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/*
 * Copyright © 2017 camunda services GmbH ([email protected])
 *
 * 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 io.zeebe.model.bpmn.builder;

import io.zeebe.model.bpmn.impl.instance.*;

public class BpmnSequenceFlowBuilder
{
    private final BpmnBuilder builder;
    private final SequenceFlowImpl sequenceFlow;
    private final FlowNodeImpl sourceNode;

    public BpmnSequenceFlowBuilder(BpmnBuilder builder, SequenceFlowImpl sequenceFlow, FlowNodeImpl sourceNode)
    {
        this.builder = builder;
        this.sequenceFlow = sequenceFlow;
        this.sourceNode = sourceNode;
    }

    public BpmnBuilder done()
    {
        return builder;
    }

    public BpmnSequenceFlowBuilder condition(String condition)
    {
        final ConditionExpressionImpl conditionExpression = new ConditionExpressionImpl();
        conditionExpression.setText(condition);

        sequenceFlow.setConditionExpression(conditionExpression);

        return this;
    }

    public BpmnSequenceFlowBuilder defaultFlow()
    {
        if (sourceNode instanceof ExclusiveGatewayImpl)
        {
            final ExclusiveGatewayImpl exclusiveGateway = (ExclusiveGatewayImpl) sourceNode;
            exclusiveGateway.setDefaultFlow(sequenceFlow);
        }
        else
        {
            throw new IllegalArgumentException("Only an exclusive gateway can have a default flow.");
        }

        return this;
    }

}