import io
import pathlib

import pytest
from . import DATA_DIR, normalize_whitespace

from import2ledger import __main__ as i2lmain

ARGLIST = [
    '-C', (DATA_DIR / 'test_main.ini').as_posix(),
]

def run_main(arglist):
    stdout = io.StringIO()
    stderr = io.StringIO()
    exitcode = i2lmain.main(arglist, stdout, stderr)
    stdout.seek(0)
    stderr.seek(0)
    return exitcode, stdout, stderr

def iter_entries(in_file):
    lines = []
    for line in in_file:
        if line == '\n':
            if lines:
                yield ''.join(lines)
            lines = []
        else:
            lines.append(line)
    if lines:
        yield ''.join(lines)

def entries2set(in_file):
    return set(normalize_whitespace(e) for e in iter_entries(in_file))

def expected_entries(path):
    path = pathlib.Path(path)
    if not path.is_absolute():
        path = DATA_DIR / path
    with path.open() as in_file:
        return entries2set(in_file)

def test_fees_import():
    arglist = ARGLIST + [
        '-c', 'One',
        pathlib.Path(DATA_DIR, 'PatreonEarnings.csv').as_posix(),
    ]
    exitcode, stdout, _ = run_main(arglist)
    assert exitcode == 0
    actual = entries2set(stdout)
    assert actual == expected_entries('test_main_fees_import.ledger')

def test_date_range_import():
    arglist = ARGLIST + [
        '-c', 'One',
        '--date-range', '2017/10/01-',
        pathlib.Path(DATA_DIR, 'PatreonEarnings.csv').as_posix(),
    ]
    exitcode, stdout, _ = run_main(arglist)
    assert exitcode == 0
    actual = entries2set(stdout)
    expected = {entry for entry in expected_entries('test_main_fees_import.ledger')
                if entry.startswith('2017/10/')}
    assert actual == expected