"""
Unit tests pentru `LookupService` (mock Oracle).

Acoperire:
  - Cache hit/miss per schema (tip_deviz, masini, asiguratori, inspectori, operatii)
  - LIKE escape în search_parteneri (%, _, \\ neutralizate)
  - min 2 chars validation pentru search_parteneri
  - get_masina_details: row absent → None
  - Reset cache între teste (autouse) — atât `_cache` din lookup_service
    cât și `_schema_cache` din _context.

Niciun test nu atinge Oracle real: `oracle_pool.get_connection` și `get_schema`
sunt monkeypatched. Stilul urmează `test_comanda_helpers.py` (pytest-asyncio
auto-mode din pyproject.toml — fără decoratori).
"""
from typing import List, Optional, Sequence
from unittest.mock import MagicMock

import pytest

from backend.modules.service_auto.services import lookup_service
from backend.modules.service_auto.services._context import reset_schema_cache


# ============================================================
# Fakes pentru oracle_pool.get_connection
# ============================================================

class _FakeCursor:
    """Cursor sincron: __enter__/__exit__ + execute/fetchall/fetchone."""

    def __init__(self, fetchall_rows=None, fetchone_row=None):
        self._fetchall_rows = fetchall_rows if fetchall_rows is not None else []
        self._fetchone_row = fetchone_row
        self.execute = MagicMock()

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc, tb):
        return False

    def fetchall(self):
        return self._fetchall_rows

    def fetchone(self):
        return self._fetchone_row


class _FakeConn:
    def __init__(self, cursor: _FakeCursor):
        self._cursor = cursor

    def cursor(self):
        return self._cursor


class _FakeConnCM:
    """Async context manager imitând `@asynccontextmanager` din oracle_pool."""

    def __init__(self, conn: _FakeConn):
        self._conn = conn

    async def __aenter__(self):
        return self._conn

    async def __aexit__(self, exc_type, exc, tb):
        return False


class _PoolStub:
    """
    Înlocuiește `oracle_pool.get_connection` — întoarce cursori în ordinea dată.
    Numără apelurile (per server_id, dacă vrem să verificăm propagarea).
    """

    def __init__(self, cursors: Sequence[_FakeCursor]):
        self._cursors = list(cursors)
        self.call_count = 0
        self.server_ids: List[Optional[str]] = []

    def get_connection(self, server_id=None):
        self.call_count += 1
        self.server_ids.append(server_id)
        if not self._cursors:
            raise AssertionError("PoolStub epuizat: get_connection apelat de mai multe ori decât cursori furnizați")
        cursor = self._cursors.pop(0)
        return _FakeConnCM(_FakeConn(cursor))


def _install_pool(monkeypatch, cursors: Sequence[_FakeCursor]) -> _PoolStub:
    """Patchează `oracle_pool.get_connection` în lookup_service."""
    stub = _PoolStub(cursors)
    monkeypatch.setattr(lookup_service.oracle_pool, "get_connection", stub.get_connection)
    return stub


def _install_schema(monkeypatch, schema: str = "MARIUSM_AUTO"):
    """Patchează `get_schema` ca să nu lovim DB pentru rezolvarea schemei."""
    async def _fake_get_schema(company_id, server_id):  # noqa: ARG001
        return schema
    monkeypatch.setattr(lookup_service, "get_schema", _fake_get_schema)


# ============================================================
# Reset cache între teste — OBLIGATORIU
# ============================================================

@pytest.fixture(autouse=True)
def _reset_caches():
    lookup_service.reset_cache()
    reset_schema_cache()
    yield
    lookup_service.reset_cache()
    reset_schema_cache()


# ============================================================
# get_tip_deviz
# ============================================================

async def test_tip_deviz_cache_miss_then_hit(monkeypatch):
    """A doua chemare pentru aceeași schemă → fără query nou."""
    cursor = _FakeCursor(fetchall_rows=[(1, "POST GARANTIE", 1)])
    pool = _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch, "MARIUSM_AUTO")

    res1 = await lookup_service.LookupService.get_tip_deviz(167)
    res2 = await lookup_service.LookupService.get_tip_deviz(167)

    assert pool.call_count == 1, "A doua chemare trebuia să vină din cache"
    assert res1 == res2
    assert res1[0].id_tip == 1
    assert res1[0].denumire == "POST GARANTIE"
    assert res1[0].inch_validare == 1


async def test_tip_deviz_inch_validare_null_defaults_to_zero(monkeypatch):
    """`inch_validare` NULL în DB → 0 (Pydantic int)."""
    cursor = _FakeCursor(fetchall_rows=[(2, "GARANTIE", None)])
    _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    res = await lookup_service.LookupService.get_tip_deviz(167)
    assert res[0].inch_validare == 0


async def test_tip_deviz_different_schema_triggers_new_query(monkeypatch):
    """Schemă diferită (alt id_firma) → query nou (cache key e per schema)."""
    cur1 = _FakeCursor(fetchall_rows=[(1, "POST GARANTIE", 1)])
    cur2 = _FakeCursor(fetchall_rows=[(1, "POST GARANTIE", 1)])
    pool = _install_pool(monkeypatch, [cur1, cur2])

    schemas = iter(["MARIUSM_AUTO", "ALTA_FIRMA_AUTO"])
    async def _switching_schema(_company_id, _server_id):
        return next(schemas)
    monkeypatch.setattr(lookup_service, "get_schema", _switching_schema)

    await lookup_service.LookupService.get_tip_deviz(167)
    await lookup_service.LookupService.get_tip_deviz(110)

    assert pool.call_count == 2, "Schemă diferită ⇒ cache miss ⇒ query nou"


# ============================================================
# get_masini
# ============================================================

async def test_masini_cache_hit_avoids_second_query(monkeypatch):
    cursor = _FakeCursor(fetchall_rows=[
        (101, "B-32-CTL", "DACIA", "LOGAN", 2018, "ION ION SRL"),
    ])
    pool = _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    res1 = await lookup_service.LookupService.get_masini(167)
    res2 = await lookup_service.LookupService.get_masini(167)

    assert pool.call_count == 1
    assert res1[0].id_masiniclient == 101
    assert "ION ION SRL" in res1[0].label
    assert "B-32-CTL" in res1[0].label
    assert "(2018)" in res1[0].label
    assert res1 == res2


async def test_masini_label_handles_missing_marca_and_year(monkeypatch):
    """Vehicul fără marca/an: fallback labels '?' fără paranteze."""
    cursor = _FakeCursor(fetchall_rows=[
        (102, "CT-10-EEE", None, None, None, None),
    ])
    _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    res = await lookup_service.LookupService.get_masini(167)
    assert res[0].label == "? — ?, CT-10-EEE"


# ============================================================
# get_asiguratori
# ============================================================

async def test_asiguratori_cache_miss_then_hit(monkeypatch):
    cursor = _FakeCursor(fetchall_rows=[(7, "ALLIANZ ȚIRIAC")])
    pool = _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    await lookup_service.LookupService.get_asiguratori(167)
    res2 = await lookup_service.LookupService.get_asiguratori(167)

    assert pool.call_count == 1
    assert res2[0].id_asigurator == 7
    assert res2[0].denumire == "ALLIANZ ȚIRIAC"


# ============================================================
# get_inspectori (cache key e per (schema, id_asigurator))
# ============================================================

async def test_inspectori_cache_per_asigurator(monkeypatch):
    """Cache cheie include id_asigurator → schimbare asigurator ⇒ query nou."""
    cur1 = _FakeCursor(fetchall_rows=[(11, "POPESCU ION", 7)])
    cur2 = _FakeCursor(fetchall_rows=[(22, "IONESCU MARIA", 8)])
    pool = _install_pool(monkeypatch, [cur1, cur2])
    _install_schema(monkeypatch)

    await lookup_service.LookupService.get_inspectori(7, 167)
    await lookup_service.LookupService.get_inspectori(7, 167)  # hit
    await lookup_service.LookupService.get_inspectori(8, 167)  # miss (alt asigurator)

    assert pool.call_count == 2


# ============================================================
# get_operatii
# ============================================================

async def test_operatii_cache_and_timpn_null_handling(monkeypatch):
    """Cache hit + timpn NULL rămâne None (nu 0.0)."""
    cursor = _FakeCursor(fetchall_rows=[
        (501, "OP-001", "Schimb ulei", 1.5),
        (502, "OP-002", "Aliniere", None),
    ])
    pool = _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    res1 = await lookup_service.LookupService.get_operatii(167)
    res2 = await lookup_service.LookupService.get_operatii(167)

    assert pool.call_count == 1
    assert res1 == res2
    assert res1[0].timpn == 1.5
    assert res1[1].timpn is None


# ============================================================
# search_parteneri — LIKE escape + min 2 chars
# ============================================================

async def test_search_parteneri_min_2_chars_returns_empty_without_query(monkeypatch):
    """q='a' (1 char) → [] FĂRĂ să atingă DB."""
    pool = _install_pool(monkeypatch, [])  # zero cursori — orice apel ⇒ AssertionError
    _install_schema(monkeypatch)

    res = await lookup_service.LookupService.search_parteneri("a", 167)
    assert res == []
    assert pool.call_count == 0


async def test_search_parteneri_escapes_like_wildcards(monkeypatch):
    """%, _, \\ trebuie escape-uite înainte de a fi trimise în LIKE."""
    cursor = _FakeCursor(fetchall_rows=[])
    _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    await lookup_service.LookupService.search_parteneri("foo%bar_baz", 167)

    # cursor.execute(query, {"q": ...}) — verificăm al doilea pozițional
    args, _kwargs = cursor.execute.call_args
    assert args[1] == {"q": "foo\\%bar\\_baz%"}, (
        f"Expected escaped LIKE arg; got {args[1]!r}"
    )


async def test_search_parteneri_escapes_backslash_first(monkeypatch):
    """Ordinea escape-ului: \\ se face prima, ca să nu dublezi escape-urile %/_ ulterioare."""
    cursor = _FakeCursor(fetchall_rows=[])
    _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    await lookup_service.LookupService.search_parteneri("a\\b", 167)

    args, _ = cursor.execute.call_args
    # 'a\\b' (3 chars: a, \, b) → 'a\\\\b' (a, \, \, b) + '%'
    assert args[1] == {"q": "a\\\\b%"}


async def test_search_parteneri_returns_results(monkeypatch):
    """Happy path: query trimis cu suffix '%', rezultate mapate la PartenerItem."""
    cursor = _FakeCursor(fetchall_rows=[
        (4321, "POPESCU IMPEX SRL"),
        (4322, "POPESCU SERVICE"),
    ])
    _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    res = await lookup_service.LookupService.search_parteneri("pop", 167)

    args, _ = cursor.execute.call_args
    assert args[1] == {"q": "pop%"}
    assert len(res) == 2
    assert res[0].id_part == 4321
    assert res[0].denumire == "POPESCU IMPEX SRL"


# ============================================================
# get_masina_details — None pentru row lipsă
# ============================================================

async def test_masina_details_returns_none_when_row_missing(monkeypatch):
    """Row inexistent → None (nu raise)."""
    cursor = _FakeCursor(fetchone_row=None)
    _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    res = await lookup_service.LookupService.get_masina_details(99999, 167)
    assert res is None


async def test_masina_details_maps_row_to_pydantic(monkeypatch):
    """Row complet → MasinaDetails cu toate câmpurile populate."""
    cursor = _FakeCursor(fetchone_row=(
        101, "B-32-CTL", "DACIA", "LOGAN", 2018, "ION ION SRL",
        "UU1LSDA8N12345678", 1461, 90, 66,
    ))
    _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    res = await lookup_service.LookupService.get_masina_details(101, 167)
    assert res is not None
    assert res.id_masiniclient == 101
    assert res.nr_inmatriculare == "B-32-CTL"
    assert res.marca == "DACIA"
    assert res.model == "LOGAN"
    assert res.serie_sasiu == "UU1LSDA8N12345678"
    assert res.cilindree == 1461
    assert res.putere_cp == 90
    assert res.putere_kw == 66
    assert res.client_nume == "ION ION SRL"
    assert "DACIA LOGAN" in res.label


# ============================================================
# server_id propagation
# ============================================================

async def test_server_id_propagated_to_pool(monkeypatch):
    """server_id din JWT trebuie să ajungă la oracle_pool.get_connection."""
    cursor = _FakeCursor(fetchall_rows=[])
    pool = _install_pool(monkeypatch, [cursor])
    _install_schema(monkeypatch)

    await lookup_service.LookupService.get_tip_deviz(167, server_id="mariusm_test")

    assert pool.server_ids == ["mariusm_test"]