import logging

from django.contrib import admin
from django.db.models import Q

from lib.decorators import readonly
from lib.proxmox import Proxmox
from proxmox.models import Lxc, LxcTemplate


@readonly
def sync_all_lxc_templates_from_proxmox(*args, **kwargs):
    pm = Proxmox()
    for storage in pm.storage_get(enabled=1):
        logging.debug(f'Syncing Templates from storage {storage["storage"]}')
        storage_name = storage['storage']
        for tmpl in pm.storage(f'{storage_name}/content').get(content='vztmpl'):
            try:
                logging.debug(f'Updating {tmpl["volid"]}')
                template = LxcTemplate.objects.get(volid=tmpl['volid'])
            except LxcTemplate.DoesNotExist:
                logging.debug(f'Fail - Creating {tmpl["volid"]}')
                template = LxcTemplate.objects.create(volid=tmpl['volid'])

            template.write(**tmpl)


@readonly
def sync_all_lxc_from_proxmox(*args, **kwargs):
    from lib.proxmox import Proxmox
    pm = Proxmox()
    existing_vms = []
    for lxc_data in pm.get_all_lxc(as_dict=True, **kwargs):
        vmid = lxc_data.pop('vmid')
        try:
            lx: Lxc = Lxc.objects.get(vmid=vmid)
            logging.info(f'Updating {vmid}')
        except Lxc.DoesNotExist:
            logging.info(f'Creating {vmid}')
            lx = Lxc.objects.create(**{'vmid': vmid})

        lx.from_proxmox(**lxc_data)

        existing_vms.append(vmid)

    to_delete = Lxc.objects.filter(~Q(vmid__in=existing_vms))
    if to_delete:
        logging.info(f'Deleting {[d.vmid for d in to_delete]}')
        to_delete.delete()


sync_all_lxc_from_proxmox.short_description = 'Sync all LXC from Proxmox'


@admin.register(Lxc)
class LxcAdmin(admin.ModelAdmin):
    actions = [sync_all_lxc_from_proxmox, 'sync_selected_from_proxmox']
    search_fields = ('name', 'vmid', 'hostname', 'hwaddr')
    list_display = ('name', 'vmid', 'hwaddr', 'disksize', 'memory', 'cpus', 'status')
    list_filter = ('status', 'disksize',)

    def get_readonly_fields(self, request, obj=None):
        if obj:
            return [k.name for k in obj._meta.fields if
                    k.name not in ['name', 'cores', 'hwaddr', 'size', 'cpus', 'memory', 'description', 'hostname']]
        return self.readonly_fields

    @admin.action(description='Sync selected from proxmox')
    @readonly
    def sync_selected_from_proxmox(self, request, queryset):
        for lx in queryset:
            lx.sync_from_proxmox()


@admin.register(LxcTemplate)
class LxcTemplateAdmin(admin.ModelAdmin):
    actions = [sync_all_lxc_templates_from_proxmox]
    search_fields = ('volid',)
    list_display = ('volid', 'human_size', 'content', 'is_default_template')
    list_filter = ('is_default_template',)