#!/usr/bin/env python
# encoding: utf-8


from prompt_toolkit import prompt, HTML, ANSI
from prompt_toolkit import print_formatted_text as print
from prompt_toolkit.styles import Style
from prompt_toolkit.validation import Validator
from prompt_toolkit.completion import WordCompleter
from unidecode import unidecode
from datetime import datetime
from functools import wraps
import sys

from .getconfig import config


VALIDATE = [
    "o",
    "ok",
    "OK",
    "oui",
    "OUI",
    "yes",
    "YES",
]
REFUSE = ["n", "non", "NON", "no", "NO"]
CANCEL = ["a", "annuler"]

STYLE = Style.from_dict(
    {
        "": "#93A1A1",
        "validation": "#884444",
        "appending": "#448844",
    }
)


class CancelError(Exception):
    pass


def prompt_validate(question, cancelable=False, empty_means=1, style="validation"):
    """Prompt for validation

    :param question: Text to print to ask the question.
    :param cancelable: enable cancel answer
    :param empty_means: result for no answer
    :return:
        0 -> Refuse
        1 -> Validate
        -1 -> cancel
    """
    question_ = question
    choices = VALIDATE + REFUSE

    if cancelable:
        question_ += "(a ou annuler pour sortir)"
        choices += CANCEL

    ans = prompt(
        [
            (f"class:{style}", question_),
        ],
        completer=WordCompleter(choices),
        style=STYLE,
    ).lower()

    if ans == "":
        return empty_means
    if ans in VALIDATE:
        return 1
    if cancelable and ans in CANCEL:
        return -1
    return 0


def prompt_until_validate(question="C'est ok? ", cancelable=False):
    def decorator(func):
        @wraps(func)
        def wrapper(*args, **kwrd):
            ans = func(*args, **kwrd)

            confirm = prompt_validate(question, cancelable)

            if confirm == -1:
                raise CancelError

            while not confirm:
                sys.stdout.flush()
                ans = func(*args, **ans, **kwrd)
                confirm = prompt_validate(question, cancelable)
                if confirm == -1:
                    raise CancelError
            return ans

        return wrapper

    return decorator


@prompt_until_validate()
def prompt_exam(**kwrd):
    """ Prompt questions to edit an exam """
    print(HTML("<b>Nouvelle évaluation</b>"))
    exam = {}
    exam["name"] = prompt("Nom de l'évaluation: ", default=kwrd.get("name", "DS"))

    tribes_name = [t["name"] for t in config["tribes"]]

    exam["tribename"] = prompt(
        "Nom de la classe: ",
        default=kwrd.get("tribename", ""),
        completer=WordCompleter(tribes_name),
        validator=Validator.from_callable(lambda x: x in tribes_name),
    )
    exam["tribe"] = [t for t in config["tribes"] if t["name"] == exam["tribename"]][0]

    exam["date"] = prompt(
        "Date de l'évaluation (%y%m%d): ",
        default=kwrd.get("date", datetime.today()).strftime("%y%m%d"),
        validator=Validator.from_callable(lambda x: (len(x) == 6) and x.isdigit()),
    )
    exam["date"] = datetime.strptime(exam["date"], "%y%m%d")

    exam["term"] = prompt(
        "Trimestre: ",
        validator=Validator.from_callable(lambda x: x.isdigit()),
        default=kwrd.get("term", "1"),
    )
    exam["ExQty"] = prompt(
        "Nombre d'exercices: ",
        validator=Validator.from_callable(lambda x: x.isdigit()),
        default=kwrd.get("ExQty", "1"),
    )

    return exam


@prompt_until_validate()
def prompt_exercise(number=1, **kwrd):
    try:
        kwrd["name"]
    except KeyError:
        print(HTML("<b>Nouvel exercice</b>"))
    else:
        print(HTML(f"<b>Modification de l'exercice: {kwrd['name']}</b>"))

    exercise = {}
    exercise["name"] = prompt(
        "Nom de l'exercice: ", default=kwrd.get("name", f"Exercice {number}")
    )

    exercise["questions"] = []

    try:
        kwrd["questions"][0]
    except KeyError:
        last_question_id = "1a"
    except IndexError:
        last_question_id = "1a"
    else:
        for ques in kwrd["questions"]:
            try:
                exercise["questions"].append(prompt_question(**ques))
            except CancelError:
                print("Cette question a été supprimée")
        last_question_id = exercise["questions"][-1]["id"]

    appending = prompt_validate(
        question="Ajouter un élément de notation? ", style="appending"
    )
    while appending:
        try:
            exercise["questions"].append(prompt_question(last_question_id))
        except CancelError:
            print("Cette question a été supprimée")
        else:
            last_question_id = exercise["questions"][-1]["id"]
        appending = prompt_validate(
            question="Ajouter un élément de notation? ", style="appending"
        )

    return exercise


@prompt_until_validate(cancelable=True)
def prompt_question(last_question_id="1a", **kwrd):
    try:
        kwrd["id"]
    except KeyError:
        print(HTML("<b>Nouvel élément de notation</b>"))
    else:
        print(
            HTML(
                f"<b>Modification de l'élément {kwrd['id']} ({kwrd['commentaire']})</b>"
            )
        )

    question = {}
    question["id"] = prompt(
        "Identifiant de la question: ",
        default=kwrd.get("id", "1a"),
    )

    question["competence"] = prompt(
        "Competence: ",
        default=kwrd.get("competence", "Cal"),
        # validate
        # completer
    )

    question["theme"] = prompt(
        "Domaine: ",
        default=kwrd.get("theme", ""),
        # completer
    )

    question["comment"] = prompt(
        "Commentaire: ",
        default=kwrd.get("comment", ""),
    )

    question["is_leveled"] = prompt(
        "Évaluation par niveau: ",
        default=kwrd.get("is_leveled", "1"),
        # validate
    )

    question["score_rate"] = prompt(
        "Barème: ",
        default=kwrd.get("score_rate", "1"),
        # validate
    )

    return question