/*
 * Copyright (C) 2014 Cloudius Systems, Ltd.
 */

#include "app-template.hh"
#include "core/reactor.hh"
#include "core/scollectd.hh"
#include "core/print.hh"
#include <boost/program_options.hpp>
#include <fstream>
#include <cstdlib>

namespace bpo = boost::program_options;

app_template::app_template()
        : _opts("App options") {
    _opts.add_options()
            ("help", "show help message")
            ;
    _opts.add(reactor::get_options_description());
    _opts.add(smp::get_options_description());
    _opts.add(scollectd::get_options_description());
}

boost::program_options::options_description_easy_init
app_template::add_options() {
    return _opts.add_options();
}

bpo::variables_map&
app_template::configuration() {
    return *_configuration;
}

int
app_template::run(int ac, char ** av, std::function<void ()>&& func) {
#ifdef DEBUG
    print("WARNING: debug mode. Not for benchmarking or production\n");
#endif
    bpo::variables_map configuration;
    bpo::store(bpo::command_line_parser(ac, av).options(_opts).run(), configuration);
    auto home = std::getenv("HOME");
    if (home) {
        std::ifstream ifs(std::string(home) + "/.config/seastar/seastar.conf");
        if (ifs) {
            bpo::store(bpo::parse_config_file(ifs, _opts), configuration);
        }
    }
    bpo::notify(configuration);
    if (configuration.count("help")) {
        std::cout << _opts << "\n";
        return 1;
    }
    smp::configure(configuration);
    _configuration = {std::move(configuration)};
    engine.when_started().then([this] {
        scollectd::configure( this->configuration());
    }).then(
        std::move(func)
    ).rescue([] (auto get_ex) {
        try {
            get_ex();
        } catch (std::exception& ex) {
            std::cout << "program failed with uncaught exception: " << ex.what() << "\n";
            engine.exit(1);
        }
    });
    return engine.run();
}