/*
 *
 *  Copyright 2006 The Apache Software Foundation or its licensors, as applicable.
 *
 *  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.
 */


#include "Calculator.h"
#include "osoa/sca/sca.h"
using namespace osoa::sca;
using namespace std;
#include "tuscany/sca/core/TuscanyRuntime.h"
using namespace tuscany::sca;

#include <iostream>
#include <stdlib.h>
using namespace std;


void usage();
bool IsNumber(const char *p);

int main(int argc, char* argv[])
{
    const char *operation;
    float arg1 = 0;
    float arg2 = 0;
	
    if (argc == 4)
    {
        operation = argv[1];
		
        if (!IsNumber(argv[2]))
        {
            cout << "Calc.exe: Argument 1 is not a number" << endl;
			usage();
        }
        else
        {
            arg1 = atof(argv[2]);
        }

        if (!IsNumber(argv[3]))
        {
            cout << "Calc.exe: Argument 2 is not a number" << endl;
			usage();
        }
        else
        {
            arg2 = atof(argv[3]);
        }
    }
    else
    {
        usage();
    }

    try
    {
        // Set the default module environment variable: <subsystem>/<moduleName>
        string systemRoot = getenv("TUSCANY_SCACPP");
        if (systemRoot  == "")
        {
            cout << "TUSCANY_SCACPP environment variable not set" <<endl;
            return -1;
        }
        systemRoot += "/../samples/Calculator/deploy";
        
        char *defaultModule = "CalculatorSubsystem/CalculatorService";
        
//        TuscanyRuntime rt;
//        rt.setSystemRoot(systemRoot);
//        rt.setDefaultModuleComponent(defaultModule);
//        rt.start();

        // Locate a service
		ModuleContext myContext = ModuleContext::getCurrent();
		Calculator *calcService = (Calculator*) myContext.locateService("CalculatorServiceComponent");
		if (calcService == 0)
		{
			cout << "Calc.exe: Unable to find Calculator service" << endl;
		}
		else
		{
			try
			{
                float result = 0;
                if (strcmp(operation, "add") == 0)
                {
                    result = calcService->add(arg1, arg2);
                    cout << "Calculator: add(" << arg1 << "," << arg2 << ") = " << result << endl;
                }
                else
                if (strcmp(operation, "sub") == 0)
                {
                    result = calcService->sub(arg1, arg2);
                    cout << "Calculator: sub(" << arg1 << "," << arg2 << ") = " << result << endl;
                }
                else
                if (strcmp(operation, "mul") == 0)
                {
                    result = calcService->mul(arg1, arg2);
                    cout << "Calculator: mul(" << arg1 << "," << arg2 << ") = " << result << endl;
                }
                else
                if (strcmp(operation, "div") == 0)
                {
                    result = calcService->div(arg1, arg2);
                    cout << "Calculator: div(" << arg1 << "," << arg2 << ") = " << result << endl;
                }
				else
			    {
			        cout << "Calculator: Unrecognized operation: " << operation << endl;
				}
			}
			catch (char* x)
			{
				cout << "Calc.exe: exception caught: " << x << endl;
			}
		}
		
	}
	catch (ServiceRuntimeException& ex)
	{
		cout << ex << endl;
	}
	return 0;
}

void usage()
{
   cout << "Usage: calc add|sub|mul|div arg1 arg2" << endl;
   exit(1);
}

bool IsNumber (const char *p)
{
    int len = strlen(p);
    int pointcount = 0;

    if (!isdigit (p[0]) && p[0] != '-' && p[0] != '+')
    {
        return false;
    }
    for (int i = 1; i < len; i++)
    {
	   if (!isdigit (p[i]))
       {
           if (p[i] == '.')
           {
               if (pointcount > 0) return false;
               pointcount++;
           }
           else
           {
                return false;
           }
       }
    }
    return true;
}