#include "memory/MemoryManager.h"
#include "sys/Syscall.h"
#include "thread/Scheduler.h"
#include <luna/PathParser.h>

Result<u64> sys_chdir(Registers*, SyscallArgs args)
{
    auto path = TRY(MemoryManager::strdup_from_user(args[0]));

    Thread* current = Scheduler::current();

    if (PathParser::is_absolute(path.view()))
    {
        SharedPtr<VFS::Inode> inode = TRY(VFS::resolve_path(path.chars(), current->auth));

        if (inode->type() != VFS::InodeType::Directory) return err(ENOTDIR);

        current->current_directory = inode;
        current->current_directory_path = move(path);

        return 0;
    }
    else
    {
        SharedPtr<VFS::Inode> inode = TRY(VFS::resolve_path(path.chars(), current->auth, current->current_directory));

        if (inode->type() != VFS::InodeType::Directory) return err(ENOTDIR);

        auto old_wdir = current->current_directory_path.view();

        String new_path = TRY(PathParser::join(old_wdir.is_empty() ? "/"_sv : old_wdir, path.view()));

        current->current_directory = inode;
        current->current_directory_path = move(new_path);

        return 0;
    }
}