/*Copyright ©2016 TommyLemon(https://github.com/TommyLemon/APIJSON)

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.*/

package zuo.biao.apijson.server;

import static zuo.biao.apijson.JSONObject.KEY_EXPLAIN;
import static zuo.biao.apijson.RequestMethod.GET;

import java.io.UnsupportedEncodingException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.concurrent.TimeoutException;

import javax.activation.UnsupportedDataTypeException;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import zuo.biao.apijson.JSON;
import zuo.biao.apijson.JSONResponse;
import zuo.biao.apijson.Log;
import zuo.biao.apijson.NotNull;
import zuo.biao.apijson.RequestMethod;
import zuo.biao.apijson.RequestRole;
import zuo.biao.apijson.StringUtil;
import zuo.biao.apijson.server.exception.ConditionErrorException;
import zuo.biao.apijson.server.exception.ConflictException;
import zuo.biao.apijson.server.exception.NotExistException;
import zuo.biao.apijson.server.exception.NotLoggedInException;
import zuo.biao.apijson.server.exception.OutOfRangeException;

/**parser for parsing request to JSONObject
 * @author Lemon
 */
public abstract class AbstractParser<T> implements Parser<T>, SQLCreator {
	protected static final String TAG = "AbstractParser";


	/**
	 * GET
	 */
	public AbstractParser() {
		this(null);
	}
	/**
	 * @param requestMethod null ? requestMethod = GET
	 */
	public AbstractParser(RequestMethod method) {
		this(method, false);
	}


	/**
	 * @param requestMethod null ? requestMethod = GET
	 * @param noVerify 仅限于为服务端提供方法免验证特权，普通请求不要设置为true！ 如果对应Table有权限也建议用默认值false，保持和客户端权限一致
	 */
	public AbstractParser(RequestMethod method, boolean noVerify) {
		super();
		setMethod(method);
		setNoVerify(noVerify);
	}

	@NotNull
	protected Visitor<T> visitor;
	@NotNull
	@Override
	public Visitor<T> getVisitor() {
		if (visitor == null) {
			visitor = new Visitor<T>() {

				@Override
				public T getId() {
					return null;
				}

				@Override
				public List<T> getContactIdList() {
					return null;
				}
			};
		}
		return visitor;
	}
	@Override
	public AbstractParser<T> setVisitor(@NotNull Visitor<T> visitor) {
		this.visitor = visitor;
		return this;
	}

	protected RequestMethod requestMethod;
	@NotNull
	@Override
	public RequestMethod getMethod() {
		return requestMethod;
	}
	@NotNull
	@Override
	public AbstractParser<T> setMethod(RequestMethod method) {
		this.requestMethod = method == null ? GET : method;
		return this;
	}

	protected JSONObject requestObject;
	@Override
	public JSONObject getRequest() {
		return requestObject;
	}
	@Override
	public AbstractParser<T> setRequest(JSONObject request) {
		this.requestObject = request;
		return this;
	}

	protected Boolean globleFormat;
	public AbstractParser<T> setGlobleFormat(Boolean globleFormat) {
		this.globleFormat = globleFormat;
		return this;
	}
	@Override
	public Boolean getGlobleFormat() {
		return globleFormat;
	}
	protected RequestRole globleRole;
	public AbstractParser<T> setGlobleRole(RequestRole globleRole) {
		this.globleRole = globleRole;
		return this;
	}
	@Override
	public RequestRole getGlobleRole() {
		return globleRole;
	}
	protected String globleDatabase;
	public AbstractParser<T> setGlobleDatabase(String globleDatabase) {
		this.globleDatabase = globleDatabase;
		return this;
	}
	@Override
	public String getGlobleDatabase() {
		return globleDatabase;
	}
	protected String globleSchema;
	public AbstractParser<T> setGlobleSchema(String globleSchema) {
		this.globleSchema = globleSchema;
		return this;
	}
	@Override
	public String getGlobleSchema() {
		return globleSchema;
	}
	protected Boolean globleExplain;
	public AbstractParser<T> setGlobleExplain(Boolean globleExplain) {
		this.globleExplain = globleExplain;
		return this;
	}
	@Override
	public Boolean getGlobleExplain() {
		return globleExplain;
	}
	protected String globleCache;
	public AbstractParser<T> setGlobleCache(String globleCache) {
		this.globleCache = globleCache;
		return this;
	}
	@Override
	public String getGlobleCache() {
		return globleCache;
	}

	@Override
	public boolean isNoVerify() {
		return noVerifyLogin && noVerifyRole && noVerifyContent;
	}
	@Override
	public AbstractParser<T> setNoVerify(boolean noVerify) {
		setNoVerifyLogin(noVerify);
		setNoVerifyRole(noVerify);
		setNoVerifyContent(noVerify);
		return this;
	}

	protected boolean noVerifyLogin;
	@Override
	public boolean isNoVerifyLogin() {
		return noVerifyLogin;
	}
	@Override
	public AbstractParser<T> setNoVerifyLogin(boolean noVerifyLogin) {
		this.noVerifyLogin = noVerifyLogin;
		return this;
	}
	protected boolean noVerifyRole;
	@Override
	public boolean isNoVerifyRole() {
		return noVerifyRole;
	}
	@Override
	public AbstractParser<T> setNoVerifyRole(boolean noVerifyRole) {
		this.noVerifyRole = noVerifyRole;
		return this;
	}
	protected boolean noVerifyContent;
	@Override
	public boolean isNoVerifyContent() {
		return noVerifyContent;
	}
	@Override
	public AbstractParser<T> setNoVerifyContent(boolean noVerifyContent) {
		this.noVerifyContent = noVerifyContent;
		return this;
	}





	protected SQLExecutor sqlExecutor;
	protected Verifier<T> verifier;
	protected Map<String, Object> queryResultMap;//path-result

	@Override
	public SQLExecutor getSQLExecutor() {
		return sqlExecutor;
	}
	@Override
	public Verifier<T> getVerifier() {
		return verifier;
	}

	/**解析请求json并获取对应结果
	 * @param request
	 * @return
	 */
	@Override
	public String parse(String request) {
		return JSON.toJSONString(parseResponse(request));
	}
	/**解析请求json并获取对应结果
	 * @param request
	 * @return
	 */
	@NotNull
	@Override
	public String parse(JSONObject request) {
		return JSON.toJSONString(parseResponse(request));
	}

	/**解析请求json并获取对应结果
	 * @param request 先parseRequest中URLDecoder.decode(request, UTF_8);再parseResponse(getCorrectRequest(...))
	 * @return parseResponse(requestObject);
	 */
	@NotNull
	@Override
	public JSONObject parseResponse(String request) {
		Log.d(TAG, "\n\n\n\n<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n"
				+ requestMethod + "/parseResponse  request = \n" + request + "\n\n");

		try {
			requestObject = parseRequest(request);
		} catch (Exception e) {
			return newErrorResult(e);
		}

		return parseResponse(requestObject);
	}

	private int queryDepth;

	/**解析请求json并获取对应结果
	 * @param request
	 * @return requestObject
	 */
	@NotNull
	@Override
	public JSONObject parseResponse(JSONObject request) {
		long startTime = System.currentTimeMillis();
		Log.d(TAG, "parseResponse  startTime = " + startTime
				+ "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n\n\n ");

		requestObject = request;

		verifier = createVerifier().setVisitor(getVisitor());

		if (RequestMethod.isPublicMethod(requestMethod) == false) {
			try {
				if (noVerifyLogin == false) {
					onVerifyLogin();
				}
				if (noVerifyContent == false) {
					onVerifyContent();
				}
			} catch (Exception e) {
				return extendErrorResult(requestObject, e);
			}
		}

		//必须在parseCorrectRequest后面，因为parseCorrectRequest可能会添加 @role
		if (noVerifyRole == false && globleRole == null) {
			try {
				setGlobleRole(RequestRole.get(requestObject.getString(JSONRequest.KEY_ROLE)));
				requestObject.remove(JSONRequest.KEY_ROLE);
			} catch (Exception e) {
				return extendErrorResult(requestObject, e);
			}
		}

		try {
			setGlobleFormat(requestObject.getBoolean(JSONRequest.KEY_FORMAT));
			setGlobleDatabase(requestObject.getString(JSONRequest.KEY_DATABASE));
			setGlobleSchema(requestObject.getString(JSONRequest.KEY_SCHEMA));
			setGlobleExplain(requestObject.getBoolean(JSONRequest.KEY_EXPLAIN));
			setGlobleCache(requestObject.getString(JSONRequest.KEY_CACHE));

			requestObject.remove(JSONRequest.KEY_FORMAT);
			requestObject.remove(JSONRequest.KEY_DATABASE);
			requestObject.remove(JSONRequest.KEY_SCHEMA);
			requestObject.remove(JSONRequest.KEY_EXPLAIN);
			requestObject.remove(JSONRequest.KEY_CACHE);
		} catch (Exception e) {
			return extendErrorResult(requestObject, e);
		}

		final String requestString = JSON.toJSONString(request);//request传进去解析后已经变了


		queryResultMap = new HashMap<String, Object>();

		Exception error = null;
		sqlExecutor = createSQLExecutor();
		try {
			queryDepth = 0;
			requestObject = onObjectParse(request, null, null, null, false);
		} catch (Exception e) {
			e.printStackTrace();
			error = e;
		}

		requestObject = error == null ? extendSuccessResult(requestObject) : extendErrorResult(requestObject, error);

		JSONObject res = (globleFormat != null && globleFormat) && JSONResponse.isSuccess(requestObject) ? new JSONResponse(requestObject) : requestObject;

		long endTime = System.currentTimeMillis();
		long duration = endTime - startTime;

		if (Log.DEBUG) {
			requestObject.put("sql:generate/cache/execute/maxExecute", sqlExecutor.getGeneratedSQLCount() + "/" + sqlExecutor.getCachedSQLCount() + "/" + sqlExecutor.getExecutedSQLCount() + "/" + getMaxSQLCount());
			requestObject.put("depth:count/max", queryDepth + "/" + getMaxQueryDepth());
			requestObject.put("time:start/duration/end", startTime + "/" + duration + "/" + endTime);
		}

		sqlExecutor.close();
		sqlExecutor = null;
		queryResultMap.clear();
		queryResultMap = null;

		//会不会导致原来的session = null？		session = null;

		if (Log.DEBUG) {
			Log.d(TAG, "\n\n\n\n<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n "
					+ requestMethod + "/parseResponse  request = \n" + requestString + "\n\n");

			Log.d(TAG, "parseResponse  return response = \n" + JSON.toJSONString(requestObject)
			+ "\n >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> \n\n\n");
		}
		Log.d(TAG, "parseResponse  endTime = " + endTime + ";  duration = " + duration
				+ ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n\n\n");

		return res;
	}


	@Override
	public void onVerifyLogin() throws Exception {
		verifier.verifyLogin();
	}
	@Override
	public void onVerifyContent() throws Exception {
		requestObject = parseCorrectRequest();
	}
	/**校验角色及对应操作的权限
	 * @param config
	 * @return
	 * @throws Exception
	 */
	@Override
	public void onVerifyRole(@NotNull SQLConfig config) throws Exception {
		if (Log.DEBUG) {
			Log.i(TAG, "onVerifyRole  config = " + JSON.toJSONString(config));
		}

		if (noVerifyRole == false) {
			if (config.getRole() == null) {
				if (globleRole != null) {
					config.setRole(globleRole);
				} else {
					config.setRole(getVisitor().getId() == null ? RequestRole.UNKNOWN : RequestRole.LOGIN);
				}
			}
			verifier.verify(config);
		}

	}


	/**解析请求JSONObject
	 * @param request => URLDecoder.decode(request, UTF_8);
	 * @return
	 * @throws Exception 
	 */
	@NotNull
	public static JSONObject parseRequest(String request) throws Exception {
		JSONObject obj = JSON.parseObject(request);
		if (obj == null) {
			throw new UnsupportedEncodingException("JSON格式不合法！");
		}
		return obj;
	}

	@Override
	public JSONObject parseCorrectRequest(JSONObject target) throws Exception {
		return Structure.parseRequest(requestMethod, "", target, requestObject, getMaxUpdateCount(), this);
	}


	/**新建带状态内容的JSONObject
	 * @param code
	 * @param msg
	 * @return
	 */
	public static JSONObject newResult(int code, String msg) {
		return extendResult(null, code, msg);
	}
	/**添加JSONObject的状态内容，一般用于错误提示结果
	 * @param object
	 * @param code
	 * @param msg
	 * @return
	 */
	public static JSONObject extendResult(JSONObject object, int code, String msg) {
		if (object == null) {
			object = new JSONObject(true);
		}
		if (object.containsKey(JSONResponse.KEY_CODE) == false) {
			object.put(JSONResponse.KEY_CODE, code);
		}
		String m = StringUtil.getString(object.getString(JSONResponse.KEY_MSG));
		if (m.isEmpty() == false) {
			msg = m + " ;\n " + StringUtil.getString(msg);
		}
		object.put(JSONResponse.KEY_MSG, msg);
		return object;
	}


	/**添加请求成功的状态内容
	 * @param object
	 * @return
	 */
	public static JSONObject extendSuccessResult(JSONObject object) {
		return extendResult(object, JSONResponse.CODE_SUCCESS, JSONResponse.MSG_SUCCEED);
	}
	/**获取请求成功的状态内容
	 * @return
	 */
	public static JSONObject newSuccessResult() {
		return newResult(JSONResponse.CODE_SUCCESS, JSONResponse.MSG_SUCCEED);
	}
	/**添加请求成功的状态内容
	 * @param object
	 * @return
	 */
	public static JSONObject extendErrorResult(JSONObject object, Exception e) {
		JSONObject error = newErrorResult(e);
		return extendResult(object, error.getIntValue(JSONResponse.KEY_CODE), error.getString(JSONResponse.KEY_MSG));
	}
	/**新建错误状态内容
	 * @param e
	 * @return
	 */
	public static JSONObject newErrorResult(Exception e) {
		if (e != null) {
			e.printStackTrace();

			int code;
			if (e instanceof UnsupportedEncodingException) {
				code = JSONResponse.CODE_UNSUPPORTED_ENCODING;
			} 
			else if (e instanceof IllegalAccessException) {
				code = JSONResponse.CODE_ILLEGAL_ACCESS;
			}
			else if (e instanceof UnsupportedOperationException) {
				code = JSONResponse.CODE_UNSUPPORTED_OPERATION;
			}
			else if (e instanceof NotExistException) {
				code = JSONResponse.CODE_NOT_FOUND;
			}
			else if (e instanceof IllegalArgumentException) {
				code = JSONResponse.CODE_ILLEGAL_ARGUMENT;
			}
			else if (e instanceof NotLoggedInException) {
				code = JSONResponse.CODE_NOT_LOGGED_IN;
			}
			else if (e instanceof TimeoutException) {
				code = JSONResponse.CODE_TIME_OUT;
			} 
			else if (e instanceof ConflictException) {
				code = JSONResponse.CODE_CONFLICT;
			}
			else if (e instanceof ConditionErrorException) {
				code = JSONResponse.CODE_CONDITION_ERROR;
			}
			else if (e instanceof UnsupportedDataTypeException) {
				code = JSONResponse.CODE_UNSUPPORTED_TYPE;
			}
			else if (e instanceof OutOfRangeException) {
				code = JSONResponse.CODE_OUT_OF_RANGE;
			}
			else if (e instanceof NullPointerException) {
				code = JSONResponse.CODE_NULL_POINTER;
			}
			else {
				code = JSONResponse.CODE_SERVER_ERROR;
			}

			return newResult(code, e.getMessage());
		}

		return newResult(JSONResponse.CODE_SERVER_ERROR, JSONResponse.MSG_SERVER_ERROR);
	}




	//TODO 启动时一次性加载Request所有内容，作为初始化。
	/**获取正确的请求，非GET请求必须是服务器指定的
	 * @param method
	 * @param request
	 * @return
	 * @throws Exception 
	 */
	@Override
	public JSONObject parseCorrectRequest() throws Exception {
		if (RequestMethod.isPublicMethod(requestMethod)) {
			return requestObject;//需要指定JSON结构的get请求可以改为post请求。一般只有对安全性要求高的才会指定，而这种情况用明文的GET方式几乎肯定不安全
		}

		String tag = requestObject.getString(JSONRequest.KEY_TAG);
		if (StringUtil.isNotEmpty(tag, true) == false) {
			throw new IllegalArgumentException("请在最外层设置tag！一般是Table名，例如 \"tag\": \"User\" ");
		}
		int version = requestObject.getIntValue(JSONRequest.KEY_VERSION);

		JSONObject object = null;
		String error = "";
		try {
			object = getStructure("Request", JSONRequest.KEY_TAG, tag, version);
		} catch (Exception e) {
			error = e.getMessage();
		}
		if (object == null) {//empty表示随意操作  || object.isEmpty()) {
			throw new UnsupportedOperationException("非开放请求必须是Request表中校验规则允许的操作！\n " + error);
		}

		JSONObject target = null;
		if (zuo.biao.apijson.JSONObject.isTableKey(tag) && object.containsKey(tag) == false) {//tag是table名
			target = new JSONObject(true);
			target.put(tag, object);
		} else {
			target = object;
		}
		//获取指定的JSON结构 >>>>>>>>>>>>>>

		requestObject.remove(JSONRequest.KEY_TAG);
		requestObject.remove(JSONRequest.KEY_VERSION);
		return parseCorrectRequest((JSONObject) target.clone());
	}


	//TODO 优化性能！
	/**获取正确的返回结果
	 * @param method
	 * @param response
	 * @return
	 * @throws Exception 
	 */
	@Override
	public JSONObject parseCorrectResponse(String table, JSONObject response) throws Exception {
		//		Log.d(TAG, "getCorrectResponse  method = " + method + "; table = " + table);
		//		if (response == null || response.isEmpty()) {//避免无效空result:{}添加内容后变有效
		//			Log.e(TAG, "getCorrectResponse  response == null || response.isEmpty() >> return response;");
		return response;
		//		}
		//
		//		JSONObject target = zuo.biao.apijson.JSONObject.isTableKey(table) == false
		//				? new JSONObject() : getStructure(method, "Response", "model", table);
		//
		//				return MethodStructure.parseResponse(method, table, target, response, new OnParseCallback() {
		//
		//					@Override
		//					protected JSONObject onParseJSONObject(String key, JSONObject tobj, JSONObject robj) throws Exception {
		//						return getCorrectResponse(method, key, robj);
		//					}
		//				});
	}

	/**获取Request或Response内指定JSON结构
	 * @param table
	 * @param key
	 * @param value
	 * @param version
	 * @return
	 * @throws Exception
	 */
	@Override
	public JSONObject getStructure(@NotNull String table, String key, String value, int version) throws Exception  {
		//获取指定的JSON结构 <<<<<<<<<<<<<<
		SQLConfig config = createSQLConfig().setMethod(GET).setTable(table);
		config.setPrepared(false);
		config.setColumn(Arrays.asList("structure"));

		Map<String, Object> where = new HashMap<String, Object>();
		where.put("method", requestMethod.name());
		if (key != null) {
			where.put(key, value);
		}
		if (version > 0) {
			where.put(JSONRequest.KEY_VERSION + "{}", ">=" + version);
		}
		config.setWhere(where);
		config.setOrder(JSONRequest.KEY_VERSION + (version > 0 ? "+" : "-"));
		config.setCount(1);

		SQLExecutor executor = createSQLExecutor();

		//too many connections error: 不try-catch，可以让客户端看到是服务器内部异常
		try {
			JSONObject result = executor.execute(config, false);
			return getJSONObject(result, "structure");//解决返回值套了一层 "structure":{}
		} finally {
			executor.close();
		}
	}



	//	protected SQLConfig itemConfig;
	/**获取单个对象，该对象处于parentObject内
	 * @param parentPath parentObject的路径
	 * @param name parentObject的key
	 * @param request parentObject的value
	 * @param config for array item
	 * @return
	 * @throws Exception 
	 */
	@Override
	public JSONObject onObjectParse(final JSONObject request
			, String parentPath, String name, final SQLConfig arrayConfig, boolean isSubquery) throws Exception {

		if (Log.DEBUG) {
			Log.i(TAG, "\ngetObject:  parentPath = " + parentPath
					+ ";\n name = " + name + "; request = " + JSON.toJSONString(request));
		}
		if (request == null) {// Moment:{}   || request.isEmpty()) {//key-value条件
			return null;
		}

		int type = arrayConfig == null ? 0 : arrayConfig.getType();

		String[] arr = StringUtil.split(parentPath, "/");
		if (arrayConfig == null || arrayConfig.getPosition() == 0) {
			int d = arr == null ? 1 : arr.length + 1;
			if (queryDepth < d) {
				queryDepth = d;
				int maxQueryDepth = getMaxQueryDepth();
				if (queryDepth > maxQueryDepth) {
					throw new IllegalArgumentException(parentPath + "/" + name + ":{} 的深度(或者说层级) 为 " + queryDepth + " 已超限，必须在 1-" + maxQueryDepth + " 内 !");
				}
			}
		}

		ObjectParser op = createObjectParser(request, parentPath, name, arrayConfig, isSubquery).parse();


		JSONObject response = null;
		if (op != null) {//TODO SQL查询结果为空时，functionMap和customMap还有没有意义？
			if (arrayConfig == null) {//Common
				response = op.setSQLConfig().executeSQL().response();
			}
			else {//Array Item Child
				int query = arrayConfig.getQuery();

				//total 这里不能用arrayConfig.getType()，因为在createObjectParser.onChildParse传到onObjectParse时已被改掉
				if (type == SQLConfig.TYPE_ITEM_CHILD_0 && query != JSONRequest.QUERY_TABLE
						&& arrayConfig.getPosition() == 0) {
					JSONObject rp = op.setMethod(RequestMethod.HEAD).setSQLConfig().executeSQL().getSqlReponse();
					if (rp != null) {
						int index = parentPath.lastIndexOf("]/");
						if (index >= 0) {
							int total = rp.getIntValue(JSONResponse.KEY_COUNT);
							putQueryResult(parentPath.substring(0, index) + "]/" + JSONResponse.KEY_TOTAL, total);

							if (total <= arrayConfig.getCount()*arrayConfig.getPage()) {
								query = JSONRequest.QUERY_TOTAL;//数量不够了，不再往后查询
							}
						}
					}

					op.setMethod(requestMethod);
				}

				//Table
				if (query == JSONRequest.QUERY_TOTAL) {
					response = null;//不再往后查询
				} else {
					response = op
							.setSQLConfig(arrayConfig.getCount(), arrayConfig.getPage(), arrayConfig.getPosition())
							.executeSQL()
							.response();
					//					itemConfig = op.getConfig();
				}
			}

			op.recycle();
			op = null;
		}

		return response;
	}

	/**获取对象数组，该对象数组处于parentObject内
	 * @param parentPath parentObject的路径
	 * @param name parentObject的key
	 * @param request parentObject的value
	 * @return 
	 * @throws Exception
	 */
	@Override
	public JSONArray onArrayParse(JSONObject request, String parentPath, String name, boolean isSubquery) throws Exception {
		if (Log.DEBUG) {
			Log.i(TAG, "\n\n\n onArrayParse parentPath = " + parentPath
					+ "; name = " + name + "; request = " + JSON.toJSONString(request));
		}

		//不能允许GETS，否则会被通过"[]":{"@role":"ADMIN"},"Table":{},"tag":"Table"绕过权限并能批量查询
		if (RequestMethod.isGetMethod(requestMethod, false) == false) {
			throw new UnsupportedOperationException("key[]:{}只支持GET方法！不允许传 " + name + ":{} ！");
		}
		if (request == null || request.isEmpty()) {//jsonKey-jsonValue条件
			return null;
		}
		String path = getAbsPath(parentPath, name);


		//不能改变，因为后面可能继续用到，导致1以上都改变 []:{0:{Comment[]:{0:{Comment:{}},1:{...},...}},1:{...},...}
		final String query = request.getString(JSONRequest.KEY_QUERY);
		final Integer count = request.getInteger(JSONRequest.KEY_COUNT); //TODO 如果不想用默认数量可以改成 getIntValue(JSONRequest.KEY_COUNT);
		final int page = request.getIntValue(JSONRequest.KEY_PAGE);
		final Object join = request.get(JSONRequest.KEY_JOIN);

		int query2;
		if (query == null) {
			query2 = JSONRequest.QUERY_TABLE;
		}
		else {
			switch (query) {
			case "0":
			case JSONRequest.QUERY_TABLE_STRING:
				query2 = JSONRequest.QUERY_TABLE;
				break;
			case "1":
			case JSONRequest.QUERY_TOTAL_STRING:
				query2 = JSONRequest.QUERY_TOTAL;
				break;
			case "2":
			case JSONRequest.QUERY_ALL_STRING:
				query2 = JSONRequest.QUERY_ALL;
				break;
			default:
				throw new IllegalArgumentException(path + "/" + JSONRequest.KEY_QUERY + ":value 中 value 的值不合法！必须在 [0,1,2] 或 [TABLE, TOTAL, ALL] 内 !");
			}
		}

		int maxPage = getMaxQueryPage();
		if (page < 0 || page > maxPage) {
			throw new IllegalArgumentException(path + "/" + JSONRequest.KEY_PAGE + ":value 中 value 的值不合法！必须在 0-" + maxPage + " 内 !");
		}

		//不用total限制数量了，只用中断机制，total只在query = 1,2的时候才获取
		int count2 = isSubquery || count != null ? (count == null ? 0 : count) : getDefaultQueryCount();
		int max = isSubquery ? count2 : getMaxQueryCount();

		if (count2 < 0 || count2 > max) {
			throw new IllegalArgumentException(path + "/" + JSONRequest.KEY_COUNT + ":value 中 value 的值不合法！必须在 0-" + max + " 内 !");
		}

		request.remove(JSONRequest.KEY_QUERY);
		request.remove(JSONRequest.KEY_COUNT);
		request.remove(JSONRequest.KEY_PAGE);
		request.remove(JSONRequest.KEY_JOIN);
		Log.d(TAG, "onArrayParse  query = " + query + "; count = " + count + "; page = " + page + "; join = " + join);

		if (request.isEmpty()) {//如果条件成立，说明所有的 parentPath/name:request 中request都无效！！！
			Log.e(TAG, "onArrayParse  request.isEmpty() >> return null;");
			return null;
		}


		int size = count2 == 0 ? max : count2;//count为每页数量，size为第page页实际数量，max(size) = count
		Log.d(TAG, "onArrayParse  size = " + size + "; page = " + page);


		//key[]:{Table:{}}中key equals Table时 提取Table
		int index = name == null ? -1 : name.lastIndexOf("[]");
		String childPath = index <= 0 ? null : Pair.parseEntry(name.substring(0, index), true).getKey(); // Table-key1-key2...

		//判断第一个key，即Table是否存在，如果存在就提取
		String[] childKeys = StringUtil.split(childPath, "-", false);
		if (childKeys == null || childKeys.length <= 0 || request.containsKey(childKeys[0]) == false) {
			childKeys = null;
		}


		//Table<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
		JSONArray response = new JSONArray();
		SQLConfig config = createSQLConfig()
				.setMethod(requestMethod)
				.setCount(size)
				.setPage(page)
				.setQuery(query2)
				.setJoinList(onJoinParse(join, request));

		JSONObject parent;
		//生成size个
		for (int i = 0; i < (isSubquery ? 1 : size); i++) {
			parent = onObjectParse(request, path, "" + i, config.setType(SQLConfig.TYPE_ITEM).setPosition(i), isSubquery);
			if (parent == null || parent.isEmpty()) {
				break;
			}
			//key[]:{Table:{}}中key equals Table时 提取Table
			response.add(getValue(parent, childKeys)); //null有意义
		}
		//Table>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>


		/*
		 * 支持引用取值后的数组
			{
			    "User-id[]": {
			        "User": {
			            "contactIdList<>": 82002
			        }
			    },
			    "Moment-userId[]": {
			        "Moment": {
			            "userId{}@": "User-id[]"
			        }
			    }
			}
		 */
		Object fo = childKeys == null || response.isEmpty() ? null : response.get(0);
		if (fo instanceof Boolean || fo instanceof Number || fo instanceof String) { //[{}] 和 [[]] 都没意义
			putQueryResult(path, response);
		}


		//后面还可能用到，要还原
		request.put(JSONRequest.KEY_QUERY, query);
		request.put(JSONRequest.KEY_COUNT, count);
		request.put(JSONRequest.KEY_PAGE, page);
		request.put(JSONRequest.KEY_JOIN, join);

		if (Log.DEBUG) {
			Log.i(TAG, "onArrayParse  return response = \n" + JSON.toJSONString(response) + "\n>>>>>>>>>>>>>>>\n\n\n");
		}
		return response;
	}

	/**多表同时筛选
	 * @param join "&/User/id@,</User[]/User/id{}@,</[]/Comment/momentId@"
	 * @param request
	 * @return 
	 * @throws Exception 
	 */
	private List<Join> onJoinParse(Object join, JSONObject request) throws Exception {
		JSONObject joinMap = null;

		if (join instanceof JSONObject) {
			joinMap = (JSONObject) join;
		}
		else if (join instanceof String) {
			String[] sArr = request == null || request.isEmpty() ? null : StringUtil.split((String) join);
			if (sArr != null && sArr.length > 0) {
				joinMap = new JSONObject();
				for (int i = 0; i < sArr.length; i++) {
					joinMap.put(sArr[i], new JSONObject());
				}
			}
		}
		else if (join != null){
			throw new UnsupportedDataTypeException(TAG + ".onJoinParse  join 只能是 String 或 JSONObject 类型！");
		}

		Set<Entry<String, Object>> set = joinMap == null ? null : joinMap.entrySet();
		if (set == null || set.isEmpty()) {
			Log.e(TAG, "doJoin  set == null || set.isEmpty() >> return null;");
			return null;
		}



		List<Join> joinList = new ArrayList<>();


		JSONObject tableObj;
		String targetPath;

		JSONObject targetObj;
		String targetTable;
		String targetKey;

		String path;

		//		List<String> onList = new ArrayList<>();
		for (Entry<String, Object> e : set) {//User/id@
			if (e.getValue() instanceof JSONObject == false) {
				throw new IllegalArgumentException(JSONRequest.KEY_JOIN + ":value 中value不合法！"
						+ "必须为 &/Table0/key0,</Table1/key1,... 或 { '&/Table0/key0':{}, '</Table1/key1':{},... } 这种形式！");
			}

			//分割 /Table/key
			path = "" + e.getKey();

			int index = path.indexOf("/");
			if (index < 0) {
				throw new IllegalArgumentException(JSONRequest.KEY_JOIN + ":value 中value不合法！"
						+ "必须为 &/Table0/key0,</Table1/key1,... 或 { '&/Table0/key0':{}, '</Table1/key1':{},... } 这种形式！");
			}
			String joinType = path.substring(0, index); //& | ! < > ( ) <> () *
			//			if (StringUtil.isEmpty(joinType, true)) {
			//				joinType = "|"; // FULL JOIN
			//			}
			path = path.substring(index + 1);

			index = path.indexOf("/");
			String tableKey = index < 0 ? null : path.substring(0, index); //User:owner
			String table = Pair.parseEntry(tableKey, true).getKey(); //User
			String key = StringUtil.isEmpty(table, true) ? null : path.substring(index + 1);//id@
			if (StringUtil.isEmpty(key, true)) {
				throw new IllegalArgumentException(JSONRequest.KEY_JOIN + ":value 中value不合法！"
						+ "必须为 &/Table0/key0,</Table1/key1,... 这种形式！");
			}

			//取出Table对应的JSONObject，及内部引用赋值 key:value
			tableObj = request.getJSONObject(tableKey);
			targetPath = tableObj == null ? null : tableObj.getString(key);
			if (StringUtil.isEmpty(targetPath, true)) {
				throw new IllegalArgumentException("/" + path + ":value 中value必须为引用赋值的路径 '/targetTable/targetKey' ！");
			}

			//取出引用赋值路径targetPath对应的Table和key
			index = targetPath.lastIndexOf("/");
			targetKey = index < 0 ? null : targetPath.substring(index + 1);
			if (StringUtil.isEmpty(targetKey, true)) {
				throw new IllegalArgumentException("/" + path + ":'/targetTable/targetKey' 中targetKey不能为空！");
			}

			targetPath = targetPath.substring(0, index);
			index = targetPath.lastIndexOf("/");
			targetTable = index < 0 ? targetPath : targetPath.substring(index + 1);


			//对引用的JSONObject添加条件
			targetObj = request.getJSONObject(targetTable);
			if (targetObj == null) {
				throw new IllegalArgumentException(targetTable + "." + targetKey
						+ ":'/targetTable/targetKey' 中路径对应的对象不存在！");
			}

			tableObj.put(key, tableObj.remove(key)); //保证和SQLExcecutor缓存的Config里where顺序一致，生成的SQL也就一致

			Join j = new Join();
			j.setPath(path);
			j.setOriginKey(key);
			j.setOriginValue(targetPath);
			j.setJoinType(joinType);
			j.setName(table);
			j.setTargetName(targetTable);
			j.setTargetKey(targetKey);
			j.setKeyAndType(key);
			j.setTable(getJoinObject(table, tableObj, key));
			j.setOutter((JSONObject) e.getValue());

			joinList.add(j);

			//			onList.add(table + "." + key + " = " + targetTable + "." + targetKey); // ON User.id = Moment.userId

		}


		//拼接多个 SQLConfig 的SQL语句，然后执行，再把结果分别缓存(Moment, User等)到 SQLExecutor 的 cacheMap
		//		AbstractSQLConfig config0 = null;
		//		String sql = "SELECT " + config0.getColumnString() + " FROM " + config0.getTable() + " INNER JOIN " + targetTable + " ON "
		//				+ onList.get(0) + config0.getGroupString() + config0.getHavingString() + config0.getOrderString();


		return joinList;
	}



	private static final List<String> JOIN_COPY_KEY_LIST;
	static {//TODO 不全
		JOIN_COPY_KEY_LIST = new ArrayList<String>();
		JOIN_COPY_KEY_LIST.add(JSONRequest.KEY_DATABASE);
		JOIN_COPY_KEY_LIST.add(JSONRequest.KEY_SCHEMA);
		JOIN_COPY_KEY_LIST.add(JSONRequest.KEY_COLUMN);
		JOIN_COPY_KEY_LIST.add(JSONRequest.KEY_COMBINE);
		JOIN_COPY_KEY_LIST.add(JSONRequest.KEY_GROUP);
		JOIN_COPY_KEY_LIST.add(JSONRequest.KEY_HAVING);
		JOIN_COPY_KEY_LIST.add(JSONRequest.KEY_ORDER);
	}

	/**
	 * 取指定json对象的id集合
	 * @param table
	 * @param key
	 * @param obj
	 * @param targetKey 
	 * @return null ? 全部 : 有限的数组
	 */
	private JSONObject getJoinObject(String table, JSONObject obj, String key) {
		if (obj == null || obj.isEmpty()) {
			Log.e(TAG, "getIdList  obj == null || obj.isEmpty() >> return null;");
			return null;
		}
		if (StringUtil.isEmpty(key, true)) {
			Log.e(TAG, "getIdList  StringUtil.isEmpty(key, true) >> return null;");
			return null;
		}

		//取出所有join条件
		JSONObject requestObj = new JSONObject(true);//(JSONObject) obj.clone();//
		Set<String> set = new LinkedHashSet<>(obj.keySet());
		for (String k : set) {
			if (StringUtil.isEmpty(k, true)) {
				continue;
			}

			if (k.startsWith("@")) {
				if (JOIN_COPY_KEY_LIST.contains(k)) {
					requestObj.put(k, obj.get(k)); //保留
				}
			}
			else {
				if (k.endsWith("@")) {
					if (k.equals(key)) {
						continue;
					}
					throw new UnsupportedOperationException(table + "." + k + " 不合法！" + JSONRequest.KEY_JOIN
							+ " 关联的Table中只能有1个 key@:value ！");
				}

				if (k.contains("()") == false) { //不需要远程函数
					//					requestObj.put(k, obj.remove(k)); //remove是为了避免重复查询副表
					requestObj.put(k, obj.get(k)); //remove是为了避免重复查询副表
				}
			}
		}


		return requestObj;
	}

	@Override
	public int getDefaultQueryCount() {
		return DEFAULT_QUERY_COUNT;
	}
	@Override
	public int getMaxQueryPage() {
		return MAX_QUERY_PAGE;
	}
	@Override
	public int getMaxQueryCount() {
		return MAX_QUERY_COUNT;
	}
	@Override
	public int getMaxUpdateCount() {
		return MAX_UPDATE_COUNT;
	}
	@Override
	public int getMaxSQLCount() {
		return MAX_SQL_COUNT;
	}
	@Override
	public int getMaxObjectCount() {
		return MAX_OBJECT_COUNT;
	}
	@Override
	public int getMaxArrayCount() {
		return MAX_ARRAY_COUNT;
	}
	@Override
	public int getMaxQueryDepth() {
		return MAX_QUERY_DEPTH;
	}


	/**根据路径取值
	 * @param parent
	 * @param pathKeys
	 * @return
	 */
	protected static Object getValue(JSONObject parent, String[] pathKeys) {
		if (parent == null || pathKeys == null || pathKeys.length <= 0) {
			Log.w(TAG, "getChild  parent == null || pathKeys == null || pathKeys.length <= 0 >> return parent;");
			return parent;
		}

		//逐层到达child的直接容器JSONObject parent
		final int last = pathKeys.length - 1;
		for (int i = 0; i < last; i++) {//一步一步到达指定位置
			if (parent == null) {//不存在或路径错误(中间的key对应value不是JSONObject)
				break;
			}
			parent = getJSONObject(parent, pathKeys[i]);
		}

		return parent == null ? null : parent.get(pathKeys[last]);
	}


	/**获取被依赖引用的key的路径, 实时替换[] -> []/i
	 * @param parentPath
	 * @param valuePath
	 * @return
	 */
	public static String getValuePath(String parentPath, String valuePath) {
		if (valuePath.startsWith("/")) {
			valuePath = getAbsPath(parentPath, valuePath);
		} else {//处理[] -> []/i
			valuePath = replaceArrayChildPath(parentPath, valuePath);
		}
		return valuePath;
	}

	/**获取绝对路径
	 * @param path
	 * @param name
	 * @return
	 */
	public static String getAbsPath(String path, String name) {
		Log.i(TAG, "getPath  path = " + path + "; name = " + name + " <<<<<<<<<<<<<");
		path = StringUtil.getString(path);
		name = StringUtil.getString(name);
		if (StringUtil.isNotEmpty(path, false)) {
			if (StringUtil.isNotEmpty(name, false)) {
				path += ((name.startsWith("/") ? "" : "/") + name);
			}
		} else {
			path = name;
		}
		if (path.startsWith("/")) {
			path = path.substring(1);
		}
		Log.i(TAG, "getPath  return " + path + " >>>>>>>>>>>>>>>>");
		return path;
	}

	/**替换[] -> []/i
	 * 不能写在getAbsPath里，因为name不一定是依赖路径
	 * @param parentPath
	 * @param valuePath
	 * @return
	 */
	public static String replaceArrayChildPath(String parentPath, String valuePath) {
		String[] ps = StringUtil.split(parentPath, "]/");//"[]/");
		if (ps != null && ps.length > 1) {
			String[] vs = StringUtil.split(valuePath, "]/");

			if (vs != null && vs.length > 0) {
				String pos;
				for (int i = 0; i < ps.length - 1; i++) {
					if (ps[i] == null || ps[i].equals(vs[i]) == false) {//允许""？
						break;
					}

					pos = ps[i+1].contains("/") == false ? ps[i+1]
							: ps[i+1].substring(0, ps[i+1].indexOf("/"));
					if (
							//StringUtil.isNumer(pos) && 
							vs[i+1].startsWith(pos + "/") == false) {
						vs[i+1] = pos + "/" + vs[i+1];
					}
				}
				return StringUtil.getString(vs, "]/");
			}
		}
		return valuePath;
	}

	//依赖引用关系 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

	/**将已获取完成的object的内容替换requestObject里对应的值
	 * @param path object的路径
	 * @param result 需要被关联的object
	 */
	@Override
	public synchronized void putQueryResult(String path, Object result) {
		Log.i(TAG, "\n putQueryResult  valuePath = " + path + "; result = " + result + "\n <<<<<<<<<<<<<<<<<<<<<<<");
		//		if (queryResultMap.containsKey(valuePath)) {//只保存被关联的value
		Log.d(TAG, "putQueryResult  queryResultMap.containsKey(valuePath) >> queryResultMap.put(path, result);");
		queryResultMap.put(path, result);
		//		}
	}
	/**根据路径获取值
	 * @param valuePath
	 * @return parent == null ? valuePath : parent.get(keys[keys.length - 1])
	 */
	@Override
	public Object getValueByPath(String valuePath) {
		Log.i(TAG, "<<<<<<<<<<<<<<< \n getValueByPath  valuePath = " + valuePath + "\n <<<<<<<<<<<<<<<<<<");
		if (StringUtil.isEmpty(valuePath, true)) {
			Log.e(TAG, "getValueByPath  StringUtil.isNotEmpty(valuePath, true) == false >> return null;");
			return null;
		}
		Object target = queryResultMap.get(valuePath);
		if (target != null) {
			return target;
		}

		//取出key被valuePath包含的result，再从里面获取key对应的value
		Set<String> set = queryResultMap.keySet();
		JSONObject parent = null;
		String[] keys = null;
		for (String path : set) {
			if (valuePath.startsWith(path + "/")) {
				try {
					parent = (JSONObject) queryResultMap.get(path);
				} catch (Exception e) {
					Log.e(TAG, "getValueByPath  try { parent = (JSONObject) queryResultMap.get(path); } catch { "
							+ "\n parent not instanceof JSONObject!");
					parent = null;
				}
				if (parent != null) {
					keys = StringUtil.splitPath(valuePath.substring(path.length()));
				}
				break;
			}
		}

		//逐层到达targetKey的直接容器JSONObject parent
		if (keys != null && keys.length > 1) {
			for (int i = 0; i < keys.length - 1; i++) {//一步一步到达指定位置parentPath
				if (parent == null) {//不存在或路径错误(中间的key对应value不是JSONObject)
					break;
				}
				parent = getJSONObject(parent, keys[i]);
			}
		}

		if (parent != null) {
			Log.i(TAG, "getValueByPath >> get from queryResultMap >> return  parent.get(keys[keys.length - 1]);");
			target = parent.get(keys[keys.length - 1]); //值为null应该报错NotExistExeption，一般都是id关联，不可为null，否则可能绕过安全机制
			if (target != null) {
				Log.i(TAG, "getValueByPath >> getValue >> return target = " + target);
				return target;
			}
		}


		//从requestObject中取值
		target = getValue(requestObject, StringUtil.splitPath(valuePath));
		if (target != null) {
			Log.i(TAG, "getValueByPath >> getValue >> return target = " + target);
			return target;
		}

		Log.i(TAG, "getValueByPath  return valuePath;");
		return valuePath;
	}

	//依赖引用关系 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>




	public static JSONObject getJSONObject(JSONObject object, String key) {
		try {
			return object.getJSONObject(key);
		} catch (Exception e) {
			Log.i(TAG, "getJSONObject  try { return object.getJSONObject(key);"
					+ " } catch (Exception e) { \n"  + e.getMessage());
		}
		return null;
	}


	public static final String KEY_CONFIG = "config";

	/**执行 SQL 并返回 JSONObject
	 * @param config
	 * @return
	 * @throws Exception
	 */
	@Override
	public JSONObject executeSQL(SQLConfig config, boolean isSubquery) throws Exception {
		if (config == null) {
			Log.d(TAG, "executeSQL  config == null >> return null;");
			return null;
		}

		if (isSubquery) {
			JSONObject sqlObj = new JSONObject(true);
			sqlObj.put(KEY_CONFIG, config);
			return sqlObj;//容易丢失信息 JSON.parseObject(config);
		}

		try {
			boolean explain = config.isExplain();
			JSONObject result;
			if (explain) { //如果先执行 explain，则 execute 会死循环，所以只能先执行非 explain
				config.setExplain(false); //对下面 config.getSQL(false); 生效
				JSONObject res = sqlExecutor.execute(config, false);

				config.setExplain(explain);
				JSONObject explainResult = config.isMain() && config.getPosition() != 0 ? null : sqlExecutor.execute(config, false);

				if (explainResult == null) {
					result = res;
				}
				else {
					result = new JSONObject(true);
					result.put(KEY_EXPLAIN, explainResult);
					result.putAll(res);
				}
			}
			else {
				result = sqlExecutor.execute(config, false);
			}

			return parseCorrectResponse(config.getTable(), result);
		}
		catch (Exception e) {
			if (Log.DEBUG == false && e instanceof SQLException) {
				throw new SQLException("数据库驱动执行异常SQLException，非 Log.DEBUG 模式下不显示详情，避免泄漏真实模式名、表名等隐私信息", e);
			}
			throw e;
		}
		finally {
			if (config.getPosition() == 0) {
				int maxSQLCount = getMaxSQLCount();
				int sqlCount = sqlExecutor.getExecutedSQLCount();
				Log.d(TAG, "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< \n\n\n 已执行 " + sqlCount + "/" + maxSQLCount + " 条 SQL \n\n\n >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
				if (sqlCount > maxSQLCount) {
					throw new IllegalArgumentException("截至 " + config.getTable() + " 已执行 " + sqlCount + " 条 SQL，数量已超限，必须在 0-" + maxSQLCount + " 内 !");
				}
			}
		}
	}



}
