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/// \file engine/metadata.hpp
/// Representation of the metadata of a test program or test case.

#if !defined(ENGINE_METADATA_HPP)
#define ENGINE_METADATA_HPP

#include <map>
#include <memory>
#include <ostream>
#include <set>
#include <string>

#include "utils/noncopyable.hpp"
#include "utils/shared_ptr.hpp"

namespace utils {
namespace config { class tree; }
namespace datetime { class delta; }
namespace fs { class path; }
namespace units { class bytes; }
}  // namespace utils

namespace engine {


// TODO(jmmv): All these types should probably be in individual header files so
// that we could include them without pulling in additional dependencies.
/// Collection of paths.
typedef std::set< utils::fs::path > paths_set;
/// Collection of strings.
typedef std::set< std::string > strings_set;
/// Collection of test properties in their textual form.
typedef std::map< std::string, std::string > properties_map;


extern utils::datetime::delta default_timeout;


class metadata_builder;


/// Collection of metadata properties of a test.
class metadata {
    struct impl;

    /// Pointer to the shared internal implementation.
    std::shared_ptr< impl > _pimpl;

    friend class metadata_builder;

public:
    metadata(const utils::config::tree&);
    ~metadata(void);

    const strings_set& allowed_architectures(void) const;
    const strings_set& allowed_platforms(void) const;
    properties_map custom(void) const;
    const std::string& description(void) const;
    bool has_cleanup(void) const;
    const strings_set& required_configs(void) const;
    const paths_set& required_files(void) const;
    const utils::units::bytes& required_memory(void) const;
    const paths_set& required_programs(void) const;
    const std::string& required_user(void) const;
    const utils::datetime::delta& timeout(void) const;

    engine::properties_map to_properties(void) const;

    bool operator==(const metadata&) const;
    bool operator!=(const metadata&) const;
};


std::ostream& operator<<(std::ostream&, const metadata&);


/// Builder for a metadata object.
class metadata_builder : utils::noncopyable {
    struct impl;

    /// Pointer to the shared internal implementation.
    std::unique_ptr< impl > _pimpl;

public:
    metadata_builder(void);
    explicit metadata_builder(const engine::metadata&);
    ~metadata_builder(void);

    metadata_builder& add_allowed_architecture(const std::string&);
    metadata_builder& add_allowed_platform(const std::string&);
    metadata_builder& add_custom(const std::string&, const std::string&);
    metadata_builder& add_required_config(const std::string&);
    metadata_builder& add_required_file(const utils::fs::path&);
    metadata_builder& add_required_program(const utils::fs::path&);

    metadata_builder& set_allowed_architectures(const strings_set&);
    metadata_builder& set_allowed_platforms(const strings_set&);
    metadata_builder& set_custom(const properties_map&);
    metadata_builder& set_description(const std::string&);
    metadata_builder& set_has_cleanup(const bool);
    metadata_builder& set_required_configs(const strings_set&);
    metadata_builder& set_required_files(const paths_set&);
    metadata_builder& set_required_memory(const utils::units::bytes&);
    metadata_builder& set_required_programs(const paths_set&);
    metadata_builder& set_required_user(const std::string&);
    metadata_builder& set_string(const std::string&, const std::string&);
    metadata_builder& set_timeout(const utils::datetime::delta&);

    metadata build(void) const;
};


std::string check_reqs(const engine::metadata&, const utils::config::tree&,
                       const std::string&);


}  // namespace engine


#endif  // !defined(ENGINE_METADATA_HPP)