from flask_wtf import FlaskForm
from flask_wtf.file import FileAllowed, FileField, FileRequired, FileSize
from wtforms import (IntegerField, SelectField, StringField, SubmitField,
                     validators)
from wtforms.validators import (DataRequired, Length, NumberRange,
                                ValidationError)

from app import settings


class UploadForm(FlaskForm):
    """File upload class for a new site in distribusi-verse"""

    def distribusiname(form, field):
        if field.data.lower() == "new":
            raise ValidationError("Name has to be unique and not just new.")

    def category_choices():
        APP = settings()
        config_categories = APP.config["categories"]
        categories = []
        for config_category in config_categories:
            categories.append((config_category, config_category))
        return categories

    def year_choices():
        APP = settings()
        start_time = APP.config["start_time"]
        end_time = APP.config["end_time"]
        year_range = range(start_time.year, end_time.year, 1)
        year_choices = []
        for year in year_range:
            year_choices.append((str(year), str(year)))
        return year_choices


    sitename = StringField(
        "Name of your archive section:",
        validators=[
            validators.InputRequired(),
            Length(2, 100),
            distribusiname,
        ],
    )
    year = SelectField(
        "Year:",
        validate_choice=True,
        coerce=str,
        choices=year_choices,
        option_widget=None,
        validators=[DataRequired()],
    )
    category = SelectField(
        "Category:",
        validate_choice=True,
        coerce=str,
        choices=category_choices,
        option_widget=None,
        validators=[DataRequired()],
    )
    tags = StringField(
        "Add tags, seperated by commas. No need for the '#' sign:",
        validators=[validators.InputRequired(), Length(2, 500)],
    )

    zipfile = FileField(
        "Upload your zip file with content here:",
        validators=[
            FileAllowed(["zip"], "Zip archives only!"),
            FileRequired(),
            FileSize(
                max_size=104857600,
                message="Zipfile size must be smaller than 100MB",
            ),
        ],
    )

    submit = SubmitField("Upload")