import socket
import sys

import pymysql
from PySide6 import QtWidgets
from PySide6.QtWidgets import QApplication, QMainWindow, QTableWidget, QTableWidgetItem, QVBoxLayout, QWidget, \
    QTextEdit, QPushButton, QHBoxLayout, QLineEdit, QMessageBox


class TableWidgetExample(QMainWindow):
    def __init__(self):
        super().__init__()

        self.connection = None
        self.cursor = None
        self.is_connect = False

        # self.button_add = None
        # self.button_execute = None
        # self.input_text = None

        # self.connection_host = None
        # self.connection_port = None
        # self.connection_user = None
        # self.connection_pwd = None

        self.initUI()

    def initUI(self):
        self.setWindowTitle("采集")
        self.setGeometry(100, 100, 800, 600)

        central_widget = QWidget()
        center_layout = QVBoxLayout(central_widget)
        # central_widget.setLayout(center_layout)
        self.setCentralWidget(central_widget)

        top_widget = QWidget()
        top_layout = QVBoxLayout(top_widget)

        table = QTableWidget()
        table.setColumnCount(2)

        table.setHorizontalHeaderLabels(["URL", "状态"])
        header = table.horizontalHeader()

        header.setSectionResizeMode(QtWidgets.QHeaderView.ResizeToContents)
        header.setSectionResizeMode(0, QtWidgets.QHeaderView.Stretch)

        # data = [
        #     ["https://baidu.com", "队列中"],
        #     ["https://google.com", "队列中"],
        #     ["https://rainss.cn", "队列中"],
        #     ["https://baidu.com", "队列中"],
        #     ["https://google.com", "队列中"],
        #     ["https://rainss.cn", "队列中"],
        #     ["https://baidu.com", "队列中"],
        #     ["https://google.com", "队列中"],
        #     ["https://rainss.cn", "队列中"],
        #     ["https://baidu.com", "队列中"],
        #     ["https://google.com", "队列中"],
        #     ["https://rainss.cn", "队列中"]
        # ]
        #
        # table.setRowCount(len(data))
        #
        # for row, rowData in enumerate(data):
        #     for col, value in enumerate(rowData):
        #         item = QTableWidgetItem(value)
        #         table.setItem(row, col, item)

        top_layout.addWidget(table)
        center_layout.addWidget(top_widget)

        # 下部分布局
        bottom_widget = QWidget()
        bottom_widget.setFixedHeight(200)
        bottom_layout = QVBoxLayout(bottom_widget)
        self.input_text = QTextEdit()
        self.input_text.setPlaceholderText("请输入链接，一行一个")
        bottom_layout.addWidget(self.input_text)

        connection_layout = QHBoxLayout()
        self.connection_host = QLineEdit()
        self.connection_host.setPlaceholderText("地址")

        self.connection_port = QLineEdit()
        self.connection_port.setPlaceholderText("端口")

        self.connection_dbname = QLineEdit()
        self.connection_dbname.setPlaceholderText("数据库")

        self.connection_user = QLineEdit()
        self.connection_user.setPlaceholderText("用户名")

        self.connection_pwd = QLineEdit()
        self.connection_pwd.setPlaceholderText("密码")
        self.connection_pwd.setEchoMode(QLineEdit.Password)

        self.button_connection = QPushButton("连接")
        self.button_connection.clicked.connect(self.connect_to_database)

        connection_layout.addWidget(self.connection_host)
        connection_layout.addWidget(self.connection_port)
        connection_layout.addWidget(self.connection_dbname)
        connection_layout.addWidget(self.connection_user)
        connection_layout.addWidget(self.connection_pwd)
        connection_layout.addWidget(self.button_connection)
        bottom_layout.addLayout(connection_layout)

        action_layout = QHBoxLayout()
        button_add = QPushButton("添加链接")
        action_layout.addWidget(button_add)
        button_execute = QPushButton("开始采集")
        action_layout.addWidget(button_execute)
        bottom_layout.addLayout(action_layout)

        center_layout.addWidget(bottom_widget)

    def connect_to_database(self):
        # 数据库基本信息
        host = self.connection_host.text()
        port = self.connection_port.text()
        user = self.connection_user.text()
        pwd = self.connection_pwd.text()
        dbname = self.connection_dbname.text()

        if not host or not port or not dbname or not user or not pwd:
            self.statusBar().showMessage("主机、端口、数据库名、用户名和密码不能为空!")
            QMessageBox.critical(self, "Error", "主机、端口、数据库名、用户名和密码不能为空!")
            return

        try:
            socket.gethostbyname(host)
        except socket.error:
            self.statusBar().showMessage("无效的主机!")
            QMessageBox.critical(self, "Error", "无效的主机!")
            return
        else:
            # 主机有效
            print("有效的主机")

        # 校验端口
        try:
            port = int(port)
            if 0 < port <= 65535:
                print("有效的端口")
            else:
                QMessageBox.critical(self, "Error", "端口超出范围!")
                self.statusBar().showMessage("端口超出范围!")
                return
        except ValueError:
            QMessageBox.critical(self, "Error", "无效的端口!")
            self.statusBar().showMessage("无效的端口!")
            return
        try:
            # 连接数据库
            self.connection = pymysql.connect(host=host, port=port, user=user, password=pwd, db=dbname)
            self.cursor = self.connection.cursor()
            # 链接成功
            self.is_connect = True



            self.statusBar().showMessage("Connection succees!")
        except pymysql.Error as e:
            # 异常 连接失败
            self.is_connect = False
            QMessageBox.critical(self, "Error", str(e))
            self.statusBar().showMessage("Connection failed")

    def closeEvent(self, event):
        if self.connection:
            self.connection.close()
        event.accept()


if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = TableWidgetExample()
    window.show()
    sys.exit(app.exec())