import django_tables2 as tables
from django.utils.safestring import mark_safe


class BaseTable(tables.Table):
    """
    Default table for object lists
    """
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        # Set default empty_text if none was provided
        if self.empty_text is None:
            self.empty_text = 'No {} found'.format(self._meta.model._meta.verbose_name_plural)

    class Meta:
        attrs = {
            'class': 'table table-hover table-headings',
        }


class ToggleColumn(tables.CheckBoxColumn):
    """
    Extend CheckBoxColumn to add a "toggle all" checkbox in the column header.
    """
    def __init__(self, *args, **kwargs):
        default = kwargs.pop('default', '')
        visible = kwargs.pop('visible', False)
        if 'attrs' not in kwargs:
            kwargs['attrs'] = {
                'td': {
                    'class': 'min-width'
                }
            }
        super().__init__(*args, default=default, visible=visible, **kwargs)

    @property
    def header(self):
        return mark_safe('<input type="checkbox" class="toggle" title="Toggle all" />')


class BooleanColumn(tables.Column):
    """
    Custom implementation of BooleanColumn to render a nicely-formatted checkmark or X icon instead of a Unicode
    character.
    """
    def render(self, value):
        if value is True:
            rendered = '<span class="text-success"><i class="fa fa-check"></i></span>'
        elif value is False:
            rendered = '<span class="text-danger"><i class="fa fa-close"></i></span>'
        else:
            rendered = '<span class="text-muted">&mdash;</span>'
        return mark_safe(rendered)


class ColorColumn(tables.Column):
    """
    Display a color (#RRGGBB).
    """
    def render(self, value):
        return mark_safe(
            '<span class="label color-block" style="background-color: #{}">&nbsp;</span>'.format(value)
        )