from pathlib import Path, PurePosixPath
from shutil import copyfile
import re
import os

def __main__():
    # will ask user for input again after invalid response or completion

    while(True):
        # input_parser() returns a list
        consider_list = input_parser_1()
        print_list(consider_list)
        interest_list = input_parser_1(consider_list)
        print_list(interest_list)
        take_action(input_parser_2(), interest_list)

def print_list(x) -> None:
    #x.sort()
    for elem in x:
        print(elem)

def input_parser_1(consider_list=[]) -> list:
    "receives input and stores the one-letter action and the phrase individually"

    while True:
        response = input()
        action = response[0]

        # Stores general phrase (could be path, text, etc) in p
        p = response[2:]

        # If the inputted action ('D') is in the list of accepted actions ('DR'), proceed to consider_files()
        if action in 'DR':
            return consider_files(p, action)

        elif action in 'ANET<>':
            return interest_files(p, action, consider_list)

        elif action in 'FDT':
            print('hi')
            return action

        else:
            print('ERROR')

def input_parser_2() -> str:
    while True:
        response = input()
        action = response

        if action in 'FDT':
            return action

        else:
            print('ERROR')

# separate function to consider files
def consider_files(p, action, consider_list=[]) -> list:
    "returns a list of considered files"

    if action == 'D':
        for path in list(Path(p).iterdir()):
            if path.is_file():
                consider_list.append(path)

    if action == 'R':
        for path in list(Path(p).iterdir()):
            if path.is_dir():
                consider_files(path, action, consider_list)
            else:
                consider_list.append(path)

    return consider_list

def interest_files(p, action, consider_list, interest_list=[]) -> list:
    "returns a list of interesting files"

    if action == 'A':
        interest_list = consider_list

    if action == 'N':
        for path in consider_list:
            if p in str(path):
                interest_list.append(path)

    if action == 'E':
        for path in consider_list:
            extension = PurePosixPath(path).suffix
            if p in extension:
                interest_list.append(path)

    if action == 'T':
        for path in consider_list:
            with open(path, 'r') as file:
                for line in file:
                    if p in line:
                        interest_list.append(path)
                        break

    if action == '<':
        for path in consider_list:
            if os.path.getsize(path) < int(p):
                interest_list.append(path)

    if action == '>':
        for path in consider_list:
            if os.path.getsize(path) > int(p):
                interest_list.append(path)

    return interest_list

def take_action(action, interest_list) -> None:
    if action == 'F':
        for path in interest_list:
            with open(path, 'r') as file:
                print(file.readline().split(' ')[0])

    if action == 'D':
        print("hi")
        for path in interest_list:
            print(path)
            dst = str(path) + '.dup'
            copy(path, dst)

    if action == 'T':
        for path in interest_list:
            os.utime(path)

if __name__ == '__main__':
    __main__()