"""
Order Items Overwrite Regression Tests
========================================
Re-import must replace SQLite order_items (not INSERT OR IGNORE) so quantity
changes in GoMag propagate to the dashboard. Regression for VELA CAFE #484669620.

Also: soft-delete (mark_order_deleted_in_roa) must purge stale items.

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

import os
import sys
import tempfile

import pytest

pytestmark = pytest.mark.unit

# --- Set env vars BEFORE any app import ---
_tmpdir = tempfile.mkdtemp()
_sqlite_path = os.path.join(_tmpdir, "test_items.db")

os.environ.setdefault("FORCE_THIN_MODE", "true")
os.environ.setdefault("SQLITE_DB_PATH", _sqlite_path)
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.constants import OrderStatus


@pytest.fixture(autouse=True)
async def _init_db():
    database.init_sqlite()
    # Clean state before each test
    db = await sqlite_service.get_sqlite()
    try:
        await db.execute("DELETE FROM order_items")
        await db.execute("DELETE FROM sync_run_orders")
        await db.execute("DELETE FROM orders")
        await db.execute("DELETE FROM sync_runs")
        await db.commit()
    finally:
        await db.close()
    yield


def _item(sku="SKU1", qty=1.0, price=10.0):
    return {
        "sku": sku, "product_name": f"Product {sku}",
        "quantity": qty, "price": price, "baseprice": price,
        "vat": 19, "mapping_status": "direct", "codmat": None,
        "id_articol": None, "cantitate_roa": None,
    }


async def _seed_order(order_number="TEST-001"):
    """Create an orders row so FK constraints (if any) pass."""
    await sqlite_service.upsert_order(
        sync_run_id="test-run",
        order_number=order_number,
        order_date="2026-01-01",
        customer_name="Test",
        status=OrderStatus.IMPORTED.value,
    )


async def _items_for(order_number):
    return await sqlite_service.get_order_items(order_number)


# ===========================================================================
# add_order_items — replace semantics
# ===========================================================================

@pytest.mark.asyncio
async def test_add_order_items_deletes_before_insert():
    """Re-import with changed quantities must overwrite, not preserve old rows."""
    await _seed_order("ORD-A")
    # Initial import: 3 items
    await sqlite_service.add_order_items("ORD-A", [
        _item("SKU1", qty=5), _item("SKU2", qty=10), _item("SKU3", qty=2),
    ])
    rows = await _items_for("ORD-A")
    assert len(rows) == 3

    # Re-import: only 2 items, different quantities (simulates user edit in GoMag)
    await sqlite_service.add_order_items("ORD-A", [
        _item("SKU1", qty=99), _item("SKU4", qty=1),
    ])
    rows = await _items_for("ORD-A")
    skus = {r["sku"]: r["quantity"] for r in rows}
    assert skus == {"SKU1": 99, "SKU4": 1}, f"old rows leaked: {skus}"


@pytest.mark.asyncio
async def test_add_order_items_empty_list_no_delete():
    """Empty list is a no-op — existing items must remain (early return)."""
    await _seed_order("ORD-B")
    await sqlite_service.add_order_items("ORD-B", [_item("SKU1", qty=5)])
    await sqlite_service.add_order_items("ORD-B", [])  # should not wipe
    rows = await _items_for("ORD-B")
    assert len(rows) == 1
    assert rows[0]["sku"] == "SKU1"


@pytest.mark.asyncio
async def test_add_order_items_isolation_between_orders():
    """add_order_items on ORD-A must not affect ORD-B items."""
    await _seed_order("ORD-A")
    await _seed_order("ORD-B")
    await sqlite_service.add_order_items("ORD-A", [_item("SKU1", qty=5)])
    await sqlite_service.add_order_items("ORD-B", [_item("SKU2", qty=7)])
    # Re-import A
    await sqlite_service.add_order_items("ORD-A", [_item("SKU1", qty=99)])
    rows_a = await _items_for("ORD-A")
    rows_b = await _items_for("ORD-B")
    assert len(rows_a) == 1 and rows_a[0]["quantity"] == 99
    assert len(rows_b) == 1 and rows_b[0]["quantity"] == 7


# ===========================================================================
# save_orders_batch — replace semantics for batch flow
# ===========================================================================

@pytest.mark.asyncio
async def test_save_orders_batch_overwrite():
    """save_orders_batch must also replace existing items for re-run order numbers."""
    await _seed_order("ORD-BATCH")
    await sqlite_service.add_order_items("ORD-BATCH", [
        _item("SKU_OLD", qty=1),
    ])
    assert len(await _items_for("ORD-BATCH")) == 1

    batch = [{
        "sync_run_id": "run-1",
        "order_number": "ORD-BATCH",
        "status_at_run": "PENDING",
        "order_date": "2026-01-02",
        "customer_name": "Batch",
        "status": "PENDING",
        "items": [_item("SKU_NEW_1", qty=3), _item("SKU_NEW_2", qty=4)],
    }]
    # save_orders_batch requires sync_runs row first
    db = await sqlite_service.get_sqlite()
    try:
        await db.execute(
            "INSERT OR IGNORE INTO sync_runs (run_id, started_at, status) VALUES (?, datetime('now'), 'running')",
            ("run-1",),
        )
        await db.commit()
    finally:
        await db.close()

    await sqlite_service.save_orders_batch(batch)
    rows = await _items_for("ORD-BATCH")
    skus = {r["sku"] for r in rows}
    assert skus == {"SKU_NEW_1", "SKU_NEW_2"}, f"old items leaked: {skus}"


# ===========================================================================
# mark_order_deleted_in_roa — preserves items so detail view stays useful
# ===========================================================================

@pytest.mark.asyncio
async def test_mark_order_deleted_preserves_items():
    """Soft-delete keeps order_items so the detail view shows what was ordered.

    On 'Reimporta', add_order_items replaces them (DELETE+INSERT inside _safe_upsert_order_items).
    """
    await _seed_order("ORD-DEL")
    await sqlite_service.add_order_items("ORD-DEL", [
        _item("SKU1", qty=5), _item("SKU2", qty=3),
    ])
    assert len(await _items_for("ORD-DEL")) == 2

    await sqlite_service.mark_order_deleted_in_roa("ORD-DEL")

    # Items preserved — detail view can still display them alongside "Comanda stearsa din ROA"
    items = await _items_for("ORD-DEL")
    assert len(items) == 2
    assert {i["sku"] for i in items} == {"SKU1", "SKU2"}

    # Orders row still present with DELETED_IN_ROA status (not hard-deleted)
    db = await sqlite_service.get_sqlite()
    try:
        cur = await db.execute("SELECT status, id_comanda FROM orders WHERE order_number = ?", ("ORD-DEL",))
        row = await cur.fetchone()
    finally:
        await db.close()
    assert row is not None
    assert row["status"] == OrderStatus.DELETED_IN_ROA.value
    assert row["id_comanda"] is None