# profileanalyzer/gui/settings_window.py

import tkinter as tk
from tkinter import ttk, messagebox
import json
import os

class SettingsWindow(tk.Toplevel):
    """A Toplevel window for managing application settings."""

    CONFIG_FILE = "app_config.json"

    def __init__(self, master):
        super().__init__(master)
        self.config_data = {}

        self._init_window()
        self._init_vars()
        self._load_config()
        self._create_widgets()

    def _init_window(self):
        self.title("Settings")
        self.geometry("600x200")
        self.transient(self.master)
        self.grab_set()

    def _init_vars(self):
        self.editor_command_var = tk.StringVar()

    def _load_config(self):
        try:
            if os.path.exists(self.CONFIG_FILE):
                with open(self.CONFIG_FILE, 'r', encoding='utf-8') as f:
                    self.config_data = json.load(f)
        except (IOError, json.JSONDecodeError) as e:
            print(f"Could not load config file: {e}")
            self.config_data = {}
        
        # Set default value if not present
        default_command = 'code -g "{file}:{line}"'
        self.editor_command_var.set(self.config_data.get("editor_command", default_command))

    def _create_widgets(self):
        main_frame = ttk.Frame(self, padding="10")
        main_frame.pack(fill=tk.BOTH, expand=True)

        editor_frame = ttk.LabelFrame(main_frame, text="Editor Integration", padding="10")
        editor_frame.pack(fill=tk.X, expand=True)
        editor_frame.columnconfigure(0, weight=1)

        info_label = ttk.Label(editor_frame, text="Command template to open a file in your editor.\nUse {file} for the file path and {line} for the line number.", wraplength=550)
        info_label.grid(row=0, column=0, columnspan=2, sticky="w", pady=(0, 10))

        ttk.Entry(editor_frame, textvariable=self.editor_command_var).grid(row=1, column=0, sticky="ew")

        button_frame = ttk.Frame(main_frame, padding=(0, 10, 0, 0))
        button_frame.pack(fill=tk.X, side=tk.BOTTOM)
        
        ttk.Button(button_frame, text="Save", command=self._on_save).pack(side=tk.RIGHT)
        ttk.Button(button_frame, text="Cancel", command=self.destroy).pack(side=tk.RIGHT, padx=5)

    def _on_save(self):
        new_command = self.editor_command_var.get()
        if "{file}" not in new_command or "{line}" not in new_command:
            messagebox.showwarning("Warning", "The command template should contain both {file} and {line} placeholders.", parent=self)
            return

        self.config_data["editor_command"] = new_command
        try:
            with open(self.CONFIG_FILE, 'w', encoding='utf-8') as f:
                json.dump(self.config_data, f, indent=4)
            self.destroy()
        except IOError as e:
            messagebox.showerror("Error", f"Could not save config file: {e}", parent=self)