/*
 * Copyright 2019 WeBank
 *
 * 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.webank.wedatasphere.linkis.cs.condition.construction;

import com.webank.wedatasphere.linkis.cs.common.entity.enumeration.ContextScope;
import com.webank.wedatasphere.linkis.cs.common.entity.enumeration.ContextType;
import com.webank.wedatasphere.linkis.cs.condition.Condition;
import com.webank.wedatasphere.linkis.cs.condition.impl.ContainsCondition;
import com.webank.wedatasphere.linkis.cs.condition.impl.ContextScopeCondition;
import com.webank.wedatasphere.linkis.cs.condition.impl.ContextTypeCondition;
import com.webank.wedatasphere.linkis.cs.condition.impl.RegexCondition;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang.StringUtils;

import java.util.Collection;

public class ConditionBuilderImpl implements ConditionBuilder{

    Collection<ContextType> contextTypes;
    Collection<ContextScope> contextScopes;
    String regex;
    String containsValue;

    @Override
    public ConditionBuilder contextTypes(Collection<ContextType> contextTypes) {
        this.contextTypes = contextTypes;
        return this;
    }

    @Override
    public ConditionBuilder contextScopes(Collection<ContextScope> contextScopes) {
        this.contextScopes = contextScopes;
        return this;
    }

    @Override
    public ConditionBuilder regex(String regex) {
        this.regex = regex;
        return this;
    }

    @Override
    public ConditionBuilder contains(String value) {
        this.containsValue = value;
        return this;
    }

    @Override
    public Condition build() {
        Condition condition = null;
        if(CollectionUtils.isNotEmpty(contextTypes)){
            for(ContextType contextType : contextTypes){
                Condition subCondition = new ContextTypeCondition(contextType);
                condition = combineCondition(condition, subCondition, true);
            }
        }
        Condition conditionContextScope = null;
        if(CollectionUtils.isNotEmpty(contextScopes)){
            for(ContextScope contextScope : contextScopes){
                Condition subCondition = new ContextScopeCondition(contextScope);
                conditionContextScope = combineCondition(conditionContextScope, subCondition, true);
            }
            condition = combineCondition(condition, conditionContextScope, false);
        }

        if(StringUtils.isNotBlank(regex)){
            Condition subCondition = new RegexCondition(regex);
            condition = combineCondition(condition, subCondition, false);
        }
        if(StringUtils.isNotBlank(containsValue)){
            Condition subCondition = new ContainsCondition(containsValue);
            condition = combineCondition(condition, subCondition, false);
        }
        return condition;
    }

    private Condition combineCondition(Condition condition, Condition subCondition, boolean or) {
        if(condition == null){
            condition = subCondition;
        } else if (or){
            condition = condition.or(subCondition);
        } else {
            condition = condition.and(subCondition);
        }
        return condition;
    }
}
