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/// \file engine/tap_parser.hpp
/// Utilities to parse TAP test program output.

#if !defined(ENGINE_TAP_PARSER_HPP)
#define ENGINE_TAP_PARSER_HPP

#include "engine/tap_parser_fwd.hpp"

#include <cstddef>
#include <ostream>
#include <string>

#include "utils/fs/path_fwd.hpp"

namespace engine {


/// TAP plan representing all tests being skipped.
extern const engine::tap_plan all_skipped_plan;


/// TAP output representation and parser.
class tap_summary {
    /// Whether the test program bailed out early or not.
    bool _bailed_out;

    /// The TAP plan.  Only valid if not bailed out.
    tap_plan _plan;

    /// If not empty, the reason why all tests were skipped.
    std::string _all_skipped_reason;

    /// Total number of 'ok' tests.  Only valid if not balied out.
    std::size_t _ok_count;

    /// Total number of 'not ok' tests.  Only valid if not balied out.
    std::size_t _not_ok_count;

    tap_summary(const bool, const tap_plan&, const std::string&,
                const std::size_t, const std::size_t);

public:
    // Yes, these three constructors indicate that we really ought to have three
    // different classes and select between them at runtime.  But doing so would
    // be overly complex for our really simple needs here.
    static tap_summary new_bailed_out(void);
    static tap_summary new_all_skipped(const std::string&);
    static tap_summary new_results(const tap_plan&, const std::size_t,
                                   const std::size_t);

    bool bailed_out(void) const;
    const tap_plan& plan(void) const;
    const std::string& all_skipped_reason(void) const;
    std::size_t ok_count(void) const;
    std::size_t not_ok_count(void) const;

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


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


tap_summary parse_tap_output(const utils::fs::path&);


}  // namespace engine


#endif  // !defined(ENGINE_TAP_PARSER_HPP)