// EterBase/Debug.cpp (the 40250 non-_DEBUG build): OpenLogFile sends stderr to syserr.txt and, with true,
// opens log.txt for Log*/Trace*; SetLogLevel filters Log*. Its own process because stderr is redirected, so
// failures go to stdout.
#include "EterBase/StdAfx.h"
#include "EterBase/Debug.h"

#include <cstdio>
#include <fstream>
#include <sstream>
#include <string>
#include <unistd.h>

static int g_failures = 0;
#define CHECK(cond)                                                    \
	do {                                                               \
		if (!(cond)) {                                                 \
			std::printf("%s:%d: CHECK(%s)\n", __FILE__, __LINE__, #cond); \
			++g_failures;                                              \
		}                                                              \
	} while (0)

static std::string ReadAll(const char* path)
{
	std::ifstream in(path);
	std::stringstream ss;
	ss << in.rdbuf();
	return ss.str();
}

int main()
{
	char dir[] = "/tmp/mt_debuglog_XXXXXX";
	if (!mkdtemp(dir) || chdir(dir) != 0)
		return 1;

	// Before OpenLogFile nothing reaches a log file.
	Tracenf("before %d", 1);

	OpenLogFile(true);
	SetLogLevel(1);
	Logn(0, "level0");
	Logn(1, "level1");
	Lognf(2, "lognf %d", 2);
	Logf(0, "logf-filtered");
	Tracen("tracen");
	Tracef("tracef %s\n", "x");
	TraceError("oops %d", 7);
	LogFilef("filef %d\n", 3);
	fflush(stderr);

	const std::string log = ReadAll("log.txt");
	const std::string syserr = ReadAll("syserr.txt");
	CHECK(log.find("before") == std::string::npos);
	CHECK(log.find("level0") == std::string::npos);
	CHECK(log.find(" :: level1") != std::string::npos);
	CHECK(log.find(" :: lognf 2\n") != std::string::npos);
	CHECK(log.find("logf-filtered") == std::string::npos);
	CHECK(log.find(" :: tracen") != std::string::npos);
	CHECK(log.find(" :: tracef x\n") != std::string::npos);
	CHECK(log.find(" :: SYSERR: oops 7\n") != std::string::npos);
	CHECK(log.find(" :: filef 3\n") != std::string::npos);
	CHECK(syserr.find(" :: oops 7\n") != std::string::npos && syserr.find("SYSERR") == std::string::npos);

	unlink("log.txt");
	unlink("syserr.txt");
	chdir("/");
	rmdir(dir);
	if (g_failures)
		std::printf("port_debug_log_test: %d failure(s)\n", g_failures);
	else
		std::puts("port_debug_log_test: ok");
	return g_failures ? 1 : 0;
}