#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import os
import shlex
import shutil
import socket
from pathlib import Path

from exec_capture import execute_capture
from exec_print_capture import execute_print_capture
from exec_print_receive import execute_print_receive_chunks
from exec_print_transfer import execute_print_transfer_chunks
from transfer_inform import transfer_inform


def test():
    # test1()
    # test2()
    # test3()
    # test4()
    # test5()
    test67()


def test1():
    _init(1)

    returncode, out, err = execute_capture(['ls', '-la'])
    print(f'stdout:\n{out}\nstderr:\n{err}')
    print()
    returncode, out, err = execute_capture(['ls', '/foo/bar'])
    print(f'stdout:\n{out}\nstderr:\n{err}')


def test2():
    _init(2)

    returncode, out, err = execute_print_capture(['ls', '-la'])
    print()
    returncode, out, err = execute_print_capture(['ls', '/foo/bar'])


def test3():
    _init(3)

    def _chunk_transfer(chunk_file: Path, eof: bool):
        print(f'Transferring chunk {chunk_file} to ... (This is the default method, it has no effect)')
        if eof:
            print(f'The last chunk has been transferred.')

    returncode = execute_print_transfer_chunks(['ls', '-la'], Path('test/3-1'), _chunk_transfer, ())
    print("TEST 3-2")
    returncode = execute_print_transfer_chunks(['ls', '/foo/bar'], Path('test/3-2'), _chunk_transfer, ())
    print("TEST 3-3")
    returncode = execute_print_transfer_chunks(['cat', 'transfer_inform.py'], Path('test/3-3'),
                                               _chunk_transfer, (),
                                               chunk_size=1024)


def test4():
    _init(4)

    transfer_inform(
        ['ls', 'test/4-rsync-error'],  # rsync src to dst
        ['ls', 'test/4-ssh-error'],  # ssh target-pc 'echo "OK" | nc -U "/path/to/unix-socket"'
        Path('test/4-UNIX-socket')
    )


def test5():
    _init(5)

    chunk_file_tmpl = Path('test/5')
    source_file = Path('transfer_inform.py')  # A python script file with some content to copy ;)
    remote_target_file = Path(f'test/5-copy-of-{source_file}')
    concat_script = Path('test/5-concat')

    concat_script.write_text(f'#!/usr/bin/bash\n'
                             f'echo "rsync $1 ... command output"\n'
                             f'cat "$1" >> "$2"')
    os.chmod(concat_script, 0o0755)

    # TODO:
    #   When running this test:
    #   The intentionally generated error, can be fixed by touching (creating) the missing file.

    execute_print_transfer_chunks(
        command=['cat', str(source_file)],
        chunk_file_tmpl=chunk_file_tmpl,
        chunk_transfer_fun=_test5_chunk_transfer_fun,
        chunk_transfer_args=(concat_script, remote_target_file),
        chunk_size=512,
    )


def _test5_chunk_transfer_fun(chunk_file: Path,
                              chunk_number: int,
                              eof: bool,
                              concat_script: Path,
                              remote_target_file: Path):
    rsync_cmd = [str(concat_script), str(chunk_file), str(remote_target_file)]
    inform_cmd = ['ls',
                  chunk_file.parent.joinpath(f'5.remote.EOF={eof}'),
                  ]

    transfer_inform(
        rsync_cmd=rsync_cmd,
        inform_cmd=inform_cmd,
        user_input_file=chunk_file.parent.joinpath(f'5.SOCKET'),
    )


def test67():
    hostname = socket.gethostname()
    if hostname == 'yodaTux':
        test6()  # LOCAL
    elif hostname == 'danctnix':
        test7()  # REMOTE
    else:
        print(f'Unknown hostname {hostname}')


def test6():
    _init(6)

    source_file = Path('transfer_inform.py')  # A python script file with some content to copy ;)
    chunk_file_tmpl = Path('test/6-transfer_inform.py')
    ssh_target = 'pine-pwdless'
    target_file_tmpl = Path(f'/home/alarm/subprocess_util/test/7-transfer_inform.py')

    execute_print_transfer_chunks(
        command=['cat', str(source_file)],
        chunk_file_tmpl=chunk_file_tmpl,
        chunk_transfer_fun=_test6_chunk_transfer_fun,
        chunk_transfer_args=(chunk_file_tmpl, ssh_target, target_file_tmpl),
        chunk_size=512,
    )


def _test6_chunk_transfer_fun(source_chunk: Path,
                              chunk_number: int,
                              eof: bool,
                              chunk_file_tmpl: Path,
                              ssh_target: str,
                              target_file_tmpl: Path,
                              ):
    target_chunk = target_file_tmpl.parent.joinpath(f'{target_file_tmpl.name}.{chunk_number}')
    rsync_cmd = ['rsync', str(source_chunk), f'{ssh_target}:{str(target_chunk)}']
    message = 'EOF' if eof else 'OK'
    target_socket = target_file_tmpl.parent.joinpath(f'{target_file_tmpl.name}.SOCKET')
    inform_cmd = ['ssh', ssh_target, f'echo {message} | nc -U {shlex.quote(str(target_socket))}']

    transfer_inform(
        rsync_cmd=rsync_cmd,
        inform_cmd=inform_cmd,
        user_input_file=source_chunk.parent.joinpath(f'{source_chunk.name}.SOCKET'),
    )


def test7():
    _init(7)

    target_file_tmpl = Path(f'/home/alarm/subprocess_util/test/7-transfer_inform.py')
    target_socket = target_file_tmpl.parent.joinpath(f'{target_file_tmpl.name}.SOCKET')

    execute_print_receive_chunks(
        ['tee', str(target_file_tmpl)],
        target_socket,
        target_file_tmpl,
    )


def _init(test_number: int):
    print(f"TEST {test_number}")
    test_dir = Path('test')
    if test_dir.exists():
        shutil.rmtree('test')
    Path('test').mkdir(exist_ok=False)


if __name__ == '__main__':
    test()