from typing import List, Dict

from applications.utils.mysql import ContentChunks, Contents, Dataset
from applications.utils.async_utils import run_tasks_with_asyncio_task_group
from applications.utils.milvus import async_delete_chunk


class DeleteTask:
    def __init__(self, resource):
        self.mysql_client = resource.mysql_client
        self.milvus_client = resource.milvus_client
        self.es_client = resource.es_client
        self.content_manager = None
        self.chunk_manager = None
        self.dataset_manager = None

    async def search_id_from_es(self, filters: Dict) -> List:
        must_clauses = []
        for field, value in filters.items():
            must_clauses.append({"term": {field: value}})
        query = {
            "query": {"bool": {"must": must_clauses}},
            "_source": False,
        }
        try:
            resp = await self.es_client.async_search(query=query)
            return [int(hit["_id"]) for hit in resp["hits"]["hits"]]
        except Exception as e:
            print(f"search failed: {e}")
            return []

    async def delete_ids_from_es(self, ids: List):
        return await run_tasks_with_asyncio_task_group(
            task_list=ids,
            handler=self.es_client.async_delete,
            description="delete IDs From ElasticSearch",
            unit="chunk",
            max_concurrency=10,
        )

    async def delete_by_query(self, filters: Dict):
        must_clauses = []
        for field, value in filters.items():
            must_clauses.append({"term": {field: value}})
        query = {"query": {"bool": {"must": must_clauses}}}
        await self.es_client.async_delete_by_query(query=query)

    async def delete_ids_from_milvus(self, ids: List):
        return await async_delete_chunk(self.milvus_client, ids)

    async def delete_by_filters(self, filters: Dict):
        # step2, 查出 es 中的 id，并且删除
        ids = await self.search_id_from_es(filters)
        if not ids:
            return

        # step3, delete from milvus
        await self.delete_ids_from_milvus(ids)

        # step4, delete from es by query
        await self.delete_by_query(filters)

    async def delete_chunk(self, params):
        doc_id = params["doc_id"]
        chunk_id = params["chunk_id"]
        try:
            self.chunk_manager = ContentChunks(self.mysql_client)
            await self.chunk_manager.update_doc_chunk_status(doc_id, chunk_id, 1, 0)
            await self.delete_by_filters({"doc_id": doc_id, "chunk_id": chunk_id})
            return {"doc_id": doc_id, "chunk_id": chunk_id, "status": "success"}
        except Exception as e:
            print(f"delete chunk failed: {e}")
            return {"doc_id": doc_id, "chunk_id": chunk_id, "status": "failed"}

    async def delete_doc(self, params):
        doc_id = params["doc_id"]
        try:
            self.chunk_manager = ContentChunks(self.mysql_client)
            self.content_manager = Contents(self.mysql_client)
            await self.chunk_manager.update_doc_status(doc_id, 1, 0)
            await self.content_manager.update_doc_status(doc_id, 1, 0)

            await self.delete_by_filters({"doc_id": doc_id})
            return {"doc_id": doc_id, "status": "success"}
        except Exception as e:
            print(f"delete chunk failed: {e}")
            return {"doc_id": doc_id, "status": "failed"}

    async def delete_dataset(self, params):
        dataset_id = params["dataset_id"]
        try:
            self.chunk_manager = ContentChunks(self.mysql_client)
            self.content_manager = Contents(self.mysql_client)
            self.dataset_manager = Dataset(self.mysql_client)
            await self.chunk_manager.update_dataset_status(dataset_id, 1, 0)
            await self.content_manager.update_dataset_status(dataset_id, 1, 0)
            await self.dataset_manager.update_dataset_status(dataset_id, 1, 0)

            await self.delete_by_filters({"dataset_id": dataset_id})
            return {"dataset_id": dataset_id, "status": "success"}
        except Exception as e:
            print(f"delete dataset failed: {e}")
            return {"dataset_id": dataset_id, "status": "failed"}

    async def deal(self, level, params):
        """
        :param level: 删除级别
        :param params: 删除 id 信息
        :return:
        """
        match level:
            case "dataset":
                return await self.delete_dataset(params)
            case "doc":
                return await self.delete_doc(params)
            case "chunk":
                return await self.delete_chunk(params)
            case _:
                return {"error": "error level"}