// SPDX-License-Identifier: ISC
// SPDX-FileCopyrightText: 2024 Matthew Wozniak <me@woz.blue>

#include "api.h"
#include "hook.h"
#include "log.h"
#include "os.h"

#include <stddef.h>
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>

void (*orig_cbuf_addtext)(char *);
void hook_cbuf_addtext(char *str) {
	orig_cbuf_addtext(str);
	info("%s", str);
	// this is the last thing that happens when the game is opened
	if (!strcmp(str, "exec modsettings.cfg mod\n")) {
		demoplayer->vt->start_playback(demoplayer, "demo.dem", false);
	}
}

char *cmdline;
char WINAPI *hook_GetCommandLineA(void) {
	return cmdline;
}

void *(WINAPI *orig_LoadLibraryExA)(const char *, void *, int);
void WINAPI *hook_LoadLibraryExA(const char *filename, void *hfile, int flags) {
	// if the dll is already loaded, don't run our code again
	if (os_dlhandle(filename))
		return orig_LoadLibraryExA(filename, hfile, flags);
	void *ret = orig_LoadLibraryExA(filename, hfile, flags);
	if (!ret) return ret;
	// cut down to basename for display
	const char *basename = filename;
	for (const char *p = filename; *p; p++)
		if (*p == '\\') basename = p + 1;
	info("loaded %s", basename);

	if (!strcmp(basename, "engine.dll")) {
		if (!api_init()) die("couldn't get apis");
		orig_cbuf_addtext = (void (*)(char *))
			hook_inline((void *)cbuf_addtext, (void *)hook_cbuf_addtext);
	}
	return ret;
}

typedef int (*LauncherMain_t)(void *instance, void *prev_inst, char *cmdline,
		int cmd_show);

int main(/* int argc, char **argv */) {
	SetDllDirectoryA("bin/");

	// TODO: make this changeable by the user
	cmdline = "hl2.exe -console -w 1280 -h 720 -window -high -dxlevel 95";

	hook_init();
	orig_LoadLibraryExA = (typeof(orig_LoadLibraryExA))hook_dllapi("kernel32",
			"LoadLibraryExA", (void *)hook_LoadLibraryExA);
	hook_dllapi("kernel32", "GetCommandLineA", (void *)hook_GetCommandLineA);

	info("GetCommandLineA() = %s", GetCommandLineA()); 

	void *launcher_dll = os_dlopen("launcher");
	LauncherMain_t launcher_main =
		(LauncherMain_t)os_dlsym(launcher_dll, "LauncherMain");

	if (!launcher_main) die("couldn't open launcher");
	launcher_main(NULL, NULL, cmdline, 0);
}

// vi: sw=4 ts=4 noet tw=80 cc=80