# modules/login_page.py
import flet as ft
import logging
import tkinter as tk

class LoginPage:
    def __init__(self, page: ft.Page, logger: logging.Logger, settings_manager, db_manager, on_login_success, project_info):
        self.page = page
        self.logger = logger
        self.settings_manager = settings_manager
        self.db_manager = db_manager
        self.on_login_success = on_login_success
        self.project_info = project_info  # {'name': ..., 'window_title': ..., 'version': ..., 'authors': ...}
        self.logger.log("Initializing LoginPage...", level=logging.DEBUG)
        self.build_page()

    def build_page(self):
        # 헤더: 프로그램 제목, 버전, 제작자 정보
        self.header = ft.Container(
            content=ft.Column(
                [
                    ft.Text(self.project_info.get("window_title", "App"), style=ft.TextStyle(size=30, weight="bold"), color="black"),
                    ft.Text(f"Version {self.project_info.get('version', '0.0.0')}", style=ft.TextStyle(size=16), color="gray"),
                    ft.Text(f"제작자: {self.project_info.get('authors', '')}", style=ft.TextStyle(size=16), color="gray"),
                ],
                horizontal_alignment="center",
                spacing=5,
            ),
            padding=10,
            bgcolor="white",
            alignment=ft.alignment.center,
            border=ft.border.all(1, "lightgray"),
            border_radius=ft.border_radius.all(5),
        )

        # 로그인 폼
        self.username_field = ft.TextField(
            label="사용자 이름", width=300, on_submit=lambda e: self.password_field.focus()
        )
        self.password_field = ft.TextField(
            label="비밀번호", width=300, password=True, on_submit=lambda e: self.login(None)
        )
        self.remember_checkbox = ft.Checkbox(label="정보 저장")
        self.login_button = ft.ElevatedButton(text="로그인", on_click=self.login)
        self.message = ft.Text("", color="red")

        # 로그인 폼 컨테이너
        self.form_container = ft.Container(
            content=ft.Column(
                [
                    self.username_field,
                    self.password_field,
                    self.remember_checkbox,
                    self.login_button,
                    self.message,
                ],
                alignment="center",
                horizontal_alignment="center",
                spacing=15,
            ),
            padding=20,
            bgcolor="white",
            border=ft.border.all(1, "lightgray"),
            border_radius=ft.border_radius.all(10),
            shadow=ft.BoxShadow(blur_radius=10, spread_radius=1, offset=ft.Offset(2,2), color="gray"),
        )

        # 전체 로그인 페이지 컨텐츠 (중앙 정렬)
        self.controls = [
            ft.Container(
                content=ft.Column(
                    [
                        self.header,
                        self.form_container,
                    ],
                    spacing=20,
                    horizontal_alignment="center",
                ),
                alignment=ft.alignment.center,
                expand=True,
                bgcolor="#f0f2f5",
            )
        ]

    def login(self, e):
        self.logger.log("LoginPage.login() 호출됨", level=logging.DEBUG)
        username = self.username_field.value.strip()
        password = self.password_field.value.strip()
        if not username or not password:
            self.message.value = "사용자 이름과 비밀번호를 모두 입력하세요."
            self.page.update()
            return

        result = self.db_manager.login(username, password)
        if "error" not in result:
            self.logger.log(f"로그인 성공: {result}", level=logging.DEBUG)
            self.db_manager.update_last_login(result["id"])
            if self.remember_checkbox.value:
                user_info = {"username": username, "password": password, "id": result["id"]}
                self.settings_manager.save_user_info(user_info)
            self.message.value = "로그인 성공!"
            self.page.update()
            self.on_login_success()
        else:
            self.message.value = f"로그인 실패: {result['error']}"
            self.logger.log(f"로그인 실패: {result['error']}", level=logging.WARNING)
            self.page.update()

    def show(self):
        # 창 크기를 500×500로 설정하고 중앙 배치
        self.page.window.width = 500
        self.page.window.height = 500
        # 중앙 배치를 위해 tkinter로 화면 해상도 계산
        root = tk.Tk()
        root.withdraw()
        screen_width = root.winfo_screenwidth()
        screen_height = root.winfo_screenheight()
        root.destroy()
        self.page.window.x = int((screen_width - 500) / 2)
        self.page.window.y = int((screen_height - 500) / 2)
        if hasattr(self.page.window, "center"):
            self.page.window.center()
        self.page.controls.clear()
        for ctrl in self.controls:
            self.page.add(ctrl)
        self.page.update()