#!/usr/bin/env python3
"""
Author: sp4ke
Email: contact@honeybadger.systems
Github: https://github.com/sp4ke
Description: run cargo commands on a remote workstation/server
"""

import argparse
from  invoke.exceptions import UnexpectedExit
from fabric import Connection
import sys
from pathlib import Path
import shutil

CARGO_BIN_PATH="~/.cargo/bin/"
DEPS = [
        "rsync"
        ]

ERR_CMD = 1
ERR_DEPENDENCY = 2

def inst_get_binary(conn, package):
    bin_path = Path(CARGO_BIN_PATH, package).expanduser()
    local_path = Path(CARGO_BIN_PATH).expanduser().__str__()+'/'
    get_remote_bin = conn.get(bin_path, local=local_path)
    print("installed {} at {}".format(package, CARGO_BIN_PATH))



def install(args):
    package = args.package
    conn = Connection(args.host)
    # uname = conn.run('uname -a', hide=True)
    # msg = 'ran {0.command!r} on {0.connection.host}, got stdout:\n{0.stdout}'
    # print(msg.format(uname))

    cargo_install = conn.run('cargo install {}'.format(package), hide=True, warn=True)
    print("{}".format(cargo_install.stdout.strip()))
    if cargo_install.failed:
        print(cargo_install.stderr)
        sys.exit(ERR_CMD)
    inst_get_binary(conn, package)


def ensure_deps():
    for dep in DEPS:
        installed = shutil.which(dep)
        if installed is None:
            print("{} dependency missing".format(dep), file=sys.stderr)
            sys.exit(ERR_DEPENDENCY)

if __name__ == '__main__':
    ensure_deps()
    parser = argparse.ArgumentParser(description='remote rust cargo commands')
    parser.add_argument('-H', '--host', default='sihil')
    #TODO: use a dynamic positional argument, we can pass anything to cargo
    #TODO: it will be tried on the remote cargo and raise error if it does
    #TODO: not exist. To do special handling (like install) just watch the 
    #TODO: argument value
    subparsers = parser.add_subparsers(dest='command')
    install_parser = subparsers.add_parser('install', help='install packages from crates.io with remote build')
    install_parser.set_defaults(func=install)
    install_parser.add_argument('package', help='package name', metavar='PACKAGE_NAME')
    build = subparsers.add_parser('build', help='remote build local cargo package')
    args = parser.parse_args()
    if args.command is not None:
        args.func(args)
    else:
        parser.print_help()