package com.ibeetl.admin.core.conf;

import java.lang.reflect.Method;
import java.util.Date;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.ibeetl.admin.core.annotation.Function;
import com.ibeetl.admin.core.entity.CoreAudit;
import com.ibeetl.admin.core.entity.CoreFunction;
import com.ibeetl.admin.core.entity.CoreUser;
import com.ibeetl.admin.core.service.CoreAuditService;
import com.ibeetl.admin.core.service.CorePlatformService;
import com.ibeetl.admin.core.util.FunctionLocal;
import com.ibeetl.admin.core.util.HttpRequestLocal;
import com.ibeetl.admin.core.util.PlatformException;

/**
 * 在springboot-plus中，有两种权限：功能点（或者说一个个controller方法）和数据权限。
 * 菜单实际上也是绑定在了功能点中
 * @author 一日看尽长安花
 * */
@Aspect
@Component
public class RbacAnnotationConfig {
  @Autowired CorePlatformService platformService;
  @Autowired CoreAuditService sysAuditService;
  @Autowired HttpRequestLocal httpRequestLocal;

  @Autowired Environment env;

  ObjectMapper jsonMapper = new ObjectMapper();
  private final Log log = LogFactory.getLog(this.getClass());

  @org.aspectj.lang.annotation.Around(
      "within(@org.springframework.stereotype.Controller *) && @annotation(function)")
  public Object functionAccessCheck(final ProceedingJoinPoint pjp, Function function)
      throws Throwable {
    // debug
    String funCode = null;
    CoreUser user = null;
    Method m = null;
    try {

      if (function != null) {
        funCode = function.value();
        user = platformService.getCurrentUser();
        Long orgId = platformService.getCurrentOrgId();
        boolean access = platformService.canAcessFunction(user.getId(), orgId, funCode);
        if (!access) {
          log.warn(jsonMapper.writeValueAsString(user) + "试图访问未授权功能 " + funCode);
          throw new PlatformException("试图访问未授权功能");
        }
        FunctionLocal.set(funCode);
      }

      Object o = pjp.proceed();
      if (function != null) {
        MethodSignature ms = (MethodSignature) pjp.getSignature();
        m = ms.getMethod();
        createAudit(funCode, function.name(), user, true, "", m);
      }
      return o;

    } catch (Throwable e) {
      if (function != null) {
        createAudit(funCode, function.name(), user, false, e.getMessage(), m);
      }
      throw e;
    }
  }

  private void createAudit(
      String functionCode,
      String functionName,
      CoreUser user,
      boolean success,
      String msg,
      Method m) {
    boolean enable = env.getProperty("audit.enable", Boolean.class, false);
    if (!enable) {
      return;
    }
    if (filter(m, functionCode)) {
      return;
    }

    CoreAudit audit = new CoreAudit();
    if (StringUtils.isEmpty(functionName)) {
      CoreFunction fun = this.platformService.getFunction(functionCode);

      if (fun == null) {
        // 没有在数据库定义，但写在代码里了
        log.warn(functionCode + " 未在数据库里定义");
        functionName = "未定义";
      } else {
        functionName = fun.getName();
      }
    }
    audit.setCreateTime(new Date());
    audit.setFunctionCode(functionCode);
    audit.setFunctionName(functionName);
    audit.setUserId(user.getId());
    audit.setSuccess(success ? 1 : 0);
    audit.setUserName(user.getName());
    audit.setMessage(msg);

    audit.setIp(httpRequestLocal.getRequestIP());
    sysAuditService.save(audit);
  }

  private boolean filter(Method m, String functionCode) {
    if (functionCode.startsWith("audit.")) {
      return true;
    }
    String uri = httpRequestLocal.getRequestURI();
    if (uri != null && uri.endsWith("/index/condition.json")) {

      return true;
    } else {
      return false;
    }
  }
}
