import customtkinter as ctk

from app.config import APP_SUBTITLE, APP_TITLE, MIN_HEIGHT, MIN_WIDTH, WINDOW_SIZE
from app.services import FinanceService
from app.ui.accounts_frame import AccountsFrame
from app.ui.budgets_frame import BudgetsFrame
from app.ui.categories_frame import CategoriesFrame
from app.ui.dashboard_frame import DashboardFrame
from app.ui.reports_frame import ReportsFrame
from app.ui.subscriptions_frame import SubscriptionsFrame
from app.ui.transactions_frame import TransactionsFrame


class FinanceApp(ctk.CTk):
    """Main application window and screen coordinator."""

    def __init__(self) -> None:
        super().__init__()
        self.service = FinanceService()
        self.frames: dict[str, ctk.CTkFrame] = {}
        self.nav_buttons: dict[str, ctk.CTkButton] = {}

        saved_theme = self.service.get_setting("theme", "Тёмная")
        ctk.set_appearance_mode(self._theme_to_mode(saved_theme))
        ctk.set_default_color_theme("blue")

        self.title(APP_TITLE)
        self.geometry(WINDOW_SIZE)
        self.minsize(MIN_WIDTH, MIN_HEIGHT)

        self.grid_columnconfigure(1, weight=1)
        self.grid_rowconfigure(0, weight=1)

        self.sidebar = ctk.CTkFrame(self, width=260, corner_radius=0)
        self.sidebar.grid(row=0, column=0, sticky="nsew")
        self.sidebar.grid_rowconfigure(12, weight=1)

        self.content = ctk.CTkFrame(self, fg_color="transparent")
        self.content.grid(row=0, column=1, sticky="nsew", padx=18, pady=18)
        self.content.grid_rowconfigure(0, weight=1)
        self.content.grid_columnconfigure(0, weight=1)

        self._build_sidebar(saved_theme)
        self._build_frames()
        self.show_frame("Главная")
        self.refresh_all()

    def _build_sidebar(self, saved_theme: str) -> None:
        ctk.CTkLabel(
            self.sidebar,
            text="Finance Control",
            font=ctk.CTkFont(size=26, weight="bold"),
        ).grid(row=0, column=0, padx=20, pady=(24, 4), sticky="w")

        ctk.CTkLabel(
            self.sidebar,
            text=APP_SUBTITLE,
            text_color="gray70",
            wraplength=210,
        ).grid(row=1, column=0, padx=20, pady=(0, 18), sticky="w")

        pages = [
            "Главная",
            "Счета",
            "Категории",
            "Операции",
            "Подписки",
            "Бюджеты",
            "Отчёты",
        ]
        for index, page_name in enumerate(pages, start=2):
            button = ctk.CTkButton(
                self.sidebar,
                text=page_name,
                height=44,
                anchor="w",
                command=lambda name=page_name: self.show_frame(name),
            )
            button.grid(row=index, column=0, padx=20, pady=5, sticky="ew")
            self.nav_buttons[page_name] = button

        ctk.CTkLabel(
            self.sidebar,
            text="Тема интерфейса",
            text_color="gray70",
        ).grid(row=13, column=0, padx=20, pady=(12, 6), sticky="w")

        self.theme_menu = ctk.CTkOptionMenu(
            self.sidebar,
            values=["Тёмная", "Светлая", "Системная"],
            command=self.change_theme,
        )
        self.theme_menu.set(saved_theme)
        self.theme_menu.grid(row=14, column=0, padx=20, pady=(0, 20), sticky="ew")

    def _build_frames(self) -> None:
        self.frames = {
            "Главная": DashboardFrame(self.content, self.refresh_all),
            "Счета": AccountsFrame(self.content, self.refresh_all),
            "Категории": CategoriesFrame(self.content, self.refresh_all),
            "Операции": TransactionsFrame(self.content, self.refresh_all),
            "Подписки": SubscriptionsFrame(self.content, self.refresh_all),
            "Бюджеты": BudgetsFrame(self.content, self.refresh_all),
            "Отчёты": ReportsFrame(self.content, self.refresh_all),
        }
        for frame in self.frames.values():
            frame.grid(row=0, column=0, sticky="nsew")

    def show_frame(self, name: str) -> None:
        frame = self.frames[name]
        if hasattr(frame, "refresh_data"):
            frame.refresh_data()
        frame.tkraise()
        self._highlight_nav_button(name)

    def refresh_all(self) -> None:
        for frame in self.frames.values():
            if hasattr(frame, "refresh_data"):
                frame.refresh_data()

    def _highlight_nav_button(self, active_name: str) -> None:
        for name, button in self.nav_buttons.items():
            if name == active_name:
                button.configure(fg_color=("#2563eb", "#2563eb"))
            else:
                button.configure(fg_color=("#3b8ed0", "#1f6aa5"))

    def change_theme(self, theme_name: str) -> None:
        ctk.set_appearance_mode(self._theme_to_mode(theme_name))
        self.service.set_setting("theme", theme_name)

    @staticmethod
    def _theme_to_mode(theme_name: str) -> str:
        theme_map = {
            "Тёмная": "dark",
            "Светлая": "light",
            "Системная": "system",
        }
        return theme_map.get(theme_name, "dark")