import ssl
import base64

from elasticsearch import AsyncElasticsearch
from elasticsearch.helpers import async_bulk

from app.core.config import GlobalConfigSettings


class AsyncElasticSearchClient:
    def __init__(self, global_config: GlobalConfigSettings):
        config = global_config.elasticsearch
        self.hosts = config.hosts

        # 优先使用 cert_content (base64 编码的证书内容)，其次使用 cert_path
        if config.cert_content:
            cert_data = base64.b64decode(config.cert_content).decode("utf-8")
            self.ctx = ssl.create_default_context(cadata=cert_data)
        elif config.cert_path:
            self.ctx = ssl.create_default_context(cafile=config.cert_path)
        else:
            self.ctx = ssl.create_default_context()

        self.es = AsyncElasticsearch(
            self.hosts,
            basic_auth=(config.username, config.password),
            ssl_context=self.ctx,
        )
        self.index_name = config.index_name

    async def create_index(self, settings, mappings):
        exists = await self.es.indices.exists(index=self.index_name)
        if exists:
            await self.es.indices.delete(index=self.index_name)

        try:
            await self.es.indices.create(
                index=self.index_name, settings=settings, mappings=mappings
            )
            print("Index created successfully")
        except Exception as e:
            print("fail to create index, reason:", e)

    async def get_max_article_id(self):
        response = await self.es.search(
            index=self.index_name,
            size=1,
            sort="article_id:desc",
            _source=["article_id"],
        )
        return response["hits"]["hits"][0]["_source"]["article_id"]

    async def search(self, search_keys, size=10):
        query = {
            "query": {"match": {"title": search_keys}},
            "_source": ["article_id", "title"],
            "size": size,
        }
        resp = await self.es.search(index=self.index_name, body=query)
        return [i["_source"] for i in resp["hits"]["hits"]]

    async def bulk_insert(self, docs):
        await async_bulk(self.es, docs)

    async def close(self):
        await self.es.close()

    async def __aenter__(self):
        return self

    async def __aexit__(self, exc_type, exc_val, exc_tb):
        await self.es.close()