import json
from typing import Dict, Any, List, Optional

from clickhouse_connect.driver import AsyncClient

from app.log import logger
from app.services.ingest.registry import get_config, list_configs, PlatformConfig
from app.services.ingest.company_enrichment import enrich_company_desc
from app.services.ingest.dedup import build_insert_row, batch_dedup_filter
from app.services.ingest.remote_push import batch_push_to_remote


class IngestService:
    """统一数据入库服务"""

    def __init__(self, clickhouse_client: AsyncClient):
        self.client = clickhouse_client

    async def store_batch(
        self,
        platform: str,
        channel: str,
        data_type: str,
        data_list: List[Dict[str, Any]],
        check_duplicate: bool = True,
    ) -> Dict[str, Any]:
        results: Dict[str, Any] = {
            "total": len(data_list), "success": 0, "failed": 0, "duplicate": 0, "errors": [],
        }
        if not data_list:
            return results

        config = get_config(platform, channel, data_type)
        table = f"job_data.{config.table}"

        # 准备所有行
        all_columns: Optional[List[str]] = None
        all_values: List[List[Any]] = []
        push_data_list: List[Dict[str, Any]] = []

        for i, data in enumerate(data_list):
            try:
                columns, values = build_insert_row(config, data, channel)
                all_columns = all_columns or columns
                all_values.append(values)

                if config.push_mapper and data_type == "job":
                    push_item = config.push_mapper(data)
                    if push_item:
                        push_data_list.append(push_item)
            except Exception as e:
                results["failed"] += 1
                results["errors"].append({"index": i, "error": str(e)})

        if not all_values or all_columns is None:
            return results

        # 批量去重
        if check_duplicate:
            try:
                filtered, ignored = await batch_dedup_filter(
                    self.client, config, data_list, all_columns, all_values,
                )
                all_values = filtered
                results["duplicate"] = ignored
            except Exception as e:
                logger.error(f"批量去重失败: {e}")

        # 批量插入
        if all_values:
            try:
                await self.client.insert(table, all_values, column_names=all_columns)
                results["success"] = len(all_values)
            except Exception as e:
                logger.error(f"批量插入失败: {e}")
                results["failed"] += len(all_values)
                results["errors"].append({"error": f"批量插入失败: {e}"})

        # 异步远程推送（不影响主结果）
        if push_data_list:
            # 补全 company_desc（优先 MySQL，fallback 平台 API）
            try:
                await enrich_company_desc(platform, push_data_list)
            except Exception as e:
                logger.warning(f"company_desc 补全异常: {e}")

            try:
                await batch_push_to_remote(push_data_list)
            except Exception as e:
                logger.warning(f"批量推送失败: {e}")

        return results

    async def store_single(
        self,
        platform: str,
        channel: str,
        data_type: str,
        data: Dict[str, Any],
        check_duplicate: bool = True,
    ) -> Dict[str, Any]:
        return await self.store_batch(platform, channel, data_type, [data], check_duplicate)

    async def query_data(
        self,
        platform: str,
        channel: str,
        data_type: str,
        limit: int = 100,
        offset: int = 0,
    ) -> Dict[str, Any]:
        config = get_config(platform, channel, data_type)
        table = f"job_data.{config.table}"

        try:
            count_result = await self.client.query(f"SELECT count() FROM {table}")
            total = count_result.result_rows[0][0] if count_result.result_rows else 0

            query = f"SELECT * FROM {table} ORDER BY created_at DESC LIMIT {limit} OFFSET {offset}"
            result = await self.client.query(query)

            data_rows = []
            for row in result.result_rows:
                item = dict(zip(result.column_names, row))
                if "json_data" in item and isinstance(item["json_data"], str):
                    try:
                        parsed = json.loads(item["json_data"])
                        if isinstance(parsed, dict):
                            item.update(parsed)
                    except Exception:
                        pass
                data_rows.append(item)

            return {"success": True, "data": data_rows, "count": total, "table_name": config.table}
        except Exception as e:
            logger.error(f"查询失败: {e}")
            return {"success": False, "message": str(e), "error": str(e)}

    @staticmethod
    def get_registry_info() -> Dict[str, Any]:
        configs = list_configs()
        platforms = sorted({c.platform for c in configs})
        channels = sorted({c.channel for c in configs})
        data_types = sorted({c.data_type for c in configs})
        entries = [
            {
                "platform": c.platform,
                "channel": c.channel,
                "data_type": c.data_type,
                "table": c.table,
                "dedup_columns": c.dedup_columns,
            }
            for c in configs
        ]
        return {
            "platforms": platforms,
            "channels": channels,
            "data_types": data_types,
            "entries": entries,
        }