console.py

#!/usr/bin/python3
"""The console for AirBnB clone, hbnb"""
import cmd
from models import storage
from models.base_model import BaseModel
from models.user import User
from models.place import Place
from models.city import City
from models.amenity import Amenity
from models.state import State
from models.review import Review
import json
import shlex


class HBNBCommand(cmd.Cmd):
    """ Class for the command interpreter. This is the entry point"""

    prompt = "(hbnb) "
    l_classes = ['BaseModel', 'User', 'Amenity',
                 'Place', 'City', 'State', 'Review']

    l_c = ['create', 'show', 'update', 'all', 'destroy', 'count']

    def precmd(self, arg):
        """"""
        if '.' in arg and '(' in arg and ')' in arg:
            cls = arg.split('.')
            cnd = cls[1].split('(')
            args = cnd[1].split(')')
            if cls[0] in HBNBCommand.l_classes and cnd[0] in HBNBCommand.l_c:
                arg = cnd[0] + ' ' + cls[0] + ' ' + args[0]
        return arg

    def help_help(self):
        """ Provides description of  given command """
        print("Provides description of a given command")

    def emptyline(self):
        """ Handles empty spaces when you press ENTER """
        pass

    def do_count(self, cls_name):
        """Counts all written commands"""
        count = 0
        all_objs = storage.all()
        for k, v in all_objs.items():
            clss = k.split('.')
            if clss[0] == cls_name:
                count = count + 1
        print(count)

    def do_create(self, type_model):
        """Creates and saves new instances of BaseModel and prints id"""

        if not type_model:
            print("** class name missing **")
        elif type_model not in HBNBCommand.l_classes:
            print("** class doesn't exist **")
        else:
            dct = {'BaseModel': BaseModel, 'User': User, 'Place': Place,
                   'City': City, 'Amenity': Amenity, 'State': State,
                   'Review': Review}
            my_model = dct[type_model]()
            print(my_model.id)
            my_model.save()

    def do_show(self, arg):
        """
        Prints the string representation of an instance based on class name
        """

        if not arg:
            print("** class name missing **")
            return

        args = arg.split(' ')

        if args[0] not in HBNBCommand.l_classes:
            print("** class doesn't exist **")
        elif len(args) == 1:
            print("** instance id missing **")
        else:
            all_objs = storage.all()
            for key, value in all_objs.items():
                ob_name = value.__class__.__name__
                ob_id = value.id
                if ob_name == args[0] and ob_id == args[1].strip('"'):
                    print(value)
                    return
            print("** no instance found **")

    def do_destroy(self, arg):
        """ Deletes an instance based on the class name and id"""

        if not arg:
            print("** class name missing **")
            return

        args = arg.split(' ')

        if args[0] not in HBNBCommand.l_classes:
            print("** class doesn't exist **")
        elif len(args) == 1:
            print("** instance id missing **")
        else:
            all_objs = storage.all()
            for key, value in all_objs.items():
                ob_name = value.__class__.__name__
                ob_id = value.id
                if ob_name == args[0] and ob_id == args[1].strip('"'):
                    del value
                    del storage._FileStorage__objects[key]
                    storage.save()
                    return
            print("** no instance found **")

    def do_all(self, arg):
        """
        Print all string reps of all instances based or not on the class name
        """

        if not arg:
            print("** class name missing **")
            return

        args = arg.split(' ')

        if args[0] not in HBNBCommand.l_classes:
            print("** class doesn't exist **")
        else:
            all_objs = storage.all()
            list_instances = []
            for key, value in all_objs.items():
                ob_name = value.__class__.__name__
                if ob_name == args[0]:
                    list_instances += [value.__str__()]
            print(list_instances)

    def do_update(self, arg):
        """ Updates an instance based on the class name and id"""

        if not arg:
            print("** class name missing **")
            return

        a = ""
        for argv in arg.split(','):
            a = a + argv

        args = shlex.split(a)

        if args[0] not in HBNBCommand.l_classes:
            print("** class doesn't exist **")
        elif len(args) == 1:
            print("** instance id missing **")
        else:
            all_objs = storage.all()
            for key, objc in all_objs.items():
                ob_name = objc.__class__.__name__
                ob_id = objc.id
                if ob_name == args[0] and ob_id == args[1].strip('"'):
                    if len(args) == 2:
                        print("** attribute name missing **")
                    elif len(args) == 3:
                        print("** value missing **")
                    else:
                        setattr(objc, args[2], args[3])
                        storage.save()
                    return
            print("** no instance found **")

    def do_quit(self, line):
        """ Quit command to exit the program"""
        return True

    def do_EOF(self, line):
        """ EOF command to exit the program"""
        return True


if __name__ == '__main__':
    HBNBCommand().cmdloop()