package com.ruoyi.system.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.collection.CollUtil;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.system.dto.dispose.OaApprovalApplicationDisposeDTO;
import com.ruoyi.system.emums.ApprovalStatusEnum;
import com.ruoyi.system.emums.ApprovalTypeEnum;
import com.ruoyi.system.mapper.OaApprovalApplicationDisposeMapper;
import com.ruoyi.system.model.OaApprovalApplicationAssetItem;
import com.ruoyi.system.model.OaApprovalApplicationDispose;
import com.ruoyi.system.model.OaApprovalApplications;
import com.ruoyi.system.model.OaApprovalFlowNode;
import com.ruoyi.system.query.OaApprovalApplicationDisposePageQuery;
import com.ruoyi.system.service.OaApprovalApplicationAssetItemService;
import com.ruoyi.system.service.OaApprovalApplicationDisposeService;
import com.ruoyi.system.service.OaApprovalApplicationsService;
import com.ruoyi.system.service.OaApprovalFlowNodeService;
import com.ruoyi.system.service.OaApprovalTodoService;
import com.ruoyi.system.vo.dispose.OaApprovalApplicationDisposePageVO;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.List;
import java.util.stream.Collectors;

/**
 * <p>
 * 资产处置单明细表 服务实现类
 * </p>
 *
 * @author WuGuanFengYue
 * @since 2025-09-15
 */
@Service
@RequiredArgsConstructor
public class OaApprovalApplicationDisposeServiceImpl extends ServiceImpl<OaApprovalApplicationDisposeMapper, OaApprovalApplicationDispose> implements OaApprovalApplicationDisposeService {

    private final OaApprovalApplicationsService oaApprovalApplicationsService;
    private final OaApprovalFlowNodeService oaApprovalFlowNodeService;
    private final OaApprovalTodoService oaApprovalTodoService;
    private final OaApprovalApplicationAssetItemService oaApprovalApplicationAssetItemService;

    @Override
    public IPage<OaApprovalApplicationDisposePageVO> getDisposePageList(OaApprovalApplicationDisposePageQuery pageQuery) {
        Page<OaApprovalApplicationDisposePageVO> page = new Page<>(pageQuery.getPageNum(), pageQuery.getPageSize());
        return this.baseMapper.getDisposePageList(page, pageQuery);
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void submitDispose(OaApprovalApplicationDisposeDTO dto) {
        if (CollUtil.isEmpty(dto.getAssetMainIds())) {
            throw new ServiceException("资产ID列表不能为空");
        }
        
        // 1. 构建并保存审批主表
        OaApprovalApplications applications = buildOaApprovalApplications(dto);

        // 2. 获取流程首节点，设置当前节点，并保存
        OaApprovalFlowNode firstFlowNode = getFirstFlowNode(ApprovalTypeEnum.ASSET_DISPOSE.getCode());
        applications.setCurrentFlowNodeId(firstFlowNode.getId());
        oaApprovalApplicationsService.save(applications);

        // 3. 创建待办
        oaApprovalTodoService.createApprovalTodos(applications.getId(), applications.getApplicationCode(), firstFlowNode, dto.getDeptId());

        // 4. 保存处置明细
        OaApprovalApplicationDispose detail = buildOaApprovalApplicationDispose(dto, applications.getId());
        this.save(detail);

        // 5. 保存关联的资产项
        List<OaApprovalApplicationAssetItem> items = dto.getAssetMainIds().stream()
                .map(i -> {
                    OaApprovalApplicationAssetItem item = new OaApprovalApplicationAssetItem();
                    item.setApprovalApplicationId(applications.getId());
                    item.setAssetMainId(i);
                    return item;
                })
                .collect(Collectors.toList());
        oaApprovalApplicationAssetItemService.saveBatch(items);
    }

    private OaApprovalApplications buildOaApprovalApplications(OaApprovalApplicationDisposeDTO dto) {
        OaApprovalApplications applications = BeanUtil.copyProperties(dto, OaApprovalApplications.class);
        applications.setApplicationCode(generateApplicationCode("CZ"));
        applications.setApprovalId(ApprovalTypeEnum.ASSET_DISPOSE.getCode());
        applications.setApplicationDate(LocalDate.now());
        applications.setApprovalStatus(ApprovalStatusEnum.PENDING.getCode());
        return applications;
    }

    private OaApprovalApplicationDispose buildOaApprovalApplicationDispose(OaApprovalApplicationDisposeDTO dto, Integer applicationId) {
        OaApprovalApplicationDispose dispose = BeanUtil.copyProperties(dto, OaApprovalApplicationDispose.class);
        dispose.setApprovalApplicationId(applicationId);
        return dispose;
    }

    private OaApprovalFlowNode getFirstFlowNode(Integer approvalId) {
        List<OaApprovalFlowNode> flowNodes = oaApprovalFlowNodeService.lambdaQuery()
                .eq(OaApprovalFlowNode::getApprovalId, approvalId)
                .eq(OaApprovalFlowNode::getStatus, 1)
                .orderByAsc(OaApprovalFlowNode::getSortOrder)
                .list();
        if (CollectionUtils.isEmpty(flowNodes)) {
            throw new ServiceException("未找到有效的审批流程配置");
        }
        return flowNodes.get(0);
    }

    /**
     * 生成申请单号：CZ + yyyyMMdd + 3位序号
     */
    private String generateApplicationCode(String prefix) {
        String dateStr = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd"));
        prefix = prefix + dateStr;
        Long count = oaApprovalApplicationsService.lambdaQuery()
                .like(OaApprovalApplications::getApplicationCode, prefix)
                .count();
        return prefix + String.format("%03d", count + 1);
    }

    @Override
    public void deleteByApplicationId(Integer applicationId) {
        this.lambdaUpdate().eq(OaApprovalApplicationDispose::getApprovalApplicationId, applicationId).remove();
        oaApprovalApplicationAssetItemService.lambdaUpdate().eq(OaApprovalApplicationAssetItem::getApprovalApplicationId, applicationId).remove();
        oaApprovalApplicationsService.removeById(applicationId);
    }
}