#include <iostream>
#include <fstream>
#include <stdexcept>
#include <string>
#include <vector>
#include <sstream>
#include <memory>
#include <cstdio>
#include <deviceManager/deviceManager.h>
#include "deviceSpecp.hh"
#include "deviceSpecl.hh"

std::string DeviceManager::readDeviceFile(const std::string& filename)
{
    std::ifstream file(filename);
    if (!file.is_open()) {
        throw std::runtime_error(
            std::string(__func__) + ": Couldn't open deviceSpec file: "
            + filename);
    }

    std::string content(
        (std::istreambuf_iterator<char>(file)),
        std::istreambuf_iterator<char>());

    return content;
}

void DeviceManager::collateAllDeviceSpecs(void)
{
    OptionParser &options = OptionParser::getOptions();
    allDeviceSpecs = options.deviceSpecs;

    for (const auto& file : options.deviceSpecFiles)
    {
        std::string fileContent = readDeviceFile(file);
        if (!allDeviceSpecs.empty()) {
            allDeviceSpecs += "||";
        }
        allDeviceSpecs += fileContent;
    }
}

void DeviceManager::parseAllDeviceSpecs(void)
{
    std::unique_ptr<FILE, decltype(&fclose)> input(
        fmemopen((void*)allDeviceSpecs.c_str(),
        allDeviceSpecs.size(), "r"),
        &fclose);

    if (!input) {
        throw std::runtime_error(
            std::string(__func__) + ": Failed to fmemopen() a FILE* for "
            "parsing device specs");
    }

    deviceSpeclin = input.get();
    if (deviceSpecpparse()) {
        throw std::runtime_error(
            std::string(__func__) + ": Failed to parse device specs. "
            "Check specs for errors");
    }
}