# Copyright: (c) OpenSpug Organization. https://github.com/openspug/spug
# Copyright: (c) <spug.dev@gmail.com>
# Released under the AGPL-3.0 License.
from django.views.generic import View
from django_redis import get_redis_connection
from django.conf import settings
from libs import json_response, JsonParser, Argument, human_datetime, auth
from apps.exec.models import ExecTemplate, ExecHistory
from apps.host.models import Host
from apps.account.utils import has_host_perm
import hashlib
import uuid
import json


class TemplateView(View):
    @auth('exec.template.view')
    def get(self, request):
        templates = ExecTemplate.objects.all()
        types = [x['type'] for x in templates.order_by('type').values('type').distinct()]
        return json_response({'types': types, 'templates': [x.to_dict() for x in templates]})

    @auth('exec.template.add|exec.template.edit')
    def post(self, request):
        form, error = JsonParser(
            Argument('id', type=int, required=False),
            Argument('name', help='请输入模版名称'),
            Argument('type', help='请选择模版类型'),
            Argument('body', help='请输入模版内容'),
            Argument('interpreter', default='sh'),
            Argument('desc', required=False)
        ).parse(request.body)
        if error is None:
            if form.id:
                form.updated_at = human_datetime()
                form.updated_by = request.user
                ExecTemplate.objects.filter(pk=form.pop('id')).update(**form)
            else:
                form.created_by = request.user
                ExecTemplate.objects.create(**form)
        return json_response(error=error)

    @auth('exec.template.del')
    def delete(self, request):
        form, error = JsonParser(
            Argument('id', type=int, help='请指定操作对象')
        ).parse(request.GET)
        if error is None:
            ExecTemplate.objects.filter(pk=form.id).delete()
        return json_response(error=error)


@auth('exec.task.do')
def do_task(request):
    form, error = JsonParser(
        Argument('host_ids', type=list, filter=lambda x: len(x), help='请选择执行主机'),
        Argument('command', help='请输入执行命令内容'),
        Argument('interpreter', default='sh')
    ).parse(request.body)
    if error is None:
        if not has_host_perm(request.user, form.host_ids):
            return json_response(error='无权访问主机，请联系管理员')
        token, rds = uuid.uuid4().hex, get_redis_connection()
        for host in Host.objects.filter(id__in=form.host_ids):
            data = dict(
                key=host.id,
                name=host.name,
                token=token,
                interpreter=form.interpreter,
                hostname=host.hostname,
                port=host.port,
                username=host.username,
                command=form.command,
                pkey=host.private_key,
            )
            rds.rpush(settings.EXEC_WORKER_KEY, json.dumps(data))
        form.host_ids.sort()
        host_ids = json.dumps(form.host_ids)
        tmp_str = f'{form.interpreter},{host_ids},{form.command}'
        digest = hashlib.md5(tmp_str.encode()).hexdigest()
        record = ExecHistory.objects.filter(user=request.user, digest=digest).first()
        if record:
            record.updated_at = human_datetime()
            record.save()
        else:
            ExecHistory.objects.create(
                user=request.user,
                digest=digest,
                interpreter=form.interpreter,
                command=form.command,
                host_ids=json.dumps(form.host_ids),
            )
        return json_response(token)
    return json_response(error=error)


@auth('exec.task.do')
def get_histories(request):
    records = ExecHistory.objects.filter(user=request.user)
    return json_response([x.to_view() for x in records])