# --- FILE: gitsync_tool/gui/tabs/backup_tab.py ---

import tkinter as tk
from tkinter import ttk
from typing import Callable, Optional

from gitutility.gui.tooltip import Tooltip

class BackupTab(ttk.Frame):
    """
    The 'Backup Settings' tab in the main application notebook.
    This tab provides widgets for configuring automatic and manual backups.
    """

    def __init__(self, master: tk.Misc, **kwargs):
        """
        Initializes the Backup Settings tab.

        Args:
            master: The parent widget (the ttk.Notebook).
            **kwargs: Dictionary of callbacks from the main controller.
        """
        super().__init__(master, padding=(10, 10))

        # Store callbacks
        self.manual_backup_callback = kwargs.get('manual_backup_cb')
        self.browse_folder_callback = kwargs.get('browse_folder_cb')
        
        # --- Tkinter Variables specific to this tab ---
        self.autobackup_var = tk.BooleanVar()
        self.backup_dir_var = tk.StringVar()
        self.backup_exclude_extensions_var = tk.StringVar()
        self.backup_exclude_dirs_var = tk.StringVar()

        # Configure layout
        self.columnconfigure(1, weight=1)

        # Create widgets
        self._create_widgets()

    def _create_widgets(self) -> None:
        """Creates and arranges all widgets for this tab."""
        # --- Backup Configuration Frame ---
        config_frame = ttk.LabelFrame(self, text="Backup Configuration", padding=(10, 5))
        config_frame.pack(pady=5, fill="x", expand=False)
        config_frame.columnconfigure(1, weight=1)

        # Autobackup Checkbox
        self.autobackup_checkbox = ttk.Checkbutton(
            config_frame,
            text="Enable Auto Backup before Actions (Create/Fetch Bundle)",
            variable=self.autobackup_var,
            command=self.toggle_backup_dir_widgets,
        )
        self.autobackup_checkbox.grid(row=0, column=0, columnspan=3, sticky=tk.W, padx=5, pady=(5, 5))
        Tooltip(
            self.autobackup_checkbox,
            "Automatically create a ZIP backup of the working directory before creating or fetching from a bundle."
        )

        # Backup Directory
        backup_dir_label = ttk.Label(config_frame, text="Backup Directory:")
        backup_dir_label.grid(row=1, column=0, sticky=tk.W, padx=5, pady=3)

        self.backup_dir_entry = ttk.Entry(
            config_frame, textvariable=self.backup_dir_var, width=60, state=tk.DISABLED
        )
        self.backup_dir_entry.grid(row=1, column=1, sticky=tk.EW, padx=5, pady=3)
        Tooltip(self.backup_dir_entry, "Directory where automatic and manual backup ZIP files will be stored.")

        self.backup_dir_button = ttk.Button(
            config_frame, text="Browse...", width=9, command=self._browse_backup_dir, state=tk.DISABLED
        )
        self.backup_dir_button.grid(row=1, column=2, sticky=tk.W, padx=(0, 5), pady=3)

        # Exclusions
        exclude_ext_label = ttk.Label(config_frame, text="Exclude File Exts:")
        exclude_ext_label.grid(row=2, column=0, sticky=tk.W, padx=5, pady=3)

        self.backup_exclude_entry = ttk.Entry(
            config_frame, textvariable=self.backup_exclude_extensions_var, width=60
        )
        self.backup_exclude_entry.grid(row=2, column=1, columnspan=2, sticky=tk.EW, padx=5, pady=3)
        Tooltip(
            self.backup_exclude_entry,
            "Comma-separated list of file extensions to exclude from backups (e.g., .log, .tmp, .bak)."
        )

        exclude_dir_label = ttk.Label(config_frame, text="Exclude Dirs (Name):")
        exclude_dir_label.grid(row=3, column=0, sticky=tk.W, padx=5, pady=3)

        self.backup_exclude_dirs_entry = ttk.Entry(
            config_frame, textvariable=self.backup_exclude_dirs_var, width=60
        )
        self.backup_exclude_dirs_entry.grid(row=3, column=1, columnspan=2, sticky=tk.EW, padx=5, pady=3)
        Tooltip(
            self.backup_exclude_dirs_entry,
            "Comma-separated list of directory base names to exclude (e.g., __pycache__, build, node_modules). .git and .svn are always excluded."
        )

        # --- Manual Backup Action Frame ---
        action_frame = ttk.LabelFrame(self, text="Manual Backup", padding=(10, 5))
        action_frame.pack(pady=10, fill="x", expand=False)

        self.manual_backup_button = ttk.Button(
            action_frame, text="Backup Now (ZIP)", command=self.manual_backup_callback, state=tk.DISABLED
        )
        self.manual_backup_button.pack(side=tk.LEFT, padx=5, pady=5)
        Tooltip(
            self.manual_backup_button,
            "Create a manual ZIP backup of the working directory now using the configured exclusions."
        )

    def _browse_backup_dir(self):
        """Internal handler to call the browse callback for the backup directory entry."""
        if hasattr(self, "backup_dir_entry") and callable(self.browse_folder_callback):
            self.browse_folder_callback(self.backup_dir_entry)

    def toggle_backup_dir_widgets(self) -> None:
        """Enables or disables the backup directory widgets based on the autobackup checkbox."""
        state = tk.NORMAL if self.autobackup_var.get() else tk.DISABLED
        
        if hasattr(self, "backup_dir_entry") and self.backup_dir_entry.winfo_exists():
            self.backup_dir_entry.config(state=state)
        
        if hasattr(self, "backup_dir_button") and self.backup_dir_button.winfo_exists():
            self.backup_dir_button.config(state=state)

    def set_action_widgets_state(self, state: str) -> None:
        """Sets the state of all action widgets in this tab."""
        widgets_to_toggle = [
            self.autobackup_checkbox,
            self.manual_backup_button,
        ]

        for widget in widgets_to_toggle:
            if widget and widget.winfo_exists():
                widget.config(state=state)
        
        if state == tk.DISABLED:
            if hasattr(self, "backup_dir_entry"): self.backup_dir_entry.config(state=tk.DISABLED)
            if hasattr(self, "backup_dir_button"): self.backup_dir_button.config(state=tk.DISABLED)
        else:
            self.toggle_backup_dir_widgets()