#ifndef BASE_PLATFORM_H
#define BASE_PLATFORM_H

//- Linux
#if PLATFORM_LINUX || PLATFORM_UNIX


//- Types

typedef void(LibSym)(void *);


typedef struct LibrarySymbols LibrarySymbols;
struct LibrarySymbols {
 LibSym *current_sym;
 LibSym *next_sym;
 LibSym *previous_sym;
};

typedef struct SharedLibrary SharedLibrary;
struct SharedLibrary {
 void           *mem;
 cstring         name;
 LibrarySymbols *symbols;
};

typedef struct Directory Directory;
struct Directory {
 String8List *file_names;
};

#define LinuxLoadSharedLibrary(arena, name) unix_load_shared_library(arena, name)
#define LoadSharedLibrary (arena, name) LinuxLoadSharedLibrary(arena, name)
#define PlatformGetCurrentTime(format) unix_get_current_time(format)

//- Shared libraries
internal void *unix_shared_library_get_proc_from_name(SharedLibrary *library, const char *name);
internal void  unix_load_shared_library(MemArena *arena);
internal int   unix_shared_library_close(SharedLibrary *library);

internal String8 unix_get_env(const char *var);

//- File I/O
internal b32          unix_file_write(String8 data, String8 path);
internal String8      unix_file_load(MemArena *arena, String8 path);
internal b32          unix_file_exists(String8 path);
internal String8List *unix_open_dir(MemArena *arena,
                                    String8  *original_path); // TODO: change the return value

internal s64  unix_read(int fd, const void *buf, u64 count);
internal void unix_os_exit() __attribute__((noreturn));

internal s64  unix_log(int fd, const void *buf, u64 count);
internal void unix_log_with_args(const char *format, ...);

#define FileLoad(arena, path) unix_file_load(arena, path)
#define FileWrite(data, path) unix_file_write(data, path)
#define FileExists(path) unix_file_exists(path)
#define DirLoadFileNames(arena, path) unix_open_dir(arena, path)

#if DEBUG
#define OSExit(code) _exit(code)
#define Log(...) unix_log_with_args(__VA_ARGS__)
#define LogStr8(message) Log(Str8Fmt, Str8Arg(message))
#else
#define OSExit(code) Unused(code)
#define Log(...) ((void)0)
#define LogStr8(message) ((void)0)
#endif // disable comments when debug mode is disabled

//- Entrypoint
#define ENTRYPOINT() int main(int argc, char **args)

//- Windows
#elif PLATFORM_WINDOWS

#define STDIN 0
#define STDOUT 1
#define STDERR 2

//- Shared libraries
internal void *win32_load_library();
internal void  win32_library_get_proc();

//- File I/O
internal b32         win32_file_exists(u8 *path);
internal b32         win32_file_write(String8 data, String8 path);
internal String8     win32_file_load(MemArena *arena, String8 file);
internal String8List win32_open_dir(MemArena *arena, String8 *original_path); // TODO: ...

internal b32  win32_os_exit();
internal void win32_handle_error(MemArena *arena, DWORD error);
internal u64  safe_truncate_64(u64 value);

internal void win32_log(String8List messages);

#define FileLoad(arena, path) win32_file_load(arena, path)
#define FileWrite(data, path) win32_file_write(data, path)
#define FileExists(path) win32_file_exists(path)
#define Win32FileExists(path) win32_file_exists(path)
#define DirLoad(arena, path) win32_open_dir(arena, original_path);

#define OSExit(code) win32_os_exit()

#if COMPILER_GCC || COMPILER_CLANG

#define PRINTF_FORMAT(fmt, args) __attribute__((format(printf, fmt, args)))
internal void win32_logf(const char *fmt, ...) PRINTF_FORMAT;

#elif COMPILER_MSVC
internal void win32_logf(_Printf_format_string_ const char *fmt, ...);

#define Log(fmt, ...) win32_logf(fmt, ##__VA_ARGS__)

#endif // COMPILER_GCC || COMPILER_CLANG

//- Entrypoint
#if COMPILER_MSVC
#pragma warning(disable : 28251) // disabled the annotations warning that are defined in winbase.h
#define ENTRYPOINT(hinstance, prev_instance, cmd_line, show_cmd) \
 int WINAPI WinMain(hinstance, prev_instance, cmd_line, show_cmd)
#endif // COMPIPILER_MSVC DISABLE WARNING

#endif // PLATFORM_LINUX || PLATFORM_WINDOWS

#endif // BASE_PLATFORM_H