from fastapi.testclient import TestClient

from app.core.database import SessionLocal
from app.models.finished_goods import FinishedGoodsLocation


def test_register_location_success(client: TestClient):
    """正常上架 — 应返回 200"""
    resp = client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26B999", "location_code": "A01-02-03"},
    )
    assert resp.status_code == 200
    data = resp.json()
    assert data["zongpai_no"] == "26B999"
    assert data["location_code"] == "A01-02-03"


def test_register_location_duplicate_normal_to_normal(client: TestClient):
    """普通货位重复上架到普通货位 — 应返回 DUPLICATE_LOCATION"""
    client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26C999", "location_code": "A01-02-03"},
    )
    resp = client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26C999", "location_code": "A02-01-01"},
    )
    assert resp.status_code == 409
    data = resp.json()
    assert data["error_code"] == "DUPLICATE_LOCATION"
    assert data["location_code"] == "A01-02-03"
    assert "registered_at" in data


def test_register_location_normal_to_transit_updates_record(client: TestClient):
    """普通货位下架到转运货位 — 应更新记录并返回 previous_location"""
    client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26T998", "location_code": "A01-02-03"},
    )
    resp = client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26T998", "location_code": "TRANS-01"},
    )
    assert resp.status_code == 200
    data = resp.json()
    assert data["zongpai_no"] == "26T998"
    assert data["location_code"] == "TRANS-01"
    assert data["previous_location"] == "A01-02-03"

    db = SessionLocal()
    try:
        record = (
            db.query(FinishedGoodsLocation)
            .filter(FinishedGoodsLocation.zongpai_no == "26T998")
            .first()
        )
        assert record is not None
        assert record.location_code == "TRANS-01"
    finally:
        db.close()


def test_register_location_transit_to_normal_rejected(client: TestClient):
    """已下架后再上架到普通货位 — 应返回 ALREADY_OFF_SHELF"""
    client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26B998", "location_code": "TRANS-01"},
    )
    resp = client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26B998", "location_code": "A01-02-03"},
    )
    assert resp.status_code == 409
    data = resp.json()
    assert data["error_code"] == "ALREADY_OFF_SHELF"
    assert data["message"] == "该总排号已下架至转运区域，不可重新上架"
    assert data["location_code"] == "TRANS-01"
    assert "registered_at" in data


def test_register_location_transit_to_transit_rejected(client: TestClient):
    """已下架后再提交转运货位 — 应返回 ALREADY_OFF_SHELF"""
    client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26C998", "location_code": "TRANS-01"},
    )
    resp = client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26C998", "location_code": "TRANS-02"},
    )
    assert resp.status_code == 409
    data = resp.json()
    assert data["error_code"] == "ALREADY_OFF_SHELF"
    assert data["location_code"] == "TRANS-01"


def test_register_location_invalid_zongpai(client: TestClient):
    """无效总排号 — 应返回 400"""
    resp = client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "INVALID", "location_code": "A01-02-03"},
    )
    assert resp.status_code == 400
    assert resp.json()["error_code"] == "INVALID_ZONGPAI"


def test_register_location_invalid_location(client: TestClient):
    """无效货位号 — 应返回 400"""
    resp = client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26T999", "location_code": "bad-location"},
    )
    assert resp.status_code == 400
    assert resp.json()["error_code"] == "INVALID_LOCATION"


def test_register_location_trans_location(client: TestClient):
    """转运特殊货位 — 应返回 200"""
    resp = client.post(
        "/CargoTrace/location",
        json={"zongpai_no": "26BW0999", "location_code": "TRANS-01"},
    )
    assert resp.status_code == 200
    assert resp.json()["location_code"] == "TRANS-01"