#pragma once

#if !defined(GUI_DEBUG_DISABLE)

#include <cstdio>
#include <cstdarg>
#include <cstring>

namespace GuiDebugPriv {
    inline FILE *s_file = stderr;

    inline void setFile(const char *path) {
        if (s_file && s_file != stderr) fclose(s_file);
        s_file = path ? fopen(path, "a") : nullptr;
        if (!s_file) s_file = stderr;
    }
}

inline void guiDebugFile(const char *path) { GuiDebugPriv::setFile(path); }

inline void guiDebugLog(char lvl, const char *file, int line,
                        const char *func, const char *fmt, ...) {
    const char *base = strrchr(file, '/');
    if (!base) base = strrchr(file, '\\');
    if (GuiDebugPriv::s_file != stderr)
        fprintf(GuiDebugPriv::s_file, "[1] ");
    fprintf(GuiDebugPriv::s_file, "[%c] %s:%d %s(): ",
            lvl, base ? base + 1 : file, line, func);
    va_list ap;
    va_start(ap, fmt);
    vfprintf(GuiDebugPriv::s_file, fmt, ap);
    va_end(ap);
    fprintf(GuiDebugPriv::s_file, "\n");
    fflush(GuiDebugPriv::s_file);
}

#define GUI_ERROR(fmt, ...) guiDebugLog('E', __FILE__, __LINE__, __func__, fmt, ##__VA_ARGS__)
#define GUI_WARN(fmt, ...)  guiDebugLog('W', __FILE__, __LINE__, __func__, fmt, ##__VA_ARGS__)
#define GUI_INFO(fmt, ...)  guiDebugLog('I', __FILE__, __LINE__, __func__, fmt, ##__VA_ARGS__)
#define GUI_DEBUG(fmt, ...) guiDebugLog('D', __FILE__, __LINE__, __func__, fmt, ##__VA_ARGS__)

#else

inline void guiDebugFile(const char*) {}
#define GUI_ERROR(...) ((void)0)
#define GUI_WARN(...)  ((void)0)
#define GUI_INFO(...)  ((void)0)
#define GUI_DEBUG(...) ((void)0)

#endif