// Debug-only IPC test harness (compiled only when COOP_TEST_HARNESS is defined; the
// shipped product never contains it). Lets a test script drive the real overlay code
// paths -- inject, enable audio, re-measure, override, etc. -- by writing a command to
// %TEMP%\coop_test_cmd.txt and reading the reply from %TEMP%\coop_test_resp.txt, instead
// of simulating mouse/keyboard input (which ImGui doesn't accept reliably via PostMessage).
//
// Protocol: the driver writes one command line to the cmd file; the host consumes it
// (deleting the cmd file to ack), runs it on the main thread (so it hits the same code
// the UI buttons do), and writes a single response line to the resp file. One command at
// a time. See tools/test_drive notes / the per-phase validation scripts.
#pragma once

#include <string>

namespace coop
{

class TestHarness
{
public:
#ifdef COOP_TEST_HARNESS
	void init(); // resolve the %TEMP% file paths and clear any stale command
	// Main thread: returns the next pending command line (acking by deleting the cmd
	// file), or an empty string if none is waiting.
	std::string poll_command();
	// Main thread: write the response for the command just handled.
	void write_response(const std::string& resp);

private:
	std::wstring cmd_path_;
	std::wstring resp_path_;
#else
	// No-op shims so call sites don't need their own #ifdef.
	void init() {}
	std::string poll_command()
	{
		return {};
	}
	void write_response(const std::string&) {}
#endif
};

} // namespace coop