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

from p1st.exec_capture import execute_capture
from p1st.exec_print_capture import execute_print_capture
from p1st.exec_produce_chunks import execute_produce_chunks
from p1st.transfer_inform import transfer_inform


def test():
    # test1()
    # test2()
    # test4()
    # test8()
    # test9()
    # test10()
    # test11()
    # test12()
    test13()


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 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_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 test8():
    repo_name = 'subprocess_util'

    child_name = 'test-subvolume'
    child_dir = '/mnt/backup/test-dir'
    child_path = f'{child_dir}/{child_name}'
    target_dir = '/mnt/data/test-dir'
    target_path = f'{target_dir}/{child_name}'
    ssh_target = 'rootnas'

    print(f'=== In one shell, connect with "ssh nas" ===')
    print(f'\tsudo mkdir {target_dir}')
    print(f'\tcd {repo_name} && make && sudo make clean && cd ..')
    print()
    print(f'\tsudo btrfs-receive-chunks {target_path}')
    print()

    print(f'=== In another shell, connect with "ssh odroid" ===')
    print(f'\tsudo mkdir {child_dir}')
    print(f'\tsudo btrfs subvolume create {child_path}.writeable')
    print(f'\techo foo | sudo tee {child_path}.writeable/bar')
    print(f'\tsudo btrfs subvolume snapshot -r {child_path}.writeable {child_path}')
    print(f'\tcd {repo_name} && make && sudo make clean && cd ..')
    print()
    print(f'\tsudo btrfs-send-chunks {child_path} {ssh_target} {target_path}')


def test9():
    child_path = '/mnt/backup/snap/blogger.privacy1st.de/20230104T2255'
    ssh_target = 'rootnas'
    target_path = '/mnt/data/test/blogger.privacy1st.de/20230104T2255'
    print(f'sudo btrfs-receive-chunks {target_path}')
    print(f'sudo btrfs-send-chunks {child_path} {ssh_target} {target_path}')


def test10():
    _init(10)

    source_file = Path('src/p1st/transfer_inform.py')
    chunk_dir = Path('test')
    target_file = Path('test/transfer_inform.py')

    def get_chunk_path(chunk_no: int):
        return chunk_dir.joinpath(f'{source_file.name}.CHUNK.{chunk_no}')

    def handle_chunk(chunk_no: int, last_chunk: bool):
        chunk_path = get_chunk_path(chunk_no)
        print(f'Handling chunk {chunk_path}')

        # Read chunk.
        chunk = chunk_path.read_bytes()
        # Append chunk to target.
        with target_file.open("ab") as f:
            f.write(chunk)
        # Delete chunk.
        chunk_path.unlink(missing_ok=False)

    execute_produce_chunks(
        command=['cat', str(source_file)],
        get_chunk_path=get_chunk_path,
        handle_chunk=handle_chunk,
        chunk_size=512,
    )


def test11():
    repo_name = 'subprocess_util'

    child_name = 'test-subvolume'
    child_dir = '/mnt/backup/test-dir'
    child_path = f'{child_dir}/{child_name}'
    target_dir = '/mnt/data/test-dir'
    target_path = f'{target_dir}/{child_name}'
    ssh_target = 'rootnas'

    print(f'=== In one shell, connect with "ssh nas" ===')
    print(f'\tsudo mkdir {target_dir}')
    print(f'\tcd {repo_name} && make && sudo make clean && cd ..')
    print()
    print(f'\tsudo btrfs-receive-chunks-v2 {target_path}')
    print()

    print(f'=== In another shell, connect with "ssh odroid" ===')
    print(f'\tsudo mkdir {child_dir}')
    print(f'\tsudo btrfs subvolume create {child_path}.writeable')
    print(f'\techo foo | sudo tee {child_path}.writeable/bar')
    print(f'\tsudo btrfs subvolume snapshot -r {child_path}.writeable {child_path}')
    print(f'\tcd {repo_name} && make && sudo make clean && cd ..')
    print()
    print(f'\tsudo btrfs-send-chunks-v2 {child_path} {ssh_target} {target_path}')


def test12():
    child_path = '/mnt/backup/snap/blogger.privacy1st.de/20230104T2255'
    ssh_target = 'rootnas'
    target_path = '/mnt/data/test/blogger.privacy1st.de/20230104T2255'
    target_chunk_path = '/mnt/data/test/chunks'
    print(f'nas:    sudo btrfs-receive-chunks-v2 --chunk-dir={target_chunk_path} {target_path}')
    print(
        f'odroid: sudo btrfs-send-chunks-v2 --chunk-dir=/mnt/backup/test/chunks --target-chunk-dir={target_chunk_path} {child_path} {ssh_target} {target_path}')


def test13():
    ssh_source = 'rootnas'
    source_path = '/mnt/data/snap/blogger.privacy1st.de/20230104T1622_u'
    source_chunk_dir = '/mnt/data/test/chunks'

    target_path = '/mnt/backup/test/blogger.privacy1st.de/20230104T1622_u'

    print(f'nas:    sudo btrfs-send-chunks-v3 --chunk-dir={source_chunk_dir} {source_path}')
    print(f'odroid: sudo btrfs-receive-chunks-v3 {ssh_source} {source_chunk_dir} {target_path}')


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()