package com.glxp.api.service.thrsys;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.io.FileUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.glxp.api.dao.thrsys.ThirdAliDrugMapper;
import com.glxp.api.entity.thrsys.ThirdAliDrug;
import com.glxp.api.exception.JsonException;
import com.glxp.api.req.thrsys.ThirdAliDrugRequest;
import com.glxp.api.service.auth.CustomerService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;


@Service
@Slf4j
public class ThirdAliDrugService extends ServiceImpl<ThirdAliDrugMapper, ThirdAliDrug> {

    @Resource
    private CustomerService customerService;

    //解析TXT获取对应的对象列表
    @Transactional(rollbackFor = Exception.class)
    public void txtUpload(MultipartFile file) {

        try {
            String fileName = file.getOriginalFilename();
            String suffix = FileUtil.getSuffix(fileName);
            if (!"txt".equals(suffix)) {
                throw new JsonException("仅支持TXT，文件类型错误" + suffix);
            }
            log.info(file.getSize() + "文件长度");
            if (file.getSize() > 100 * 1024 * 1024) {
                throw new JsonException("上传文件超过100M");
            }
            List<ThirdAliDrug> thirdAliDrugs = new ArrayList<>();
            String customerId = customerService.getCustomerId();

            try (BufferedReader br = new BufferedReader(new InputStreamReader(file.getInputStream()))) {
                String line;
                while ((line = br.readLine()) != null) {

                    String[] fields = fillEmptyParts(line);

                    Date createTime = new Date();
                    if (fields.length == 11) {
                        ThirdAliDrug medicine = new ThirdAliDrug(
                                fields[0].trim(),
                                fields[1].trim(),
                                fields[2].trim(),
                                fields[3].trim(),
                                fields[4].trim(),
                                fields[5].trim(),
                                fields[6].trim(),
                                fields[7].trim(),
                                fields[8].trim(),
                                fields[9].trim(),
                                fields[10].trim(),
                                createTime,
                                createTime
                        );

                        if (StrUtil.isNotEmpty(medicine.getNameCode())) {
                            int i = this.baseMapper.selectDrugsByNameCodes(medicine.getNameCode());
                            if (i == 0) {
                                medicine.setErpId(customerId);
                                thirdAliDrugs.add(medicine);
                                if (CollUtil.isNotEmpty(thirdAliDrugs) && thirdAliDrugs.size() >= 500) {
                                    this.baseMapper.saveOrUpdateBatch(thirdAliDrugs);
                                    thirdAliDrugs.clear();
                                }
                            }
                        }
                    }
                }
            } catch (IOException e) {
                throw new JsonException("上传失败：" + "标识重复");
            }

            if (CollUtil.isNotEmpty(thirdAliDrugs)) {
                this.baseMapper.saveOrUpdateBatch(thirdAliDrugs);
            }

        } catch (Exception e) {
            throw new JsonException("上传失败：" + e.getMessage());
        }

    }


    public static String[] fillEmptyParts(String input) {
        // Step 1: Split the input string by commas
        String[] parts = input.split(",");

        // Step 2: Count the number of commas (which will be one less than the number of parts we want)
        // But we need to account for leading/trailing commas as well, so we use a different approach
        int commaCount = 0;
        boolean inEmptyPart = true; // To handle leading commas
        for (char c : input.toCharArray()) {
            if (c == ',') {
                commaCount++;
                inEmptyPart = true; // Next part will be empty until we find non-comma characters
            } else if (inEmptyPart && c != ' ') {
                inEmptyPart = false; // We found the start of a non-empty part
            }
        }

        int desiredArraySize = Math.max(commaCount + 1, parts.length);

        String[] filledParts = new String[desiredArraySize];
        Arrays.fill(filledParts, "");

        int index = 0;
        for (String part : parts) {
            if (!part.trim().isEmpty()) {
                filledParts[index++] = part.trim(); // Trim any surrounding spaces for cleanliness
            }
        }

        return filledParts;
    }


    public List<ThirdAliDrug> filterList(ThirdAliDrugRequest thirdAliDrug) {
        if (thirdAliDrug == null) {
            return Collections.emptyList();
        }
        // 分页处理
        thirdAliDrug.pageDispose();
        return this.baseMapper.filterList(thirdAliDrug);
    }




}