import sqlite3
from tkinter import messagebox

import customtkinter as ctk

from app.database import get_connection


class AccountsFrame(ctk.CTkFrame):
    def __init__(self, master, refresh_callback) -> None:
        super().__init__(master)
        self.refresh_callback = refresh_callback

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

        self._build_form()
        self._build_list()

    def _build_form(self) -> None:
        form_frame = ctk.CTkFrame(self, corner_radius=18)
        form_frame.grid(row=0, column=0, sticky="ns", padx=(8, 12), pady=8)

        title = ctk.CTkLabel(
            form_frame,
            text="Счета и карты",
            font=ctk.CTkFont(size=26, weight="bold"),
        )
        title.pack(anchor="w", padx=18, pady=(18, 6))

        subtitle = ctk.CTkLabel(
            form_frame,
            text="Добавьте карту, кошелёк или наличные.",
            text_color="gray75",
        )
        subtitle.pack(anchor="w", padx=18, pady=(0, 18))

        self.name_entry = ctk.CTkEntry(
            form_frame,
            width=280,
            placeholder_text="Название",
        )
        self.name_entry.pack(padx=18, pady=8)

        self.type_menu = ctk.CTkOptionMenu(
            form_frame,
            width=280,
            values=["Карта", "Наличные", "Счёт", "Электронный кошелёк"],
        )
        self.type_menu.pack(padx=18, pady=8)
        self.type_menu.set("Карта")

        self.balance_entry = ctk.CTkEntry(
            form_frame,
            width=280,
            placeholder_text="Стартовый баланс",
        )
        self.balance_entry.pack(padx=18, pady=8)

        add_button = ctk.CTkButton(
            form_frame,
            text="Добавить счёт",
            width=280,
            height=42,
            command=self.add_account,
        )
        add_button.pack(padx=18, pady=(12, 18))

    def _build_list(self) -> None:
        self.list_frame = ctk.CTkScrollableFrame(self, label_text="Список счетов")
        self.list_frame.grid(row=0, column=1, sticky="nsew", padx=(0, 8), pady=8)

    def add_account(self) -> None:
        name = self.name_entry.get().strip()
        account_type = self.type_menu.get()
        balance_text = self.balance_entry.get().strip().replace(",", ".")

        if not name or not balance_text:
            messagebox.showerror("Ошибка", "Заполните все поля.")
            return

        try:
            balance = float(balance_text)
        except ValueError:
            messagebox.showerror("Ошибка", "Баланс должен быть числом.")
            return

        with get_connection() as connection:
            connection.execute(
                """
                INSERT INTO accounts (name, account_type, balance)
                VALUES (?, ?, ?)
                """,
                (name, account_type, balance),
            )
            connection.commit()

        self.name_entry.delete(0, "end")
        self.balance_entry.delete(0, "end")
        self.refresh_callback()

    def delete_account(self, account_id: int) -> None:
        try:
            with get_connection() as connection:
                connection.execute("DELETE FROM accounts WHERE id = ?", (account_id,))
                connection.commit()
        except sqlite3.IntegrityError:
            messagebox.showerror(
                "Ошибка",
                "Нельзя удалить счёт, пока к нему привязаны операции.",
            )
            return

        self.refresh_callback()

    def refresh_data(self) -> None:
        for widget in self.list_frame.winfo_children():
            widget.destroy()

        with get_connection() as connection:
            accounts = connection.execute(
                "SELECT * FROM accounts ORDER BY id DESC"
            ).fetchall()

        if not accounts:
            empty_label = ctk.CTkLabel(
                self.list_frame,
                text="Пока нет ни одного счёта.",
                text_color="gray70",
            )
            empty_label.pack(anchor="w", padx=10, pady=10)
            return

        for account in accounts:
            card = ctk.CTkFrame(self.list_frame, corner_radius=16)
            card.pack(fill="x", padx=6, pady=6)

            title = ctk.CTkLabel(
                card,
                text=account["name"],
                font=ctk.CTkFont(size=18, weight="bold"),
            )
            title.grid(row=0, column=0, sticky="w", padx=16, pady=(12, 6))

            delete_button = ctk.CTkButton(
                card,
                text="Удалить",
                width=90,
                fg_color="#b33939",
                hover_color="#932f2f",
                command=lambda account_id=account["id"]: self.delete_account(account_id),
            )
            delete_button.grid(row=0, column=1, sticky="e", padx=16, pady=(12, 6))

            info = ctk.CTkLabel(
                card,
                text=(
                    f"Тип: {account['account_type']} | Баланс: "
                    f"{account['balance']:,.2f} ₽"
                ).replace(",", " "),
                text_color="gray75",
            )
            info.grid(row=1, column=0, columnspan=2, sticky="w", padx=16, pady=(0, 14))