/*
 ***************************************************************************************
 *  Copyright (C) 2006 EsperTech, Inc. All rights reserved.                            *
 *  http://www.espertech.com/esper                                                     *
 *  http://www.espertech.com                                                           *
 *  ---------------------------------------------------------------------------------- *
 *  The software in this package is published under the terms of the GPL license       *
 *  a copy of which has been included with this distribution in the license.txt file.  *
 ***************************************************************************************
 */
package com.espertech.esper.epl.methodbase;

import java.io.StringWriter;

public class DotMethodFP {

    private final DotMethodFPInputEnum input;
    private final DotMethodFPParam[] parameters;

    public DotMethodFP(DotMethodFPInputEnum input, DotMethodFPParam... parameters) {
        this.input = input;
        this.parameters = parameters;
    }

    public DotMethodFPInputEnum getInput() {
        return input;
    }

    public DotMethodFPParam[] getParameters() {
        return parameters;
    }

    public String toStringFootprint(boolean isLambdaApplies) {
        if (parameters.length == 0) {
            return "no parameters";
        }
        StringWriter buf = new StringWriter();
        String delimiter = "";
        for (DotMethodFPParam param : parameters) {
            buf.append(delimiter);

            if (isLambdaApplies) {
                if (param.getLambdaParamNum() == 0) {
                    buf.append("an (non-lambda)");
                } else if (param.getLambdaParamNum() == 1) {
                    buf.append("a lambda");
                } else {
                    buf.append("a " + param.getLambdaParamNum() + "-parameter lambda");
                }
            } else {
                buf.append("an");
            }
            buf.append(" expression");
            buf.append(" providing ");
            buf.append(param.getDescription());
            delimiter = " and ";
        }
        return buf.toString();
    }

    public static String toStringProvided(DotMethodFPProvided provided, boolean isLambdaApplies) {
        if (provided.getParameters().length == 0) {
            return "no parameters";
        }
        StringWriter buf = new StringWriter();
        String delimiter = "";

        if (!isLambdaApplies) {
            buf.append(Integer.toString(provided.getParameters().length));
            buf.append(" expressions");
        } else {

            for (DotMethodFPProvidedParam param : provided.getParameters()) {
                buf.append(delimiter);

                if (param.getLambdaParamNum() == 0) {
                    buf.append("an (non-lambda)");
                } else if (param.getLambdaParamNum() == 1) {
                    buf.append("a lambda");
                } else {
                    buf.append("a " + param.getLambdaParamNum() + "-parameter lambda");
                }
                buf.append(" expression");
                delimiter = " and ";
            }
        }

        return buf.toString();
    }

}