import sys, os
sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..")))
from comparator.field_compare import compare_field, DEFAULT_TOLERANCE


def test_exact_match():
    r = compare_field("BR-AMT", "1500000", "1500000", "decimal")
    assert r.status == "PASS"


def test_within_tolerance():
    r = compare_field("BR-AMT", "1500000", "1499999.99", "decimal", tolerance=DEFAULT_TOLERANCE)
    assert r.status == "TOLERATED"


def test_beyond_tolerance():
    r = compare_field("BR-AMT", "1500000", "1000000", "decimal", tolerance=DEFAULT_TOLERANCE)
    assert r.status == "MISMATCH"


def test_string_trim():
    r = compare_field("BR-STATUS", "A  ", "A", "string")
    assert r.status == "PASS"


def test_date_normalization():
    r = compare_field("BR-DATE", "20260522", "2026-05-22", "date")
    assert r.status == "PASS"


def test_cobol_default():
    from decimal import Decimal, ROUND_DOWN
    r = compare_field("BR-AMT", "\x00\x00\x00\x00\x00", "0", "decimal")
    assert r.status in ("PASS", "TOLERATED")


def test_java_null_vs_value():
    r = compare_field("BR-AMT", "1500000", "None", "decimal")
    assert r.status in ("MISMATCH", "NOT_SET")


def test_negative_numbers():
    r = compare_field("AMT", "-1500", "-1500", "decimal")
    assert r.status == "PASS"


def test_mixed_precision():
    r = compare_field("AMT", "1500.00", "1500", "decimal", tolerance=DEFAULT_TOLERANCE)
    assert r.status == "PASS"