#include <uunit.h>

#include <fstream>
#include <map>
#include <vector>

#include <execute.h>
#include <util.h>
#include <algorithm>

#include "paths.h"
#include "tmpfile.h"

class ExecuteTest
	: public uUnit
{
public:
	ExecuteTest()
	{
		uTEST(ExecuteTest::return_value);
		uTEST(ExecuteTest::env);
	}

	void return_value()
	{
		ctor::settings s;
		auto cur_path = std::filesystem::path(paths::argv_0).parent_path();
		std::vector<std::string> paths{{cur_path.string()}};
		auto cmd = locate("testprog", paths);
		uASSERT(!cmd.empty());

		auto value = execute(s, cmd, {"retval", "0"}, {}, false);
		assert_equal(0, value, __FILE__, __LINE__);
		value = execute(s, cmd, {"retval", "1"}, {}, false);
		assert_equal(1, value, __FILE__, __LINE__);
		value = execute(s, "no-such-binary", {}, {}, false);
		assert_equal(1, value, __FILE__, __LINE__);
	}

	void env()
	{
		using namespace std::string_literals;

		ctor::settings s;
		auto cur_path = std::filesystem::path(paths::argv_0).parent_path();
		std::vector<std::string> paths{{cur_path.string()}};
		auto cmd = locate("testprog", paths);
		uASSERT(!cmd.empty());

		tmp_file tmp;

		std::map<std::string, std::string> env;

		// New env vars
		env["foo"] = "bar";
		env["bar"] = "42";

		// Overwrite the exiting LANG var
		env["LANG"] = "foo";

		auto value = execute(s, cmd, {"envdump", tmp.get()}, env, false);
		assert_equal(0, value, __FILE__, __LINE__);

		std::vector<std::string> vars;
		{
			std::ifstream infile(tmp.get());
			std::string line;
			while (std::getline(infile, line))
			{
				vars.push_back(line);
			}
		}

		// Check the two explicitly set vars
		auto chk = std::find(vars.begin(), vars.end(), "foo=bar"s);
		uASSERT(chk != vars.end());
		chk = std::find(vars.begin(), vars.end(), "bar=42"s);
		uASSERT(chk != vars.end());

		// Check the one that should have overwritten the existing one (probably LANG=en_US.UTF-8 or something)
		chk = std::find(vars.begin(), vars.end(), "LANG=foo"s);
		uASSERT(chk != vars.end());

		// Check that other vars are also there (ie. the env wasn't cleared on entry)
		uASSERT(vars.size() > 3);
	}
};

// Registers the fixture into the 'registry'
static ExecuteTest test;