const { Errors } = require('../../shared')
const { NodeDescriptorType } = require('../../enum')

module.exports = exports = async (message, di) => {
    const send_error = (err) => message.send_response(
        message.fresh().error(err)
    )

    const new_fd = (node_uuid) => {
        if ( !message.socket.session.last_file_descriptor ) {
            message.socket.session.last_file_descriptor = 0
            message.socket.session.file_descriptors = {}
        }

        message.socket.session.last_file_descriptor += 1
        message.socket.session.file_descriptors[message.socket.session.last_file_descriptor] = node_uuid
        return message.socket.session.last_file_descriptor
    }

    const Node = di.models.get('fs:Node')
    const { path, flags } = message.data()

    if ( !path ) return send_error(Errors.NodeDoesNotExist)
    if ( path === '/' ) return send_error(Errors.IsDirectoryDescriptor)

    const node = await Node.get_path(path, message.socket.session.overlay_name || 'mainline')
    if ( !node ) send_error(Errors.NodeDoesNotExist)
    if ( node.descriptor_type === NodeDescriptorType.Directory ) send_error(Errors.IsDirectoryDescriptor)

    message.send_response(
        message.fresh().data({ node: node.to_api(), descriptor: new_fd(node.uuid) })
    )
}