import sys
from PySide6.QtWidgets import (
    QApplication,
    QMainWindow,
    QWidget,
    QVBoxLayout,
    QHBoxLayout,
    QLabel,
    QLineEdit,
    QPushButton,
    QMessageBox,
    QFrame,
    QSizePolicy,
)
from PySide6.QtCore import Qt, QTimer, QPoint, QRectF
from PySide6.QtGui import (
    QFont,
    QCursor,
    QPixmap,
    QImage,
    QRegion,
    QPainterPath,
    QPainter,
    QColor,
)


class LoginWindow(QMainWindow):
    """登录窗口类，优化宽高比例和布局美观度"""

    def __init__(self, use_dark_theme=False):
        super().__init__()

        # 浅色主题样式表
        # 后期写入 .qss 文件
        self.light_style = """
            QMainWindow, QWidget {
                background-color: #ffffff;
            }
            QLabel#titleLabel {
                font-weight: bold;
                color: #2C3E50;  /* 工业灰 */
            }
            QLabel#subtitleLabel {
                font-size: 16px;
                color: #5f6368;
            }
            QLabel#normalLabel {
                font-size: 14px;
                color: #5f6368;
            }
            QLabel#linkLabel {
                font-size: 14px;
                color: #1a73e8;
                text-decoration: underline;
                background: transparent;
                border: none;
            }
            QLabel#hintLabel {
                font-size: 16px;
                color: white;         
                background-color: #4caf50;
                border-radius: 8px;    
                padding: 3px 16px;   
                min-height: 29px;
                min-width: 106px;
                max-width: 300px;
                border: none;
                text-align: center;    
            }
            QLineEdit {
                padding: 10px;
                border: 1px solid #dadce0;
                border-radius: 6px;
                font-size: 14px;
                background-color: white;
                color: #202124;
            }
            QLineEdit:focus {
                border: 2px solid #1A1A1A;  
                border-radius: 8px;
                padding: 4px;  
            }
            QLineEdit::placeholder {
                color: #424242; 
            }
            QPushButton {
                background-color: #1a73e8;
                color: white;
                padding: 10px;
                border-radius: 6px;
                font-size: 16px;
                font-weight: 500;
            }
            QPushButton:hover {
                background-color: #1765cc;
            }
            QPushButton:pressed {
                background-color: #165dba;
            }
            QFrame#loginFrame {
                background-color: white;
                border-top-right-radius: 8px;     
                border-bottom-right-radius: 8px;
                border: 1px solid #e0e0e0;
                min-width: 600px;
                min-height: 360px;
                max-width: 900px;  
                max-height: 460px;
            }
            QWidget#formWidget {  
                background-color: #f8f9fa;
                border-top-left-radius: 0px;      
                border-bottom-left-radius: 0px;   
                border-top-right-radius: 8px;     
                border-bottom-right-radius: 8px;  
            }
            QLabel#loginTitleLabel {
                font-size: 24px;        
                color: #333333;         
                margin-bottom: 16px;
                background-color: #f8f9fa;
            }
        """

        # 深色主题样式表
        self.dark_style = """
            QMainWindow, QWidget {
                background-color: #1a1a1a;
            }
            QLabel#titleLabel {
                font-weight: bold;
                color: white;
            }
            QLabel#subtitleLabel {
                font-size: 16px;
                color: #d0d0d0;
            }
            QLabel#normalLabel {
                font-size: 14px;
                color: #d0d0d0;
            }
            QLabel#linkLabel {
                font-size: 14px;
                color: #8ab4f8;
                text-decoration: underline;
                background: transparent;
                border: none;
            }
            QLabel#hintLabel {
                font-size: 16px;
                color: white;         
                background-color: #4caf50;
                border-radius: 8px;    
                padding: 3px 16px;   
                min-height: 29px;
                min-width: 106px;
                max-width: 300px;
                border: none;
                text-align: center;    
            }
            QLineEdit {
                padding: 10px;
                border: 1px solid #444444;
                border-radius: 6px;
                font-size: 14px;
                background-color: #333333;
                color: #e0e0e0;
            }
            QLineEdit:focus {
                border: 2px solid #8ab4f8;
                outline: none;
            }
            QPushButton {
                background-color: #1a73e8;
                color: white;
                padding: 10px;
                border-radius: 6px;
                font-size: 16px;
                font-weight: 500;
            }
            QPushButton:hover {
                background-color: #2962ff;
            }
            QPushButton:pressed {
                background-color: #1565c0;
            }
            QFrame#loginFrame {
                background-color: #2d2d2d;
                border: 1px solid #444444;
                border-top-right-radius: 8px;     
                border-bottom-right-radius: 8px;
                min-width: 600px;
                min-height: 360px;
                max-width: 900px;  
                max-height: 460px;
            }
            QWidget#formWidget {  
                background-color: #e9e9e9;
                border-top-left-radius: 0px;      
                border-bottom-left-radius: 0px;   
                border-top-right-radius: 8px;     
                border-bottom-right-radius: 8px;  
            }
            QLabel#loginTitleLabel {
                font-size: 24px;        
                color: #333333;         
                margin-bottom: 16px;
                background-color: #e9e9e9;
            }
        """

        # 可以根据不同的主题，设置不同的样式表
        if use_dark_theme:
            self.setStyleSheet(self.dark_style)
        else:
            self.setStyleSheet(self.light_style)

        self.init_ui()

    def init_ui(self):
        self.setWindowTitle("密胺餐盘自动化生产控制系统")
        self.resize(900, 600)  # 3:2比例（900/600=1.5）
        self.setMinimumSize(750, 500)  # 最小尺寸保持3:2比例

        # 创建中心部件和主布局
        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        main_layout = QVBoxLayout(central_widget)
        main_layout.setContentsMargins(50, 10, 50, 50)
        main_layout.setSpacing(15)

        # 提示信息容器
        hint_container = QWidget()
        hint_container.setFixedHeight(50)
        hint_layout = QHBoxLayout(hint_container)
        hint_layout.setContentsMargins(0, 0, 0, 0)
        hint_layout.setAlignment(Qt.AlignCenter)

        self.hint_label = QLabel("密码: 123")
        self.hint_label.setObjectName("hintLabel")
        self.hint_label.setAlignment(Qt.AlignHCenter | Qt.AlignVCenter)
        self.hint_label.setVisible(False)
        hint_layout.addWidget(self.hint_label)
        main_layout.addWidget(hint_container)

        # 系统标题（随窗口动态缩放）
        self.title_label = QLabel("密胺餐盘自动化生产控制系统")
        self.title_label.setObjectName("titleLabel")
        self.title_label.setAlignment(Qt.AlignCenter)
        main_layout.addWidget(self.title_label)

        # 系统描述
        subtitle_label = QLabel("高效、安全的自动化控制系统")
        subtitle_label.setObjectName("subtitleLabel")
        subtitle_label.setAlignment(Qt.AlignCenter)
        subtitle_label.setFixedHeight(25)
        main_layout.addWidget(subtitle_label)
        main_layout.addSpacing(20)

        # ---------------- 登录框：左图 + 右表单 ----------------
        # -------- 登录框 占比：左图（1份） + 右表单（1份） --------
        login_frame = QFrame()
        login_frame.setObjectName("loginFrame")
        login_layout = QHBoxLayout(login_frame)
        login_layout.setSpacing(0)  # 左右紧贴，无间距
        login_layout.setContentsMargins(0, 0, 0, 0)  # 左上右下内边距为0

        # -------- 左侧图片区域（占1份宽度） --------
        self.image_label = QLabel()
        self.image_label.setSizePolicy(
            QSizePolicy.Expanding, QSizePolicy.Expanding  # 水平拉伸  # 垂直拉伸
        )
        self.image_label.setAlignment(Qt.AlignCenter)

        # 加载左侧图片（png图片）
        image_path = r".\resource\login.png"
        pixmap = QPixmap(image_path)
        if not pixmap.isNull():
            self.image_label.setPixmap(pixmap)
            self.image_label.setScaledContents(True)  # 填充容器，保持比例
        else:
            self.image_label.setText("图片加载失败")
            self.image_label.setStyleSheet("font-size: 14px; color: #888;")

        login_layout.addWidget(self.image_label, stretch=1)  # 图片占1份

        # -------- 右侧表单区域（占2份宽度，内容居中） --------
        form_widget = QWidget()
        form_widget.setObjectName("formWidget")
        form_widget.setContentsMargins(30, 30, 30, 30)

        form_layout = QVBoxLayout(form_widget)
        form_layout.setSpacing(25)
        form_layout.setContentsMargins(0, 0, 0, 0)  # 上左下右内边距为0
        form_layout.setAlignment(Qt.AlignCenter)  # 表单内容居中

        self.login_title_label = QLabel("Sign In")  # 登录标题文本
        self.login_title_label.setObjectName("loginTitleLabel")

        # 账号输入
        self.username_input = QLineEdit()
        self.username_input.setPlaceholderText("请输入账号")
        self.username_input.setText("manager")
        self.username_input.setFixedWidth(250)  # 固定宽度，避免过度拉伸

        # 密码输入
        self.password_input = QLineEdit()
        self.password_input.setPlaceholderText("请输入密码")
        self.password_input.setEchoMode(QLineEdit.Password)
        self.password_input.setFixedWidth(250)

        # 登录按钮
        self.login_btn = QPushButton("登录")
        self.login_btn.clicked.connect(self.validate_login)  # 用户登录验证
        self.login_btn.setMinimumWidth(120)
        self.login_btn.setMaximumWidth(200)
        # 登录按钮样式
        self.login_btn.setStyleSheet(
            """
        QPushButton {
            background-color: #4A6FA5;
            color: white;
            padding: 6px 10px;
            border-radius: 15px;  
            font-size: 16px;
            font-weight: 550;
            min-height: 24px;    
            max-height: 32px; 
        }
        QPushButton:hover {
            background-color: #3D5D8A;
        }
        QPushButton:pressed {
            background-color: #304C70;
        }
        """
        )

        # 忘记密码链接
        forgot_layout = QHBoxLayout()
        forgot_layout.setAlignment(Qt.AlignCenter)  # 忘记密码居中
        self.forgot_password = QLabel("忘记密码")
        self.forgot_password.setObjectName("linkLabel")
        self.forgot_password.setTextInteractionFlags(Qt.TextSelectableByMouse)
        self.forgot_password.setCursor(QCursor(Qt.PointingHandCursor))
        self.forgot_password.mousePressEvent = self.show_password_hint
        forgot_layout.addWidget(self.forgot_password)
        # forgot_layout.addStretch()

        # 组装表单布局
        # 添加到布局时显式指定水平居中
        form_layout.addWidget(self.login_title_label, alignment=Qt.AlignHCenter)
        form_layout.addWidget(self.username_input, alignment=Qt.AlignHCenter)
        form_layout.addWidget(self.password_input, alignment=Qt.AlignHCenter)
        form_layout.addWidget(self.login_btn, alignment=Qt.AlignHCenter)
        form_layout.addLayout(forgot_layout)

        login_layout.addWidget(form_widget, stretch=1)  # 表单占1份

        # -------- 登录框加入主布局 --------
        center_layout = QHBoxLayout()  # 使登录框居中显示
        center_layout.addStretch(2)
        center_layout.addWidget(login_frame, stretch=3)  # 登录框整体占3份
        center_layout.addStretch(2)
        main_layout.addLayout(center_layout, stretch=2)
        main_layout.addStretch(1)

        # 默认选中密码框
        self.password_input.setFocus()

        # 提示定时器
        self.hint_timer = QTimer(self)
        self.hint_timer.setSingleShot(True)
        self.hint_timer.timeout.connect(self.hide_password_hint)

        # 初始化标题大小
        self.adjust_title_size()

    def adjust_title_size(self):
        """调整标题大小，适应新的宽高比例"""
        window_width = self.width()
        font_size = max(20, min(36, window_width // 60))  # 除数增大，字体增长更平缓
        font = QFont()
        font.setPointSize(font_size)
        self.title_label.setFont(font)

    def resizeEvent(self, event):
        """窗口大小改变时调整标题"""
        super().resizeEvent(event)
        self.adjust_title_size()

    def toggle_theme(self):
        """切换主题"""
        current_style = self.styleSheet()
        if current_style == self.light_style:
            self.setStyleSheet(self.dark_style)
        else:
            self.setStyleSheet(self.light_style)

    def show_password_hint(self, event):
        self.hint_label.setVisible(True)
        self.hint_timer.start(3000)

    def hide_password_hint(self):
        self.hint_label.setVisible(False)

    # 目前写死，密码都是123
    # 后续 可以从数据库读入
    def validate_login(self):
        username = self.username_input.text().strip()
        password = self.password_input.text().strip()

        if password != "123":
            QMessageBox.warning(self, "登录失败", "密码错误，请重试！")
            return

        # 根据登录的用户的不同，跳转到不同的界面
        if username == "manager":
            self.open_workshop_manager_interface()
        elif username == "admin":
            self.open_debugger_interface()
        else:
            QMessageBox.warning(self, "登录失败", "用户名不存在！")
            return

    # 测试界面接口一
    def open_workshop_manager_interface(self):
        current_style = self.styleSheet()
        self.workshop_window = WorkshopManagerWindow(current_style)
        self.workshop_window.show()
        self.close()

    # 测试界面接口二
    def open_debugger_interface(self):
        current_style = self.styleSheet()
        self.debugger_window = DebuggerWindow(current_style)
        self.debugger_window.show()
        self.close()


class WorkshopManagerWindow(QMainWindow):
    def __init__(self, style_sheet):
        super().__init__()
        self.setStyleSheet(style_sheet)
        self.init_ui()

    def init_ui(self):
        self.setWindowTitle("车间主管控制台 - 密胺餐盘自动化生产控制系统")
        self.resize(1050, 700)  # 3:2比例
        self.setMinimumSize(900, 600)

        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        layout = QVBoxLayout(central_widget)

        title_label = QLabel("欢迎使用车间主管系统")
        title_label.setObjectName("titleLabel")
        title_label.setAlignment(Qt.AlignCenter)
        title_label.setFont(QFont("Arial", 18, QFont.Bold))

        info_label = QLabel("这里是密胺餐盘生产线的管理和监控功能界面")
        info_label.setObjectName("normalLabel")
        info_label.setAlignment(Qt.AlignCenter)

        layout.addStretch()
        layout.addWidget(title_label)
        layout.addWidget(info_label)
        layout.addStretch()


class DebuggerWindow(QMainWindow):
    def __init__(self, style_sheet):
        super().__init__()
        self.setStyleSheet(style_sheet)
        self.init_ui()

    def init_ui(self):
        self.setWindowTitle("调试人员控制台 - 密胺餐盘自动化生产控制系统")
        self.resize(1050, 700)  # 3:2比例
        self.setMinimumSize(900, 600)

        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        layout = QVBoxLayout(central_widget)

        title_label = QLabel("欢迎使用调试人员系统")
        title_label.setObjectName("titleLabel")
        title_label.setAlignment(Qt.AlignCenter)
        title_label.setFont(QFont("Arial", 18, QFont.Bold))

        info_label = QLabel("这里是密胺餐盘生产设备的调试和参数配置界面")
        info_label.setObjectName("normalLabel")
        info_label.setAlignment(Qt.AlignCenter)

        layout.addStretch()
        layout.addWidget(title_label)
        layout.addWidget(info_label)
        layout.addStretch()


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