/* 
 * INTEL CONFIDENTIAL
 * Copyright © 2011 Intel 
 * Corporation All Rights Reserved.
 * 
 * The source code contained or described herein and all documents related to
 * the source code ("Material") are owned by Intel Corporation or its suppliers
 * or licensors. Title to the Material remains with Intel Corporation or its
 * suppliers and licensors. The Material contains trade secrets and proprietary
 * and confidential information of Intel or its suppliers and licensors. The
 * Material is protected by worldwide copyright and trade secret laws and
 * treaty provisions. No part of the Material may be used, copied, reproduced,
 * modified, published, uploaded, posted, transmitted, distributed, or
 * disclosed in any way without Intel’s prior express written permission.
 * 
 * No license under any patent, copyright, trade secret or other intellectual
 * property right is granted to or conferred upon you by disclosure or delivery
 * of the Materials, either expressly, by implication, inducement, estoppel or
 * otherwise. Any license under such intellectual property rights must be
 * express and approved by Intel in writing.
 * 
 * CREATED: 2011-06-01
 * UPDATED: 2011-07-27
 */
#include <iostream>
#include <string>
#include <cstring>
#include <stdlib.h>
#include "RequestMessage.h"
#include "AnswerMessage.h"
#include "ConnectionSocket.h"
#include "NaiveTokenizer.h"

using namespace std;

class CRequestMessageGenerator
{
private:
    istream& _input; // File to read the commands from

public:
    CRequestMessageGenerator(istream& input) : _input(input) {}

    enum EStatus {
        OK,
        STOP,
        EMPTY_LINE,
        ERROR
    };

    EStatus next(CRequestMessage& requestMessage)
    {
        string sLine;
        char* pcLine;
        char* pcLine_backup; // pcLine will be modified by NaiveTokenizer
                             // so we need to keep track of its original value
        char* pcToken;

        // Read a single line from the input file
        getline(_input, sLine);
        if (_input.eof() && (_input.gcount() == 0)) {
            return STOP; // No more commands
        }
        if (_input.fail()) {
            return ERROR; // Error while reading file
        }

        pcLine = strdup(sLine.c_str());
        pcLine_backup = pcLine;
        if (!pcLine) {
            return ERROR;
        }

        // Set the first word as the command
        pcToken = NaiveTokenizer::getNextToken(&pcLine);
        if (!pcToken) {
            free(pcLine_backup);
            return EMPTY_LINE;
        }
        requestMessage.setCommand(pcToken);

        while ((pcToken = NaiveTokenizer::getNextToken(&pcLine)) != NULL) {

            // Add each word as arguments to the command
            requestMessage.addArgument(pcToken);
        }

        free(pcLine_backup);

        return OK;
    }
};

bool sendAndDisplayCommand(CConnectionSocket &connectionSocket, CRequestMessage &requestMessage)
{
    if (!requestMessage.serialize(&connectionSocket, true)) {

        cerr << "Unable to send command to target" << endl;
        return false;
    }

    ///// Get answer
    CAnswerMessage answerMessage;
    if (!answerMessage.serialize(&connectionSocket, false)) {

        cerr << "No answer received from target" << endl;
        return false;
    }

    // Success?
    if (!answerMessage.success()) {

        // Display error answer
        cerr << answerMessage.getAnswer() << endl;
        return false;
    }

    // Display success answer
    cout << answerMessage.getAnswer() << endl;

    return true;
}

// hostname port command [argument[s]]
// or
// hostname port < commands
int main(int argc, char *argv[])
{
    bool bFromStdin = false; // Read commands from stdin instead of arguments

    // Enough args?
    if (argc < 3) {

        cerr << "Missing arguments" << endl;
        cerr << "Usage: " << endl;
        cerr << "Send a single command:" << endl;
        cerr << "\t" << argv[0] << " hostname port command [argument[s]]" << endl;
        cerr << "Send several commands, read from stdin:" << endl;
        cerr << "\t" << argv[0] << " hostname port" << endl;

        return 1;
    } else if (argc < 4) {
        bFromStdin = true;
    }
    // Get port number
    uint16_t uiPort = (uint16_t)strtoul(argv[2], NULL, 0);

    // Connect to target
    CConnectionSocket connectionSocket;

    // Set timeout
    connectionSocket.setTimeout(5000);

    string strError;
    // Connect
    if (!connectionSocket.connect(argv[1], uiPort, strError)) {

        cerr << strError << endl;

        return 1;
    }

    if (bFromStdin) {

        CRequestMessageGenerator generator(cin);
        CRequestMessage requestMessage;
        CRequestMessageGenerator::EStatus status;

        while (true) {
            status = generator.next(requestMessage);

            switch (status) {
            case CRequestMessageGenerator::OK:
                if (!sendAndDisplayCommand(connectionSocket, requestMessage)) {
                    return 1;
                }
                break;
            case CRequestMessageGenerator::STOP:
                return 0;
            case CRequestMessageGenerator::ERROR:
                cerr << "Error while reading the input" << endl;
                return 1;
            case CRequestMessageGenerator::EMPTY_LINE:
                continue;
            }
        }
    } else {
        // Create command message
        CRequestMessage requestMessage(argv[3]);

        // Add arguments
        uint32_t uiArg;
        for (uiArg = 4; uiArg < (uint32_t)argc; uiArg++) {

            requestMessage.addArgument(argv[uiArg]);
        }

        if (!sendAndDisplayCommand(connectionSocket, requestMessage)) {
            return 1;
        }
    }

    // Program status
    return 0;
}