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/*
 *    Copyright 2017-2022 the original author or authors.
 *
 *    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 com.alilitech.mybatis.jpa.definition;

import org.springframework.core.GenericTypeResolver;

import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.lang.reflect.TypeVariable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;


/**
 * 用于生成关联查询的mapping，一个语句可能会有多个mapping
 *
 * @author Zhou Xiaoxiang
 * @since 1.0
 */
public class MapperDefinition {

    private Class mapper;

    private String resource;

    private String resource1;

    private String namespace;

    private GenericType genericType;

    private List methodDefinitions = new ArrayList<>();

    /**
     * 所有的关联定义，不管有没有包含，与方法无关
     */
    private final List joinStatementDefinitions = new ArrayList<>();

    public MapperDefinition(Class mapper) {
        this.resource = mapper.getName().replace(".", "/") + ".java (best guess)";
        this.resource1 = mapper.toString();
        this.namespace = mapper.getName();
        this.genericType = genericType(mapper);

        for (Method method : mapper.getMethods()) {
            MethodDefinition methodDefinition = new MethodDefinition(this, method);
            methodDefinitions.add(methodDefinition);
        }
    }

    public Class getMapper() {
        return mapper;
    }

    public void setMapper(Class mapper) {
        this.mapper = mapper;
    }

    public String getResource() {
        return resource;
    }

    public void setResource(String resource) {
        this.resource = resource;
    }

    public String getResource1() {
        return resource1;
    }

    public void setResource1(String resource1) {
        this.resource1 = resource1;
    }

    public String getNamespace() {
        return namespace;
    }

    public void setNamespace(String namespace) {
        this.namespace = namespace;
    }

    public GenericType getGenericType() {
        return genericType;
    }

    public void setGenericType(GenericType genericType) {
        this.genericType = genericType;
    }

    public List getMethodDefinitions() {
        return methodDefinitions;
    }

    public void setMethodDefinitions(List methodDefinitions) {
        this.methodDefinitions = methodDefinitions;
    }

    public void addJoinStatementDefinition(JoinStatementDefinition joinStatementDefinition) {
        this.joinStatementDefinitions.add(joinStatementDefinition);
    }

    public List getJoinStatementDefinitions() {
        return joinStatementDefinitions;
    }

    @SuppressWarnings("rawtypes")
    private GenericType genericType(Class mapper) {
        Map map = GenericTypeResolver.getTypeVariableMap(mapper);

        GenericType genericTypeTemp = new GenericType(mapper);

        map.forEach((typeVariable, type) -> {
            if(typeVariable.getName().equals("T")) {
                genericTypeTemp.setDomainType(type);
            }
            if(typeVariable.getName().equals("ID")) {
                genericTypeTemp.setIdType(type);
            }
        });

        return genericTypeTemp;
    }
}