from django import forms
from django.urls import reverse, reverse_lazy
from django.utils.translation import ugettext as _
from django.utils.safestring import mark_safe

from crispy_forms.helper import FormHelper
from crispy_forms.layout import Submit, Layout, HTML, Fieldset, Div
from crispy_forms.bootstrap import Tab, TabHolder, PrependedText, FormActions
from dal import autocomplete
from leaflet.forms.widgets import LeafletWidget

from apps.files.models import File, ImageFile

from .models import CaseStudy, SpatialRefSys, PointOfInterest
from .widgets import JSONFileListWidget


SECTOR_HELP = {
    'RN': _("including electricity, heat or combined heat and power generation"),
    'PG': '',
    'ST': _('Biological, chemical, electrical, electromagnetic, electrochemical, mechanical including gravitational potential, thermal etc.'),
    'SM': _("including supply of minerals"),
    'MA': '',
}

POWER_TECHNOLOGY_HELP = {
    'PT': _('Lines, transformers, machinery etc.'),
    'HN': _('District heating/cooling, etc.'),
    'OT': '',
}

def add_explanatory_text(model_choices, explanatory_text):
    return [
        (
            choice[0],
            mark_safe('<b>%s</b><br><span class="text-muted">%s</span>' %
                (choice[1], explanatory_text[choice[0]])
            )
        ) for choice in model_choices
    ]



class MinimumZoomWidget(LeafletWidget):
    geometry_field_class = 'MinimumZoomField'


class PointOfInterest(forms.models.ModelForm):
    def __init__(self, *args, **kwargs):
        super(PointOfInterest, self).__init__(*args, **kwargs)
        self.helper = FormHelper(self)
        self.helper.form_id = 'case-study-form'
        self.helper.form_class = 'form-horizontal'
        self.helper.form_method = 'post'
        self.helper.form_action = 'add'
        self.helper.label_class = 'col-lg-2'
        self.helper.field_class = 'col-lg-10'
        self.helper.include_media = False

        self.helper.form_action = reverse('point-of-interest-form')
        self.helper.add_input(Submit('submit', _('Submit'), css_class='btn-success center-block'))

    class Meta:
        model = PointOfInterest

        widgets = {
            'location': MinimumZoomWidget(attrs={
                'settings_overrides': {
                    'SCALE': False
                }
            }),
        }

        fields = [
            'title',
            'location',
            'synopsis',
            'link',
        ]


class BaseCaseStudyForm(forms.models.ModelForm):
    """Base form class for the CaseStudy model."""

    def __init__(self, *args, **kwargs):
        super(BaseCaseStudyForm, self).__init__(*args, **kwargs)
        self.helper = FormHelper(self)
        self.helper.form_id = 'case-study-form'
        self.helper.form_class = 'form-horizontal'
        self.helper.form_method = 'post'
        self.helper.label_class = 'col-md-3'
        self.helper.field_class = 'col-md-9'
        self.helper.include_media = False

    class Meta:
        model = CaseStudy
        fields = '__all__'
        widgets = {
            'location': MinimumZoomWidget(attrs={
                'settings_overrides': {
                    'SCALE': False
                }
            }),
        }


class ShortCaseStudyForm(BaseCaseStudyForm):
    """Short version of the CaseStudy form."""

    def __init__(self, *args, **kwargs):
        super(ShortCaseStudyForm, self).__init__(*args, **kwargs)
        self.helper.add_input(Submit('submit', _('Submit'), css_class='btn-success center-block'))

        # Duplicate code from long form, below...
        self.fields['sector_of_economy'] = forms.ChoiceField(
            widget=forms.RadioSelect(),
            choices=add_explanatory_text(
                CaseStudy.SECTOR_CHOICES,
                SECTOR_HELP
            ),
            required=False
        )

    class Meta(BaseCaseStudyForm.Meta):
        fields = [
            'entry_name',
            'location',
            'sector_of_economy',
            'positive_or_negative',
            'country',
            'area_of_land',
            'land_ownership',
            'land_ownership_details',
            'location_context',
            'type_of_ecosystem',
            'describe_ecosystem',
            'affected_communities',
            'project_status',
            'synopsis',
            'full_description',
            'video',
            'media_coverage_mainstream',
            'media_coverage_independent',
            'community_voices'
        ]


class BootstrapClearableFileInput(forms.ClearableFileInput):
    template_name = 'map/forms/widgets/file.html'


class LongCaseStudyForm(BaseCaseStudyForm):
    """Long version of the CaseStudy form."""

    images = forms.FileField(
        widget=BootstrapClearableFileInput(attrs={
            'url': reverse_lazy('files:upload'),
            'field': 'images_files',
        }), required=False
    )

    images_files = forms.ModelMultipleChoiceField(
        queryset=ImageFile.objects.all(),
        widget=JSONFileListWidget(),
        required=False
    )

    official_project_documents = forms.FileField(
        widget=BootstrapClearableFileInput(attrs={
            'url': reverse_lazy('files:upload'),
            'field': 'official_project_documents_files',
        }), required=False
    )

    official_project_documents_files = forms.ModelMultipleChoiceField(
        queryset=File.objects.all(),
        widget=JSONFileListWidget(),
        required=False
    )

    other_documents = forms.FileField(
        widget=BootstrapClearableFileInput(attrs={
            'url': reverse_lazy('files:upload'),
            'field': 'other_documents_files',
        }), required=False
    )

    other_documents_files = forms.ModelMultipleChoiceField(
        queryset=File.objects.all(),
        widget=JSONFileListWidget(),
        required=False
    )

    shapefiles = forms.FileField(
        widget=BootstrapClearableFileInput(attrs={
            'url': reverse_lazy('files:upload'),
            'field': 'shapefiles_files',
        }), required=False
    )

    shapefiles_files = forms.ModelMultipleChoiceField(
        queryset=File.objects.all(),
        widget=JSONFileListWidget(),
        required=False
    )

    coordinate_reference_system = forms.ModelChoiceField(
        queryset=SpatialRefSys.objects.all(),
        widget=autocomplete.ModelSelect2(url='srs-autocomplete'),
        initial=4326,
    )

    def __init__(self, *args, **kwargs):
        super(LongCaseStudyForm, self).__init__(*args, **kwargs)

        self.fields['positive_case_type'].label = ""
        self.fields['negative_case_reasons'].label = ""

        self.fields['sector_of_economy'] = forms.ChoiceField(
            widget=forms.RadioSelect(),
            choices=add_explanatory_text(
                CaseStudy.SECTOR_CHOICES,
                SECTOR_HELP
            ),
            required=False
        )

        self.fields['power_technology'] = forms.ChoiceField(
            widget=forms.RadioSelect(),
            choices=add_explanatory_text(
                CaseStudy.POWER_TECHNOLOGY_CHOICES,
                POWER_TECHNOLOGY_HELP
            ),
            required=False
        )

        self.fields['project_owners'].required = True
        self.fields['shareholders'].required = True


        self.fields['socioeconomic_benefits'].label = \
            '<span class="organising organising-vs">' + \
                _('Socio-environmental impacts (negative and potentially positive)') + \
            '</span>' + \
            '<span class="organising organising-pro">' + \
                _('Socio-environmental impacts (positive and potentially negative)') + \
            '</span>' + \
            '<span class="organising organising-none organising-idk">' + \
                _('Socio-environmental impacts (positive and negative)') + \
            '</span>'

        self.fields['socioeconomic_benefits'].help_text = \
            '<span class="organising organising-none organising-idk">' + \
            _('Please expand on your response given in the full description on page one. \
            We would expect benefits to go beyond emissions savings, paying rent for land, \
            or complying with environmental or social legislation.  Please include other \
            reasons, noting that we aim to focus on projects with substantive impacts on \
            vulnerable groups.') + \
            '</span>' + \
            '<span class="organising organising-vs">' + \
            _('Please expand on your response given in the description. Note that we aim to \
            focus on violation of land rights / human rights / collective rights, substantive \
            negative impacts on vulnerable groups, aggression / threats / violence, \
            severe environmental and/or cultural impacts, abusive labor practices, and \
            corruption / governance issues, but feel free to cover any additional aspect \
            that you consider relevant. Please also describe and analyze socio-environmental \
            impacts that could be presented or considered as positive.') + \
            '</span>' + \
            '<span class="organising organising-pro">' + \
            _('Please expand on your response given in the description. Please also describe \
            and analyze socio-environmental impacts that could be considered as negative.') + \
            '</span>'

        self.helper.form_action = reverse('long-form')
        self.helper.layout = Layout(
            TabHolder(
                Tab(_("Basic information"),
                    'entry_name',
                    'location',
                    'country',
                    'shapefiles',
                    'shapefiles_files',
                    'coordinate_reference_system',
                    'name_of_territory_or_area',
                    'area_of_land',
                    'land_ownership',
                    'land_ownership_details',
                    'location_context',
                    'type_of_ecosystem',
                    'describe_ecosystem',
                    'affected_communities',
                    'people_affected_other',
                    'project_status',
                    'start_year',
                    'completion_year',
                    'synopsis',
                    'full_description',
                    'images',
                    'images_files',
                    'video',
                    'video_caption',
                    'video_credit',
                    Fieldset(
                        _("Ownership and finance"),
                        'project_owners',
                        'consultants_contractors',
                        'shareholders',
                        'financial_institutions',
                        'financial_institutions_other',
                    ),
                    Fieldset(
                        _("Media reports and other communications"),
                        'media_coverage_mainstream',
                        'media_coverage_independent',
                        'community_voices',
                        'direct_comms',
                        'social_media_links'
                    ),
                    FormActions(
                        HTML("<a class='btn btn-primary btnNext pull-right'>"+_("Next")+"</a>")
                    )
                ),
                Tab(
                    _("Technical and economic analysis"),
                    'sector_of_economy',
                    Div(
                        'generation_type',
                        'generation_technology',
                        css_class='power_generation_questions'
                    ),
                    Div(
                        'power_technology',
                        css_class='energy_network_questions'
                    ),
                    Div(
                        'energy_details',
                        css_class='energy_generation_network_and_storage_questions'
                    ),
                    Div(
                        'biomass_detail',
                        'total_generation_capacity',
                        css_class='power_generation_questions'
                    ),
                    Div(
                        'energy_transmission_capacity',
                        css_class='energy_network_questions'
                    ),
                    Div(
                        'energy_storage_capacity',
                        css_class='energy_storage_questions'
                    ),
                    Div(
                        PrependedText('total_investment', 'USD $'),
                        'contractor_or_supplier_of_technology',
                        'energy_customers',
                        'additional_technical_details',
                        css_class='energy_generation_network_and_storage_questions'
                    ),

                    Div(
                        'minerals_or_commodities',
                        'minerals_or_commodities_other',
                        'use_in_energy_economy',
                        'use_in_energy_economy_other',
                        'project_life_span',
                        'size_of_concessions',
                        'projected_production_of_commodities',
                        'type_of_extraction',
                        'associated_infrastructure',
                        css_class="mineral_commodity_questions"
                    ),
                    Div(
                        'manufacturing_type',
                        'manufacturing_description',
                        'manufacturing_related_tech',
                        'manufacturing_factors',
                        'manufacturing_factors_description',
                        'manufacturing_ownership',
                        css_class="manufacturing_questions"
                    ),
                    FormActions(
                        HTML("<a class='btn btn-primary btnPrevious'>"+_("Previous")+"</a>"),
                        HTML("<a class='btn btn-primary btnNext pull-right'>"+_("Next")+"</a>")
                    )
                ),
                Tab(
                    _("Socio-environmental analysis"),
                    HTML("<p>" + _("In the following, we expect the analysis to reflect the perspective of the organization(s) or person(s) describing the case.") + "</p>"),
                    'positive_or_negative',
                    Div(
                        HTML("<label class='col-md-3 control-label'>What kind of case is this entry about?</label>"),
                        Div(
                            'positive_case_type',
                            'negative_case_reasons',
                            css_class='col-md-9',
                        ),
                        css_class='form-group',
                    ),
                    'negative_case_reasons_other',
                    'socioeconomic_benefits',
                    'isolated_or_widespread',
                    'key_actors_involved',
                    'project_status_detail',
                    'obstacles_and_hindrances',
                    'negative_socioenvironmental_impacts',
                    'when_did_organising_start',
                    'who_has_been_involved',
                    'participation_mechanisms',
                    'identified_partnerships',
                    'wants_conversation_with_ojuso',
                    Div(
                        css_class="common_questions"
                    ),
                    FormActions(
                        HTML("<a class='btn btn-primary btnPrevious'>"+_("Previous")+"</a>"),
                        HTML("<a class='btn btn-primary btnNext pull-right'>"+_("Next")+"</a>")
                    )
                ),
                Tab(
                    _("Contact details"),
                    'contact_email',
                    'contact_phone',
                    'contact_website',
                    PrependedText('contact_twitter', '@', placeholder='username'),
                    'contact_facebook',
                    'contact_other',
                    'shown_on_other_platforms',
                    'shown_on_other_platforms_detail',
                    FormActions(
                        HTML("<a class='btn btn-primary btnPrevious'>"+_("Previous")+"</a>"),
                        HTML("<a class='btn btn-primary btnNext pull-right'>"+_("Next")+"</a>")
                    )
                ),
                Tab(
                    _("Uploads"),
                    'official_project_documents',
                    'official_project_documents_files',
                    'other_documents',
                    'other_documents_files',
                    FormActions(
                        HTML("<a class='btn btn-primary btnPrevious'>"+_("Previous")+"</a>"),
                        Submit('submit', _('Submit'), css_class="btn-success pull-right")
                    )
                )))

    class Meta(BaseCaseStudyForm.Meta):
        exclude = ('approved',)

    class Media:
        js = (
            'files/upload.js',
        )