from otree.api import *

from session_utils import merge_t, texts_for

doc = """
Consent form and General Instructions.
"""


class C(BaseConstants):
    NAME_IN_URL = 'consent'
    PLAYERS_PER_GROUP = None
    NUM_ROUNDS = 1


class Subsession(BaseSubsession):
    pass


def creating_session(subsession):
    if subsession.round_number == 1:
        lang = subsession.session.config.get('language', 'en')
        for p in subsession.get_players():
            p.participant.vars['language'] = lang
            p.participant.session_language = lang


class Group(BaseGroup):
    pass


class Player(BasePlayer):
    consent_given = models.BooleanField(
        label="",
        widget=widgets.CheckboxInput,
        initial=False,
    )


class ConsentPage(Page):
    form_model = 'player'
    form_fields = ['consent_given']

    @staticmethod
    def vars_for_template(player):
        return merge_t(player)

    @staticmethod
    def error_message(player, values):
        if not values['consent_given']:
            return texts_for(player)['consent_error']


class GeneralInstructions(Page):
    @staticmethod
    def vars_for_template(player):
        return merge_t(player)


page_sequence = [ConsentPage, GeneralInstructions]