package com.yau.digitalrmb.institutionidentity.application;

import com.yau.digitalrmb.security.context.JwtUser;
import com.yau.digitalrmb.security.application.CurrentUser;
import com.yau.digitalrmb.shared.api.ErrorCode;
import com.yau.digitalrmb.shared.exception.BusinessException;

public class InstitutionKeySubject {
    private final String userId;
    private final long schoolId;
    private final long classId;
    private final String userName;
    private final String phone;

    public InstitutionKeySubject(String userId, long schoolId, long classId) {
        this(userId, schoolId, classId, null, null);
    }

    public InstitutionKeySubject(String userId, long schoolId, long classId, String userName, String phone) {
        this.userId = userId;
        this.schoolId = schoolId;
        this.classId = classId;
        this.userName = userName;
        this.phone = phone;
    }

    public static InstitutionKeySubject from(JwtUser jwtUser) {
        return new InstitutionKeySubject(jwtUser.getUserId(), requiredLong(jwtUser.getSchoolId(), "schoolId"),
                requiredLong(jwtUser.getClassId(), "classId"), jwtUser.getUserName(), jwtUser.getPhone());
    }

    public static InstitutionKeySubject from(CurrentUser currentUser) {
        if (currentUser == null || currentUser.getUserId() == null || currentUser.getUserId().trim().isEmpty()) {
            throw new BusinessException(ErrorCode.UNAUTHORIZED, "当前用户ID不能为空");
        }
        return new InstitutionKeySubject(currentUser.getUserId(), requiredLong(currentUser.getSchoolId(), "schoolId"),
                requiredLong(currentUser.getClassId(), "classId"));
    }

    private static long requiredLong(String value, String claim) {
        if (value == null) {
            throw new BusinessException(ErrorCode.UNAUTHORIZED, "Token缺少" + claim);
        }
        try {
            return Long.parseLong(value);
        } catch (NumberFormatException exception) {
            throw new BusinessException(ErrorCode.UNAUTHORIZED, "Token中的" + claim + "格式不正确");
        }
    }

    public String getUserId() { return userId; }
    public long getSchoolId() { return schoolId; }
    public long getClassId() { return classId; }
    public String getUserName() { return userName; }
    public String getPhone() { return phone; }
}