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import csv
import json
import logging
import os

import pytest

from fuzzycat.verify import Status, compare

VERIFY_CSV = os.path.join(os.path.dirname(os.path.realpath(__file__)), "data/verify.csv")
RELEASE_ENTITIES_DIR = os.path.join(os.path.dirname(os.path.realpath(__file__)), "data/release")
FATCAT_BASE_URL = 'https://fatcat.wiki/'

status_mapping = {
    "Status.AMBIGUOUS": Status.AMBIGUOUS,
    "Status.DIFFERENT": Status.DIFFERENT,
    "Status.EXACT": Status.EXACT,
    "Status.STRONG": Status.STRONG,
    "Status.WEAK": Status.WEAK,
}

logger = logging.getLogger('test_verify')
logger.setLevel(logging.DEBUG)


def load_release_ident(ident):
    dst = os.path.join(RELEASE_ENTITIES_DIR, ident)
    if not os.path.exists(dst):
        pytest.fail("cannot find entity locally, run `make` in tests/data/ to fetch")
    with open(dst) as f:
        return json.load(f)


def test_compare():
    with open(VERIFY_CSV) as f:
        reader = csv.reader(f, delimiter=',')
        for i, row in enumerate(reader):
            try:
                a, b, expected_status, expected_reason = row
            except ValueError as exc:
                pytest.fail(
                    "invalid test file, maybe too many (or few) commas in row {}? {}".format(
                        i + 1, exc))
            status, reason = compare(load_release_ident(a), load_release_ident(b))
            if not expected_status or expected_status.lower() == "todo":
                logger.warning(
                    "skipping test {base}release/{a} {base}release/{b} -- no result defined (we think {status}, {reason})"
                    .format(a=a, b=b, base=FATCAT_BASE_URL, status=status, reason=reason))
                continue
            assert status_mapping[
                expected_status] == status, "status: want {expected_status}, got {status} {reason} for {base}release/{a} {base}release/{b}".format(
                    expected_status=expected_status,
                    status=status,
                    reason=reason,
                    base=FATCAT_BASE_URL,
                    a=a,
                    b=b)
            if expected_reason:
                assert expected_reason.lower() == reason.lower(
                ), "reason [{base}release/{a} {base}release/{b}]: want {reason}, got {expected_reason}".format(
                    base=FATCAT_BASE_URL, a=a, b=b, expected_reason=expected_reason, reason=reason)
        logger.info("ran verification over {} cases (https://git.io/JkDgS)".format(i))