package com.sb.web.admin.service;

import com.sb.web.auth.domain.Member;
import com.sb.web.auth.dto.MemberAdminResponse;
import com.sb.web.auth.mapper.MemberMapper;
import com.sb.web.common.exception.ApiException;
import lombok.RequiredArgsConstructor;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * 관리자용 회원 관리 서비스. (목록/역할/상태/삭제)
 * 본인 계정에 대한 역할·상태·삭제는 잠금 방지를 위해 차단한다.
 */
@Service
@RequiredArgsConstructor
public class MemberAdminService {

    private final MemberMapper memberMapper;

    public List<MemberAdminResponse> list() {
        return memberMapper.findAll().stream().map(MemberAdminResponse::from).toList();
    }

    @Transactional
    public MemberAdminResponse updateRole(Long targetId, String role, Long currentAdminId) {
        Member target = mustFind(targetId);
        if (targetId.equals(currentAdminId)) {
            throw new ApiException(HttpStatus.BAD_REQUEST, "본인의 역할은 변경할 수 없습니다.");
        }
        memberMapper.updateRole(targetId, role);
        target.setRole(role);
        return MemberAdminResponse.from(target);
    }

    @Transactional
    public MemberAdminResponse updatePlan(Long targetId, String plan, Long currentAdminId) {
        Member target = mustFind(targetId);
        memberMapper.updatePlan(targetId, plan);
        target.setPlan(plan);
        return MemberAdminResponse.from(target);
    }

    @Transactional
    public MemberAdminResponse updateStatus(Long targetId, String status, Long currentAdminId) {
        Member target = mustFind(targetId);
        if (targetId.equals(currentAdminId)) {
            throw new ApiException(HttpStatus.BAD_REQUEST, "본인의 상태는 변경할 수 없습니다.");
        }
        memberMapper.updateStatus(targetId, status);
        target.setStatus(status);
        return MemberAdminResponse.from(target);
    }

    @Transactional
    public void delete(Long targetId, Long currentAdminId) {
        mustFind(targetId);
        if (targetId.equals(currentAdminId)) {
            throw new ApiException(HttpStatus.BAD_REQUEST, "본인 계정은 삭제할 수 없습니다.");
        }
        memberMapper.deleteById(targetId);
    }

    private Member mustFind(Long id) {
        Member m = memberMapper.findById(id);
        if (m == null) {
            throw new ApiException(HttpStatus.NOT_FOUND, "회원을 찾을 수 없습니다.");
        }
        return m;
    }
}