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/*****************************************************************************

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 *

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 * $Id$

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 *

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 ****************************************************************************/

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#include <iostream>

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#include <iomanip>

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using namespace std;

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#include "CommandDownload.h"

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#include "byteorder.h"

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/*****************************************************************************/

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CommandDownload::CommandDownload():

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    SdoCommand("download", "Write an Sdo entry to a slave.")

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{

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}

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/*****************************************************************************/

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string CommandDownload::helpString() const

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{

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    stringstream str;

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    str << getName() << " [OPTIONS] <INDEX> <SUBINDEX> <VALUE>" << endl

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    	<< endl

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    	<< getBriefDescription() << endl

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        << endl

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        << "This command requires a single slave to be selected." << endl

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    	<< endl

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    	<< "The data type of the Sdo entry is taken from the Sdo" << endl

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		<< "dictionary by default. It can be overridden with the" << endl

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		<< "--type option. If the slave does not support the Sdo" << endl

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		<< "information service or the Sdo is not in the dictionary," << endl

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		<< "the --type option is mandatory." << endl

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    	<< endl

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    	<< "These are the valid Sdo entry data types:" << endl

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    	<< "  int8, int16, int32, uint8, uint16, uint32, string." << endl

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    	<< endl

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    	<< "Arguments:" << endl

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    	<< "  INDEX    is the Sdo index and must be an unsigned" << endl

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		<< "           16 bit number." << endl

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    	<< "  SUBINDEX is the Sdo entry subindex and must be an" << endl

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		<< "           unsigned 8 bit number." << endl

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    	<< "  VALUE    is the value to download and must correspond" << endl

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		<< "           to the Sdo entry datatype (see above)." << endl

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    	<< endl

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    	<< "Command-specific options:" << endl

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        << "  --alias    -a <alias>" << endl

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        << "  --position -p <pos>    Slave selection. See the help of" << endl

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        << "                         the 'slaves' command." << endl

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    	<< "  --type     -t <type>   Sdo entry data type (see above)." << endl

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    	<< endl

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		<< numericInfo();

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	return str.str();

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}

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/****************************************************************************/

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void CommandDownload::execute(MasterDevice &m, const StringVector &args)

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{

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    stringstream strIndex, strSubIndex, strValue, err;

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    ec_ioctl_slave_sdo_download_t data;

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    unsigned int number;

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    const DataType *dataType = NULL;

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    SlaveList slaves;

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    if (args.size() != 3) {

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        err << "'" << getName() << "' takes 3 arguments!";

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        throwInvalidUsageException(err);

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    }

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    strIndex << args[0];

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    strIndex

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        >> resetiosflags(ios::basefield) // guess base from prefix

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        >> data.sdo_index;

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    if (strIndex.fail()) {

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        err << "Invalid Sdo index '" << args[0] << "'!";

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        throwInvalidUsageException(err);

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    }

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    strSubIndex << args[1];

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    strSubIndex

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        >> resetiosflags(ios::basefield) // guess base from prefix

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        >> number;

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    if (strSubIndex.fail() || number > 0xff) {

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        err << "Invalid Sdo subindex '" << args[1] << "'!";

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        throwInvalidUsageException(err);

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    }

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    data.sdo_entry_subindex = number;

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    m.open(MasterDevice::ReadWrite);

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    slaves = selectedSlaves(m);

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    if (slaves.size() != 1) {

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        throwSingleSlaveRequired(slaves.size());

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    }

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    data.slave_position = slaves.front().position;

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    if (!getDataType().empty()) { // data type specified

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        if (!(dataType = findDataType(getDataType()))) {

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            err << "Invalid data type '" << getDataType() << "'!";

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            throwInvalidUsageException(err);

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        }

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    } else { // no data type specified: fetch from dictionary

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        ec_ioctl_slave_sdo_entry_t entry;

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        try {

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            m.getSdoEntry(&entry, data.slave_position,

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                    data.sdo_index, data.sdo_entry_subindex);

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        } catch (MasterDeviceException &e) {

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            err << "Failed to determine Sdo entry data type. "

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                << "Please specify --type.";

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            throwCommandException(err);

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        }

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        if (!(dataType = findDataType(entry.data_type))) {

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            err << "Pdo entry has unknown data type 0x"

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                << hex << setfill('0') << setw(4) << entry.data_type << "!"

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                << " Please specify --type.";

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            throwCommandException(err);

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        }

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    }

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    if (dataType->byteSize) {

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        data.data_size = dataType->byteSize;

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    } else {

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        data.data_size = DefaultBufferSize;

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    }

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    data.data = new uint8_t[data.data_size + 1];

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    strValue << args[2];

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    strValue >> resetiosflags(ios::basefield); // guess base from prefix

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    strValue.exceptions(ios::failbit);

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    try {

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        switch (dataType->coeCode) {

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            case 0x0002: // int8

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                {

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                    int16_t val; // uint8_t is interpreted as char

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                    strValue >> val;

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                    if (val > 127 || val < -128)

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                        throw ios::failure("Value out of range");

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                    *data.data = val;

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                    break;

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                }

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            case 0x0003: // int16

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                {

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                    int16_t val;

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                    strValue >> val;

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                    *(int16_t *) data.data = cputole16(val);

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                    break;

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                }

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            case 0x0004: // int32

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                {

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                    int32_t val;

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                    strValue >> val;

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                    *(int32_t *) data.data = cputole32(val);

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                    break;

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                }

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            case 0x0005: // uint8

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                {

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                    uint16_t val; // uint8_t is interpreted as char

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                    strValue >> val;

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                    if (val > 0xff)

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                        throw ios::failure("Value out of range");

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                    *data.data = val;

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                    break;

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                }

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            case 0x0006: // uint16

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                {

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                    uint16_t val;

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                    strValue >> val;

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                    *(uint16_t *) data.data = cputole16(val);

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                    break;

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                }

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            case 0x0007: // uint32

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                {

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                    uint32_t val;

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                    strValue >> val;

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                    *(uint32_t *) data.data = cputole32(val);

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                    break;

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                }

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            case 0x0009: // string

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                if (strValue.str().size() >= data.data_size) {

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                    err << "String too large";

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                    throwCommandException(err);

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                }

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                data.data_size = strValue.str().size();

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                strValue >> (char *) data.data;

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                break;

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            default:

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                delete [] data.data;

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                err << "Unknown data type 0x" << hex << dataType->coeCode;

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                throwCommandException(err);

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        }

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    } catch (ios::failure &e) {

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        delete [] data.data;

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        err << "Invalid value argument '" << args[2]

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            << "' for type '" << dataType->name << "'!";

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        throwInvalidUsageException(err);

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    }

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	try {

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        m.sdoDownload(&data);

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	} catch (MasterDeviceSdoAbortException &e) {

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        delete [] data.data;

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        err << "Sdo transfer aborted with code 0x"

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            << setfill('0') << hex << setw(8) << e.abortCode

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            << ": " << abortText(e.abortCode);

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        throwCommandException(err);

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	} catch(MasterDeviceException &e) {

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        delete [] data.data;

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        throw e;

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    }

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    delete [] data.data;

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}

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/*****************************************************************************/