// -*- c++ -*-
// Distributed under the BSD 2-Clause License.
// See accompanying file LICENSE for details.
#include <iostream>
#include <array>
#include <cstdlib>
#include <span>

#define BOOTSTRAP

#include "ctor.h"

#include "util.cc"
#include "rebuild.cc"
#include "task.cc"
#include "task_cc.cc"
#include "task_ar.cc"
#include "execute.cc"
#include "tasks.cc"
#include "build.cc"
#include "tools.cc"

const std::filesystem::path configurationFile("configuration.cc");
const std::filesystem::path configHeaderFile("config.h");

const ctor::configuration& ctor::get_configuration()
{
	static ctor::configuration cfg;
	static bool initialised{false};
	if(!initialised)
	{
		cfg.build_toolchain = getToolChain(cfg.get(ctor::cfg::build_cxx, "/usr/bin/g++"));
		initialised = true;
	}

	return cfg;
}

bool ctor::configuration::has(const std::string& key) const
{
	return false;
}

const std::string& ctor::configuration::get(const std::string& key, const std::string& default_value) const
{
	auto cxx_env = std::getenv("CXX");
	if(key == ctor::cfg::build_cxx && cxx_env)
	{
		static std::string s = cxx_env;
		return s;
	}

	auto cc_env = std::getenv("CC");
	if(key == ctor::cfg::build_cc && cc_env)
	{
		static std::string s = cc_env;
		return s;
	}

	auto ld_env = std::getenv("LD");
	if(key == ctor::cfg::build_ld && ld_env)
	{
		static std::string s = ld_env;
		return s;
	}

	auto ar_env = std::getenv("AR");
	if(key == ctor::cfg::build_ar && ar_env)
	{
		static std::string s = ar_env;
		return s;
	}

	auto builddir_env = std::getenv("BUILDDIR");
	if(key == ctor::cfg::builddir && builddir_env)
	{
		static std::string s = builddir_env;
		return s;
	}

	return default_value;
}

int main(int argc, char* argv[])
{
	auto args = std::span(argv, static_cast<std::size_t>(argc));
	if(args.size() > 1)
	{
		std::cerr << "This is a minimal bootstrap version of " << args[0] <<
			" which doesn't support any arguments\n";
		return 1;
	}

	ctor::settings settings{};

	const auto& c = ctor::get_configuration();
	settings.builddir = c.get(ctor::cfg::builddir, settings.builddir);
	settings.parallel_processes =
		std::max(1u, std::thread::hardware_concurrency() * 2 - 1);
	settings.verbose = 0;
	auto all_tasks = getTasks(settings, {}, false);
	for(auto task : all_tasks)
	{
		if(task->registerDepTasks(all_tasks))
		{
			return 1;
		}
	}

	std::vector<Target> non_unittest_targets;
	auto& targets = getTargets(settings);
	for(const auto& target : targets)
	{
		if(target.config.type != ctor::target_type::unit_test &&
		   target.config.type != ctor::target_type::unit_test_library)
		{
			non_unittest_targets.push_back(target);
		}
	}

	auto ret = build(settings, "all", non_unittest_targets, all_tasks);
	if(ret != 0)
	{
		return ret;
	}

	return 0;
}