from django.contrib import admin, messages
from django.utils.translation import gettext_lazy as _

from orchestra.admin import ExtendedModelAdmin, ChangePasswordAdminMixin
from orchestra.admin.actions import disable, enable
from orchestra.contrib.accounts.actions import list_accounts
from orchestra.contrib.accounts.admin import SelectAccountAdminMixin
from orchestra.contrib.accounts.filters import IsActiveListFilter

from .actions import set_permission, create_link
from .filters import IsMainListFilter
from .forms import SystemUserCreationForm, SystemUserChangeForm, WebappUserChangeForm, WebappUserCreationForm
from .models import SystemUser, WebappUsers


@admin.register(SystemUser)
class SystemUserAdmin(ChangePasswordAdminMixin, SelectAccountAdminMixin, ExtendedModelAdmin):
    list_display = (
        'username', 'account_link', 'shell', 'display_home', 'display_active', 'display_main'
    )
    list_filter = (IsActiveListFilter, 'shell', IsMainListFilter)
    fieldsets = (
        (None, {
            'fields': ('username', 'password', 'account_link', 'is_active')
        }),
        (_("System"), {
            'fields': ('shell', ('home', 'directory'), 'groups'),
        }),
    )
    add_fieldsets = (
        (None, {
            'fields': ('account_link', 'username', 'password1', 'password2')
        }),
        (_("System"), {
            'fields': ('shell', ('home', 'directory'), 'groups'),
        }),
    )
    search_fields = ('username', 'account__username')
    readonly_fields = ('account_link',)
    change_readonly_fields = ('username',)
    filter_horizontal = ('groups',)
    filter_by_account_fields = ('groups',)
    add_form = SystemUserCreationForm
    form = SystemUserChangeForm
    ordering = ('-id',)
    change_view_actions = (set_permission, create_link)
    actions = (disable, enable, list_accounts) + change_view_actions

    @admin.display(
        description=_("Main"),
        boolean=True,
    )
    def display_main(self, user):
        return user.is_main

    @admin.display(
        description=_("Home"),
        ordering='home',
    )
    def display_home(self, user):
        return user.get_home()

    def get_form(self, request, obj=None, **kwargs):
        form = super(SystemUserAdmin, self).get_form(request, obj, **kwargs)
        form.account = self.account
        if obj:
            # Has to be done here and not in the form because of strange phenomenon
            # derived from monkeypatching formfield.widget.render on AccountAdminMinxin,
            # don't ask.
            formfield = form.base_fields['groups']
            formfield.queryset = formfield.queryset.exclude(id=obj.id)
        return form

    def has_delete_permission(self, request, obj=None):
        if obj and obj.is_main:
            self.message_user(request, _(
                "You have selected one main system user (%(account)s), which can not be deleted.",
                ) % {'account': obj},
                messages.ERROR,
            )

            return False
        return super(SystemUserAdmin, self).has_delete_permission(request, obj)



@admin.register(WebappUsers)
class WebappUserAdmin(ChangePasswordAdminMixin, SelectAccountAdminMixin, ExtendedModelAdmin):
    list_display = (
        'username', 'account_link', 'home', 'target_server'
    )
    fieldsets = (
        (None, {
            'fields': ('account_link', 'username', 'password', )
        }),
        (_("System"), {
            'fields': ('shell', 'home', 'target_server'),
        }),
    )
    add_fieldsets = (
        (None, {
            'fields': ('account_link', 'username', 'password1', 'password2')
        }),
        (_("System"), {
            'fields': ('shell', 'home', 'target_server'),
        }),
    )
    search_fields = ('username', 'account__username')
    readonly_fields = ('account_link',)
    change_readonly_fields = ('username', 'home', 'target_server')
    add_form = WebappUserCreationForm
    form = WebappUserChangeForm
    ordering = ('-id',)