#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright (C) 2012 Étienne Loks  <etienne.loks_AT_peacefrogsDOTnet>

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# See the file COPYING for details.

from ajax_select import make_ajax_form

from django import forms
from django.conf import settings
from django.conf.urls import url
from django.core.urlresolvers import reverse
from django.http import HttpResponseRedirect
from django.shortcuts import get_object_or_404, render
from django.utils.translation import ugettext_lazy as _

from ishtar_common.apps import admin_site
from ishtar_common.admin import (
    HistorizedObjectAdmin,
    GeneralTypeAdmin,
    export_as_csv_action,
    serialize_type_action,
    ImportActionAdmin,
)

from . import models


class FileAdmin(HistorizedObjectAdmin):
    list_display = ["year", "numeric_reference", "file_type", "name"]
    if settings.COUNTRY == "fr":
        list_display += ["saisine_type", "permit_reference"]
    list_filter = ["file_type", "year"]
    if settings.COUNTRY == "fr":
        list_filter += ["saisine_type"]
    search_fields = ("name", "towns__name", "permit_reference")
    ajax_form_dict = HistorizedObjectAdmin.AJAX_FORM_DICT.copy()
    ajax_form_dict.update(
        {
            "in_charge": "person",
            "general_contractor": "person",
            "corporation_general_contractor": "organization",
            "responsible_town_planning_service": "person",
            "planning_service": "organization",
            "organization": "organization",
            "scientist": "person",
            "main_town": "town",
            "towns": "town",
            "related_file": "file",
        }
    )
    form = make_ajax_form(models.File, ajax_form_dict)
    readonly_fields = HistorizedObjectAdmin.readonly_fields + [
        "raw_general_contractor",
        "raw_town_planning_service",
        "cached_label",
        "imported_line",
    ]
    exclude = ["documents", "main_image"]
    model = models.File


admin_site.register(models.File, FileAdmin)


general_models = [
    models.FileType,
    models.PermitType,
    models.GenericEquipmentServiceType,
    models.OperationTypeForRoyalties,
    models.AgreementType
]
if settings.COUNTRY == "fr":
    general_models.append(models.SaisineType)
for model in general_models:
    admin_site.register(model, GeneralTypeAdmin)


class JobAdmin(GeneralTypeAdmin):
    list_filter = ("available", "price_agreement")
    LIST_DISPLAY = [
        "label",
        "price_agreement",
        "permanent_contract",
        "order",
        "ground_daily_cost",
        "daily_cost",
        "default_daily_need_on_ground",
        "default_daily_need",
        "child",
        "available",
    ]


admin_site.register(models.Job, JobAdmin)


class EquipmentServiceTypeAdmin(GeneralTypeAdmin):
    list_filter = ("available", "generic_equipment_type")


admin_site.register(models.EquipmentServiceType, EquipmentServiceTypeAdmin)


class EquipmentServiceCostAdmin(ImportActionAdmin):
    search_fields = (
        "equipment_service_type__label",
        "service_provider",
    )
    list_filter = ("available", "price_agreement")
    list_display = [
        "equipment_service_type",
        "price_agreement",
        "specificity",
        "parent",
        "unitary_cost",
        "unit",
        "flat_rate",
        "default_quantity_by_day",
        "available",
    ]
    actions = [export_as_csv_action(), serialize_type_action]
    model = models.EquipmentServiceCost


admin_site.register(models.EquipmentServiceCost, EquipmentServiceCostAdmin)


class CopyPriceForm(forms.Form):
    source = forms.ChoiceField(
        label=_("Copy from"),
        choices=[],
    )
    destination = forms.ChoiceField(
        label=_("To"),
        choices=[],
    )

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        choices = [
            (idx, label)
            for idx, label in models.PriceAgreement.objects.values_list("id", "label")
        ]
        self.fields["source"].choices = choices
        self.fields["destination"].choices = choices

    def clean(self):
        if self.cleaned_data.get("source", None) \
                == self.cleaned_data.get("destination", None):
            raise forms.ValidationError(
                _("Source and destination must be different.")
            )
        return self.cleaned_data


class CopyPriceAgreementAdmin(GeneralTypeAdmin):
    change_list_template = "admin/copy_price_change_list.html"

    def get_urls(self):
        urls = super(CopyPriceAgreementAdmin, self).get_urls()
        my_urls = [
            url(r"^copy-price-agreement/$", self.copy_price_agreement),
        ]
        return my_urls + urls

    def copy_price_agreement(self, request):
        form = None

        if "apply" in request.POST:
            form = CopyPriceForm(request.POST)
            if form.is_valid():
                created, already_here = 0, 0
                source = get_object_or_404(
                    models.PriceAgreement, pk=form.cleaned_data["source"]
                )
                destination = get_object_or_404(
                    models.PriceAgreement, pk=form.cleaned_data["destination"]
                )
                for model, slug_name in ((models.Job, "txt_idx"),
                                         (models.EquipmentServiceCost, "slug")):
                    items = model.objects.filter(price_agreement_id=source.pk).all()
                    for item in items:
                        slug = getattr(item, slug_name).split("--")[0] + "--" + \
                               str(source.pk)
                        q = model.objects.filter(**{slug_name: slug})
                        if q.count():
                            already_here += 1
                            continue
                        new_item = item
                        new_item.pk = None
                        setattr(new_item, slug_name, slug)
                        new_item.price_agreement_id = destination.pk
                        new_item.save()
                        created += 1
                if created:
                    self.message_user(
                        request, str(_("{} item(s) created.")).format(created)
                    )
                if already_here:
                    self.message_user(
                        request, str(_("{} item(s) already in database.")).format(
                            already_here)
                    )
                c_url = reverse(
                    "admin:{}_{}_changelist".format(
                        self.model._meta.app_label, self.model._meta.model_name
                    )
                )
                return HttpResponseRedirect(c_url)
        if not form:
            form = CopyPriceForm()
        return render(
            request,
            "admin/copy_price.html",
            {"file_form": form, "current_action": "import_generic"},
        )


class PriceAgreementAdmin(CopyPriceAgreementAdmin):
    list_filter = ("available",)
    extra_list_display = [
        "start_date",
        "end_date",
    ]
    actions = []
    model = models.PriceAgreement


admin_site.register(models.PriceAgreement, PriceAgreementAdmin)