#!/usr/bin/python3

import pathlib
import argparse
import os
import random
from rich.console import Console
from rich.markdown import Markdown
from ccpq.lib_ccpq import Question, Database, Game

MSG = {
        True: [
            "Yes!",
            "Good one!",
            "Super!",
            "Excellent job!"
            ],
        False: [
            "Sorry, that's wrong",
            "No, that's not right",
            "Damn it! That's not the right answer",
            ]
        }


class Tui(object):
    def __init__(self):
        self._console = Console()
        self._stats = []

    def ask_question(self, question):
        os.system("clear")
        md = Markdown("# {}".format(question.get_question()))
        self._console.print(md)
        md = ""
        for possibility in question.get_possibilities():
            md += "1. {}\n".format(possibility)
        md = Markdown(md)
        self._console.print(md)

    def prompt_for_answer(self):
        #md = Markdown("What's your answer?")
        #self._console.print(md)
        answer = self._parse_input()
        return answer

    def _parse_input(self):
        """
        TODO make it adapt to questions with multiple choices and fill the
        blank
        """
        answers = []
        results = input("\n What's your answer? (only numbers, separated by a SPACE) ")
        results = results.split()
        for result in results:
            if result.isdigit():
                answers.append(result)
            else:
                md = Markdown("**only digits please**")
                self._console.print(md)
        return answers

    def show_response(self, question):
        answers = question.get_right_answers()
        if len(answers) == 1:
            answer = answers[0]
            md = Markdown("### The right answer is: {}".format(answer))
        else:
            md = "### The right answers are:\n"
            for answer in answers:
                md += "* {}\n".format(answer)
            md = Markdown(md)
        self._console.print(md)

    def show_explanation(self, question):
        md = "--- \n {} \n \n ---".format(question.get_explication())
        md = Markdown(md)
        self._console.print(md)

    def show_success(self, success):
        md = "# {}".format(random.choice(MSG[success]))
        md = Markdown(md)
        self._console.print(md)

    def show_stats(self, stats):
        md = "### you have {} out of {} right!".format(stats[0], stats[2])
        md = Markdown(md)
        self._console.print(md)
        md = "### press **enter** to get a new question or **CTRL-C** to quit"
        md = Markdown(md)
        self._console.print(md)
        input()
        
    def goodbye(self):
        md = Markdown("# Goodbye!")
        self._console.print(md)


class Application(object):
    def __init__(self, filepath, interface, number):
        self._db = Database(filepath)
        self._number = number
        self._session = Game()
        self._interface = interface

    def start(self):
        pass


    def run(self):
        while self._number > 0:
            question = self._db.get_question()
            self._interface.ask_question(question)
            answer = self._interface.prompt_for_answer()
            stat = question.verify(answer)
            self._session.update_stats(stat)
            self._interface.show_success(stat)
            self._interface.show_response(question)
            self._interface.show_explanation(question) # will work once issue 5 is addressed
            self._interface.show_stats(self._session.get_stats())
            self._number -= 1
        self.quit()

    def quit(self):
        self._interface.goodbye()


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("-f", "--file", required=True, help="file to use as database", action="store")
    parser.add_argument("-n", "--number", default=10, help="number of questions to ask", type=int, action="store")
    args = parser.parse_args()
    filepath = pathlib.Path(args.file)
    if not filepath.exists():
        print("no such file!")
        exit(1)
    interface = Tui()
    app = Application(filepath, interface, args.number)
    try:
        app.run()
    except KeyboardInterrupt:
        app.quit()