#include "../file.h"

#include <errno.h>
#include <fs/context.h>
#include <fs/file.h>
#include <fs/status.h>

extern kern_status_t fs_msg_open(
	xpc_context_t *xpc,
	xpc_endpoint_t *sender,
	const xpc_string_t *path,
	int flags,
	int *out_err,
	void *arg)
{
	char path_buf[4096];
	size_t path_len = 0;
	kern_status_t status
		= xpc_string_read(path, path_buf, sizeof path_buf, &path_len);
	if (status != KERN_OK) {
		return status;
	}

	struct fs_context *ctx = arg;

	struct fs_file *f = fs_context_open_file(ctx, sender->e_port);
	if (!f) {
		*out_err = ENOMEM;
		return KERN_OK;
	}

	if (f->f_inode) {
		*out_err = EBUSY;
		return KERN_OK;
	}

	struct fs_dentry *dent = NULL;
	enum fs_status fs_status
		= fs_context_resolve_path(ctx, path_buf, &dent);
	if (fs_status != FS_SUCCESS) {
		fs_context_close_file(ctx, f);
		*out_err = fs_status_to_errno(status);
		return KERN_OK;
	}

	f->f_seek = 0;
	f->f_dent = dent;
	f->f_inode = dent->d_inode;
	f->f_ops = dent->d_inode->i_fops;

	*out_err = SUCCESS;
	return KERN_OK;
}