// Unit test for the host->game mouse coordinate mapping (letterbox inverse +
// client-offset handling for WGC-of-decorated-window vs hooked/borderless).
#include <cstdio>

#include "inject/mkb_map.hpp"

using namespace coop;

namespace
{
int g_failures = 0;
void check(bool cond, const char* what)
{
	if (!cond)
	{
		std::printf("FAIL: %s\n", what);
		++g_failures;
	}
}
} // namespace

int main()
{
	// --- Hooked / borderless: frame == client, no offset. dst exactly matches src
	//     (no letterbox), so the mapping is the identity.
	{
		MkbMapInput in;
		in.dst_w = in.src_w = in.client_w = 1920;
		in.dst_h = in.src_h = in.client_h = 1080;
		int gx = 0, gy = 0;
		check(map_host_to_game_client(in, gx, gy) && gx == 0 && gy == 0, "identity: top-left");
		in.host_x = 960;
		in.host_y = 540;
		check(map_host_to_game_client(in, gx, gy) && gx == 960 && gy == 540, "identity: center");
	}

	// --- Letterbox: a 1600x900 (16:9) frame fit into a 1000x1000 host window. Scale
	//     = 1000/1600 = 0.625, vertical bars of (1000 - 562.5)/2 = 218.75 px.
	{
		MkbMapInput in;
		in.dst_w = 1000;
		in.dst_h = 1000;
		in.src_w = in.client_w = 1600;
		in.src_h = in.client_h = 900;
		int gx = 0, gy = 0;
		// A click in the top letterbox bar is rejected.
		in.host_x = 500;
		in.host_y = 10;
		check(!map_host_to_game_client(in, gx, gy), "letterbox: top bar rejected");
		// Center of the host window maps to center of the game frame.
		in.host_x = 500;
		in.host_y = 500;
		check(map_host_to_game_client(in, gx, gy) && gx == 800 && gy == 450, "letterbox: center maps to game center");
		// Just inside the image at the top edge (y = 218.75 -> 219) maps near client top.
		in.host_x = 500;
		in.host_y = 219;
		check(map_host_to_game_client(in, gx, gy) && gy >= 0 && gy <= 2, "letterbox: top edge maps near 0");
	}

	// --- WGC of a decorated window: frame is the whole window (1608x939) with the
	//     client area (1600x900) offset by an 8 px left border / 31 px title bar. No
	//     host letterbox here (dst matches the window frame).
	{
		MkbMapInput in;
		in.dst_w = in.src_w = 1608;
		in.dst_h = in.src_h = 939;
		in.client_off_x = 8;
		in.client_off_y = 31;
		in.client_w = 1600;
		in.client_h = 900;
		int gx = 0, gy = 0;
		// A click on the title bar (above the client area) is rejected.
		in.host_x = 800;
		in.host_y = 10;
		check(!map_host_to_game_client(in, gx, gy), "decorated: title bar rejected");
		// Client top-left corner.
		in.host_x = 8;
		in.host_y = 31;
		check(map_host_to_game_client(in, gx, gy) && gx == 0 && gy == 0, "decorated: client origin");
		// A point inside the client area subtracts the decoration offset.
		in.host_x = 108;
		in.host_y = 131;
		check(map_host_to_game_client(in, gx, gy) && gx == 100 && gy == 100, "decorated: client interior");
	}

	if (g_failures == 0)
	{
		std::printf("PASS: mkb_map_test\n");
		return 0;
	}
	std::printf("FAIL: %d checks failed\n", g_failures);
	return 1;
}