from flask_wtf import FlaskForm
from wtforms import DateField, IntegerField, DecimalField, SubmitField

from .checks import *


class DeletePitStopForm(FlaskForm):
    submit = SubmitField(label='Really delete this pitstop!')


class EditPitstopForm(FlaskForm):
    date = DateField('Date of Pitstop', validators=[date_check])
    odometer = IntegerField('Odometer (km)', validators=[odometer_check])
    litres = DecimalField('Litres (l)', places=2, validators=[litres_check])
    costs = DecimalField('Costs (€, overall)', places=2, validators=[edit_costs_check])
    submit = SubmitField(label='Update it!')
    last_pitstop = None
    same_odometer_allowed = True

    def set_pitstop(self, last_pitstop):
        self.last_pitstop = last_pitstop

    def set_consumable(self, consumable):
        self.litres.label = '%s (%s)' % (consumable.name, consumable.unit)

    def preinit_with_data(self):
        if self.date.data:
            self.date.default = self.date.data
        if self.odometer.data:
            self.odometer.default = self.odometer.data
        if self.litres.data:
            self.litres.default = self.litres.data
        if self.costs.data:
            self.costs.default = self.costs.data


class CreatePitstopForm(FlaskForm):
    date = DateField('Date of Pitstop', validators=[date_check])
    odometer = IntegerField('Odometer (km)', validators=[odometer_check])
    litres = DecimalField('Litres (l)', places=2, validators=[litres_check])
    costs = DecimalField('Costs (€, overall)', places=2, validators=[costs_check])
    submit = SubmitField(label='Do it!')
    last_pitstop = None
    same_odometer_allowed = True

    def set_pitstop(self, last_pitstop):
        self.last_pitstop = last_pitstop

    def set_consumable(self, consumable):
        self.litres.label = '%s (%s)' % (consumable.name, consumable.unit)

    def preinit_with_data(self):
        if self.date.data:
            self.date.default = self.date.data
        else:
            self.date.default = date.today()
        if self.odometer.data:
            self.odometer.default = self.odometer.data
        else:
            self.odometer.default = self.last_pitstop.odometer
        if self.litres.data:
            self.litres.default = self.litres.data
        else:
            self.litres.default = self.last_pitstop.amount
        if self.costs.data:
            self.costs.default = self.costs.data
        else:
            self.costs.default = self.last_pitstop.costs

    def get_hint_messages(self):
        if self.same_odometer_allowed:
            or_equal = ' or equal to'
        else:
            or_equal = ''
        messages = {
            'date': 'Date must be between %s and %s (including).' % (str(self.last_pitstop.date), str(date.today())),
            'odometer': 'Odometer must be greater than%s %s km.' % (or_equal, str(self.last_pitstop.odometer)),
            'costs': 'Costs must be higher than 0.01 €.'
        }
        return messages