# This file is run by shell scripts generated by the aos_downloader Skylark
# macro. Everything before the first -- is a hard-coded list of files to
# download.

from __future__ import print_function

import sys
import subprocess
import re
import os


def install(ssh_target, pkg, ssh_path, scp_path):
    """Installs a package from NI on the ssh target."""
    print("Installing", pkg)
    PKG_URL = "http://download.ni.com/ni-linux-rt/feeds/2015/arm/ipk/cortexa9-vfpv3/" + pkg
    subprocess.check_call(["wget", PKG_URL, "-O", pkg])
    try:
        subprocess.check_call([
            scp_path, "-S", ssh_path, pkg,
            ssh_target + ":/tmp/" + pkg
        ])
        subprocess.check_call([
            ssh_path, ssh_target, "opkg", "install",
            "/tmp/" + pkg
        ])
        subprocess.check_call(
            [ssh_path, ssh_target, "rm", "/tmp/" + pkg])
    finally:
        subprocess.check_call(["rm", pkg])


def main(argv):
    args = argv[argv.index("--") + 1:]

    relative_dir = ""
    recursive = False

    if "--dirs" in argv:
        dirs_index = argv.index("--dirs")
        srcs = argv[1:dirs_index]
        relative_dir = argv[dirs_index + 1]
        recursive = True
    else:
        srcs = argv[1:argv.index("--")]

    ROBORIO_TARGET_DIR = "/home/admin/robot_code"
    ROBORIO_USER = "admin"

    target_dir = ROBORIO_TARGET_DIR
    user = ROBORIO_USER
    destination = args[-1]

    result = re.match("(?:([^:@]+)@)?([^:@]+)(?::([^:@]+))?", destination)
    if not result:
        print(
            "Not sure how to parse destination \"%s\"!" % destination,
            file=sys.stderr)
        return 1
    if result.group(1):
        user = result.group(1)
    hostname = result.group(2)
    if result.group(3):
        target_dir = result.group(3)

    ssh_target = "%s@%s" % (user, hostname)

    ssh_path = "external/ssh/ssh"
    scp_path = "external/ssh/scp"

    rsync_cmd = ([
        "external/rsync/usr/bin/rsync", "-e", ssh_path, "-c",
        "-v", "-z", "--copy-links"
    ] + srcs + ["%s:%s/%s" % (ssh_target, target_dir, relative_dir)])
    try:
        subprocess.check_call(rsync_cmd)
    except subprocess.CalledProcessError as e:
        if e.returncode == 127 or e.returncode == 12:
            print("Unconfigured roboRIO, installing rsync.")
            install(ssh_target, "libattr1_2.4.47-r0.36_cortexa9-vfpv3.ipk",
                    ssh_path, scp_path)
            install(ssh_target, "libacl1_2.2.52-r0.36_cortexa9-vfpv3.ipk",
                    ssh_path, scp_path)
            install(ssh_target, "rsync_3.1.0-r0.7_cortexa9-vfpv3.ipk",
                    ssh_path, scp_path)
            subprocess.check_call(rsync_cmd)
        else:
            raise e

    if not recursive:
        subprocess.check_call(
            (ssh_path, ssh_target, "&&".join([
                "chmod u+s %s/starter_exe" % target_dir,
                "echo \'Done moving new executables into place\'",
                "bash -c \'sync && sync && sync\'",
            ])))


if __name__ == "__main__":
    main(sys.argv)