#include "posprinter.h"

#include <exception>
#include <iostream>
#include <string>

PosPrinter::PosPrinter() : PosPrinter(std::pair<int, int>{0x0456, 0x0808}) {}

PosPrinter::PosPrinter(std::pair<int, int> vendorModelId)
{
    int retValue;

    retValue = libusb_init(&contextPtr_);
    if (retValue < 0) {
        throw std::runtime_error("Init error");
    }

    // libusb_set_debug(contextPtr_, 3); // set verbosity level to 3, as suggested in the
    // documentation

    devicePtr_ =
        libusb_open_device_with_vid_pid(contextPtr_, vendorModelId.first,
                                        vendorModelId.second); // these are vendorID and productID
    if (devicePtr_ == NULL) {
        throw std::runtime_error("Cannot open printer device");
    }

    // ...
}

PosPrinter::~PosPrinter()
{
    int retValue;
    retValue = libusb_release_interface(devicePtr_, 0); // release the claimed interface
    if (retValue != 0) {
        std::cout << "Cannot Release Interface" << std::endl;
    } else {
        std::cout << "Released Interface" << std::endl;
    }

    libusb_close(devicePtr_); // close the device we opened
    libusb_exit(contextPtr_); // close the session

    delete instance_;
}

void PosPrinter::initialize(std::pair<int, int> vendorModelId)
{
    if (!instance_) {
        instance_ = new PosPrinter(vendorModelId);
    }
}

PosPrinter* PosPrinter::getInstance() { return instance_; }