import os
import time
from datetime import datetime

class BackupApp:
    """"Backup class, copy FTL continue file to backup location and restores it."""
    def __init__(self, settings_file_path):
        self.version = 0.1
        self.backup_files = {"1": "initiating"} # initiating variable
        self.settings_path = settings_file_path
        self.settings = self.read_settings()

        if self.settings:
            self.game_path = self.settings[0]
            self.backup_path = self.settings[1]
        else:
            self.game_path, self.backup_path = self.ask_for_path()
            self.write_settings([self.game_path, self.backup_path])

        print(f"Game location: {self.game_path}.\nSave location: {self.backup_path}\n")

    def read_settings(self):
        """Reading the settings file."""
        if os.path.exists(self.settings_path):
            with open(self.settings_path, "r") as f:
                data = f.readlines()
            for i in range(len(data)):
                data[i] = data[i].strip() #stripping white space
            return(data)
        else:
            print("settings file does not exit.")
            return 0

    def ask_for_path(self):
        """Uses get_path to request path from the user."""
        game_path = self.get_path("Game save path", 1)
        backup_path = self.get_path("Backup path")
        return(game_path, backup_path)

    def get_path(self, str, ftl = 0):
        """Get path from user and check if exists."""
        while True:
            path = input(f"please enter {str}: ")
            if ftl:
                profile_file = path + "/ae_prof.sav"
                if os.path.isfile(profile_file):
                    return path
                else:
                    print("Path is not valid, try again.")
                    continue
            if os.path.exists(path):
                return path
                break
            else:
                print("Path not valid, try again.")
                continue
        return path

    def write_settings(self, list):
        """Write the settings (path)"""
        with open(self.settings_path, "w") as f:
            for item in list:
                f.write(item + "\n")
        print("write settings.")

    def copy_file(self, src, dst):
        """"Simply copies a file from a to b."""
        if not os.path.isfile(src):
            print(f"File to copy {src} does not exist.")
            return False
        os.system(f"cp {src} {dst}")
        print(f"Wrote: {dst}")

    def list_backup(self):
        """"List all files inside the backup folder."""
        files = os.listdir(self.backup_path)
        files.reverse() # this way the newest file is the top one.
        self.backup_files.clear()
        i = 1
        for file in files:
            new_item = {f"{i}": file}
            print(f"[{i}] {file}")
            self.backup_files.update(new_item)
            i += 1

    def backup(self):
        """Copies the game file to the backup folder and adds date-time stamp."""
        now = datetime.now()
        formatted_now = now.strftime("%Y-%m-%d_%H-%M")
        self.copy_file(f"{self.game_path}/continue.sav", f"{self.backup_path}/{formatted_now}.bkup")
        time.sleep(1)

    def restore(self):
        """Copies a selected backup file to the game folder and renames it."""
        print("Select a file to restore (back [b]):")
        self.list_backup()
        while True:
            choice = input("Enter number (b = back): ")
            if choice in self.backup_files:
                self.copy_file(f"{self.backup_path}/{self.backup_files[choice]}", f"{self.game_path}/continue.sav")
                print(f"{self.backup_files[choice]} restored.")
                time.sleep(1)
                break
            elif choice == "b":
                break
            else:
                print("not a valid option")
                continue

    def delete_backup_file(self):
        """Deltes all .bkup files in the backup folder."""
        # Making a yes/no function would be cleaner
        if self.yes_no("Backup"):
            for file in os.listdir(self.backup_path):
                if file[-5:] == ".bkup":
                    try:
                        print(f"Deleting {file}.")
                        os.remove(f"{self.backup_path}/{file}")
                        time.sleep(0.1)
                    except Exception as e:
                        print(f"Failed to delete {file}. Reason: {e}.")
                        time.sleep(2)

    def yes_no(self, str):
        """Ask user y/n question regaring deletion of a string."""
        while True:
            choice = input(f"Are you sure you want to delete all {str} files? (y/n)")
            if choice == "y":
                return 1
            elif choice == "n":
                print(f"Deleting {str} files aborted")
                time.sleep(1)
                return 0
            else:
                print("Not a valid option, try again")

class SimpleUI:
    """'UI for the backup class, simply displayes a menu and accepts letter to choice option."""
    def __init__(self, options, names):
        self.options = options
        self.names = names

    def menu(self):
        """"Use dict to select an option (function)."""
        self.print_menu()
        while True:
            choice = input("Selection Option: ")
            if choice in self.options:
                self.options[choice]()
                self.print_menu()
            else:
                print("Try again")
                continue

    def print_menu(self):
        print("\033[H\033[J", end="")
        print("Menu options")
        for key in self.options:
            print(f"{key}: {self.names[key]}")

app = BackupApp("local_files/settings.txt")

menu_options = {
    "b": app.backup,
    "r": app.restore,
    "d": app.delete_backup_file,
    "q": exit
}
menu_names = {
    "b": "Backup now",
    "r": "Restore backup",
    "d": "Delete backup files",
    "q": "Exit"
}

sui = SimpleUI(menu_options, menu_names)

sui.menu()