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#include "engine/execenv/execenv.hpp"

#include "engine/execenv/execenv_host.hpp"

namespace execenv = engine::execenv;

using utils::none;


const char* execenv::default_execenv_name = "host";


/// List of registered execution environments, except default host one.
///
/// Use register_execenv() to add an entry to this global list.
static std::vector< std::shared_ptr< execenv::manager > >
    execenv_managers;


void
execenv::register_execenv(const std::shared_ptr< execenv::manager > manager)
{
    execenv_managers.push_back(manager);
}


const std::vector< std::shared_ptr< execenv::manager> >
execenv::execenvs()
{
    return execenv_managers;
}


std::unique_ptr< execenv::interface >
execenv::get(const model::test_program& test_program,
             const std::string& test_case_name)
{
    for (auto m : execenv_managers) {
        auto e = m->probe(test_program, test_case_name);
        if (e != nullptr)
            return e;
    }

    return std::unique_ptr< execenv::interface >(
        new execenv::execenv_host(test_program, test_case_name));
}