# 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.db.models import F
from libs import json_response, JsonParser, Argument
from apps.app.models import Deploy
from apps.config.models import *
import json


class EnvironmentView(View):
    def get(self, request):
        query = {}
        if not request.user.is_supper:
            query['id__in'] = request.user.deploy_perms['envs']
        envs = Environment.objects.filter(**query)
        return json_response(envs)

    def post(self, request):
        form, error = JsonParser(
            Argument('id', type=int, required=False),
            Argument('name', help='请输入环境名称'),
            Argument('key', help='请输入唯一标识符'),
            Argument('desc', required=False)
        ).parse(request.body)
        if error is None:
            form.key = form.key.replace("'", '')
            env = Environment.objects.filter(key=form.key).first()
            if env and env.id != form.id:
                return json_response(error=f'唯一标识符 {form.key} 已存在，请更改后重试')
            if form.id:
                Environment.objects.filter(pk=form.id).update(**form)
            else:
                env = Environment.objects.create(created_by=request.user, **form)
                if request.user.role:
                    request.user.role.add_deploy_perm('envs', env.id)
        return json_response(error=error)

    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:
            if Config.objects.filter(env_id=form.id).exists():
                return json_response(error='该环境已存在关联的配置信息，请删除相关配置后再尝试删除')
            if Deploy.objects.filter(env_id=form.id).exists():
                return json_response(error='该环境已关联了发布配置，请删除相关发布配置后再尝试删除')
            Environment.objects.filter(pk=form.id).delete()
        return json_response(error=error)


class ServiceView(View):
    def get(self, request):
        services = Service.objects.all()
        return json_response(services)

    def post(self, request):
        form, error = JsonParser(
            Argument('id', type=int, required=False),
            Argument('name', help='请输入服务名称'),
            Argument('key', help='请输入唯一标识符'),
            Argument('desc', required=False)
        ).parse(request.body)
        if error is None:
            service = Service.objects.filter(key=form.key).first()
            if service and service.id != form.id:
                return json_response(error=f'唯一标识符 {form.key} 已存在，请更改后重试')
            if form.id:
                Service.objects.filter(pk=form.id).update(**form)
            else:
                Service.objects.create(created_by=request.user, **form)
        return json_response(error=error)

    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:
            if Config.objects.filter(type='src', o_id=form.id).exists():
                return json_response(error='该服务已存在关联的配置信息，请删除相关配置后再尝试删除')
            Service.objects.filter(pk=form.id).delete()
        return json_response(error=error)


class ConfigView(View):
    def get(self, request):
        form, error = JsonParser(
            Argument('id', type=int, help='未指定操作对象'),
            Argument('type', filter=lambda x: x in dict(Config.TYPES), help='缺少必要参数'),
            Argument('env_id', type=int, help='缺少必要参数'),
        ).parse(request.GET)
        if error is None:
            form.o_id, data = form.pop('id'), []
            for item in Config.objects.filter(**form).annotate(update_user=F('updated_by__nickname')):
                tmp = item.to_dict()
                tmp['update_user'] = item.update_user
                data.append(tmp)
            return json_response(data)
        return json_response(error=error)

    def post(self, request):
        form, error = JsonParser(
            Argument('o_id', type=int, help='缺少必要参数'),
            Argument('type', filter=lambda x: x in dict(Config.TYPES), help='缺少必要参数'),
            Argument('envs', type=list, filter=lambda x: len(x), help='请选择环境'),
            Argument('key', help='请输入Key'),
            Argument('is_public', type=bool, help='缺少必要参数'),
            Argument('value', type=str, default=''),
            Argument('desc', required=False)
        ).parse(request.body)
        if error is None:
            form.value = form.value.strip()
            form.updated_at = human_datetime()
            form.updated_by = request.user
            envs = form.pop('envs')
            for env_id in envs:
                Config.objects.create(env_id=env_id, **form)
                ConfigHistory.objects.create(action='1', env_id=env_id, **form)
        return json_response(error=error)

    def patch(self, request):
        form, error = JsonParser(
            Argument('id', type=int, help='缺少必要参数'),
            Argument('value', type=str, default=''),
            Argument('is_public', type=bool, help='缺少必要参数'),
            Argument('desc', required=False)
        ).parse(request.body)
        if error is None:
            form.value = form.value.strip()
            config = Config.objects.filter(pk=form.id).first()
            if not config:
                return json_response(error='未找到指定对象')
            config.desc = form.desc
            config.is_public = form.is_public
            if config.value != form.value:
                old_value = config.value
                config.value = form.value
                config.updated_at = human_datetime()
                config.updated_by = request.user
                ConfigHistory.objects.create(
                    action='2',
                    old_value=old_value,
                    **config.to_dict(excludes=('id',)))
            config.save()
        return json_response(error=error)

    def delete(self, request):
        form, error = JsonParser(
            Argument('id', type=int, help='未指定操作对象')
        ).parse(request.GET)
        if error is None:
            config = Config.objects.filter(pk=form.id).first()
            if config:
                ConfigHistory.objects.create(
                    action='3',
                    old_value=config.value,
                    value='',
                    updated_at=human_datetime(),
                    updated_by=request.user,
                    **config.to_dict(excludes=('id', 'value', 'updated_at', 'updated_by_id'))
                )
                config.delete()
        return json_response(error=error)


class HistoryView(View):
    def post(self, request):
        form, error = JsonParser(
            Argument('o_id', type=int, help='缺少必要参数'),
            Argument('env_id', type=int, help='缺少必要参数'),
            Argument('type', filter=lambda x: x in dict(Config.TYPES), help='缺少必要参数')
        ).parse(request.body)
        if error is None:
            data = []
            for item in ConfigHistory.objects.filter(**form).annotate(update_user=F('updated_by__nickname')):
                tmp = item.to_dict()
                tmp['action_alias'] = item.get_action_display()
                tmp['update_user'] = item.update_user
                data.append(tmp)
            return json_response(data)
        return json_response(error=error)


def post_diff(request):
    form, error = JsonParser(
        Argument('o_id', type=int, help='缺少必要参数'),
        Argument('type', filter=lambda x: x in dict(Config.TYPES), help='缺少必要参数'),
        Argument('envs', type=list, filter=lambda x: len(x), help='缺少必要参数'),
    ).parse(request.body)
    if error is None:
        data, form.env_id__in = {}, form.pop('envs')
        for item in Config.objects.filter(**form).order_by('key'):
            if item.key in data:
                data[item.key][item.env_id] = item.value
            else:
                data[item.key] = {'key': item.key, item.env_id: item.value}
        return json_response(list(data.values()))
    return json_response(error=error)


def parse_json(request):
    form, error = JsonParser(
        Argument('o_id', type=int, help='缺少必要参数'),
        Argument('type', filter=lambda x: x in dict(Config.TYPES), help='缺少必要参数'),
        Argument('env_id', type=int, help='缺少必要参数'),
        Argument('data', type=dict, help='缺少必要参数')
    ).parse(request.body)
    if error is None:
        data = form.pop('data')
        _parse(request, form, data)
    return json_response(error=error)


def parse_text(request):
    form, error = JsonParser(
        Argument('o_id', type=int, help='缺少必要参数'),
        Argument('type', filter=lambda x: x in dict(Config.TYPES), help='缺少必要参数'),
        Argument('env_id', type=int, help='缺少必要参数'),
        Argument('data', handler=str.strip, help='缺少必要参数')
    ).parse(request.body)
    if error is None:
        data = {}
        for line in form.pop('data').split('\n'):
            line = line.strip()
            if not line or line[0] in ('#', ';'):
                continue
            fields = line.split('=', 1)
            if len(fields) != 2 or fields[0].strip() == '':
                return json_response(error=f'解析配置{line!r}失败，确认其遵循 key = value 格式')
            data[fields[0].strip()] = fields[1].strip()
        _parse(request, form, data)
    return json_response(error=error)


def _parse(request, query, data):
    for item in Config.objects.filter(**query):
        if item.key in data:
            value = _filter_value(data.pop(item.key))
            if item.value != value:
                old_value = item.value
                item.value = value
                item.updated_at = human_datetime()
                item.updated_by = request.user
                item.save()
                ConfigHistory.objects.create(
                    action='2',
                    old_value=old_value,
                    **item.to_dict(excludes=('id',)))
        else:
            ConfigHistory.objects.create(
                action='3',
                old_value=item.value,
                value='',
                updated_at=human_datetime(),
                updated_by=request.user,
                **item.to_dict(excludes=('id', 'value', 'updated_at', 'updated_by_id'))
            )
            item.delete()
    for key, value in data.items():
        query.key = key
        query.is_public = False
        query.value = _filter_value(value)
        query.updated_at = human_datetime()
        query.updated_by = request.user
        Config.objects.create(**query)
        ConfigHistory.objects.create(action='1', **query)


def _filter_value(value):
    if isinstance(value, (str, int)):
        value = str(value).strip()
    else:
        value = json.dumps(value)
    return value