"""Виджет календаря"""
import tkinter as tk
from tkinter import ttk
import calendar
from datetime import datetime
from app.config import Config


class CalendarWidget(tk.Frame):
    """Кастомный виджет календаря"""

    def __init__(self, parent, db, on_date_select=None):
        super().__init__(parent, bg=Config.COLORS['calendar_bg'])
        self.db = db
        self.on_date_select = on_date_select

        self.current_date = datetime.now()
        self.selected_date = datetime.now()

        self.create_widgets()
        self.update_calendar()

    def create_widgets(self):
        # Заголовок с месяцем и годом
        self.header_frame = tk.Frame(self, bg=Config.COLORS['calendar_bg'])
        self.header_frame.pack(fill='x', pady=(10, 5))

        self.prev_btn = tk.Button(
            self.header_frame,
            text="◀",
            command=self.prev_month,
            bg=Config.COLORS['calendar_bg'],
            fg=Config.COLORS['fg'],
            relief='flat',
            font=('Arial', 12),
            cursor='hand2'
        )
        self.prev_btn.pack(side='left', padx=(20, 0))

        self.month_label = tk.Label(
            self.header_frame,
            text="",
            bg=Config.COLORS['calendar_bg'],
            fg=Config.COLORS['calendar_header'],
            font=('Arial', 14, 'bold')
        )
        self.month_label.pack(side='left', expand=True)

        self.next_btn = tk.Button(
            self.header_frame,
            text="▶",
            command=self.next_month,
            bg=Config.COLORS['calendar_bg'],
            fg=Config.COLORS['fg'],
            relief='flat',
            font=('Arial', 12),
            cursor='hand2'
        )
        self.next_btn.pack(side='right', padx=(0, 20))

        # Дни недели
        days_frame = tk.Frame(self, bg=Config.COLORS['calendar_bg'])
        days_frame.pack(fill='x', padx=5, pady=5)

        days = ['Пн', 'Вт', 'Ср', 'Чт', 'Пт', 'Сб', 'Вс']
        for i, day in enumerate(days):
            days_frame.grid_columnconfigure(i, weight=1)
            tk.Label(
                days_frame,
                text=day,
                bg=Config.COLORS['calendar_bg'],
                fg=Config.COLORS['fg'],
                font=('Arial', 9, 'bold')
            ).grid(row=0, column=i)

        # Сетка календаря
        self.calendar_frame = tk.Frame(self, bg=Config.COLORS['calendar_bg'])
        self.calendar_frame.pack(fill='both', expand=True, padx=5, pady=5)

        self.day_buttons = []
        for row in range(6):
            self.calendar_frame.grid_rowconfigure(row, weight=1)
            for col in range(7):
                self.calendar_frame.grid_columnconfigure(col, weight=1)
                btn = tk.Label(
                    self.calendar_frame,
                    text="",
                    bg=Config.COLORS['calendar_bg'],
                    fg=Config.COLORS['fg'],
                    font=('Arial', 10),
                    cursor='hand2'
                )
                btn.grid(row=row, column=col, sticky='nsew', padx=1, pady=1)
                btn.bind('<Button-1>', lambda e, r=row, c=col: self.on_day_click(r, c))
                self.day_buttons.append(btn)

    def update_calendar(self):
        year = self.current_date.year
        month = self.current_date.month

        # Обновляем заголовок
        months = ['Январь', 'Февраль', 'Март', 'Апрель', 'Май', 'Июнь',
                  'Июль', 'Август', 'Сентябрь', 'Октябрь', 'Ноябрь', 'Декабрь']
        self.month_label.config(text=f"{months[month - 1]} {year}")

        # Получаем дни с заметками
        days_with_notes = self.db.get_dates_with_notes(year, month)

        # Создаем календарь
        cal = calendar.monthcalendar(year, month)

        for idx, btn in enumerate(self.day_buttons):
            row = idx // 7
            col = idx % 7

            if row < len(cal) and col < len(cal[row]):
                day = cal[row][col]
                if day != 0:
                    btn.config(text=str(day))

                    # Определяем цвет фона
                    today = datetime.now()
                    is_today = (day == today.day and
                                month == today.month and
                                year == today.year)

                    is_selected = (day == self.selected_date.day and
                                   month == self.selected_date.month and
                                   year == self.selected_date.year)

                    has_notes = day in days_with_notes

                    if is_today and is_selected:
                        btn.config(
                            bg=Config.COLORS['today_bg'],
                            fg=Config.COLORS['fg']
                        )
                    elif is_today:
                        btn.config(
                            bg=Config.COLORS['today_bg'],
                            fg=Config.COLORS['fg']
                        )
                    elif is_selected:
                        btn.config(
                            bg=Config.COLORS['accent'],
                            fg=Config.COLORS['fg']
                        )
                    elif has_notes:
                        btn.config(
                            bg='#5a7a3a',
                            fg=Config.COLORS['fg']
                        )
                    else:
                        btn.config(
                            bg=Config.COLORS['calendar_bg'],
                            fg=Config.COLORS['fg']
                        )
                else:
                    btn.config(text="", bg=Config.COLORS['calendar_bg'])
            else:
                btn.config(text="", bg=Config.COLORS['calendar_bg'])

    def prev_month(self):
        if self.current_date.month == 1:
            self.current_date = self.current_date.replace(year=self.current_date.year - 1, month=12)
        else:
            self.current_date = self.current_date.replace(month=self.current_date.month - 1)
        self.update_calendar()

    def next_month(self):
        if self.current_date.month == 12:
            self.current_date = self.current_date.replace(year=self.current_date.year + 1, month=1)
        else:
            self.current_date = self.current_date.replace(month=self.current_date.month + 1)
        self.update_calendar()

    def on_day_click(self, row, col):
        year = self.current_date.year
        month = self.current_date.month
        cal = calendar.monthcalendar(year, month)

        if row < len(cal) and col < len(cal[row]):
            day = cal[row][col]
            if day != 0:
                self.selected_date = datetime(year, month, day)
                self.update_calendar()

                if self.on_date_select:
                    self.on_date_select(self.selected_date)