import pytest

import gti_discovery
from gti_discovery.catalog import FirebirdCatalog
from gti_discovery.collector import _approved_fixture_reader
from gti_discovery.firebird_queries import (
    _ADAPTER_REGISTRATION_TOKEN,
    _APPROVED_ADAPTER_TYPES,
    _CATALOG_QUERIES,
    _INTERNAL_QUERIES,
    _execute_catalog,
    _register_approved_adapter,
)
from gti_discovery.collector import _APPROVED_FIXTURE_TYPES


class RecordingAdapter:
    read_only = True

    def __init__(self):
        self.calls = []

    def execute(self, sql, params=()):
        self.calls.append((sql, params))
        return []


_register_approved_adapter(RecordingAdapter, _ADAPTER_REGISTRATION_TOKEN)


def make_structured_connection():
    return FirebirdCatalog(RecordingAdapter())


def test_public_connection_has_no_sql_execute_method():
    connection = make_structured_connection()
    for name in ("execute", "query", "raw_execute", "execute_statement", "run_sql", "_run"):
        assert not hasattr(connection, name)
        assert name not in gti_discovery.__all__


def test_package_exports_no_raw_sql_or_parser_authority():
    forbidden = {
        "execute", "query", "raw_execute", "execute_statement", "run_sql",
        "validate_read_only",
    }
    assert forbidden.isdisjoint(vars(gti_discovery))
    assert forbidden.isdisjoint(gti_discovery.__all__)


def test_private_sql_runner_cannot_bypass_operation_boundary():
    connection = make_structured_connection()
    assert not hasattr(connection, "_run")
    assert not hasattr(connection, "_run_sql")


def test_unknown_operation_key_never_reaches_driver():
    adapter = RecordingAdapter()
    with pytest.raises(ValueError):
        _execute_catalog(adapter, "SELECT * FROM X")
    assert adapter.calls == []


@pytest.mark.parametrize(
    "forbidden_operation",
    ["execute_procedure", "select_procedure", "execute_selectable_procedure", "invoke_udf"],
)
def test_procedure_and_udf_operations_never_reach_driver(forbidden_operation):
    adapter = RecordingAdapter()

    with pytest.raises(ValueError, match="unknown catalog operation"):
        _execute_catalog(adapter, forbidden_operation)

    assert adapter.calls == []


def test_procedure_api_is_metadata_only():
    adapter = RecordingAdapter()
    catalog = FirebirdCatalog(adapter)

    assert catalog.get_procedures() == []
    assert catalog.get_procedure_parameters() == []
    assert not any("EXECUTE PROCEDURE" in sql.upper() for sql, _ in adapter.calls)
    assert not any("FROM " + name in sql.upper() for name in ("SP_RECALC", "SOME_UDF") for sql, _ in adapter.calls)


@pytest.mark.parametrize("operation_key", [None, 1, [], {}, bytearray(b"database"), str("database") + ""])
def test_operation_key_must_be_an_exact_approved_string(operation_key):
    adapter = RecordingAdapter()
    if type(operation_key) is str:
        pytest.skip("control case is tested by the static operation tests")
    with pytest.raises(ValueError, match="operation"):
        _execute_catalog(adapter, operation_key)
    assert adapter.calls == []


def test_str_subclass_is_not_an_operation_key():
    class Lookalike(str):
        pass

    adapter = RecordingAdapter()
    with pytest.raises(ValueError, match="operation"):
        _execute_catalog(adapter, Lookalike("database"))
    assert adapter.calls == []


def test_arbitrary_adapter_is_rejected_before_driver_invocation():
    class ArbitraryAdapter:
        def execute(self, sql, params=()):
            raise AssertionError("driver must not be invoked")

    with pytest.raises(TypeError, match="approved implementation"):
        _execute_catalog(ArbitraryAdapter(), "database")


def test_catalog_rejects_unregistered_read_only_adapter_before_driver_invocation():
    class LookalikeAdapter:
        read_only = True

        def execute(self, sql, params=()):
            raise AssertionError("driver must not be invoked")

    with pytest.raises(TypeError, match="approved implementation"):
        FirebirdCatalog(LookalikeAdapter())


def test_catalog_close_cannot_act_on_unregistered_adapter():
    class LookalikeAdapter:
        read_only = True
        closed = False

        def execute(self, sql, params=()):
            raise AssertionError("driver must not be invoked")

        def close(self):
            self.closed = True

    adapter = LookalikeAdapter()
    with pytest.raises(TypeError, match="approved implementation"):
        FirebirdCatalog(adapter)
    assert adapter.closed is False


def test_fixture_reader_registration_requires_private_capability():
    class UntrustedReader:
        pass

    with pytest.raises(TypeError):
        _approved_fixture_reader(UntrustedReader)


def test_catalog_queries_are_immutable_and_operation_keyed():
    with pytest.raises(TypeError):
        _CATALOG_QUERIES["new"] = "SELECT 1"
    assert set(_CATALOG_QUERIES) == {
        "database", "relations", "fields", "keys", "indexes", "foreign_keys",
        "triggers", "procedures", "procedure_parameters", "packages", "generators",
        "dependencies", "monitoring",
    }


def test_private_approved_type_registries_are_immutable_snapshots():
    assert isinstance(_APPROVED_ADAPTER_TYPES, type(_CATALOG_QUERIES))
    assert isinstance(_APPROVED_FIXTURE_TYPES, type(_CATALOG_QUERIES))
    with pytest.raises(TypeError):
        _APPROVED_ADAPTER_TYPES[RecordingAdapter] = True
    with pytest.raises(TypeError):
        _APPROVED_FIXTURE_TYPES[RecordingAdapter] = True


def test_registration_mutators_are_not_publicly_exported():
    for name in ("_register_approved_adapter", "_approved_fixture_reader"):
        assert name not in gti_discovery.__all__
        assert not hasattr(gti_discovery, name)


def test_threat_model_documents_accidental_boundary_scope():
    from pathlib import Path

    state = Path("docs/AI_PROJECT_STATE.md").read_text(encoding="utf-8")
    report = Path("docs/MISSION_00_REPORT.md").read_text(encoding="utf-8")
    required = (
        "implementation mistakes", "accidental unauthorized operations",
        "arbitrary SQL", "wrong database", "writes", "procedures/UDFs",
        "injection", "dependency shadowing",
    )
    for phrase in required:
        assert phrase in state
        assert phrase in report
    assert "arbitrary Python" in state
    assert "same process" in report


def test_legitimate_firebird_syntax_reaches_driver_without_old_parser(monkeypatch):
    adapter = RecordingAdapter()
    query = _INTERNAL_QUERIES["expression_probe"]
    monkeypatch.setattr("gti_discovery.read_only.validate_read_only", lambda _: (_ for _ in ()).throw(AssertionError()))
    _execute_catalog(adapter, "expression_probe")
    assert adapter.calls == [(query, ())]