# ABOUTME: Tests for the selection filter DSL parser.
# ABOUTME: Covers all syntax variations: field:value, OR, negation, quotes.

import pytest

from animaltrack.selection.ast import FieldFilter, FilterAST
from animaltrack.selection.parser import ParseError, parse_filter


class TestSimpleFilters:
    """Test basic field:value syntax."""

    def test_single_field(self) -> None:
        """species:duck -> single field filter."""
        result = parse_filter("species:duck")
        assert result == FilterAST([FieldFilter("species", ["duck"])])

    def test_multiple_fields_and(self) -> None:
        """species:duck sex:female -> AND of two filters."""
        result = parse_filter("species:duck sex:female")
        assert result == FilterAST(
            [
                FieldFilter("species", ["duck"]),
                FieldFilter("sex", ["female"]),
            ]
        )

    def test_all_supported_fields(self) -> None:
        """All supported fields should parse."""
        result = parse_filter("location:strip1 species:duck sex:male life_stage:adult tag:healthy")
        assert len(result.filters) == 5
        assert result.filters[0].field == "location"
        assert result.filters[1].field == "species"
        assert result.filters[2].field == "sex"
        assert result.filters[3].field == "life_stage"
        assert result.filters[4].field == "tag"


class TestOrSyntax:
    """Test OR with pipe character."""

    def test_or_values(self) -> None:
        """species:duck|goose -> single filter with two values."""
        result = parse_filter("species:duck|goose")
        assert result == FilterAST([FieldFilter("species", ["duck", "goose"])])

    def test_multiple_or_values(self) -> None:
        """species:duck|goose|chicken -> three values."""
        result = parse_filter("species:duck|goose|chicken")
        assert result == FilterAST([FieldFilter("species", ["duck", "goose", "chicken"])])

    def test_or_combined_with_and(self) -> None:
        """species:duck|goose sex:female -> OR within field, AND between fields."""
        result = parse_filter("species:duck|goose sex:female")
        assert result == FilterAST(
            [
                FieldFilter("species", ["duck", "goose"]),
                FieldFilter("sex", ["female"]),
            ]
        )


class TestNegation:
    """Test negation with - prefix."""

    def test_negated_field(self) -> None:
        """-sex:male -> negated filter."""
        result = parse_filter("-sex:male")
        assert result == FilterAST([FieldFilter("sex", ["male"], negated=True)])

    def test_negated_with_or(self) -> None:
        """-species:duck|goose -> negated with OR values."""
        result = parse_filter("-species:duck|goose")
        assert result == FilterAST([FieldFilter("species", ["duck", "goose"], negated=True)])

    def test_mixed_negated_and_positive(self) -> None:
        """species:duck -tag:sick -> mix of positive and negated."""
        result = parse_filter("species:duck -tag:sick")
        assert result == FilterAST(
            [
                FieldFilter("species", ["duck"]),
                FieldFilter("tag", ["sick"], negated=True),
            ]
        )


class TestQuotedValues:
    """Test quoted strings for values with spaces."""

    def test_quoted_value(self) -> None:
        """location:"Strip 1" -> value with space."""
        result = parse_filter('location:"Strip 1"')
        assert result == FilterAST([FieldFilter("location", ["Strip 1"])])

    def test_quoted_with_other_fields(self) -> None:
        """location:"Strip 1" species:duck -> quoted and unquoted."""
        result = parse_filter('location:"Strip 1" species:duck')
        assert result == FilterAST(
            [
                FieldFilter("location", ["Strip 1"]),
                FieldFilter("species", ["duck"]),
            ]
        )

    def test_quoted_negated(self) -> None:
        """-location:"Strip 1" -> negated quoted value."""
        result = parse_filter('-location:"Strip 1"')
        assert result == FilterAST([FieldFilter("location", ["Strip 1"], negated=True)])

    def test_single_quoted_value(self) -> None:
        """location:'Strip 1' -> single quotes also work."""
        result = parse_filter("location:'Strip 1'")
        assert result == FilterAST([FieldFilter("location", ["Strip 1"])])


class TestIdentifiedField:
    """Test the identified field with flag syntax."""

    def test_identified_with_value(self) -> None:
        """identified:1 -> explicit value."""
        result = parse_filter("identified:1")
        assert result == FilterAST([FieldFilter("identified", ["1"])])

    def test_identified_zero(self) -> None:
        """identified:0 -> explicit false."""
        result = parse_filter("identified:0")
        assert result == FilterAST([FieldFilter("identified", ["0"])])

    def test_identified_flag(self) -> None:
        """identified -> shorthand for identified:1."""
        result = parse_filter("identified")
        assert result == FilterAST([FieldFilter("identified", ["1"])])

    def test_negated_identified_flag(self) -> None:
        """-identified -> shorthand for -identified:1."""
        result = parse_filter("-identified")
        assert result == FilterAST([FieldFilter("identified", ["1"], negated=True)])


class TestEmptyAndMatchAll:
    """Test empty filter string."""

    def test_empty_string(self) -> None:
        """Empty string -> match all."""
        result = parse_filter("")
        assert result == FilterAST([])
        assert result.is_match_all()

    def test_whitespace_only(self) -> None:
        """Whitespace only -> match all."""
        result = parse_filter("   ")
        assert result == FilterAST([])
        assert result.is_match_all()


class TestComplexFilters:
    """Test complex combinations."""

    def test_complex_filter(self) -> None:
        """Complex filter with all features."""
        result = parse_filter('species:duck|goose sex:female -tag:old location:"Strip 1"')
        assert result == FilterAST(
            [
                FieldFilter("species", ["duck", "goose"]),
                FieldFilter("sex", ["female"]),
                FieldFilter("tag", ["old"], negated=True),
                FieldFilter("location", ["Strip 1"]),
            ]
        )

    def test_multiple_negations(self) -> None:
        """Multiple negated filters."""
        result = parse_filter("-tag:sick -tag:old species:duck")
        assert result == FilterAST(
            [
                FieldFilter("tag", ["sick"], negated=True),
                FieldFilter("tag", ["old"], negated=True),
                FieldFilter("species", ["duck"]),
            ]
        )


class TestParseErrors:
    """Test error cases."""

    def test_unknown_field(self) -> None:
        """Unknown field raises ParseError."""
        with pytest.raises(ParseError) as exc_info:
            parse_filter("unknown:value")
        assert "unknown field" in str(exc_info.value).lower()

    def test_missing_colon(self) -> None:
        """Missing colon raises ParseError for non-flag fields."""
        with pytest.raises(ParseError) as exc_info:
            parse_filter("species")
        assert "missing" in str(exc_info.value).lower() or "invalid" in str(exc_info.value).lower()

    def test_empty_value(self) -> None:
        """Empty value after colon raises ParseError."""
        with pytest.raises(ParseError) as exc_info:
            parse_filter("species:")
        assert "empty" in str(exc_info.value).lower() or "value" in str(exc_info.value).lower()

    def test_unclosed_quote(self) -> None:
        """Unclosed quote raises ParseError."""
        with pytest.raises(ParseError) as exc_info:
            parse_filter('location:"Strip 1')
        assert "quote" in str(exc_info.value).lower() or "unclosed" in str(exc_info.value).lower()

    def test_empty_or_value(self) -> None:
        """Empty value in OR raises ParseError."""
        with pytest.raises(ParseError) as exc_info:
            parse_filter("species:duck|")
        assert "empty" in str(exc_info.value).lower()


class TestWhitespaceHandling:
    """Test whitespace handling."""

    def test_extra_spaces(self) -> None:
        """Extra spaces between terms are ignored."""
        result = parse_filter("species:duck   sex:female")
        assert result == FilterAST(
            [
                FieldFilter("species", ["duck"]),
                FieldFilter("sex", ["female"]),
            ]
        )

    def test_leading_trailing_spaces(self) -> None:
        """Leading and trailing spaces are trimmed."""
        result = parse_filter("  species:duck  ")
        assert result == FilterAST([FieldFilter("species", ["duck"])])