#include <Ice/ObjectAdapter.h>
#include <sys/stat.h>
#include "repo.h"
#include "blob.h"
#include "dir.h"

GitFS::Repo::Repo() :
	repo(Git::RepositoryOpenBare("/usr/portage/.git")),
	commit(Git::CommitLookup(repo, Git::OidParse("97a435f30472eb941f96234d274b3aeb492e2793"))),
	tree(Git::TreeLookup(repo, *git_commit_tree_id(commit.get())))
{
}

void
GitFS::Repo::disconnect(const ::Ice::Current& current)
{
	current.adapter->remove(current.id);
}


NetFS::DirectoryPrxPtr
GitFS::Repo::opendir(ReqEnv, ::std::string path, const ::Ice::Current& ice)
{
	return Ice::uncheckedCast<NetFS::DirectoryV2Prx>(ice.adapter->addWithUUID(
				std::make_shared<Directory>(tree, path)));
}


NetFS::VFS
GitFS::Repo::statfs(ReqEnv, ::std::string, const ::Ice::Current&)
{
	return {};
}


int
GitFS::Repo::access(ReqEnv, ::std::string path, int mode, const ::Ice::Current&)
{
	if (mode & W_OK) return EACCES;
	if (path.empty()) return EINVAL;
	if (path == "/") return 0;

	try {
		auto e = Git::TreeEntryByPath(tree, path);
		const auto emode = git_tree_entry_filemode(e.get());

		if (S_ISDIR(emode)) return 0;
		if (mode & R_OK && !(S_IRUSR & emode)) return EACCES;
		if (mode & X_OK && !(S_IXUSR & emode)) return EACCES;

		return 0;
	}
	catch (const Git::Error & e) {
		if (e.err == GIT_ENOTFOUND) {
			return ENOENT;
		}
		throw NetFS::SystemError(EIO);
	}
}


NetFS::Attr
GitFS::Repo::getattr(ReqEnv, ::std::string path, const ::Ice::Current&)
{
	NetFS::Attr a {};
	(void)path;
	a.ctime = a.atime = a.mtime = git_commit_time(commit.get());
	return a;
}


::std::string
GitFS::Repo::readlink(ReqEnv, ::std::string path, const ::Ice::Current&)
{
	auto e = Git::TreeEntryByPath(tree, path);
	if (!e) throw NetFS::SystemError(ENOENT);
	const auto emode = git_tree_entry_filemode(e.get());
	if (!S_ISLNK(emode)) throw NetFS::SystemError(EINVAL);
	return {};
}


NetFS::FilePrxPtr
GitFS::Repo::open(ReqEnv, ::std::string path, int, const ::Ice::Current& ice)
{
	return Ice::uncheckedCast<NetFS::FilePrx>(ice.adapter->addWithUUID(
				std::make_shared<Blob>(repo, Git::TreeEntryByPath(tree, path))));
}


NetFS::FilePrxPtr
GitFS::Repo::create(ReqEnv, ::std::string, int, int, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::truncate(ReqEnv, ::std::string, long long int, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::unlink(ReqEnv, ::std::string, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::mkdir(ReqEnv, ::std::string, int, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::rmdir(ReqEnv, ::std::string, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::mknod(ReqEnv, ::std::string, int, int, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::symlink(ReqEnv, ::std::string, ::std::string, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::link(ReqEnv, ::std::string, ::std::string, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::rename(ReqEnv, ::std::string, ::std::string, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::chmod(ReqEnv, ::std::string, int, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::chown(ReqEnv, ::std::string, int, int, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}


void
GitFS::Repo::utimens(ReqEnv, ::std::string, long long int, long long int, long long int, long long int, const ::Ice::Current&)
{
	throw NetFS::SystemError(EROFS);
}