# -*- coding: utf-8 -*-


from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals

from django.forms import widgets
from django.template import loader, Context
from django.utils.encoding import force_text

from rapid.wrappers import ModelData

_templates_root = 'rapid/widgets/'


class RapidReadOnly(widgets.Widget):
    def render(self, name, value, attrs=None):
        hidden = '<input type="hidden" name="%s" value="%s" ' % (name, value if value else "")
        for a in attrs.keys():
            hidden += '%s="%s" ' % (a, attrs[a])
        hidden += '>'
        return '<span class="data-value">%s</span>%s\n' % (force_text(value), hidden)

    def value_from_datadict(self, data, files, name):
        return data.get(name)


def getRapidReadonlyRelation(model, originator):
    class RapidRelationReadOnly(widgets.Widget):
        def render(self, name, value, attrs=None):
            hidden = '<input type="hidden" name="%s" value="%s" ' % (name, value if value else "")
            for a in attrs.keys():
                hidden += '%s="%s" ' % (a, attrs[a])
            hidden += '>'
            if hasattr(value, '__iter__'):
                obj = model.default_manager().filter(pk__in=value)
                ret = ''
                for o in obj:
                    ret += '<span class="data-value multiple">%s</span>\n' % force_text(o)
                ret += hidden
                return ret
            else:
                if value:
                    obj = model.default_manager().get(pk=value)
                else:
                    obj = ""
                return '<span class="data-value">%s</span>%s\n' % (force_text(obj), hidden)

        def value_from_datadict(self, data, files, name):
            return originator
    return RapidRelationReadOnly

class RapidSelector(widgets.Select):
    """
    Selects one of the target crud type.
    For ForeignKeyFields and OneToOneFields.
    If the target is dependent (that means, has only
    value when linked with this object), only displays
    an edition link.
    """
    def __init__(self, relation, *args, **kwargs):
        super(RapidSelector, self).__init__(*args, **kwargs)
        self.relation = relation
        self.allow_multiple_selected = relation.is_multiple()
        self.remove_deselected = relation.is_existential_dependency()

    def render(self, name, value, attrs=None, choices=()):
        tp_id = attrs.get('id', name)
        related = self.relation.related_model()
        if self.allow_multiple_selected:
            if value:
                v = ",".join([str(x) for x in value])
                selected = related.default_manager().filter(pk__in=value)
            else:
                v = ""
                selected = []
        else:
            if value:
                v = str(value)
                selected = related.default_manager().get(pk=value)
            else:
                v = ""
                selected = ""
        select_url = related.select_url()
        if self.allow_multiple_selected:
            icon = 'fa-times'
            if self.remove_deselected:
                icon = 'fa-trash-o'
        else:
            icon = 'fa-search'
        c = Context({'id': tp_id, 'name': name, 'value': v, 'selected': selected, 'icon': icon,
                     'select_url': select_url, 'multiple': self.allow_multiple_selected})
        if self.allow_multiple_selected:
            t = loader.get_template(_templates_root + 'multiple-selector.html')
        else:
            t = loader.get_template(_templates_root + 'single-selector.html')
        return t.render(c)

    def value_from_datadict(self, data, files, name):
        val = data.get(name)
        if self.allow_multiple_selected:
            if val:
                return [int(x) for x in val.split(",") if x]
            return []
        else:
            if val:
                return int(val)
            return None


def rapid_alternatives_widget(alternatives, selector):
    class RapidAlternativeFormsWidget(widgets.Widget):
        def render(self, name, value, attrs=None):
            attrs = attrs if attrs else []
            c = Context({'name': name,
                         'value': value,
                         'attrs': attrs,
                         'alternatives': alternatives.values(),
                         'selector': selector,
                         })
            t = loader.get_template(_templates_root + 'alternativeForms.html')
            return t.render(c)

        def value_from_datadict(self, data, files, name):
            ct_id = data.get(selector)
            if not ct_id:
                return None
            return alternatives.get(int(ct_id))[1]

    return RapidAlternativeFormsWidget


def rapid_dependent_widget(model_data, form, has_instance, is_mutiple):
    class RapidDependentWidget(widgets.Widget):
        # What to ask:
        # Is it optional? Yep, if it's dependent, it must be optional
        # Is it multiple? In is_multiple
        def render(self, name, value, attrs=None):
            attrs = attrs if attrs else []
            c = Context({'name': name,
                         'value': value,
                         'attrs': attrs,
                         'model': model_data,
                         'formset': form,
                         }) if is_mutiple else Context (
                {'name': name,
                 'value': value,
                 'attrs': attrs,
                 'model': model_data,
                 'form': form,
                 'present': has_instance,
                 })
            t = loader.get_template(_templates_root + ('multipleDependent.html' if
                                    is_mutiple else 'singleDependent.html'))
            return t.render(c)

        def value_from_datadict(self, data, files, name):
            # Might return:
            # None of model object if not is_multiple
            # [] ot list of model objects if is_multiple
            if is_mutiple:
                list_includes = [x for x in range(0, len(form)) if data.get("includes_" + form.prefix + "-" + str(x))]
                return (form, list_includes)
            else:
                s = data.get("includes_" + name)
                if s is None:
                    return None
                else:
                    return form

    return RapidDependentWidget