package com.ruoyi.business.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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.basic.entity.CoalField;
import com.ruoyi.basic.entity.CoalValue;
import com.ruoyi.basic.mapper.CoalFieldMapper;
import com.ruoyi.basic.mapper.CoalValueMapper;
import com.ruoyi.business.dto.OfficialInventoryDto;
import com.ruoyi.business.entity.OfficialInventory;
import com.ruoyi.business.mapper.OfficialInventoryMapper;
import com.ruoyi.business.mapper.PendingInventoryMapper;
import com.ruoyi.business.service.OfficialInventoryService;
import com.ruoyi.common.utils.bean.BeanUtils;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * <p>
 * 正式库存表 服务实现类
 * </p>
 *
 * @author ruoyi
 * @since 2025-06-04
 */
@Service
@RequiredArgsConstructor
public class OfficialInventoryServiceImpl extends ServiceImpl<OfficialInventoryMapper, OfficialInventory> implements OfficialInventoryService {

    private final OfficialInventoryMapper officialInventoryMapper;

    private final CoalValueMapper coalValueMapper;

    private final CoalFieldMapper coalFieldMapper;

    private final PendingInventoryMapper pendingInventoryMapper;

    @Override
    public IPage<OfficialInventoryDto> selectOfficialInventoryList(Page page, OfficialInventoryDto officialInventoryDto) {

        //  先查出原始数据（OfficialInventory）
        LambdaQueryWrapper<OfficialInventory> queryWrapper = new LambdaQueryWrapper<>();
        IPage<OfficialInventory> entityPage = officialInventoryMapper.selectPage(page, queryWrapper);

        //  创建一个新的 Dto 分页结果
        IPage<OfficialInventoryDto> dtoPage = new Page<>();
        BeanUtils.copyProperties(entityPage, dtoPage);

        List<OfficialInventoryDto> dtoList = new ArrayList<>();

        //  查询所有可用字段（CoalField）
        List<CoalField> coalFields = coalFieldMapper.selectList(null);
        List<String> allFieldNames = coalFields.stream()
                .map(CoalField::getFields)
                .distinct()
                .collect(Collectors.toList());

        //  遍历每条记录，进行转换并填充 fields
        for (OfficialInventory entity : entityPage.getRecords()) {
            OfficialInventoryDto dto = new OfficialInventoryDto();
            BeanUtils.copyProperties(entity, dto); 

            Long pendingId = entity.getPendingId();

            //  查询该 pendingId 对应的 CoalValue 数据
            List<CoalValue> coalValues = coalValueMapper.selectList(
                    new LambdaQueryWrapper<CoalValue>().eq(CoalValue::getPlanId, pendingId)
            );

            //  构建 Map<fieldName, value>
            Map<String, String> fieldValueMap = coalValues.stream()
                    .collect(Collectors.toMap(
                            CoalValue::getFields,
                            CoalValue::getCoalValue,
                            (existing, replacement) -> existing // 重复字段保留第一个
                    ));

            // 构造最终 fields 列表，包含所有字段名，并设置默认值 "-"
            List<Map<String, String>> fields = new ArrayList<>();
            for (String field : allFieldNames) {
                Map<String, String> fieldMap = new HashMap<>();
                fieldMap.put(field, fieldValueMap.getOrDefault(field, "-"));
                fields.add(fieldMap);
            }

            // 设置到 DTO 中
            dto.setFields(fields);
            dtoList.add(dto);
        }

        dtoPage.setRecords(dtoList); // 设置转换后的 DtoList
        return dtoPage;
    }
}