# -*- coding: utf-8 -*-
"""
Mega Water - 离线授权发卡器 (开发者专用)
生成绑定特定机器码的 .lic 授权文件
"""

import os
import sys

# 确保 src.auth 在 path 中
_current_dir = os.path.dirname(os.path.abspath(__file__))
_project_root = os.path.abspath(os.path.join(_current_dir, "..", ".."))
if _project_root not in sys.path:
    sys.path.insert(0, _project_root)

from PyQt5.QtWidgets import (
    QWidget, QVBoxLayout, QHBoxLayout, QLabel, QLineEdit,
    QPushButton, QFileDialog, QMessageBox, QApplication, QDateEdit, QCheckBox
)
from PyQt5.QtCore import Qt, QDate

from src.auth.license_manager import generate_license

# 永久授权的标识日期
PERMANENT_EXPIRY = "2099-12-31"


class LicenseKeygenWindow(QWidget):
    """授权发卡器主窗口"""

    def __init__(self):
        super().__init__()
        self.setWindowTitle("Mega Water - 离线授权发卡器 (开发者专用)")
        self.setMinimumSize(640, 360)
        self.move(400, 280)

        self._default_save_path = os.path.join(_project_root, "license.lic")
        self._setup_ui()

    def _setup_ui(self):
        # ── 全局字体：无衬线，清晰 ──
        font_family = "Microsoft YaHei" if sys.platform == "win32" else "Segoe UI"
        self.setStyleSheet(f"""
            * {{
                font-family: {font_family}, 'Segoe UI', sans-serif;
                font-size: 11pt;
            }}
            QLabel#titleLabel {{
                font-size: 16pt;
                font-weight: bold;
                color: #2c3e50;
            }}
            QLabel#tipLabel {{
                font-size: 10pt;
                color: #95a5a6;
            }}
        """)

        main_layout = QVBoxLayout()
        main_layout.setContentsMargins(45, 40, 45, 40)
        main_layout.setSpacing(18)

        # ── 标题 ──
        title_label = QLabel("离线授权发卡器 (开发者专用)")
        title_label.setObjectName("titleLabel")
        title_label.setAlignment(Qt.AlignCenter)
        main_layout.addWidget(title_label)

        # ── 机器码输入行 ──
        mc_layout = QHBoxLayout()
        mc_layout.setSpacing(12)
        mc_label = QLabel("机器码：")
        mc_label.setFixedWidth(90)
        self.mc_input = QLineEdit()
        self.mc_input.setPlaceholderText("粘贴用户发来的 32 位机器码")
        self.mc_input.setMinimumHeight(36)
        self.mc_input.setMinimumWidth(400)
        mc_layout.addWidget(mc_label, 0)
        mc_layout.addWidget(self.mc_input, 1)
        main_layout.addLayout(mc_layout)

        # ── 到期时间选择行 ──
        exp_layout = QHBoxLayout()
        exp_layout.setSpacing(14)
        exp_label = QLabel("到期时间：")
        exp_label.setFixedWidth(90)
        self.exp_edit = QDateEdit()
        self.exp_edit.setCalendarPopup(True)
        self.exp_edit.setMinimumHeight(36)
        self.exp_edit.setMinimumWidth(160)
        self.exp_edit.setDate(QDate.currentDate().addYears(1))

        self.perm_check = QCheckBox("永久授权 (不限时)")
        self.perm_check.setMinimumHeight(36)
        self.perm_check.stateChanged.connect(self._on_perm_changed)

        exp_layout.addWidget(exp_label, 0)
        exp_layout.addWidget(self.exp_edit, 0)
        exp_layout.addWidget(self.perm_check, 0)
        exp_layout.addStretch(1)
        main_layout.addLayout(exp_layout)

        # ── 保存路径行 ──
        path_layout = QHBoxLayout()
        path_layout.setSpacing(12)
        path_label = QLabel("保存路径：")
        path_label.setFixedWidth(90)
        self.path_input = QLineEdit()
        self.path_input.setReadOnly(True)
        self.path_input.setMinimumHeight(36)
        self.browse_btn = QPushButton("浏览...")
        self.browse_btn.setMinimumHeight(36)
        self.browse_btn.setFixedWidth(80)
        self.browse_btn.clicked.connect(self._on_browse)
        path_layout.addWidget(path_label, 0)
        path_layout.addWidget(self.path_input, 1)
        path_layout.addWidget(self.browse_btn, 0)
        main_layout.addLayout(path_layout)

        # ── 弹性空间 ──
        main_layout.addSpacing(10)

        # ── 生成按钮 ──
        self.gen_btn = QPushButton("生成授权文件 (.lic)")
        self.gen_btn.setMinimumHeight(48)
        self.gen_btn.setStyleSheet("""
            QPushButton {
                background-color: #27ae60;
                color: white;
                font-size: 13pt;
                font-weight: bold;
                border: none;
                border-radius: 8px;
            }
            QPushButton:hover {
                background-color: #2ecc71;
            }
            QPushButton:pressed {
                background-color: #1e8449;
            }
        """)
        self.gen_btn.clicked.connect(self._on_generate)
        main_layout.addWidget(self.gen_btn)

        # ── 底部提示 ──
        tip_label = QLabel("生成后请将 license.lic 文件发给用户，放置到软件安装目录下即可。")
        tip_label.setObjectName("tipLabel")
        tip_label.setAlignment(Qt.AlignCenter)
        main_layout.addWidget(tip_label)

        self.setLayout(main_layout)

    def _on_perm_changed(self, state):
        """永久授权复选框状态变化时，联动日期选择器"""
        if state == Qt.Checked:
            self.exp_edit.setEnabled(False)
        else:
            self.exp_edit.setEnabled(True)

    def _on_browse(self):
        """打开文件对话框选择保存路径"""
        path, _ = QFileDialog.getSaveFileName(
            self,
            "选择授权文件保存位置",
            self._default_save_path,
            "授权文件 (*.lic)"
        )
        if path:
            if not path.lower().endswith(".lic"):
                path += ".lic"
            self.path_input.setText(path)

    def _on_generate(self):
        """点击生成按钮，调用授权管理器"""
        machine_code = self.mc_input.text().strip()
        if not machine_code:
            QMessageBox.warning(self, "输入错误", "请输入机器码")
            return

        output_path = self.path_input.text().strip()
        if not output_path:
            QMessageBox.warning(self, "输入错误", "请设置保存路径")
            return

        # 根据是否勾选永久授权决定日期
        if self.perm_check.isChecked():
            expiry_date = PERMANENT_EXPIRY
        else:
            expiry_date = self.exp_edit.date().toString("yyyy-MM-dd")

        ok, msg = generate_license(
            machine_code=machine_code,
            output_path=output_path,
            expiry_date=expiry_date
        )

        if ok:
            QMessageBox.information(
                self,
                "生成成功",
                f"✅ 授权文件已成功生成！\n\n保存路径：\n{output_path}\n\n请将此文件发给用户即可。",
                QMessageBox.Ok
            )
        else:
            QMessageBox.critical(
                self,
                "生成失败",
                f"❌ {msg}",
                QMessageBox.Ok
            )


if __name__ == "__main__":
    # ── 高 DPI 自适应（必须放在 QApplication 实例化之前）──
    from PyQt5.QtCore import Qt
    QApplication.setAttribute(Qt.AA_EnableHighDpiScaling, True)
    QApplication.setAttribute(Qt.AA_UseHighDpiPixmaps, True)

    app = QApplication(sys.argv)
    app.setApplicationName("LicenseKeygen")
    window = LicenseKeygenWindow()
    window.show()
    sys.exit(app.exec_())