# -*- coding: utf-8 -*-
"""库存变更任务"""

import json

from .base_task import BaseTask, TaskContext
from loaders.facts.inventory_change import InventoryChangeLoader
from models.parsers import TypeParser


class InventoryChangeTask(BaseTask):
    """同步库存变化记录"""

    def get_task_code(self) -> str:
        return "INVENTORY_CHANGE"

    def extract(self, context: TaskContext) -> dict:
        params = self._merge_common_params(
            {
                "siteId": context.store_id,
                "startTime": TypeParser.format_timestamp(context.window_start, self.tz),
                "endTime": TypeParser.format_timestamp(context.window_end, self.tz),
            }
        )
        records, _ = self.api.get_paginated(
            endpoint="/GoodsStockManage/QueryGoodsOutboundReceipt",
            params=params,
            page_size=self.config.get("api.page_size", 200),
            data_path=("data",),
            list_key="queryDeliveryRecordsList",
        )
        return {"records": records}

    def transform(self, extracted: dict, context: TaskContext) -> dict:
        parsed, skipped = [], 0
        for raw in extracted.get("records", []):
            mapped = self._parse_change(raw, context.store_id)
            if mapped:
                parsed.append(mapped)
            else:
                skipped += 1
        return {
            "records": parsed,
            "fetched": len(extracted.get("records", [])),
            "skipped": skipped,
        }

    def load(self, transformed: dict, context: TaskContext) -> dict:
        loader = InventoryChangeLoader(self.db)
        inserted, updated, loader_skipped = loader.upsert_changes(transformed["records"])
        return {
            "fetched": transformed["fetched"],
            "inserted": inserted,
            "updated": updated,
            "skipped": transformed["skipped"] + loader_skipped,
            "errors": 0,
        }

    def _parse_change(self, raw: dict, store_id: int) -> dict | None:
        change_id = TypeParser.parse_int(
            raw.get("siteGoodsStockId") or raw.get("site_goods_stock_id")
        )
        if not change_id:
            self.logger.warning("跳过缺少库存变动ID的记录: %s", raw)
            return None

        return {
            "store_id": store_id,
            "change_id": change_id,
            "site_goods_id": TypeParser.parse_int(
                raw.get("siteGoodsId") or raw.get("site_goods_id")
            ),
            "stock_type": raw.get("stockType") or raw.get("stock_type"),
            "goods_name": raw.get("goodsName"),
            "change_time": TypeParser.parse_timestamp(
                raw.get("createTime") or raw.get("create_time"), self.tz
            ),
            "start_qty": TypeParser.parse_int(raw.get("startNum")),
            "end_qty": TypeParser.parse_int(raw.get("endNum")),
            "change_qty": TypeParser.parse_int(raw.get("changeNum")),
            "unit": raw.get("unit"),
            "price": TypeParser.parse_decimal(raw.get("price")),
            "operator_name": raw.get("operatorName"),
            "remark": raw.get("remark"),
            "goods_category_id": TypeParser.parse_int(raw.get("goodsCategoryId")),
            "goods_second_category_id": TypeParser.parse_int(
                raw.get("goodsSecondCategoryId")
            ),
            "raw_data": json.dumps(raw, ensure_ascii=False),
        }