# -*- coding:utf-8 -*-
import os
import sys
import fileDataCreating
import global_var

from pathlib import Path

from PySide6.QtUiTools import loadUiType
from PySide6.QtCore import Slot,Signal,QThread,QObject,QEventLoop,QTimer
from PySide6.QtWidgets import QApplication
from PySide6.QtGui import QTextCursor

# 声明全局变量
global_var._init()
# 定义公共路径
path = Path(__file__)
ui_file_patch = path.parent.parent / "ui" / "ui_main.ui"
# 从文件中加载UI定义
formType, baseType = loadUiType(str(ui_file_patch))

# 重定向输出
class EmittingStr(QObject):
    textWritten = Signal(str) 
    def write(self, text):
      self.textWritten.emit(str(text))
      loop = QEventLoop()
      QTimer.singleShot(100, loop.quit)
      loop.exec_()
      QApplication.processEvents()


# 处理文件的线程
class FileThread(QThread):

    def __init__(self, parent=None):
        super().__init__(parent=parent)
    # 覆盖原来run去调用文件造数据脚本
    def run(self):
        fileDataCreating.main()


# GUI的主程序
class Window(formType, baseType):

    def __init__(self):
        super(Window, self).__init__()
        self.setupUi(self)
        self.setup_thread()

        # 输出设置
        self.Log_Output.document().setMaximumBlockCount(100)
        self.Log_Output.ensureCursorVisible()
        # 将控制台输出重定向到textBrowser中
        sys.stdout = EmittingStr()
        sys.stdout.textWritten.connect(self.outputWritten)

    @Slot()  #声明槽函数
    def start(self):
        print('点击了开始按钮')
        # 输入框参数校验
        num = self.tabWidget.currentIndex()
        if num == 0:
            self.check_file_input()
        else:
            self.conntest()
        # 开始运行
        if num == 0:
            self.start_thread()
        else:
            self.start_run_db()
        # 按钮置灰
        self.startButton.setEnabled(False)


    @Slot()
    def stop(self):
        print('点击了停止按钮')
        num = self.tabWidget.currentIndex()
        if num == 0:
            self.stop_run_file()
        else:
            self.stop_run_db()
        # 按钮恢复
        # self.startButton.isEnabled() 获取按钮的状态
        self.startButton.setEnabled(True)

    @Slot()
    def conntest(self):
        print('点击了测试连接按钮')
        self.check_db_input()
        # TODO(MH):校验连接信息
        print('数据库连接成功')


    def setup_thread(self):
        self.thread = FileThread()
        global_var.set_value('start_flag',True)
        self.thread_running = global_var.get_value('start_flag')
        

    def start_thread(self):
        if self.thread_running:
            self.thread.start()
        else:
            self.setup_thread()
            self.thread.start()


    def check_file_input(self):
        print('文件参数校验通过')


    def check_db_input(self):
        print('数据库参数校验通过，开始连接数据库测试。。。')


    def start_run_file(self):

        # 调用文件处理脚本
        print('开始生成文件。。。')



    def start_run_db(self):
        pass


    def stop_run_file(self):
        # 终止线程的事件循环
        global_var.set_value('start_flag',False)
        self.thread.quit()
        # 标记线程停止
        self.thread_running = global_var.get_value('start_flag')  
        


    def stop_run_db(self):
        pass

    # 输出到GUI
    def outputWritten(self, text):
      cursor = self.Log_Output.textCursor()
      cursor.movePosition(QTextCursor.End)
      cursor.insertText(text)
      self.Log_Output.setTextCursor(cursor)
      self.Log_Output.ensureCursorVisible()