import os
import csv
import random
import time

from rich.console import Console
from rich.markdown import Markdown

# Error codes :
# exit (1) = function _open_csv


def _open_csv(filename):
    # Return True + csv list ===> all ok
    #       with added "done" : "False" ===> Did the user already replied to this qst?
    #       with added "correct" : "False" ===> Was the answer of the user right or wrong
    # or
    # Return False + error message ===> problem
    try:
        with open(filename) as csv_fp:
            data = []
            data_fp = csv.DictReader(csv_fp)
            for item in data_fp:
                data.append(item)
                item["done"] = False
                item["correct"] = False
            return data
    except Exception as error:
        #print(error)
        #log("csv opening", error)
        exit(1)


def _user_conf(max_qst):
    nb_qst = "0"
    name = input("Enter your name please : ")
    while not nb_qst.isnumeric() or int(nb_qst) <= 0 or int(nb_qst) > max_qst:
        nb_qst = input("How many question do you want (max {}) : ".format(max_qst))
    return name, nb_qst


def _display_question(question):
    os.system("clear")
    console = Console()
    display_qst = "# {}".format(question["QUESTION"])
    display_qst = Markdown(display_qst)
    console.print(display_qst)
    answer = ""
    for i in question.keys():
        if i.isnumeric():
            answer += "1. {} \n".format(question[i])
    answer += "\n\n[Q]uit"
    answer = Markdown(answer)
    console.print(answer)


def _wait_user_answ(answer):
    if len(answer["ANSWER"]) > 1:  # if ===> several answers
        real_answer = []
        user_answer = []
        # Build list of right answers
        for i in str(answer["ANSWER"]):
            if i.isnumeric():
                real_answer.append(i)
        # Wait answers of the user
        result = input("\nWhat are your choices : ")
        if result.lower() == "q" or result.lower() == "quit":
            return 3
        # Build list of user answers
        for i in result:
            if i.isnumeric():
                user_answer.append(i)
        # Compare
        real_answer.sort()
        user_answer.sort()
        if real_answer == user_answer:
            return True
        else:
            return False
    else:  # ===> if only one possible answer
        result = input("\nWhat is your choice : ")

        if result.lower() == "q" or result.lower() == "quit":
            return 3
        if result in answer["ANSWER"] and len(result) != 0:
            return True
        else:
            return False


def _stats(stats_list, player):
    count_qst = 0
    count_right_answ = 0
    os.system("clear")
    console = Console()
    display = "# Hi {}\nYour exam test is finished !!!\n".format(player)
    display = Markdown(display)
    console.print(display)
    for item in stats_list:
        if item["done"] is True:
            count_qst += 1
            if item["correct"] is True:
                count_right_answ += 1
    display = "# You replied to {} questions, with {} right answers!!!".format(count_qst, count_right_answ)
    display = Markdown(display)
    console.print(display)


def main():
    filename = 'data/list_book1.csv'
    # csv_list = list of dictionaries :
    csv_list = _open_csv(filename)
    random.shuffle(csv_list)  # shuffle the list.
    # Collects the name of the player AND the number of questions wished :
    player, nb_qst = _user_conf(len(csv_list))
    count = int(nb_qst)
    # The loop :
    get_out_while = False
    while count > 0 and get_out_while is False:
        count -= 1
        _display_question(csv_list[count])
        # Check if correct answer
        result = _wait_user_answ(csv_list[count])

        if result == 3:  # quit!
            get_out_while = True
        elif result:     # right answer!
            csv_list[count]["correct"] = True
            csv_list[count]["done"] = True
        else:            # wrong answer!
            csv_list[count]["done"] = True
    # End of while
    _stats(csv_list, player)


if __name__ == "__main__":
    main()