# -*- coding:utf-8 -*-
from unittest.mock import patch

import pytest

from dw_base.datax.runner import run_job


class _RC:
    def __init__(self, code): self.returncode = code


@patch('dw_base.datax.runner.subprocess.run')
def test_run_job_local_two_subprocess_calls(mock_run, tmp_path):
    mock_run.return_value = _RC(0)
    rc = run_job(
        ini_path=str(tmp_path / 'x.ini'),
        start_date='20260422', stop_date='20260423',
        worker_host='cdhmaster02', current_host='cdhmaster02',
        base_dir=str(tmp_path), python3_path='/usr/bin/python3',
        datax_home='/opt/datax',
    )
    assert rc == 0
    assert mock_run.call_count == 2  # 生成 json + 执行 datax.py
    first_argv = mock_run.call_args_list[0][0][0]
    assert first_argv[0] == '/usr/bin/python3'
    assert 'dw_base.datax.cli' in first_argv
    assert 'gen-json' in first_argv


@patch('dw_base.datax.runner.subprocess.run')
def test_run_job_remote_uses_ssh(mock_run, tmp_path):
    mock_run.return_value = _RC(0)
    rc = run_job(
        ini_path=str(tmp_path / 'x.ini'),
        start_date='20260422', stop_date='20260423',
        worker_host='cdhnode02', current_host='cdhmaster02',
        base_dir=str(tmp_path), python3_path='/usr/bin/python3',
        datax_home='/opt/datax',
    )
    assert rc == 0
    first_argv = mock_run.call_args_list[0][0][0]
    assert first_argv[0] == 'ssh'
    assert first_argv[1] == 'cdhnode02'
    # remote_cmd 是单字符串参数，cd base_dir && <cmd>
    assert first_argv[2].startswith('cd ')
    assert 'dw_base.datax.cli' in first_argv[2]
    assert 'gen-json' in first_argv[2]


@patch('dw_base.datax.runner.subprocess.run')
def test_run_job_local_injects_pythonpath(mock_run, tmp_path):
    """本机 subprocess 必须带 PYTHONPATH=base_dir 让 python -m 能找到 dw_base 包。"""
    mock_run.return_value = _RC(0)
    run_job(
        ini_path=str(tmp_path / 'x.ini'),
        start_date='20260422', stop_date='20260423',
        worker_host='cdhmaster02', current_host='cdhmaster02',
        base_dir=str(tmp_path), python3_path='/usr/bin/python3',
        datax_home='/opt/datax',
    )
    call_kwargs = mock_run.call_args_list[0][1]
    assert 'env' in call_kwargs
    assert str(tmp_path) in call_kwargs['env']['PYTHONPATH']


@patch('dw_base.datax.runner.subprocess.run')
def test_run_job_gen_failure_raises(mock_run, tmp_path):
    mock_run.return_value = _RC(1)
    with pytest.raises(RuntimeError, match='生成 DataX json 失败'):
        run_job(
            ini_path=str(tmp_path / 'x.ini'),
            start_date='20260422', stop_date='20260423',
            worker_host='cdhmaster02', current_host='cdhmaster02',
            base_dir=str(tmp_path), python3_path='/usr/bin/python3',
            datax_home='/opt/datax',
        )


@patch('dw_base.datax.runner.subprocess.run')
def test_run_job_skip_datax_only_runs_gen(mock_run, tmp_path):
    mock_run.return_value = _RC(0)
    rc = run_job(
        ini_path=str(tmp_path / 'x.ini'),
        start_date='20260422', stop_date='20260423',
        worker_host='cdhmaster02', current_host='cdhmaster02',
        base_dir=str(tmp_path), python3_path='/usr/bin/python3',
        datax_home='/opt/datax',
        skip_datax=True,
    )
    assert rc == 0
    assert mock_run.call_count == 1


import textwrap
from dw_base.datax.runner import _hdfs_src_check


def _ini_with_reader(tmp_path, reader_body):
    p = tmp_path / 'reader.ini'
    p.write_text(textwrap.dedent(reader_body), encoding='utf-8')
    return str(p)


def test_hdfs_src_check_na_for_non_hdfs_reader(tmp_path):
    ini = _ini_with_reader(tmp_path, '''\
        [reader]
        dataSource = postgresql/dev-x
        path = /some/path
    ''')
    assert _hdfs_src_check(ini, '20260422') == 'n/a'


def test_hdfs_src_check_na_when_no_reader(tmp_path):
    ini = tmp_path / 'empty.ini'
    ini.write_text('', encoding='utf-8')
    assert _hdfs_src_check(str(ini), '20260422') == 'n/a'


@patch('dw_base.datax.runner.subprocess.run')
def test_hdfs_src_check_missing(mock_run, tmp_path):
    # hadoop fs -test -e 返回非 0 → missing
    mock_run.return_value = _RC(1)
    ini = _ini_with_reader(tmp_path, '''\
        [reader]
        dataSource = hdfs/prd-ha
        path = /user/hive/warehouse/x/dt=${dt}/
    ''')
    assert _hdfs_src_check(ini, '20260422') == 'missing'


@patch('dw_base.datax.runner.subprocess.run')
def test_hdfs_src_check_empty_when_du_size_zero(mock_run, tmp_path):
    # 第一次调用 test -e → 0 成功，第二次调 du -s 返回 "0  .." → empty
    call_count = {'n': 0}

    def side_effect(*args, **kwargs):
        call_count['n'] += 1
        if call_count['n'] == 1:
            return _RC(0)
        return type('R', (), {'returncode': 0, 'stdout': b'0   0   /path\n', 'stderr': b''})()

    mock_run.side_effect = side_effect
    ini = _ini_with_reader(tmp_path, '''\
        [reader]
        dataSource = hdfs/prd-ha
        path = /user/hive/warehouse/x/dt=${dt}/
    ''')
    assert _hdfs_src_check(ini, '20260422') == 'empty'


@patch('dw_base.datax.runner._hdfs_src_check', return_value='missing')
@patch('dw_base.datax.runner.subprocess.run')
def test_run_job_fails_when_hdfs_src_missing(mock_run, _mock_check, tmp_path):
    """默认 HDFS missing → rc=1（失败，不 silent skip）。"""
    rc = run_job(
        ini_path=str(tmp_path / 'x.ini'),
        start_date='20260422', stop_date='20260423',
        worker_host='cdhmaster02', current_host='cdhmaster02',
        base_dir=str(tmp_path), python3_path='/usr/bin/python3',
        datax_home='/opt/datax',
    )
    assert rc == 1
    # 直接失败 → 不调 gen / exec
    assert mock_run.call_count == 0


@patch('dw_base.datax.runner._hdfs_src_check', return_value='empty')
@patch('dw_base.datax.runner.subprocess.run')
def test_run_job_fails_when_hdfs_src_empty(mock_run, _mock_check, tmp_path):
    """默认 HDFS empty → rc=1（失败）。"""
    mock_run.return_value = _RC(0)
    rc = run_job(
        ini_path=str(tmp_path / 'x.ini'),
        start_date='20260422', stop_date='20260423',
        worker_host='cdhmaster02', current_host='cdhmaster02',
        base_dir=str(tmp_path), python3_path='/usr/bin/python3',
        datax_home='/opt/datax',
    )
    assert rc == 1
    assert mock_run.call_count == 0


@patch('dw_base.datax.runner._hdfs_src_check')
@patch('dw_base.datax.runner.subprocess.run')
def test_run_job_skip_check_bypasses_hdfs_check(mock_run, mock_check, tmp_path):
    """skip_check=True → 不调 _hdfs_src_check，直接 gen-json + 跑 datax。"""
    mock_run.return_value = _RC(0)
    rc = run_job(
        ini_path=str(tmp_path / 'x.ini'),
        start_date='20260422', stop_date='20260423',
        worker_host='cdhmaster02', current_host='cdhmaster02',
        base_dir=str(tmp_path), python3_path='/usr/bin/python3',
        datax_home='/opt/datax',
        skip_check=True,
    )
    assert rc == 0
    mock_check.assert_not_called()
    assert mock_run.call_count == 2  # gen + exec 都照跑