公眾號：Python 集中營')
        self.setWindowIcon(QIcon(':/comp.ico'))
        self.setFixedWidth(380)
        self.setFixedHeight(120)

        self.is_close = False

        self.shutdown_time_lab = QLabel()
        self.shutdown_time_lab.setText('設置關機時間：')

        self.shutdown_time_in = QDateTimeEdit(QDateTime.currentDateTime())
        self.shutdown_time_in.setDisplayFormat('yyyy-MM-dd HH:mm:ss')
        self.shutdown_time_in.setCalendarPopup(True)

        self.submit_btn = QPushButton()
        self.submit_btn.setText('提交關機')
        self.submit_btn.clicked.connect(self.submit_btn_click)

        self.clear_btn = QPushButton()
        self.clear_btn.setText('清除關機')
        self.clear_btn.clicked.connect(self.clear_btn_click)

        self.show_message_lab = QLabel()
        self.show_message_lab.setText('更多免費小工具源碼獲取請前往公眾號：Python 集中營！')
        self.show_message_lab.setFont(QFont('黑體', 8))

        fbox = QFormLayout()
        fbox.addRow(self.shutdown_time_lab, self.shutdown_time_in)
        fbox.setSpacing(15)
        fbox.addRow(self.clear_btn, self.submit_btn)
        fbox.addRow(self.show_message_lab)

        self.thread_ = CloseCompThread(self)
        self.thread_.message.connect(self.show_message_lab_click)

        self.setLayout(fbox)

def show_message_lab_click(self, message):
    self.show_message_lab.setText(message + '，公眾號：Python 集中營！')

def submit_btn_click(self):
    if self.shutdown_time_in.text():
        self.is_close = True
        self.thread_.start()
    else:
        self.show_message_lab_click('請先設置關機時間')

def clear_btn_click(self):
    self.is_close = False
    self.thread_.start()

# This class is a QThread that runs a function that takes a list of strings and returns a list of strings
class CloseCompThread(QThread):
    message = pyqtSignal(str)

    def __init__(self, parent=None):
        """
        A constructor that initializes the class.

        :param parent: The parent widget
        """
        super(CloseCompThread, self).__init__(parent)
        self.parent = parent
        self.working = True

    def __del__(self):
        """
        If the shutdown time is set, the shutdown thread is started, otherwise the message is displayed
        """
        self.working = False
        self.wait()

    def run(self):
        """
        *|CURSOR_MARCADOR|*
        """
        try:
            is_close = self.parent.is_close
            print(is_close)
            if is_close is True:
                shutdown_time_in = self.parent.shutdown_time_in.text()
                t = time.strptime(shutdown_time_in, "%Y-%m-%d %H:%M:%S")
                t1 = int(time.mktime(t))
                t0 = int(time.time())
                num = t1 - t0
                if num > 0:
                    os.system('shutdown -s -t %d' % num)
                    self.message.emit("此電腦將在%s關機" % shutdown_time_in)
                else:
                    self.message.emit("關機時間不能小于當前操作系統(tǒng)時間")
            else:
                os.system('shutdown -a')
                self.message.emit("已經(jīng)清除自動關機設置")
        except:
            self.message.emit("提交/清除自動關機出現(xiàn)錯誤")

# A common idiom in Python to use this to guard the main body of your code.
if __name__ == '__main__':
    app = QApplication(sys.argv)
    main = CloseCompUI()
    main.show()
    sys.exit(app.exec_())