package cn.iocoder.yudao.module.mes.service.wm.miscreceipt;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
import cn.iocoder.yudao.framework.common.pojo.PageResult;
import cn.iocoder.yudao.framework.common.util.object.BeanUtils;
import cn.iocoder.yudao.module.mes.controller.admin.wm.miscreceipt.vo.MesWmMiscReceiptPageReqVO;
import cn.iocoder.yudao.module.mes.controller.admin.wm.miscreceipt.vo.MesWmMiscReceiptSaveReqVO;
import cn.iocoder.yudao.module.mes.dal.dataobject.wm.miscreceipt.MesWmMiscReceiptDO;
import cn.iocoder.yudao.module.mes.dal.dataobject.wm.miscreceipt.MesWmMiscReceiptLineDO;
import cn.iocoder.yudao.module.mes.dal.mysql.wm.miscreceipt.MesWmMiscReceiptMapper;
import cn.iocoder.yudao.module.mes.enums.wm.MesWmMiscReceiptStatusEnum;
import cn.iocoder.yudao.module.mes.enums.MesBizTypeConstants;
import cn.iocoder.yudao.module.mes.enums.wm.MesWmTransactionTypeEnum;
import cn.iocoder.yudao.module.mes.service.wm.transaction.MesWmTransactionService;
import cn.iocoder.yudao.module.mes.service.wm.transaction.dto.MesWmTransactionSaveReqDTO;
import cn.iocoder.yudao.module.bpm.api.task.BpmProcessInstanceApi;
import cn.iocoder.yudao.module.bpm.api.task.dto.BpmProcessInstanceCreateReqDTO;
import cn.iocoder.yudao.module.bpm.dal.dataobject.definition.BpmProcessDefinitionInfoDO;
import cn.iocoder.yudao.module.bpm.enums.task.BpmTaskStatusEnum;
import cn.iocoder.yudao.module.bpm.service.definition.BpmProcessDefinitionService;
import jakarta.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.flowable.engine.repository.ProcessDefinition;
import org.springframework.context.annotation.Lazy;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.validation.annotation.Validated;

import java.util.*;
import java.util.List;

import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
import static cn.iocoder.yudao.framework.common.util.collection.CollectionUtils.convertList;
import static cn.iocoder.yudao.module.mes.enums.ErrorCodeConstants.*;

/**
 * MES 杂项入库单 Service 实现类
 */
@Service
@Validated
@Slf4j
public class MesWmMiscReceiptServiceImpl implements MesWmMiscReceiptService {

    @Resource
    private MesWmMiscReceiptMapper miscReceiptMapper;

    @Resource
    @Lazy
    private MesWmMiscReceiptLineService miscReceiptLineService;
    @Resource
    private MesWmTransactionService wmTransactionService;
    @Resource
    private BpmProcessInstanceApi processInstanceApi;
    @Resource
    private BpmProcessDefinitionService bpmProcessDefinitionService;

    @Override
    public Long createMiscReceipt(MesWmMiscReceiptSaveReqVO createReqVO) {
        // 校验编码唯一
        validateCodeUnique(null, createReqVO.getCode());

        // 插入
        MesWmMiscReceiptDO receipt = BeanUtils.toBean(createReqVO, MesWmMiscReceiptDO.class);
        receipt.setStatus(MesWmMiscReceiptStatusEnum.PREPARE.getStatus());
        miscReceiptMapper.insert(receipt);
        return receipt.getId();
    }

    @Override
    public void updateMiscReceipt(MesWmMiscReceiptSaveReqVO updateReqVO) {
        // 校验存在 + 草稿状态
        validateMiscReceiptExistsAndPrepare(updateReqVO.getId());
        // 校验编码唯一
        validateCodeUnique(updateReqVO.getId(), updateReqVO.getCode());

        // 更新
        MesWmMiscReceiptDO updateObj = BeanUtils.toBean(updateReqVO, MesWmMiscReceiptDO.class);
        miscReceiptMapper.updateById(updateObj);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void deleteMiscReceipt(Long id) {
        // 校验存在 + 草稿状态
        validateMiscReceiptExistsAndPrepare(id);

        // 级联删除行和明细
        miscReceiptLineService.deleteByReceiptId(id);
        // 删除主表
        miscReceiptMapper.deleteById(id);
    }

    @Override
    public MesWmMiscReceiptDO getMiscReceipt(Long id) {
        return miscReceiptMapper.selectById(id);
    }

    @Override
    public PageResult<MesWmMiscReceiptDO> getMiscReceiptPage(MesWmMiscReceiptPageReqVO pageReqVO) {
        return miscReceiptMapper.selectPage(pageReqVO);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void submitMiscReceiptApproval(Long id, String processDefinitionKey) {
        // 校验存在 + 草稿状态
        validateMiscReceiptExistsAndPrepare(id);
        // 校验至少有一条行
        List<MesWmMiscReceiptLineDO> lines = miscReceiptLineService.getMiscReceiptLineListByReceiptId(id);
        if (CollUtil.isEmpty(lines)) {
            throw exception(WM_MISC_RECEIPT_NO_LINE);
        }
        // 创建 BPM 流程实例
        String processInstanceId = processInstanceApi.createProcessInstance(getCurrentUserId(),
                new BpmProcessInstanceCreateReqDTO()
                        .setProcessDefinitionKey(processDefinitionKey)
                        .setBusinessKey(String.valueOf(id)));
        // 提交审批（草稿 → 审批中）
        miscReceiptMapper.updateById(new MesWmMiscReceiptDO()
                .setId(id)
                .setStatus(MesWmMiscReceiptStatusEnum.APPROVING.getStatus())
                .setProcessInstanceId(processInstanceId));
    }

    @Override
    public List<Map<String, Object>> getMiscReceiptApprovalProcessDefinitionList() {
        return getProcessDefinitionListByCategory(APPROVE_CATEGORY_CODE);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void updateMiscReceiptAuditStatus(Long id, Integer bpmResult) {
        // 1. 校验存在
        MesWmMiscReceiptDO receipt = validateMiscReceiptExists(id);
        if (!MesWmMiscReceiptStatusEnum.APPROVING.getStatus().equals(receipt.getStatus())) {
            log.warn("[updateMiscReceiptAuditStatus] 杂项入库单({}) 不处于审批中状态", id);
            return;
        }
        // 2. 根据审批结果更新状态
        Integer newStatus = convertBpmResultToStatus(bpmResult);
        if (newStatus != null) {
            miscReceiptMapper.updateById(new MesWmMiscReceiptDO().setId(id).setStatus(newStatus));
        }
    }

    private Integer convertBpmResultToStatus(Integer bpmResult) {
        if (BpmTaskStatusEnum.APPROVE.getStatus().equals(bpmResult)) {
            return MesWmMiscReceiptStatusEnum.APPROVED.getStatus();
        }
        if (BpmTaskStatusEnum.REJECT.getStatus().equals(bpmResult)) {
            return MesWmMiscReceiptStatusEnum.PREPARE.getStatus();
        }
        if (BpmTaskStatusEnum.CANCEL.getStatus().equals(bpmResult)) {
            return MesWmMiscReceiptStatusEnum.CANCELED.getStatus();
        }
        return null;
    }

    private List<Map<String, Object>> getProcessDefinitionListByCategory(String categoryCode) {
        List<BpmProcessDefinitionInfoDO> definitionInfoList = bpmProcessDefinitionService
                .getProcessDefinitionInfoListByCategory(categoryCode);
        if (CollUtil.isEmpty(definitionInfoList)) {
            return Collections.emptyList();
        }
        // 过滤激活状态，保留最新版本
        Map<String, ProcessDefinition> latestVersionMap = new HashMap<>();
        for (BpmProcessDefinitionInfoDO info : definitionInfoList) {
            ProcessDefinition pd = bpmProcessDefinitionService.getProcessDefinition(info.getProcessDefinitionId());
            if (pd == null || pd.isSuspended()) {
                continue;
            }
            ProcessDefinition existing = latestVersionMap.get(pd.getKey());
            if (existing == null || pd.getVersion() > existing.getVersion()) {
                latestVersionMap.put(pd.getKey(), pd);
            }
        }
        List<Map<String, Object>> result = new ArrayList<>();
        for (ProcessDefinition pd : latestVersionMap.values()) {
            Map<String, Object> item = new HashMap<>();
            item.put("id", pd.getId());
            item.put("key", pd.getKey());
            item.put("name", pd.getName());
            result.add(item);
        }
        return result;
    }

    private Long getCurrentUserId() {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication != null && authentication.getPrincipal() instanceof Long) {
            return (Long) authentication.getPrincipal();
        }
        return 1L; // 默认用户
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void finishMiscReceipt(Long id) {
        // 校验存在
        MesWmMiscReceiptDO receipt = validateMiscReceiptExists(id);
        if (ObjUtil.notEqual(MesWmMiscReceiptStatusEnum.APPROVED.getStatus(), receipt.getStatus())) {
            throw exception(WM_MISC_RECEIPT_STATUS_NOT_APPROVED);
        }

        // 2. 遍历所有行，创建库存事务（增加库存 + 记录流水）
        createTransactionList(receipt);

        // 3. 执行入库（已审批 → 已完成）
        miscReceiptMapper.updateById(new MesWmMiscReceiptDO()
                .setId(id).setStatus(MesWmMiscReceiptStatusEnum.FINISHED.getStatus()));
    }

    private void createTransactionList(MesWmMiscReceiptDO receipt) {
        List<MesWmMiscReceiptLineDO> lines = miscReceiptLineService.getMiscReceiptLineListByReceiptId(receipt.getId());
        wmTransactionService.createTransactionList(convertList(lines, line -> new MesWmTransactionSaveReqDTO()
                .setType(MesWmTransactionTypeEnum.IN.getType()).setItemId(line.getItemId())
                .setQuantity(line.getQuantity()) // 入库数量为正数
                .setWarehouseId(line.getWarehouseId()).setLocationId(line.getLocationId()).setAreaId(line.getAreaId())
                .setBizType(MesBizTypeConstants.WM_MISC_RECPT).setBizId(receipt.getId()).setBizCode(receipt.getCode()).setBizLineId(line.getId())));
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void cancelMiscReceipt(Long id) {
        // 校验存在
        MesWmMiscReceiptDO receipt = validateMiscReceiptExists(id);

        // 已完成和已取消状态不允许取消
        if (ObjUtil.equal(MesWmMiscReceiptStatusEnum.FINISHED.getStatus(), receipt.getStatus())
                || ObjUtil.equal(MesWmMiscReceiptStatusEnum.CANCELED.getStatus(), receipt.getStatus())) {
            throw exception(WM_MISC_RECEIPT_CANCEL_NOT_ALLOWED);
        }

        // 取消
        miscReceiptMapper.updateById(new MesWmMiscReceiptDO()
                .setId(id).setStatus(MesWmMiscReceiptStatusEnum.CANCELED.getStatus()));
    }

    @Override
    public MesWmMiscReceiptDO validateMiscReceiptExists(Long id) {
        MesWmMiscReceiptDO receipt = miscReceiptMapper.selectById(id);
        if (receipt == null) {
            throw exception(WM_MISC_RECEIPT_NOT_EXISTS);
        }
        return receipt;
    }

    private void validateCodeUnique(Long id, String code) {
        MesWmMiscReceiptDO receipt = miscReceiptMapper.selectByCode(code);
        if (receipt == null) {
            return;
        }
        if (id == null || ObjUtil.notEqual(id, receipt.getId())) {
            throw exception(WM_MISC_RECEIPT_CODE_DUPLICATE);
        }
    }

    private MesWmMiscReceiptDO validateMiscReceiptExistsAndPrepare(Long id) {
        MesWmMiscReceiptDO receipt = validateMiscReceiptExists(id);
        if (ObjUtil.notEqual(MesWmMiscReceiptStatusEnum.PREPARE.getStatus(), receipt.getStatus())) {
            throw exception(WM_MISC_RECEIPT_STATUS_NOT_PREPARE);
        }
        return receipt;
    }

    /**
     * 校验入库单是否可编辑（存在且为草稿状态）
     *
     * @param id 入库单ID
     */
    public void validateMiscReceiptEditable(Long id) {
        validateMiscReceiptExistsAndPrepare(id);
    }

}