"""
Tests for Stage 78 — Pydantic request body validation.

Before Stage 78, every POST/PUT route did ad-hoc dict.get() checks
in the handler. Wrong-TYPE fields hit the handler and either
crashed with 500 or coerced silently. Now bodies validate at the
API boundary with proper 422 + field-level errors.

This file tests the VALIDATION layer specifically — that 422
fires on the right shapes, with the right field paths in the
detail. The happy-path behavior is covered by the existing
per-route test files (test_infra_api_webhooks.py, schedules,
admin_actions, etc.).

The contract (FastAPI default):
  - 422 status code
  - body shape: {"detail": [{"loc": [...], "msg": ..., "type": ...}, ...]}
  - "loc" path includes "body" then the field name
"""
import pytest

pytest.importorskip("fastapi")
pytest.importorskip("httpx")
from fastapi.testclient import TestClient

from infra import OrgStateService
from infra.api import create_app


def _bootstrap(tmp_path):
    dbfile = str(tmp_path / "pyd.sqlite3")
    svc = OrgStateService(dbfile)
    try:
        svc.register_tenant("acme", "ACME")
        keys = {
            "admin": svc.create_admin_key().raw,
            "acme_op": svc.create_api_key("acme", role="operator").raw,
            "acme_admin": svc.create_api_key("acme", role="admin").raw,
        }
    finally:
        svc.close()
    return dbfile, keys


def _client(dbfile):
    return TestClient(create_app(dbfile))


def _auth(k):
    return {"Authorization": f"Bearer {k}"}


def _field_in_errors(body: dict, field: str) -> bool:
    """Helper: does any error in body['detail'] reference `field`?"""
    return any(field in err.get("loc", []) for err in body.get("detail", []))


# --- TenantRegisterBody ---------------------------------------------

def test_tenants_post_missing_tenant_id_422(tmp_path):
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/tenants", headers=_auth(keys["admin"]),
                     json={"name": "X"})
    assert r.status_code == 422
    assert _field_in_errors(r.json(), "tenant_id")


def test_tenants_post_empty_tenant_id_422(tmp_path):
    """min_length=1 catches empty string."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/tenants", headers=_auth(keys["admin"]),
                     json={"tenant_id": "", "name": "X"})
    assert r.status_code == 422


def test_tenants_post_wrong_type_422(tmp_path):
    """tenant_id must be str, not int."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/tenants", headers=_auth(keys["admin"]),
                     json={"tenant_id": 12345, "name": "X"})
    # pydantic strict mode would 422; lax mode coerces. We're in
    # default mode which coerces int->str. Either is acceptable
    # here — what we DO want is no crash and a 2xx or 422.
    assert r.status_code in (201, 422)


def test_tenants_post_default_vertical_filled(tmp_path):
    """Omitting `vertical` shouldn't reject — schema has default
    'logistics'."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/tenants", headers=_auth(keys["admin"]),
                     json={"tenant_id": "new", "name": "New"})
    assert r.status_code == 201


# --- ScheduleCreateBody ---------------------------------------------

def test_schedule_bad_frequency_caught_by_model(tmp_path):
    """model_post_init validates frequency ∈ {hourly,daily,weekly}."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/tenants/acme/schedules",
        headers=_auth(keys["acme_op"]),
        json={"vertical": "logistics", "entity_type": "warehouse",
              "connector_type": "csv_folder", "frequency": "centennial"},
    )
    assert r.status_code == 422


def test_schedule_enabled_must_be_bool(tmp_path):
    """`enabled` is typed bool; a string '1' is rejected (str-coerce
    is disabled for bool fields in Pydantic v2 by default for safety)."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/tenants/acme/schedules",
        headers=_auth(keys["acme_op"]),
        json={"vertical": "logistics", "entity_type": "warehouse",
              "connector_type": "csv_folder",
              "enabled": "yes-please"},
    )
    assert r.status_code == 422
    assert _field_in_errors(r.json(), "enabled")


def test_schedule_connector_config_must_be_object(tmp_path):
    """connector_config: Dict[str, Any] — a list is rejected."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/tenants/acme/schedules",
        headers=_auth(keys["acme_op"]),
        json={"vertical": "logistics", "entity_type": "warehouse",
              "connector_type": "csv_folder",
              "connector_config": ["this", "should", "be", "an", "object"]},
    )
    assert r.status_code == 422


# --- ApiKeyMintBody --------------------------------------------------

def test_api_key_invalid_role_422(tmp_path):
    """model_post_init validates role ∈ {admin,operator,readonly}."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/tenants/acme/api_keys",
        headers=_auth(keys["acme_admin"]),
        json={"role": "superuser"},
    )
    assert r.status_code == 422


def test_api_key_typo_in_role_caught(tmp_path):
    """The user-facing win: 'oprator' (typo) → 422, not silently
    minting an admin key (the old default)."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/tenants/acme/api_keys",
        headers=_auth(keys["acme_admin"]),
        json={"role": "oprator"},
    )
    assert r.status_code == 422


def test_api_key_defaults_when_body_empty(tmp_path):
    """Empty body → default role='admin', name=''. No validation
    error — these defaults exist for the bootstrap workflow."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/tenants/acme/api_keys",
        headers=_auth(keys["acme_admin"]),
        json={},
    )
    assert r.status_code == 201
    assert r.json()["role"] == "admin"


# --- WebhookCreateBody ----------------------------------------------

def test_webhook_url_required_422(tmp_path):
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/tenants/acme/webhooks",
                     headers=_auth(keys["acme_op"]), json={})
    assert r.status_code == 422
    assert _field_in_errors(r.json(), "url")


def test_webhook_secret_optional(tmp_path):
    """Omitting secret is valid — webhook fires unsigned."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/tenants/acme/webhooks",
                     headers=_auth(keys["acme_op"]),
                     json={"url": "https://hooks.slack.com/x"})
    assert r.status_code == 201


def test_webhook_secret_must_be_str_not_dict(tmp_path):
    """A common copy-paste mistake."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/tenants/acme/webhooks",
                     headers=_auth(keys["acme_op"]),
                     json={"url": "https://hooks.slack.com/x",
                            "secret": {"value": "shh"}})
    assert r.status_code == 422


# --- CalibrateBody / RunAnalysisBody --------------------------------

def test_calibrate_observations_empty_list_422(tmp_path):
    """min_length=1 on observations — empty list isn't calibratable."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/tenants/acme/calibrations",
        headers=_auth(keys["acme_op"]),
        json={"vertical": "logistics", "entity_type": "warehouse",
              "observations": []},
    )
    assert r.status_code == 422


def test_calibrate_observation_missing_entity_id_422(tmp_path):
    """ObservationModel.entity_id required."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/tenants/acme/calibrations",
        headers=_auth(keys["acme_op"]),
        json={"vertical": "logistics", "entity_type": "warehouse",
              "observations": [{"day": "2026-05-17",
                                  "values": {"orders": 100}}]},
    )
    assert r.status_code == 422


def test_calibrate_observation_values_must_be_object_not_list(tmp_path):
    """values: Dict[str, Any] — list rejected."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/tenants/acme/calibrations",
        headers=_auth(keys["acme_op"]),
        json={"vertical": "logistics", "entity_type": "warehouse",
              "observations": [{"entity_id": "w1", "day": "2026-05-17",
                                  "values": [1, 2, 3]}]},
    )
    assert r.status_code == 422


# --- TenantOverridesBody --------------------------------------------

def test_overrides_severity_must_be_object(tmp_path):
    """Already covered in overrides test file, replicated here
    for symmetry with the Stage 78 grouping."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.put(
        "/admin/tenants/acme/overrides/warehouse",
        headers=_auth(keys["admin"]),
        json={"severity_thresholds": 42},
    )
    assert r.status_code == 422


def test_overrides_drift_weights_must_be_numbers(tmp_path):
    """Dict[str, float] catches string values."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.put(
        "/admin/tenants/acme/overrides/warehouse",
        headers=_auth(keys["admin"]),
        json={"drift_weights": {"delta": "not-a-number"}},
    )
    assert r.status_code == 422


def test_overrides_all_optional_empty_body_ok(tmp_path):
    """Both fields optional → empty body should be accepted by
    Pydantic. Service-layer may complain but not the schema."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.put(
        "/admin/tenants/acme/overrides/warehouse",
        headers=_auth(keys["admin"]),
        json={},
    )
    # service-layer may still 400 (e.g. "no overrides to apply"),
    # but NOT a Pydantic 422
    assert r.status_code != 422


# --- AdminRecalibrateBody -------------------------------------------

def test_recalibrate_min_observations_must_be_positive(tmp_path):
    """ge=1 on min_observations."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/admin/tenants/acme/recalibrate",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse", "min_observations": 0},
    )
    assert r.status_code == 422


def test_recalibrate_min_observations_default_used(tmp_path):
    """Default 14 applied if omitted; not a validation error."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/admin/tenants/acme/recalibrate",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse"},
    )
    # service may 400 (no observations to recalibrate from) but
    # NOT 422 — defaults applied successfully
    assert r.status_code != 422


# --- error response shape --------------------------------------------

def test_422_response_shape_has_loc_and_msg(tmp_path):
    """Verify the field-level error contract: every error has a
    `loc` path and a `msg`. This is what enables a customer
    dashboard to display 'url is required' next to the right
    input field."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/tenants/acme/webhooks",
                     headers=_auth(keys["acme_op"]), json={})
    assert r.status_code == 422
    body = r.json()
    assert "detail" in body
    assert isinstance(body["detail"], list)
    assert len(body["detail"]) >= 1
    err = body["detail"][0]
    assert "loc" in err
    assert "msg" in err
    # loc should mention the field path so UIs can route the error
    assert any("url" in part for part in err["loc"] if isinstance(part, str))


def test_422_field_level_errors_multiple(tmp_path):
    """Two missing fields → two errors, one per field. Customer
    can fix everything in one round-trip instead of one-at-a-time."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/tenants/acme/schedules",
        headers=_auth(keys["acme_op"]),
        json={},
    )
    assert r.status_code == 422
    body = r.json()
    field_paths = [err["loc"] for err in body["detail"]]
    # vertical + entity_type + connector_type all missing → at
    # least 3 errors
    assert len(body["detail"]) >= 3
    flat = [p for loc in field_paths for p in loc]
    for required in ("vertical", "entity_type", "connector_type"):
        assert required in flat, f"expected error for {required}"