"""
CUI Gate Tests
==============
Unit tests for evaluate_cui_gate() and _record_order_error() in sync_service.

Tests 1-6: pure predicate, no IO.
Test 7: integration — _record_order_error with pre-seeded SQLite IMPORTED row
        verifies COALESCE preserves existing id_partener.

Run:
    cd api && python -m pytest tests/test_sync_cui_gate.py -v
"""

import os
import sys
import tempfile

import pytest

pytestmark = pytest.mark.unit

_tmpdir = tempfile.mkdtemp()
os.environ.setdefault("FORCE_THIN_MODE", "true")
os.environ.setdefault("SQLITE_DB_PATH", os.path.join(_tmpdir, "test_cui_gate.db"))
os.environ.setdefault("ORACLE_DSN", "dummy")
os.environ.setdefault("ORACLE_USER", "dummy")
os.environ.setdefault("ORACLE_PASSWORD", "dummy")
os.environ.setdefault("JSON_OUTPUT_DIR", _tmpdir)

_api_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
if _api_dir not in sys.path:
    sys.path.insert(0, _api_dir)

from app import database
from app.services import sqlite_service
from app.services.sync_service import evaluate_cui_gate, _record_order_error
from app.services.order_reader import OrderBilling, OrderShipping, OrderData, OrderItem
from app.constants import OrderStatus


# ---------------------------------------------------------------------------
# Helpers
# ---------------------------------------------------------------------------

_VALID_ANAF_FOUND = {"scpTVA": True, "denumire_anaf": "NONA ROYAL SRL", "checked_at": "2026-04-22T10:00:00"}
_ANAF_NOT_FOUND   = {"scpTVA": None, "denumire_anaf": "", "checked_at": "2026-04-22T10:00:00"}

# A CUI with valid format and valid checksum (MATTEO&OANA CAFFE 2022 SRL)
_VALID_CUI = "49033051"
# Same body but last digit modified → fails checksum
_BAD_CHECKSUM_CUI = "49033052"
# J-format — the incident CUI (registru number in the CUI field)
_J_FORMAT = "J1994000194225"


def _make_pj_order(company_code=_VALID_CUI, number="O-001"):
    billing = OrderBilling(
        firstname="Ion", lastname="Pop", phone="0700", email="x@x.ro",
        address="Str A 1", city="Cluj", region="Cluj", country="Romania",
        company_name="TEST SRL", company_code=company_code,
        company_reg="J12/123/2020", is_company=True,
    )
    shipping = OrderShipping(
        firstname="Ion", lastname="Pop", phone="0700", email="x@x.ro",
        address="Str A 1", city="Cluj", region="Cluj", country="Romania",
    )
    return OrderData(
        id=number, number=number, date="2026-04-22",
        billing=billing, shipping=shipping,
        items=[OrderItem(sku="SKU1", name="Prod", price=10.0, quantity=1, vat=19)],
    )


def _make_pf_order(number="O-PF-1"):
    billing = OrderBilling(
        firstname="Ana", lastname="Pop", phone="0700", email="a@x.ro",
        address="Str B 2", city="Iasi", region="Iasi", country="Romania",
        is_company=False,
    )
    shipping = OrderShipping(
        firstname="Ana", lastname="Pop", phone="0700", email="a@x.ro",
        address="Str B 2", city="Iasi", region="Iasi", country="Romania",
    )
    return OrderData(
        id=number, number=number, date="2026-04-22",
        billing=billing, shipping=shipping,
        items=[OrderItem(sku="SKU1", name="Prod", price=10.0, quantity=1, vat=19)],
    )


# ---------------------------------------------------------------------------
# Tests 1-6: pure predicate — no IO
# ---------------------------------------------------------------------------

class TestEvaluateCuiGate:

    def test_format_invalid_incident_case(self):
        """Test 1: J-format in cod_fiscal field (the 22-Apr-2026 incident) → blocked."""
        # bare_cui from sanitize_cui("J1994000194225") = "J1994000194225" (not digits)
        result = evaluate_cui_gate(
            is_ro_company=True,
            company_code_raw=_J_FORMAT,
            bare_cui=_J_FORMAT,
            anaf_data=_VALID_ANAF_FOUND,
        )
        assert result is not None
        assert "format" in result

    def test_checksum_invalid(self):
        """Test 2: valid format, wrong check digit → blocked."""
        result = evaluate_cui_gate(
            is_ro_company=True,
            company_code_raw=_BAD_CHECKSUM_CUI,
            bare_cui=_BAD_CHECKSUM_CUI,
            anaf_data=_VALID_ANAF_FOUND,
        )
        assert result is not None
        assert "cifra de control" in result

    def test_anaf_not_found_explicit(self):
        """Test 3: ANAF explicit notFound → blocked with registry hint."""
        result = evaluate_cui_gate(
            is_ro_company=True,
            company_code_raw=_VALID_CUI,
            bare_cui=_VALID_CUI,
            anaf_data=_ANAF_NOT_FOUND,
        )
        assert result is not None
        assert "nu exista in registrul ANAF" in result
        assert "registrul comertului" in result

    def test_anaf_found_vat_payer_passes(self):
        """Test 4: ANAF found + platitor TVA → pass."""
        result = evaluate_cui_gate(
            is_ro_company=True,
            company_code_raw=_VALID_CUI,
            bare_cui=_VALID_CUI,
            anaf_data=_VALID_ANAF_FOUND,
        )
        assert result is None

    def test_anaf_down_fallback_passes(self):
        """Test 5 [CRITICAL REGRESSION]: ANAF down (anaf_data=None) + valid CUI → pass.

        If this test fails, the gate is breaking the ANAF-down fallback and all
        RO company orders would error when ANAF is unavailable.
        """
        result = evaluate_cui_gate(
            is_ro_company=True,
            company_code_raw=_VALID_CUI,
            bare_cui=_VALID_CUI,
            anaf_data=None,  # ANAF down / transient error
        )
        assert result is None, (
            "ANAF down must NOT block orders — gate must only block on explicit notFound"
        )

    def test_pf_always_passes(self):
        """Test 6: PF order (is_ro_company=False) → always pass, regardless of CUI."""
        result = evaluate_cui_gate(
            is_ro_company=False,
            company_code_raw=_J_FORMAT,
            bare_cui=_J_FORMAT,
            anaf_data=_ANAF_NOT_FOUND,
        )
        assert result is None

    def test_no_company_code_passes(self):
        """PJ without company_code → pass (nothing to validate)."""
        result = evaluate_cui_gate(
            is_ro_company=True,
            company_code_raw=None,
            bare_cui="",
            anaf_data=None,
        )
        assert result is None

    def test_anaf_found_non_vat_passes(self):
        """ANAF found non-platitor TVA (scpTVA=False) → pass."""
        result = evaluate_cui_gate(
            is_ro_company=True,
            company_code_raw=_VALID_CUI,
            bare_cui=_VALID_CUI,
            anaf_data={"scpTVA": False, "denumire_anaf": "FIRMA SRL", "checked_at": "2026-04-22T10:00:00"},
        )
        assert result is None


# ---------------------------------------------------------------------------
# Test 7: integration — COALESCE preserves id_partener on gate block
# ---------------------------------------------------------------------------

@pytest.fixture(autouse=True)
def _init_db():
    database.init_sqlite()


@pytest.mark.asyncio
async def test_record_order_error_preserves_id_partener():
    """Test 7: _record_order_error called with id_partener=None preserves existing id_partener
    via SQLite COALESCE in upsert_order.

    Scenario: order was previously IMPORTED with id_partener=9001.
    At resync the gate blocks it (bad CUI). _record_order_error passes id_partener=None.
    After upsert, the row should have status=ERROR and id_partener=9001 (preserved).
    """
    order = _make_pj_order(company_code=_J_FORMAT, number="O-COALESCE-1")
    run_id = "test-run-coalesce"

    # Seed an existing IMPORTED row with id_partener=9001
    db = await sqlite_service.get_sqlite()
    try:
        await db.execute(
            """INSERT OR REPLACE INTO orders
               (order_number, order_date, customer_name, status, id_partener, items_count)
               VALUES (?, ?, ?, ?, ?, ?)""",
            (order.number, order.date, "TEST SRL", OrderStatus.IMPORTED.value, 9001, 1),
        )
        await db.commit()
    finally:
        await db.close()

    # Gate fires → calls _record_order_error with id_partener=None (gate doesn't know it)
    await _record_order_error(
        run_id=run_id,
        order=order,
        customer="TEST SRL",
        shipping_name="Ion Pop",
        billing_name="TEST SRL",
        payment_method="card",
        delivery_method="curier",
        discount_split_json=None,
        order_items_data=[{
            "sku": "SKU1", "product_name": "Prod", "quantity": 1,
            "price": 10.0, "baseprice": None, "vat": 19,
            "mapping_status": "direct", "codmat": None, "id_articol": None, "cantitate_roa": None,
        }],
        reason=f"CUI invalid (format): {_J_FORMAT!r}",
        id_partener=None,  # gate doesn't have it
    )

    # Verify: status=ERROR, id_partener=9001 (COALESCE preserved), error_message populated
    db = await sqlite_service.get_sqlite()
    try:
        row = await db.execute(
            "SELECT status, id_partener, error_message FROM orders WHERE order_number = ?",
            (order.number,),
        )
        row = await row.fetchone()
    finally:
        await db.close()

    assert row is not None, "Order row missing after _record_order_error"
    assert row[0] == OrderStatus.ERROR.value, f"Expected ERROR, got {row[0]}"
    assert row[1] == 9001, f"Expected id_partener=9001 (preserved by COALESCE), got {row[1]}"
    assert row[2] and "format" in row[2], f"Expected error_message with 'format', got {row[2]!r}"