import time
import imaplib
import email
import os
import pkgutil
import RPi.GPIO as GPIO


##########################################

# Add your gmail username and password here

username = "gmailclient@gmail.com"
password = "parola"

##########################################


class ControlException(Exception):
    pass


class Control():
    def __init__(self, username, password):
        print("------------------------------------------------------")
        print("-                    SIRI CONTROL                    -")
        print("-           Created by Sanjeet Chatterjee            -")
        print("-      Website: thereallycoolstuff.wordpress.com     -")
        print("------------------------------------------------------")

        try:
            self.last_checked = -1
            self.mail = imaplib.IMAP4_SSL("imap.gmail.com", 993)
            self.mail.login(username, password)
            self.mail.list()
            self.mail.select("Notes")

            # Gets last Note id to stop last command from executing
            result, uidlist = self.mail.search(None, "ALL")
            try:
                self.last_checked = uidlist[0].split()[-1]
            except IndexError:
                pass

            self.load()
            self.handle()
        except imaplib.IMAP4.error:
            print("Your username and password is incorrect")
            print("Or IMAP is not enabled.")

    def load(self):
        """Try to load all modules found in the modules folder"""
        print("\n")
        print("Loading modules...")
        self.modules = []
        path = os.path.join(os.path.dirname(__file__), "modules")
        directory = pkgutil.iter_modules(path=[path])
        for finder, name, ispkg in directory:
            try:
                loader = finder.find_module(name)
                module = loader.load_module(name)
                if hasattr(module, "commandWords") \
                        and hasattr(module, "moduleName") \
                        and hasattr(module, "execute"):
                    self.modules.append(module)
                    print("The module '{0}' has been loaded, "
                          "successfully.".format(name))
                else:
                    print("[ERROR] The module '{0}' is not in the "
                          "correct format.".format(name))
            except:
                print("[ERROR] The module '" + name + "' has some errors.")
        print("\n")

    def fetch_command(self):
        """Retrieve the last Note created if new id found"""
        self.mail.list()
        self.mail.select("Notes")

        result, uidlist = self.mail.search(None, "ALL")
        try:
            latest_email_id = uidlist[0].split()[-1]
        except IndexError:
            return

        if latest_email_id == self.last_checked:
            return

        self.last_checked = latest_email_id
        result, data = self.mail.fetch(latest_email_id, "(RFC822)")
        voice_command = email.message_from_string(data[0][1].decode('utf-8'))
        return str(voice_command.get_payload()).lower().strip()

    def handle(self):
        """Handle new commands

        Poll continuously every second and check for new commands.
        """
        print("Fetching commands...")
        print("\n")

        while True:
            try:
                command = self.fetch_command()
                if not command:
                    raise ControlException("No command found.")

                print("The word(s) '" + command + "' have been said")
                for module in self.modules:
                    foundWords = []
                    for word in module.commandWords:
                        if str(word) in command:
                            foundWords.append(str(word))
                    if len(foundWords) == len(module.commandWords):
                        try:
                            module.execute(command)
                            print("The module {0} has been executed "
                                  "successfully.".format(module.moduleName))
                        except:
                            print("[ERROR] There has been an error "
                                  "when running the {0} module".format(
                                      module.moduleName))
                    else:
                        print("\n")
            except (TypeError, ControlException):
                pass
            except Exception as exc:
                print("Received an exception while running: {exc}".format(
                    **locals()))
                print("Restarting...")
            time.sleep(1)


if __name__ == '__main__':
    Control(username, password)