package com.vincent.rsf.openApi.service.impl;

import com.vincent.rsf.openApi.security.service.AppAuthService;
import com.vincent.rsf.openApi.service.TokenService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;

@Slf4j
@Service
public class TokenServiceImpl implements TokenService {

    private static final long EXPIRE_MS = 60 * 60 * 1000L;

    @Autowired
    private AppAuthService appAuthService;

    private final Map<String, Long> tokenExpire = new ConcurrentHashMap<>();

    @Override
    public String issueToken(String appId, String appSecret) {
        if (!StringUtils.hasText(appId) || !StringUtils.hasText(appSecret)) {
            return null;
        }
        if (!appAuthService.validateApp(appId, appSecret)) {
            return null;
        }
        String token = UUID.randomUUID().toString().replace("-", "");
        tokenExpire.put(token, System.currentTimeMillis() + EXPIRE_MS);
        evictExpired();
        return token;
    }

    @Override
    public boolean validateToken(String token) {
        if (!StringUtils.hasText(token)) {
            return false;
        }
        Long expire = tokenExpire.get(token);
        if (expire == null || System.currentTimeMillis() > expire) {
            tokenExpire.remove(token);
            return false;
        }
        return true;
    }

    private void evictExpired() {
        long now = System.currentTimeMillis();
        tokenExpire.entrySet().removeIf(e -> e.getValue() < now);
    }
}