from pathlib import Path

from common_cents.csv_export import write_csv
from common_cents.csv_import import parse_csv


def _row(date, cents, cat, merch=None, notes=None, tags=None):
    return {
        "date": date,
        "cents": cents,
        "category": cat,
        "merchant": merch,
        "notes": notes,
        "tags": tags or [],
    }


def test_export_then_import_roundtrip(tmp_path: Path):
    rows = [
        _row("2026-01-01", 100, "A", "M", None, ["x", "y"]),
        _row("2026-01-02", 200, "B", None, 'Hello, "world"'),
        _row("2026-01-03", 300, "C:D", None, None, ["t1", "t2", "t3"]),
    ]
    p = tmp_path / "out.csv"
    write_csv(p, rows)
    result = parse_csv(p)
    assert result.errors == []
    assert len(result.rows) == 3
    assert result.rows[0].tags == ["x", "y"]
    assert result.rows[1].notes == 'Hello, "world"'
    assert result.rows[2].tags == ["t1", "t2", "t3"]


def test_parse_csv_missing_required(tmp_path: Path):
    p = tmp_path / "bad.csv"
    p.write_text("DATE,MERCHANT\n2026-01-01,Joe\n")
    result = parse_csv(p)
    assert result.errors
    assert "CATEGORY" in result.errors[0]
    assert "CENTS" in result.errors[0]


def test_parse_csv_missing_optional_warns(tmp_path: Path):
    p = tmp_path / "ok.csv"
    p.write_text("DATE,CENTS,CATEGORY,MERCHANT\n2026-01-01,100,Food,Joe\n")
    result = parse_csv(p)
    assert result.errors == []
    assert any("NOTES" in w and "TAGS" in w for w in result.warnings)
    assert len(result.rows) == 1


def test_parse_csv_invalid_date(tmp_path: Path):
    p = tmp_path / "bad.csv"
    p.write_text("DATE,CENTS,CATEGORY,MERCHANT\nnot-a-date,100,Food,\n")
    result = parse_csv(p)
    assert any("invalid date" in e for e in result.errors)
    assert result.rows == []


def test_parse_csv_zero_cents_rejected(tmp_path: Path):
    p = tmp_path / "bad.csv"
    p.write_text("DATE,CENTS,CATEGORY,MERCHANT\n2026-01-01,0,Food,\n")
    result = parse_csv(p)
    assert any("positive" in e for e in result.errors)


def test_parse_csv_comma_formatted_cents(tmp_path: Path):
    p = tmp_path / "ok.csv"
    p.write_text(
        'DATE,CENTS,CATEGORY,MERCHANT\n2026-01-01,"14,901",Food,\n'
    )
    result = parse_csv(p)
    assert result.errors == []
    assert result.rows[0].cents == 14901


def test_export_sorts_nothing_within_row(tmp_path: Path):
    """write_csv preserves caller's tag order; sorting is the DB layer's job."""
    p = tmp_path / "out.csv"
    write_csv(p, [_row("2026-01-01", 100, "A", None, None, ["zeta", "alpha"])])
    text = p.read_text()
    assert '"zeta,alpha"' in text