package com.xuqm.license.service;

import com.xuqm.common.security.JwtUtil;
import org.springframework.stereotype.Service;

import java.util.Map;

@Service
public class LicenseAuthService {

    private final JwtUtil jwtUtil;

    public LicenseAuthService(JwtUtil jwtUtil) {
        this.jwtUtil = jwtUtil;
    }

    public String generateToken(String appKey, String deviceId, String recordId) {
        return jwtUtil.generate(deviceId, Map.of(
                "appKey", appKey,
                "deviceId", deviceId,
                "recordId", recordId
        ));
    }

    public boolean verifyTokenPayload(String token, String appKey, String deviceId) {
        try {
            var claims = jwtUtil.parse(token);
            String claimAppKey = claims.get("appKey", String.class);
            String claimDeviceId = firstNonNull(claims.get("deviceId", String.class), claims.get("device_id", String.class));
            return appKey.equals(claimAppKey) && deviceId.equals(claimDeviceId);
        } catch (Exception e) {
            return false;
        }
    }

    public String getRecordIdFromToken(String token) {
        try {
            var claims = jwtUtil.parse(token);
            return firstNonNull(claims.get("recordId", String.class), claims.get("record_id", String.class));
        } catch (Exception e) {
            return null;
        }
    }

    private static String firstNonNull(String value, String fallback) {
        return value != null ? value : fallback;
    }
}