from django.forms import SelectMultiple

from .base import WidgetTest


class SelectMultipleTest(WidgetTest):
    widget = SelectMultiple
    numeric_choices = (('0', '0'), ('1', '1'), ('2', '2'), ('3', '3'), ('0', 'extra'))

    def test_format_value(self):
        widget = self.widget(choices=self.numeric_choices)
        self.assertEqual(widget.format_value(None), [])
        self.assertEqual(widget.format_value(''), [''])
        self.assertEqual(widget.format_value([3, 0, 1]), ['3', '0', '1'])

    def test_render_selected(self):
        self.check_html(self.widget(choices=self.beatles), 'beatles', ['J'], html=(
            """<select multiple="multiple" name="beatles">
            <option value="J" selected>John</option>
            <option value="P">Paul</option>
            <option value="G">George</option>
            <option value="R">Ringo</option>
            </select>"""
        ))

    def test_render_multiple_selected(self):
        self.check_html(self.widget(choices=self.beatles), 'beatles', ['J', 'P'], html=(
            """<select multiple="multiple" name="beatles">
            <option value="J" selected>John</option>
            <option value="P" selected>Paul</option>
            <option value="G">George</option>
            <option value="R">Ringo</option>
            </select>"""
        ))

    def test_render_none(self):
        """
        If the value is None, none of the options are selected, even if the
        choices have an empty option.
        """
        self.check_html(self.widget(choices=(('', 'Unknown'),) + self.beatles), 'beatles', None, html=(
            """<select multiple name="beatles">
            <option value="">Unknown</option>
            <option value="J">John</option>
            <option value="P">Paul</option>
            <option value="G">George</option>
            <option value="R">Ringo</option>
            </select>"""
        ))

    def test_render_value_label(self):
        """
        If the value corresponds to a label (but not to an option value), none
        of the options are selected.
        """
        self.check_html(self.widget(choices=self.beatles), 'beatles', ['John'], html=(
            """<select multiple="multiple" name="beatles">
            <option value="J">John</option>
            <option value="P">Paul</option>
            <option value="G">George</option>
            <option value="R">Ringo</option>
            </select>"""
        ))

    def test_multiple_options_same_value(self):
        """
        Multiple options with the same value can be selected (#8103).
        """
        self.check_html(self.widget(choices=self.numeric_choices), 'choices', ['0'], html=(
            """<select multiple="multiple" name="choices">
            <option value="0" selected>0</option>
            <option value="1">1</option>
            <option value="2">2</option>
            <option value="3">3</option>
            <option value="0" selected>extra</option>
            </select>"""
        ))

    def test_multiple_values_invalid(self):
        """
        If multiple values are given, but some of them are not valid, the valid
        ones are selected.
        """
        self.check_html(self.widget(choices=self.beatles), 'beatles', ['J', 'G', 'foo'], html=(
            """<select multiple="multiple" name="beatles">
            <option value="J" selected>John</option>
            <option value="P">Paul</option>
            <option value="G" selected>George</option>
            <option value="R">Ringo</option>
            </select>"""
        ))

    def test_compare_string(self):
        choices = [('1', '1'), ('2', '2'), ('3', '3')]

        self.check_html(self.widget(choices=choices), 'nums', [2], html=(
            """<select multiple="multiple" name="nums">
            <option value="1">1</option>
            <option value="2" selected>2</option>
            <option value="3">3</option>
            </select>"""
        ))

        self.check_html(self.widget(choices=choices), 'nums', ['2'], html=(
            """<select multiple="multiple" name="nums">
            <option value="1">1</option>
            <option value="2" selected>2</option>
            <option value="3">3</option>
            </select>"""
        ))

        self.check_html(self.widget(choices=choices), 'nums', [2], html=(
            """<select multiple="multiple" name="nums">
            <option value="1">1</option>
            <option value="2" selected>2</option>
            <option value="3">3</option>
            </select>"""
        ))

    def test_optgroup_select_multiple(self):
        widget = SelectMultiple(choices=(
            ('outer1', 'Outer 1'),
            ('Group "1"', (('inner1', 'Inner 1'), ('inner2', 'Inner 2'))),
        ))
        self.check_html(widget, 'nestchoice', ['outer1', 'inner2'], html=(
            """<select multiple="multiple" name="nestchoice">
            <option value="outer1" selected>Outer 1</option>
            <optgroup label="Group &quot;1&quot;">
            <option value="inner1">Inner 1</option>
            <option value="inner2" selected>Inner 2</option>
            </optgroup>
            </select>"""
        ))

    def test_value_omitted_from_data(self):
        widget = self.widget(choices=self.beatles)
        self.assertIs(widget.value_omitted_from_data({}, {}, 'field'), False)
        self.assertIs(widget.value_omitted_from_data({'field': 'value'}, {}, 'field'), False)
