""" Classes Method and Functions for lx Apps """

import os
import shutil
import signal
import base64
import secrets
import subprocess
from subprocess import CompletedProcess, run
import re
import sys
import tkinter as tk
from typing import Optional, Dict, Any, NoReturn, List
import zipfile
from datetime import datetime
from pathlib import Path
from tkinter import ttk, Toplevel
from wp_app_config import AppConfig, Msg
import requests

# Translate
_ = AppConfig.setup_translations()


class CryptoUtil:
    """
    This class is for the creation of the folders and files
    required by Wire-Py, as well as for decryption
    the tunnel from the user's home directory
    """

    @staticmethod
    def decrypt() -> str:
        """
        Starts SSL dencrypt
        """
        crypted_tunnel = [str(file) for file in AppConfig.CONFIG_DIR.glob("*.dat")]
        if crypted_tunnel == []:
            return
        process: CompletedProcess[str] = subprocess.run(
            ["pkexec", "/usr/local/bin/ssl_decrypt.py"],
            capture_output=True,
            text=True,
            check=False,
        )

        # Output from Openssl Error
        if process.stderr:
            print(process.stderr)

        if process.returncode == 0:
            print("Files successfully decrypted...")
        else:
            print(f"Error process decrypt: Code {process.returncode}")

    @staticmethod
    def encrypt() -> str:
        """
        Starts SSL encryption
        """
        process: CompletedProcess[str] = subprocess.run(
            ["pkexec", "/usr/local/bin/ssl_encrypt.py"],
            capture_output=True,
            text=True,
            check=False,
        )

        # Output from Openssl Error
        if process.stderr:
            print(process.stderr)

        if process.returncode == 0:
            print("Files successfully encrypted...")
        else:
            print(f"Error process encrypt: Code {process.returncode}")

    @staticmethod
    def find_key(key: str = "") -> bool:
        """
        Checks if the private key already exists in the system using an external script.
        Returns True only if the full key is found exactly (no partial match).
        """
        process: CompletedProcess[bool] = run(
            ["pkexec", "/usr/local/bin/match_found.py", key],
            capture_output=True,
            text=True,
            check=False,
        )
        if "True" in process.stdout:
            return True
        elif "False" in process.stdout:
            return False
        print(
            f"Unexpected output from the external script:\nSTDOUT: {process.stdout}\nSTDERR: {process.stderr}"
        )
        return False

    @staticmethod
    def is_valid_base64(key: str) -> bool:
        """
        Validates if the input is a valid Base64 string (WireGuard private key format).
        Returns True only for non-empty strings that match the expected length.
        """
        # Check for empty string
        if not key or key.strip() == "":
            return False

        # Regex pattern to validate Base64: [A-Za-z0-9+/]+={0,2}
        base64_pattern = r"^[A-Za-z0-9+/]+={0,2}$"
        if not re.match(base64_pattern, key):
            return False

        try:
            # Decode and check length (WireGuard private keys are 32 bytes long)
            decoded = base64.b64decode(key)
            if len(decoded) != 32:  # 32 bytes = 256 bits
                return False
        except Exception:
            return False

        return True


class LxTools(tk.Tk):
    """
    Class LinuxTools methods that can also be used for other apps
    """

    def __init__(self, *args: Any, **kwargs: Any) -> None:
        super().__init__(*args, **kwargs)

    @staticmethod
    def center_window_cross_platform(window, width, height):
        """
        Centers a window on the primary monitor in a way that works on both X11 and Wayland

        Args:
            window: The tkinter window to center
            width: Window width
            height: Window height
        """
        # Calculate the position before showing the window

        # First attempt: Try to use GDK if available (works on both X11 and Wayland)
        try:
            import gi

            gi.require_version("Gdk", "3.0")
            from gi.repository import Gdk

            display = Gdk.Display.get_default()
            monitor = display.get_primary_monitor() or display.get_monitor(0)
            geometry = monitor.get_geometry()
            scale_factor = monitor.get_scale_factor()

            # Calculate center position on primary monitor
            x = geometry.x + (geometry.width - width // scale_factor) // 2
            y = geometry.y + (geometry.height - height // scale_factor) // 2

            # Set window geometry
            window.geometry(f"{width}x{height}+{x}+{y}")
            return
        except (ImportError, AttributeError):
            pass

        # Second attempt: Try xrandr for X11
        try:
            import subprocess

            output = subprocess.check_output(
                ["xrandr", "--query"], universal_newlines=True
            )

            # Parse the output to find the primary monitor
            primary_info = None
            for line in output.splitlines():
                if "primary" in line:
                    parts = line.split()
                    for part in parts:
                        if "x" in part and "+" in part:
                            primary_info = part
                            break
                    break

            if primary_info:
                # Parse the geometry: WIDTHxHEIGHT+X+Y
                geometry = primary_info.split("+")
                dimensions = geometry[0].split("x")
                primary_width = int(dimensions[0])
                primary_height = int(dimensions[1])
                primary_x = int(geometry[1])
                primary_y = int(geometry[2])

                # Calculate center position on primary monitor
                x = primary_x + (primary_width - width) // 2
                y = primary_y + (primary_height - height) // 2

                # Set window geometry
                window.geometry(f"{width}x{height}+{x}+{y}")
                return
        except (subprocess.SubprocessError, ImportError, IndexError, ValueError):
            pass

        # Final fallback: Use standard Tkinter method
        screen_width = window.winfo_screenwidth()
        screen_height = window.winfo_screenheight()

        # Try to make an educated guess for multi-monitor setups
        # If screen width is much larger than height, assume multiple monitors side by side
        if (
            screen_width > screen_height * 1.8
        ):  # Heuristic for detecting multiple monitors
            # Assume primary monitor is on the left half
            screen_width = screen_width // 2

        x = (screen_width - width) // 2
        y = (screen_height - height) // 2
        window.geometry(f"{width}x{height}+{x}+{y}")

    @staticmethod
    def get_file_name(path: Path, i: int = 5) -> List[str]:
        """
        Recursively searches the specified path for files and returns a list of filenames,
        with the last 'i' characters of each filename removed.

        This method is useful for obtaining filenames without specific file extensions,
        e.g., to remove '.conf' from Wireguard configuration files.

        Args:
            path (Path): The directory path to search
            i (int, optional): Number of characters to remove from the end of each filename.
                            Default is 5, which typically corresponds to the length of '.conf'.

        Returns:
            List[str]: A list of filenames without the last 'i' characters

        Example:
            If path contains files like 'tunnel1.conf', 'tunnel2.conf' and i=5,
            the method returns ['tunnel1', 'tunnel2'].
        """
        lists_file = list(path.rglob("*"))
        lists_file = [conf_file.name[:-i] for conf_file in lists_file]
        return lists_file

    @staticmethod
    def get_username() -> str:
        """
        Returns the username of the logged-in user,
        even if the script is running with root privileges.
        """
        try:
            result = subprocess.run(
                ["logname"],
                stdout=subprocess.PIPE,
                text=True,
                check=True,
            )
            if result.returncode != 0:
                pass

            return result.stdout.strip()

        except subprocess.CalledProcessError:
            pass

    @staticmethod
    def clean_files(TEMP_DIR: Path = None, file: Path = None) -> None:
        """
        method that can be added after need to delete a folder and a file when quitting.
        Args:
            :param file: default None
            :param AppConfig.TEMP_DIR: default None
        """
        if AppConfig.TEMP_DIR is not None:
            shutil.rmtree(AppConfig.TEMP_DIR)
        try:
            if file is not None:
                Path.unlink(file)

        except FileNotFoundError:
            pass

    @staticmethod
    def msg_window(
        image_path: Path,
        image_path2: Path,
        w_title: str,
        w_txt: str,
        txt2: Optional[str] = None,
        com: Optional[str] = None,
    ) -> None:
        """
        Creates message windows

        :argument AppConfig.IMAGE_PATHS["icon_info"] = Image for TK window which is displayed to the left of the text
        :argument AppConfig.IMAGE_PATHS["icon_vpn"] = Image for Task Icon
        :argument w_title = Windows Title
        :argument w_txt = Text for Tk Window
        :argument txt2 = Text for Button two
        :argument com = function for Button command
        """
        msg: tk.Toplevel = tk.Toplevel()
        msg.resizable(width=False, height=False)
        msg.title(w_title)
        msg.configure(pady=15, padx=15)

        # Lade das erste Bild für das Fenster
        try:
            msg.img = tk.PhotoImage(file=image_path)
            msg.i_window = tk.Label(msg, image=msg.img)
        except Exception as e:
            print(f"Fehler beim Laden des Fensterbildes: {e}")
            msg.i_window = tk.Label(msg, text="Bild nicht gefunden")

        label: tk.Label = tk.Label(msg, text=w_txt)
        label.grid(column=1, row=0)

        if txt2 is not None and com is not None:
            label.config(font=("Ubuntu", 11), padx=15, justify="left")
            msg.i_window.grid(column=0, row=0, sticky="nw")
            button2: ttk.Button = ttk.Button(
                msg, text=f"{txt2}", command=com, padding=4
            )
            button2.grid(column=0, row=1, sticky="e", columnspan=2)
            button: ttk.Button = ttk.Button(
                msg, text="OK", command=msg.destroy, padding=4
            )
            button.grid(column=0, row=1, sticky="w", columnspan=2)
        else:
            label.config(font=("Ubuntu", 11), padx=15)
            msg.i_window.grid(column=0, row=0)
            button: ttk.Button = ttk.Button(
                msg, text="OK", command=msg.destroy, padding=4
            )
            button.grid(column=0, columnspan=2, row=1)

        # Lade das Icon für das Fenster
        try:
            icon = tk.PhotoImage(file=image_path2)
            msg.iconphoto(True, icon)
        except Exception as e:
            print(f"Fehler beim Laden des Fenstericons: {e}")

        msg.columnconfigure(0, weight=1)
        msg.rowconfigure(0, weight=1)
        msg.winfo_toplevel()

    @staticmethod
    def sigi(file_path: Optional[Path] = None, file: Optional[Path] = None) -> None:
        """
        Function for cleanup after a program interruption

        :param file: Optional - File to be deleted
        :param file_path: Optional - Directory to be deleted
        """

        def signal_handler(signum: int, frame: Any) -> NoReturn:
            """
            Determines clear text names for signal numbers and handles signals

            Args:
                signum: The signal number
                frame: The current stack frame

            Returns:
                NoReturn since the function either exits the program or continues execution
            """

            signals_to_names_dict: Dict[int, str] = dict(
                (getattr(signal, n), n)
                for n in dir(signal)
                if n.startswith("SIG") and "_" not in n
            )

            signal_name: str = signals_to_names_dict.get(
                signum, f"Unnamed signal: {signum}"
            )

            # End program for certain signals, report to others only reception
            if signum in (signal.SIGINT, signal.SIGTERM):
                exit_code: int = 1
                print(
                    f"\nSignal {signal_name} {signum} received. => Aborting with exit code {exit_code}."
                )
                LxTools.clean_files(file_path, file)
                print("Breakdown by user...")
                sys.exit(exit_code)
            else:
                print(f"Signal {signum} received and ignored.")
                LxTools.clean_files(file_path, file)
                print("Process unexpectedly ended...")

        # Register signal handlers for various signals
        signal.signal(signal.SIGINT, signal_handler)
        signal.signal(signal.SIGTERM, signal_handler)
        signal.signal(signal.SIGHUP, signal_handler)


class Tunnel:
    """
    Class of Methods for Wire-Py
    """

    @staticmethod
    def parse_files_to_dictionary(
        directory: Path = None, filepath: str = None, content: str = None
    ) -> dict | str | None:
        data = {}

        if filepath is not None:
            filepath = Path(filepath)
            try:
                content = filepath.read_text()

                # parse the content
                address_line = next(
                    line for line in content.splitlines() if line.startswith("Address")
                )
                dns_line = next(
                    line for line in content.splitlines() if line.startswith("DNS")
                )
                endpoint_line = next(
                    line for line in content.splitlines() if line.startswith("Endpoint")
                )
                private_key_line = next(
                    line
                    for line in content.splitlines()
                    if line.startswith("PrivateKey")
                )

                content = secrets.token_bytes(len(content))

                # extract the values
                address = address_line.split("=")[1].strip()
                dns = dns_line.split("=")[1].strip()
                endpoint = endpoint_line.split("=")[1].strip()
                private_key = private_key_line.split("=")[1].strip()

                # Shorten the tunnel name to the maximum allowed length if it exceeds 12 characters.
                original_stem = filepath.stem
                truncated_stem = (
                    original_stem[-12:] if len(original_stem) > 12 else original_stem
                )

                # save in the dictionary
                data[truncated_stem] = {
                    "Address": address,
                    "DNS": dns,
                    "Endpoint": endpoint,
                    "PrivateKey": private_key,
                }

                content = secrets.token_bytes(len(content))

            except StopIteration:
                pass

        elif directory is not None:

            if not directory.exists() or not directory.is_dir():
                print("Temp directory does not exist or is not a directory.")
                return None

            # Get a list of all files in the directory
            files = [file for file in AppConfig.TEMP_DIR.iterdir() if file.is_file()]

            # Search for the string in the files
            for file in files:
                try:
                    content = file.read_text()
                    # parse the content
                    address_line = next(
                        line
                        for line in content.splitlines()
                        if line.startswith("Address")
                    )
                    dns_line = next(
                        line for line in content.splitlines() if line.startswith("DNS")
                    )
                    endpoint_line = next(
                        line
                        for line in content.splitlines()
                        if line.startswith("Endpoint")
                    )

                    # extract values
                    address = address_line.split("=")[1].strip()
                    dns = dns_line.split("=")[1].strip()
                    endpoint = endpoint_line.split("=")[1].strip()

                    # save values to dictionary
                    data[file.stem] = {
                        "Address": address,
                        "DNS": dns,
                        "Endpoint": endpoint,
                    }

                except Exception:
                    # Ignore errors and continue to the next file
                    continue
            if content is not None:
                content = secrets.token_bytes(len(content))
        if filepath is not None:
            return data, truncated_stem
        else:
            return data

    @staticmethod
    def active() -> str:
        """
        Shows the Active Tunnel
        """
        active = (
            os.popen('nmcli con show --active | grep -iPo "(.*)(wireguard)"')
            .read()
            .split()
        )
        if not active:
            active = ""
        else:
            active = active[0]

        return active

    @staticmethod
    def list() -> List[str]:
        """
        Returns a list of Wireguard tunnel names
        """
        AppConfig.TEMP_DIR: Path = Path("/tmp/tlecdcwg/")
        wg_s: List[str] = os.listdir(AppConfig.TEMP_DIR)

        return wg_s

    @staticmethod
    def export(
        image_path: Path = None,
        image_path2: Path = None,
        image_path3: Path = None,
        image_path4: Path = None,
        title: Dict = None,
        window_msg: Dict = None,
    ) -> None:
        """
        This will export the tunnels.
        A zipfile with the current date and time is created
        in the user's home directory with the correct right
        Args:
            AppConfig.IMAGE_PATHS["icon_info"]: Image for TK window which is displayed to the left of the text
            AppConfig.IMAGE_PATHS["icon_vpn"]: Image for Task Icon
            AppConfig.IMAGE_PATHS["icon_error"]: Image for TK window which is displayed to the left of the text
            AppConfig.IMAGE_PATHS["icon_msg"]: Image for Task Icon
        """
        now_time: datetime = datetime.now()
        now_datetime: str = now_time.strftime("wg-exp-%m-%d-%Y-%H:%M")
        tl: List[str] = Tunnel.list()

        try:
            if len(tl) != 0:
                wg_tar: str = f"{Path.home()}/{now_datetime}"
                shutil.copytree("/tmp/tlecdcwg/", "/tmp/wire_py", dirs_exist_ok=True)
                source: Path = Path("/tmp/wire_py")
                shutil.make_archive(wg_tar, "zip", source)
                shutil.rmtree(source)
                with zipfile.ZipFile(f"{wg_tar}.zip", "r") as zf:
                    if len(zf.namelist()) != 0:

                        LxTools.msg_window(
                            AppConfig.IMAGE_PATHS["icon_info"],
                            AppConfig.IMAGE_PATHS["icon_vpn"],
                            Msg.STR["exp_succ"],
                            Msg.STR["exp_in_home"],
                        )

                    else:

                        LxTools.msg_window(
                            AppConfig.IMAGE_PATHS["icon_error"],
                            AppConfig.IMAGE_PATHS["icon_msg"],
                            Msg.STR["exp_err"],
                            Msg.STR["exp_try"],
                        )

            else:

                LxTools.msg_window(
                    AppConfig.IMAGE_PATHS["icon_info"],
                    AppConfig.IMAGE_PATHS["icon_msg"],
                    Msg.STR["sel_tl"],
                    Msg.STR["tl_first"],
                )

        except TypeError:
            pass


# ConfigManager with caching
class ConfigManager:
    """
    Universal class for managing configuration files with caching.
    Can be reused in different projects.
    """

    _config = None
    _config_file = None

    @classmethod
    def init(cls, config_file):
        """Initial the Configmanager with the given config file"""
        cls._config_file = config_file
        cls._config = None  # Reset the cache

    @classmethod
    def load(cls):
        """Load the config file and return the config as dict"""
        if not cls._config:
            try:
                lines = Path(cls._config_file).read_text(encoding="utf-8").splitlines()
                cls._config = {
                    "updates": lines[1].strip(),
                    "theme": lines[3].strip(),
                    "tooltips": lines[5].strip()
                    == "True",  # is converted here to boolean!!!
                    "autostart": lines[7].strip() if len(lines) > 7 else "off",
                }
            except (IndexError, FileNotFoundError):
                # DeDefault values in case of error
                cls._config = {
                    "updates": "on",
                    "theme": "light",
                    "tooltips": "True",  # Default Value as string !
                    "autostart": "off",
                }
        return cls._config

    @classmethod
    def save(cls):
        """Save the config to the config file"""
        if cls._config:
            lines = [
                "# Configuration\n",
                f"{cls._config['updates']}\n",
                "# Theme\n",
                f"{cls._config['theme']}\n",
                "# Tooltips\n",
                f"{str(cls._config['tooltips'])}\n",
                "# Autostart\n",
                f"{cls._config['autostart']}\n",
            ]
            Path(cls._config_file).write_text("".join(lines), encoding="utf-8")

    @classmethod
    def set(cls, key, value):
        """Sets a configuration value and saves the change"""
        cls.load()
        cls._config[key] = value
        cls.save()

    @classmethod
    def get(cls, key, default=None):
        """Returns a configuration value"""
        config = cls.load()
        return config.get(key, default)


class ThemeManager:
    @staticmethod
    def change_theme(root, theme_in_use, theme_name=None):
        """Change application theme centrally"""
        root.tk.call("set_theme", theme_in_use)
        if theme_in_use == theme_name:
            ConfigManager.set("theme", theme_in_use)


class GiteaUpdate:
    """
    Calling download requests the download URL of the running script,
    the taskbar image for the “Download OK” window, the taskbar image for the
    “Download error” window and the variable res
    """

    @staticmethod
    def api_down(update_api_url: str, version: str, update_setting: str = None) -> str:
        """
        Checks for updates via API

        Args:
            update_api_url: Update API URL
            version: Current version
            update_setting: Update setting from ConfigManager (on/off)

        Returns:
            New version or status message
        """
        # If updates are disabled, return immediately
        if update_setting != "on":
            return "False"

        try:
            response: requests.Response = requests.get(update_api_url, timeout=10)
            response.raise_for_status()  # Raise exception for HTTP errors

            response_data = response.json()
            if not response_data:
                return "No Updates"

            latest_version = response_data[0].get("tag_name")
            if not latest_version:
                return "Invalid API Response"

            # Compare versions (strip 'v. ' prefix if present)
            current_version = version[3:] if version.startswith("v. ") else version

            if current_version != latest_version:
                return latest_version
            else:
                return "No Updates"

        except requests.exceptions.RequestException:
            return "No Internet Connection!"
        except (ValueError, KeyError, IndexError):
            return "Invalid API Response"

    @staticmethod
    def download(
        urld: str,
        res: str,
        image_path: Path = None,
        image_path2: Path = None,
        image_path3: Path = None,
        image_path4: Path = None,
    ) -> None:
        """
        Downloads new version of wirepy

        Args:
            urld: Download URL
            res: Result filename
            AppConfig.IMAGE_PATHS["icon_info"]: Image for TK window which is displayed to the left of the text
            AppConfig.IMAGE_PATHS["icon_vpn"]: Image for Task Icon
            AppConfig.IMAGE_PATHS["icon_error"]: Image for TK window which is displayed to the left of the text
            AppConfig.IMAGE_PATHS["icon_msg"]: Image for Task Icon
        """
        try:
            to_down: str = f"wget -qP {Path.home()} {" "} {urld}"
            result: int = subprocess.call(to_down, shell=True)
            if result == 0:
                shutil.chown(f"{Path.home()}/{res}.zip", 1000, 1000)

                wt: str = _("Download Successful")
                msg_t: str = _("Your zip file is in home directory")
                LxTools.msg_window(
                    AppConfig.IMAGE_PATHS["icon_info"],
                    AppConfig.IMAGE_PATHS["icon_vpn"],
                    wt,
                    msg_t,
                )

            else:

                wt: str = _("Download error")
                msg_t: str = _("Download failed! Please try again")
                LxTools.msg_window(
                    AppConfig.IMAGE_PATHS["icon_error"],
                    AppConfig.IMAGE_PATHS["icon_msg"],
                    wt,
                    msg_t,
                )

        except subprocess.CalledProcessError:

            wt: str = _("Download error")
            msg_t: str = _("Download failed! No internet connection!")
            LxTools.msg_window(
                AppConfig.IMAGE_PATHS["icon_error"],
                AppConfig.IMAGE_PATHS["icon_msg"],
                wt,
                msg_t,
            )


class Tooltip:
    """Class for Tooltip
    from common_tools.py import Tooltip
    example: Tooltip(label, "Show tooltip on label")
    example: Tooltip(button, "Show tooltip on button")
    example: Tooltip(widget, "Text", state_var=tk.BooleanVar())
    example: Tooltip(widget, "Text", state_var=tk.BooleanVar(), x_offset=20, y_offset=10)

    info: label and button are parent widgets.
    NOTE: When using with state_var, pass the tk.BooleanVar object directly,
    NOT its value. For example: use state_var=my_bool_var, NOT state_var=my_bool_var.get()
    """

    def __init__(
        self,
        widget: Any,
        text: str,
        state_var: Optional[tk.BooleanVar] = None,
        x_offset: int = 65,
        y_offset: int = 40,
    ) -> None:
        """Tooltip Class"""
        self.widget: Any = widget
        self.text: str = text
        self.tooltip_window: Optional[Toplevel] = None
        self.state_var = state_var
        self.x_offset = x_offset
        self.y_offset = y_offset

        # Initial binding based on current state
        self.update_bindings()

        # Add trace to the state_var if provided
        if self.state_var is not None:
            self.state_var.trace_add("write", self.update_bindings)

    def update_bindings(self, *args) -> None:
        """Updates the bindings based on the current state"""
        # Remove existing bindings first
        self.widget.unbind("<Enter>")
        self.widget.unbind("<Leave>")

        # Add new bindings if tooltips are enabled
        if self.state_var is None or self.state_var.get():
            self.widget.bind("<Enter>", self.show_tooltip)
            self.widget.bind("<Leave>", self.hide_tooltip)

    def show_tooltip(self, event: Optional[Any] = None) -> None:
        """Shows the tooltip"""
        if self.tooltip_window or not self.text:
            return

        x: int
        y: int
        cx: int
        cy: int

        x, y, cx, cy = self.widget.bbox("insert")
        x += self.widget.winfo_rootx() + self.x_offset
        y += self.widget.winfo_rooty() + self.y_offset

        self.tooltip_window = tw = tk.Toplevel(self.widget)
        tw.wm_overrideredirect(True)
        tw.wm_geometry(f"+{x}+{y}")

        label: tk.Label = tk.Label(
            tw,
            text=self.text,
            background="lightgreen",
            foreground="black",
            relief="solid",
            borderwidth=1,
            padx=5,
            pady=5,
        )
        label.grid()

        self.tooltip_window.after(2200, lambda: tw.destroy())

    def hide_tooltip(self, event: Optional[Any] = None) -> None:
        """Hides the tooltip"""
        if self.tooltip_window:
            self.tooltip_window.destroy()
            self.tooltip_window = None