/*****************************************************************************
 * Copyright (c) 2014-2020 OpenRCT2 developers
 *
 * For a complete list of all authors, please refer to contributors.md
 * Interested in contributing? Visit https://github.com/OpenRCT2/OpenRCT2
 *
 * OpenRCT2 is licensed under the GNU General Public License version 3.
 *****************************************************************************/

#pragma once

#include <cstdint>

enum class DiagnosticLevel
{
    Fatal,
    Error,
    Warning,
    Verbose,
    Information,
    Count
};

/**
 * Compile-time debug levels.
 *
 * When compiling, just add -DDEBUG={0,1,2,3} (where 0 means disabled)
 * Regardless of DEBUG value, a set of defines will be created:
 * - DEBUG_LEVEL_1
 * - DEBUG_LEVEL_2
 * - DEBUG_LEVEL_3
 * which you would use like so:
 *
 * #if DEBUG_LEVEL_1
 *     (... some debug code ...)
 *     #if DEBUG_LEVEL_2
 *         (... more debug code ...)
 *    #endif // DEBUG_LEVEL_2
 * #endif // DEBUG_LEVEL_1
 *
 * The defines will be either 0 or 1 so compiler will complain about undefined
 * macro if you forget to include the file, which would not happen if we were
 * only checking whether the define is present or not.
 */

#if defined(DEBUG)
#    if DEBUG > 0
#        define DEBUG_LEVEL_1 1
#        if DEBUG > 1
#            define DEBUG_LEVEL_2 1
#            if DEBUG > 2
#                define DEBUG_LEVEL_3 1
#            else
#                define DEBUG_LEVEL_3 0
#            endif // DEBUG > 2
#        else
#            define DEBUG_LEVEL_3 0
#            define DEBUG_LEVEL_2 0
#        endif // DEBUG > 1
#    else
#        define DEBUG_LEVEL_1 0
#        define DEBUG_LEVEL_2 0
#        define DEBUG_LEVEL_3 0
#    endif // DEBUG > 0
#else
#    define DEBUG_LEVEL_3 0
#    define DEBUG_LEVEL_2 0
#    define DEBUG_LEVEL_1 0
#endif // defined(DEBUG)

extern bool _log_levels[static_cast<uint8_t>(DiagnosticLevel::Count)];

void diagnostic_log(DiagnosticLevel diagnosticLevel, const char* format, ...);
void diagnostic_log_with_location(
    DiagnosticLevel diagnosticLevel, const char* file, const char* function, int32_t line, const char* format, ...);

#ifdef _MSC_VER
#    define diagnostic_log_macro(level, format, ...)                                                                           \
        diagnostic_log_with_location(level, __FILE__, __FUNCTION__, __LINE__, format, ##__VA_ARGS__)
#else
#    define diagnostic_log_macro(level, format, ...)                                                                           \
        diagnostic_log_with_location(level, __FILE__, __func__, __LINE__, format, ##__VA_ARGS__)
#endif // _MSC_VER

#define log_fatal(format, ...) diagnostic_log_macro(DiagnosticLevel::Fatal, format, ##__VA_ARGS__)
#define log_error(format, ...) diagnostic_log_macro(DiagnosticLevel::Error, format, ##__VA_ARGS__)
#define log_warning(format, ...) diagnostic_log_macro(DiagnosticLevel::Warning, format, ##__VA_ARGS__)
#define log_verbose(format, ...) diagnostic_log(DiagnosticLevel::Verbose, format, ##__VA_ARGS__)
#define log_info(format, ...) diagnostic_log_macro(DiagnosticLevel::Information, format, ##__VA_ARGS__)