package com.vincent.rsf.server.manager.schedules;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.vincent.rsf.framework.exception.CoolException;
import com.vincent.rsf.server.manager.entity.AsnOrderItemLog;
import com.vincent.rsf.server.manager.entity.AsnOrderLog;
import com.vincent.rsf.server.manager.entity.Matnr;
import com.vincent.rsf.server.manager.service.AsnOrderItemLogService;
import com.vincent.rsf.server.manager.service.AsnOrderLogService;
import com.vincent.rsf.server.manager.service.MatnrService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;

import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicBoolean;

/**
 * ASN 单据压测数据定时生成器。
 */
@Slf4j
@Component
public class AsnOrderPressureSchedules {

    private static final DateTimeFormatter ORDER_CODE_FORMATTER = DateTimeFormatter.ofPattern("yyyyMMddHHmmss");
    private static final String ORDER_TYPE = "in";
    private static final String ORDER_WORK_TYPE = "71";
    private static final Integer TENANT_ID = 1;
    private static final Long USER_ID = 51L;
    private static final String MEMO = "ASN_PRESSURE_TEST";
    private final AtomicBoolean running = new AtomicBoolean(false);

    @Autowired
    private AsnOrderLogService asnOrderLogService;
    @Autowired
    private AsnOrderItemLogService asnOrderItemLogService;
    @Autowired
    private MatnrService matnrService;

    @Value("${pressure.asn-order.enabled:false}")
    private boolean enabled;

    @Value("${pressure.asn-order.order-count-per-run:20}")
    private int orderCountPerRun;

    @Value("${pressure.asn-order.item-count-per-order:5}")
    private int itemCountPerOrder;

    @Value("${pressure.asn-order.item-qty:10}")
    private double itemQty;

    @Scheduled(cron = "${pressure.asn-order.cron:0/10 * * * * ?}")
    @Transactional(rollbackFor = Exception.class)
    public void insertPressureOrders() {
        if (!enabled) {
            return;
        }
        if (!running.compareAndSet(false, true)) {
            log.warn("ASN压测任务仍在执行中，本轮跳过");
            return;
        }
        try {
            if (orderCountPerRun <= 0 || itemCountPerOrder <= 0 || itemQty <= 0) {
                log.warn("ASN压测任务配置无效，跳过执行: orderCountPerRun={}, itemCountPerOrder={}, itemQty={}",
                        orderCountPerRun, itemCountPerOrder, itemQty);
                return;
            }

            List<Matnr> matnrs = loadMatnrs();
            if (matnrs.isEmpty()) {
                log.warn("ASN压测任务未获取到可用物料，跳过执行");
                return;
            }
            Collections.shuffle(matnrs);

            Date now = new Date();
            LocalDateTime nowTime = LocalDateTime.now();
            double totalQty = itemCountPerOrder * itemQty;

            List<AsnOrderLog> orders = new ArrayList<>(orderCountPerRun);
            for (int i = 0; i < orderCountPerRun; i++) {
                orders.add(buildOrder(now, nowTime, totalQty, i));
            }
            if (!asnOrderLogService.saveBatch(orders, 200)) {
                throw new CoolException("ASN压测主单插入失败");
            }

            List<AsnOrderLog> persistedOrders = asnOrderLogService.list(new LambdaQueryWrapper<AsnOrderLog>()
                    .in(AsnOrderLog::getCode, extractOrderCodes(orders)));
            Map<String, AsnOrderLog> orderMap = new HashMap<>(persistedOrders.size());
            for (AsnOrderLog order : persistedOrders) {
                orderMap.put(order.getCode(), order);
            }

            List<AsnOrderItemLog> items = new ArrayList<>(orderCountPerRun * itemCountPerOrder);
            for (int orderIndex = 0; orderIndex < orders.size(); orderIndex++) {
                AsnOrderLog order = orderMap.get(orders.get(orderIndex).getCode());
                if (order == null) {
                    throw new CoolException("ASN压测主单回查失败");
                }
                for (int itemIndex = 0; itemIndex < itemCountPerOrder; itemIndex++) {
                    Matnr matnr = matnrs.get((orderIndex * itemCountPerOrder + itemIndex) % matnrs.size());
                    items.add(buildOrderItem(order, matnr, now, orderIndex, itemIndex));
                }
            }
            if (!asnOrderItemLogService.saveBatch(items, 500)) {
                throw new CoolException("ASN压测明细插入失败");
            }

            log.info("ASN压测任务执行完成，本次插入主单 {} 条，明细 {} 条", orders.size(), items.size());
        } finally {
            running.set(false);
        }
    }

    private List<Matnr> loadMatnrs() {
        int needCount = Math.min(Math.max(orderCountPerRun * itemCountPerOrder, 200), 2000);
        return matnrService.list(new LambdaQueryWrapper<Matnr>()
                .eq(Matnr::getDeleted, 0)
                .eq(Matnr::getStatus, 1)
                .select(Matnr::getId, Matnr::getCode, Matnr::getName, Matnr::getFieldsIndex,
                        Matnr::getSpec, Matnr::getModel, Matnr::getUnit, Matnr::getPurUnit,
                        Matnr::getStockUnit, Matnr::getBaseUnit, Matnr::getUseOrgId,
                        Matnr::getUseOrgName, Matnr::getErpClsId)
                .orderByDesc(Matnr::getId)
                .last("limit " + needCount));
    }

    private List<String> extractOrderCodes(List<AsnOrderLog> orders) {
        List<String> codes = new ArrayList<>(orders.size());
        for (AsnOrderLog order : orders) {
            codes.add(order.getCode());
        }
        return codes;
    }

    private AsnOrderLog buildOrder(Date now, LocalDateTime nowTime, double totalQty, int sequence) {
        String suffix = String.format("%04d", sequence + 1);
        String code = "erp" + nowTime.format(ORDER_CODE_FORMATTER) + suffix;
        long serialNo = System.currentTimeMillis() * 1000 + sequence;

        AsnOrderLog order = new AsnOrderLog();
        order.setCode(code);
        order.setPoCode(code);
        order.setPoId(serialNo);
        order.setType(ORDER_TYPE);
        order.setWkType(ORDER_WORK_TYPE);
        order.setAnfme(totalQty);
        order.setQty(totalQty);
        order.setRleStatus((short) 0);
        order.setNtyStatus((short) 0);
        order.setExceStatus((short) 4);
        order.setStatus(1);
        order.setDeleted(0);
        order.setTenantId(TENANT_ID);
        order.setCreateBy(USER_ID);
        order.setCreateTime(now);
        order.setUpdateBy(USER_ID);
        order.setUpdateTime(now);
        order.setMemo(MEMO);
        return order;
    }

    private AsnOrderItemLog buildOrderItem(AsnOrderLog order, Matnr matnr, Date now, int orderIndex, int itemIndex) {
        String stockUnit = StringUtils.firstNonBlank(matnr.getStockUnit(), matnr.getPurUnit(), matnr.getUnit(), matnr.getBaseUnit());
        String purUnit = StringUtils.firstNonBlank(matnr.getPurUnit(), matnr.getUnit(), matnr.getStockUnit(), matnr.getBaseUnit());
        String batchCode = "B" + new SimpleDateFormat("yyyyMMddHHmmss").format(now)
                + String.format("%02d%02d", orderIndex + 1, itemIndex + 1);
        String trackCode = "T" + System.currentTimeMillis() + String.format("%02d%02d", orderIndex + 1, itemIndex + 1);

        return new AsnOrderItemLog()
                .setLogId(order.getId())
                .setAsnId(order.getAsnId())
                .setAsnCode(order.getCode())
                .setPlatItemId("M" + (itemIndex + 1))
                .setPoCode(order.getPoCode())
                .setFieldsIndex(matnr.getFieldsIndex())
                .setMatnrId(matnr.getId())
                .setMatnrCode(matnr.getCode())
                .setMaktx(matnr.getName())
                .setAnfme(itemQty)
                .setPurQty(itemQty)
                .setQty(itemQty)
                .setStockUnit(stockUnit)
                .setPurUnit(purUnit)
                .setSplrBatch(batchCode)
                .setSplrCode("gongys1")
                .setSplrName("供应商1")
                .setTrackCode(trackCode)
                .setBarcode(trackCode)
                .setNtyStatus((short) 0)
                .setStatus(1)
                .setDeleted(0)
                .setTenantId(TENANT_ID)
                .setCreateBy(USER_ID)
                .setCreateTime(now)
                .setUpdateBy(USER_ID)
                .setUpdateTime(now)
                .setMemo(MEMO);
    }
}