from PySide6.QtWidgets import QMessageBox
from PySide6.QtCore import Qt
from ui.login_ui import LoginUI
from utils.version_manager import VersionManager
from widgets.main_window import MainWindow
from utils.sql_utils import SQLUtils
import logging
import threading
from utils.app_mode import AppMode

def check_user_login(user_id, password):
    """验证用户登录"""
    try:
        if AppMode.is_api():
            db = SQLUtils(source_name='postgresql')
            db.execute_query("select user_id from x_userinfo t1 where t1.user_id = %s and t1.user_pwd = md5(%s)", (user_id, password))
            result = db.fetchone()
            db.close()
            return result is not None
        # 始终使用SQLite数据源验证登录
        db = SQLUtils(source_name='sqlite')
        db.execute_query("SELECT id FROM wsbz_user WHERE username = ? AND password = ? AND is_deleted = 0", (user_id, password))
        result = db.fetchone()
        db.close()
        return result is not None
    except Exception as e:
        logging.error(f"登录验证出错: {e}")
        return False

def get_user_info(user_id):
    """获取用户信息"""
    try:
        if AppMode.is_api():
            db = SQLUtils(source_name='postgresql')
            db.execute_query("select t1.user_id,t1.user_name,t2.corp_name,t1.corp_id from x_userinfo t1 left join x_corp t2 on t1.corp_id = t2.corp_id where user_id = %s", (user_id,))
            result = db.fetchone()
            db.close()
            return result
        # 始终使用SQLite数据源获取用户信息
        db = SQLUtils(source_name='sqlite')
        db.execute_query("SELECT userid, username,  corp_id as corp_name, corp_id FROM wsbz_user WHERE username = ?", (user_id,))
        result = db.fetchone()
        db.close()
        if result:
            return result
        return user_id, "未知公司", 0, 0
    except Exception as e:
        logging.error(f"获取用户信息出错: {e}")
        return user_id, "未知公司", 0, 0

class LoginWidget(LoginUI):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.btn_login.clicked.connect(self.handle_login)
        self.btn_close.clicked.connect(self.close)
        
        # 添加回车键支持
        self.edit_user.returnPressed.connect(self.handle_login)
        self.edit_pwd.returnPressed.connect(self.handle_login)
        
        # 显示版本号
        self.version_label.setText(f"版本: {VersionManager.get_current_version()}")
        
        # 在单独的线程中检查更新，避免阻塞UI
        # self.check_update_thread = threading.Thread(target=self.check_for_updates)
        # self.check_update_thread.daemon = True
        # self.check_update_thread.start()
        
    def check_for_updates(self):
        """在后台线程中检查更新"""
        try:
            # 检查更新并提示用户
            VersionManager.check_and_prompt_update(self)
        except Exception as e:
            logging.error(f"检查更新时发生错误: {e}")
        
    # 登录按钮点击事件
    def handle_login(self):
        user_id = self.edit_user.text().strip()
        password = self.edit_pwd.text().strip()
        if not user_id or not password:
            QMessageBox.warning(self, "提示", "请输入工号和密码！")
            return
        if check_user_login(user_id, password):
            try:
                user_id, user_name, corp_name, corp_id = get_user_info(user_id)
                if not corp_name:
                    corp_name = "未知公司"
                self.hide()
                
                # 使用异常处理确保主窗口创建失败不会导致整个应用程序崩溃
                try:
                    import logging
                    logging.info(f"正在创建主窗口，用户ID: {user_id}, 姓名: {user_name}, 公司: {corp_name}")
                    self.main_window = MainWindow(user_id, user_name, corp_name, corp_id)
                    self.main_window.showMaximized()  # 窗口最大化显示
                    logging.info("主窗口已显示（最大化）")
                except Exception as e:
                    logging.critical(f"创建或显示主窗口时发生错误: {e}", exc_info=True)
                    QMessageBox.critical(self, "系统错误", f"打开主窗口时发生错误: {e}\n请联系管理员")
                    self.show()  # 如果主窗口创建失败，重新显示登录窗口
            except Exception as e:
                import logging
                logging.critical(f"处理登录信息时发生错误: {e}", exc_info=True)
                QMessageBox.critical(self, "系统错误", f"处理登录信息时发生错误: {e}\n请联系管理员")
                self.show()  # 确保用户可以重新尝试登录
        else:
            QMessageBox.warning(self, "登录失败", "工号或密码错误！")