package com.ruoyi.system.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.system.dto.asset.OaApprovalApplicationAssetReceiveDTO;
import com.ruoyi.system.emums.ApprovalStatusEnum;
import com.ruoyi.system.emums.ApprovalTypeEnum;
import com.ruoyi.system.mapper.OaApprovalApplicationAssetMapper;
import com.ruoyi.system.model.OaApprovalApplicationAsset;
import com.ruoyi.system.model.OaApprovalApplicationAssetItem;
import com.ruoyi.system.model.OaApprovalApplications;
import com.ruoyi.system.model.OaApprovalFlowNode;
import com.ruoyi.system.service.OaApprovalApplicationAssetItemService;
import com.ruoyi.system.service.OaApprovalApplicationAssetService;
import com.ruoyi.system.service.OaApprovalApplicationsService;
import com.ruoyi.system.service.OaApprovalFlowNodeService;
import com.ruoyi.system.service.OaApprovalTodoService;
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>
 * 资产领用单明细表 服务实现类
 * </p>
 *
 * @author WuGuanFengYue
 * @since 2025-09-15
 */
@Service
@RequiredArgsConstructor
public class OaApprovalApplicationAssetServiceImpl extends ServiceImpl<OaApprovalApplicationAssetMapper, OaApprovalApplicationAsset> implements OaApprovalApplicationAssetService {

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

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void submitReceive(OaApprovalApplicationAssetReceiveDTO dto) {
        if (CollectionUtils.isEmpty(dto.getAssetItems())) {
            throw new ServiceException("领用资产列表不能为空");
        }

        // 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.GRAB.getCode());
        applications.setCurrentFlowNodeId(firstFlowNode.getId());
        oaApprovalApplicationsService.save(applications);

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

        // 4. 保存领用明细
        OaApprovalApplicationAsset detail = buildOaApprovalApplicationAsset(dto, applications.getId());
        this.save(detail);

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

    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);
    }

    private OaApprovalApplications buildOaApprovalApplications(OaApprovalApplicationAssetReceiveDTO dto) {
        OaApprovalApplications applications = new OaApprovalApplications();
        applications.setApplicationCode(generateApplicationCode());
        applications.setApprovalId(ApprovalTypeEnum.GRAB.getCode());
        applications.setApplicantUserId(dto.getApplicantUserId());
        applications.setApplicantName(dto.getApplicantName());
        applications.setDeptId(dto.getDeptId());
        applications.setDeptName(dto.getDeptName());
        applications.setApplicationDate(dto.getOperateTime());
        applications.setApplicationReason(dto.getApplicationReason());
        applications.setAttachmentUrl(dto.getAttachmentUrl());
        applications.setDisabled(0);
        applications.setApprovalStatus(ApprovalStatusEnum.PENDING.getCode());
        return applications;
    }

    private OaApprovalApplicationAsset buildOaApprovalApplicationAsset(OaApprovalApplicationAssetReceiveDTO dto, Integer applicationId) {
        OaApprovalApplicationAsset asset = new OaApprovalApplicationAsset();
        asset.setApprovalApplicationId(applicationId);
        asset.setTitle(dto.getTitle());
        asset.setAssetTypeId(dto.getAssetTypeId());
        asset.setOperateTime(dto.getOperateTime());
        asset.setExpectReturnDate(dto.getExpectReturnDate());
        asset.setType(Boolean.FALSE); // 0-领用
        return asset;
    }

    /**
     * 生成申请单号：LY + yyyyMMdd + 3位序号
     */
    private String generateApplicationCode() {
        String dateStr = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyyMMdd"));
        String prefix = "LY" + dateStr;
        Long count = oaApprovalApplicationsService.lambdaQuery()
                .like(OaApprovalApplications::getApplicationCode, prefix)
                .ge(OaApprovalApplications::getCreateTime, LocalDate.now().atStartOfDay())
                .lt(OaApprovalApplications::getCreateTime, LocalDate.now().plusDays(1).atStartOfDay())
                .count();
        int sequence = (count != null ? count.intValue() : 0) + 1;
        String sequenceStr = String.format("%03d", sequence);
        return prefix + sequenceStr;
    }
}