"""Unit tests for ts_shared_rev data cleaning helpers."""
import sys
import os
import pytest

# Add parent directory to path so we can import ts_shared_rev
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.dirname(__file__))))

# Set required env vars before import
os.environ.setdefault("TRACKSOLID_APP_KEY", "test_key")
os.environ.setdefault("TRACKSOLID_APP_SECRET", "test_secret")
os.environ.setdefault("TRACKSOLID_USER_ID", "test_user")
os.environ.setdefault("TRACKSOLID_PWD_MD5", "test_md5")
os.environ.setdefault("DATABASE_URL", "postgresql://test:test@localhost:5432/test")

from ts_shared_rev import clean, clean_num, clean_int, clean_ts, is_valid_fix


class TestClean:
    def test_none_returns_none(self):
        assert clean(None) is None

    def test_empty_string_returns_none(self):
        assert clean("") is None

    def test_whitespace_only_returns_none(self):
        assert clean("   ") is None

    def test_normal_string_preserved(self):
        assert clean("hello") == "hello"

    def test_strips_whitespace(self):
        assert clean("  hello  ") == "hello"

    def test_non_string_converted(self):
        assert clean(123) == "123"

    def test_zero_preserved(self):
        assert clean(0) == "0"


class TestCleanNum:
    def test_valid_float_string(self):
        assert clean_num("3.14") == pytest.approx(3.14)

    def test_valid_integer_string(self):
        assert clean_num("42") == pytest.approx(42.0)

    def test_non_numeric_returns_none(self):
        assert clean_num("abc") is None

    def test_none_returns_none(self):
        assert clean_num(None) is None

    def test_empty_string_returns_none(self):
        assert clean_num("") is None

    def test_numeric_value_passthrough(self):
        assert clean_num(45.5) == pytest.approx(45.5)

    def test_negative_value(self):
        assert clean_num("-1.5") == pytest.approx(-1.5)


class TestCleanInt:
    def test_integer_string(self):
        assert clean_int("42") == 42

    def test_float_string_truncates(self):
        assert clean_int("3.9") == 3

    def test_non_numeric_returns_none(self):
        assert clean_int("abc") is None

    def test_none_returns_none(self):
        assert clean_int(None) is None


class TestCleanTs:
    def test_valid_iso_timestamp(self):
        result = clean_ts("2024-04-12 08:00:00")
        assert result == "2024-04-12 08:00:00"

    def test_valid_iso_with_timezone(self):
        result = clean_ts("2024-04-12T08:00:00Z")
        assert result is not None

    def test_garbage_returns_none(self):
        assert clean_ts("not-a-date") is None

    def test_none_returns_none(self):
        assert clean_ts(None) is None

    def test_empty_string_returns_none(self):
        assert clean_ts("") is None

    def test_bcd_format_returns_none(self):
        # BCD format YYMMDDHHmmss is NOT handled by clean_ts (only by _parse_trip_ts)
        assert clean_ts("220415103000") is None


class TestIsValidFix:
    def test_zero_island_filtered(self):
        assert is_valid_fix(0.0, 0.0) is False

    def test_valid_nairobi_coords(self):
        assert is_valid_fix(-1.2921, 36.8219) is True

    def test_none_lat_returns_false(self):
        assert is_valid_fix(None, 36.8219) is False

    def test_none_lng_returns_false(self):
        assert is_valid_fix(-1.2921, None) is False

    def test_out_of_range_lat(self):
        assert is_valid_fix(91.0, 36.8219) is False

    def test_out_of_range_lng(self):
        assert is_valid_fix(-1.2921, 181.0) is False

    def test_valid_extreme_coords(self):
        assert is_valid_fix(90.0, 180.0) is True

    def test_string_coords_accepted(self):
        assert is_valid_fix("-1.2921", "36.8219") is True