package com.lianda.backend.service;

import com.lianda.backend.config.DataSource;
import com.lianda.backend.config.RoutingDataSourceConfig;
import com.lianda.backend.dto.PortDTO;
import com.lianda.backend.dto.ShippingCompanyDTO;
import com.lianda.backend.model.BusCustomerCompany;
import com.lianda.backend.model.BusCustomerCompanyBusiness;
import com.lianda.backend.model.BusCustomerCustomerType;
import com.lianda.backend.model.DispPort;
import com.lianda.backend.repository.BusCustomerCompanyBusinessRepository;
import com.lianda.backend.repository.BusCustomerCompanyRepository;
import com.lianda.backend.repository.BusCustomerCustomerTypeRepository;
import com.lianda.backend.repository.DispPortRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * 港口和船公司服务类
 */
@Service
@DataSource(value = RoutingDataSourceConfig.DataSourceType.BRANCH) // 读取分支机构业务数据
public class CommonDataService {

    @Autowired
    private DispPortRepository dispPortRepository;

    @Autowired
    private BusCustomerCompanyBusinessRepository busCustomerCompanyBusinessRepository;

    @Autowired
    private BusCustomerCompanyRepository busCustomerCompanyRepository;

    @Autowired
    private BusCustomerCustomerTypeRepository busCustomerCustomerTypeRepository;

    /**
     * 获取有效的港口列表（RecordStatus=1）
     *
     * @return 港口DTO列表
     */
    public List<PortDTO> getValidPorts() {
        // 查询所有有效港口（RecordStatus=1）
        List<DispPort> validPorts = dispPortRepository.findAll().stream()
                .filter(port -> port.getRecordStatus() != null && port.getRecordStatus() == 1)
                .collect(Collectors.toList());

        return validPorts.stream()
                .map(port -> new PortDTO(port.getPortId(), port.getName(), port.getPortType()))
                .collect(Collectors.toList());
    }

    /**
     * 获取有效的船公司列表（RecordStatus=1且关联到CustomerType=2的记录）
     *
     * @return 船公司DTO列表
     */
    public List<ShippingCompanyDTO> getValidShippingCompanies() {
        // 查询CustomerType=2的所有客户ID
        List<BusCustomerCustomerType> customerTypeRecords = busCustomerCustomerTypeRepository.findByCustomerType(2);
        Set<String> shippingCompanyCustomerIds = customerTypeRecords.stream()
                .map(BusCustomerCustomerType::getCustomerId)
                .collect(Collectors.toSet());

        // 查询所有有效的船公司业务记录（RecordStatus=1）
        List<BusCustomerCompanyBusiness> validBusinessRecords = busCustomerCompanyBusinessRepository.findAll().stream()
                .filter(business -> business.getRecordStatus() != null && business.getRecordStatus() == 1)
                .filter(business -> shippingCompanyCustomerIds.contains(business.getCustomerCompanyId())) // 确保是船公司类型
                .collect(Collectors.toList());

        // 获取这些业务记录对应的客户公司ID
        Set<String> customerCompanyIds = validBusinessRecords.stream()
                .map(BusCustomerCompanyBusiness::getCustomerCompanyId)
                .collect(Collectors.toSet());

        // 查询对应的客户公司信息
        List<BusCustomerCompany> shippingCompanies = busCustomerCompanyRepository.findAll().stream()
                .filter(company -> customerCompanyIds.contains(company.getCustomerCompanyId()))
                .collect(Collectors.toList());

        return shippingCompanies.stream()
                .map(company -> new ShippingCompanyDTO(
                        company.getCustomerCompanyId(),
                        company.getName(),
                        company.getContact(),
                        company.getTel(),
                        company.getMobile()))
                .collect(Collectors.toList());
    }

    /**
     * 搜索船公司（支持分页和模糊搜索）
     *
     * @param companyName 船公司名称（支持模糊搜索）
     * @param pageable 分页参数
     * @return 船公司分页列表
     */
    public Page<ShippingCompanyDTO> searchShippingCompanies(String companyName, Pageable pageable) {
        // 查询CustomerType=2的所有客户ID
        List<BusCustomerCustomerType> customerTypeRecords = busCustomerCustomerTypeRepository.findByCustomerType(2);
        Set<String> shippingCompanyCustomerIds = customerTypeRecords.stream()
                .map(BusCustomerCustomerType::getCustomerId)
                .collect(Collectors.toSet());

        // 查询所有有效的船公司业务记录（RecordStatus=1）
        List<BusCustomerCompanyBusiness> validBusinessRecords = busCustomerCompanyBusinessRepository.findAll().stream()
                .filter(business -> business.getRecordStatus() != null && business.getRecordStatus() == 1)
                .filter(business -> shippingCompanyCustomerIds.contains(business.getCustomerCompanyId()))
                .collect(Collectors.toList());

        // 获取这些业务记录对应的客户公司ID
        Set<String> customerCompanyIds = validBusinessRecords.stream()
                .map(BusCustomerCompanyBusiness::getCustomerCompanyId)
                .collect(Collectors.toSet());

        // 查询对应的客户公司信息（支持模糊搜索）
        List<BusCustomerCompany> allCompanies;
        if (companyName != null && !companyName.isEmpty()) {
            allCompanies = busCustomerCompanyRepository.findByNameContainingAndRecordStatus(
                    companyName, 1);
        } else {
            allCompanies = busCustomerCompanyRepository.findAll();
        }

        // 过滤出船公司类型的数据并转换为DTO
        List<ShippingCompanyDTO> filteredCompanies = allCompanies.stream()
                .filter(company -> customerCompanyIds.contains(company.getCustomerCompanyId()))
                .map(company -> new ShippingCompanyDTO(
                        company.getCustomerCompanyId(),
                        company.getName(),
                        company.getContact(),
                        company.getTel(),
                        company.getMobile()))
                .collect(Collectors.toList());

        // 手动分页
        int pageSize = pageable.getPageSize();
        int currentPage = pageable.getPageNumber();
        int start = currentPage * pageSize;
        int end = Math.min(start + pageSize, filteredCompanies.size());

        List<ShippingCompanyDTO> pageContent = filteredCompanies.subList(start, end);

        // 创建新的Page对象
        return new org.springframework.data.domain.PageImpl<>(
                pageContent,
                pageable,
                filteredCompanies.size()
        );
    }
}