"""
Tests for Stage 55 — admin recalibrate + run trigger HTTP.

  POST /admin/tenants/{tid}/recalibrate
  POST /admin/tenants/{tid}/runs/trigger

Existing tenant routes (/tenants/{tid}/calibrations, /runs) require
a tenant API key with operator role. Admin keys cannot call them
because auth_dep is rigid about tenant ApiKey. Stage 55 fills the
gap so admin dashboards can drive the fix-it loop without needing
to hold a tenant credential.

vertical is inferred from the tenant's registered vertical, so the
admin only passes entity_type in the body.
"""
from datetime import datetime, timedelta, timezone

import pytest

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

from infra import OrgStateService
from infra.api import create_app


def _seed_tenant_with_observations(dbfile, tenant_id="acme",
                                     n_days=20):
    """Register a logistics tenant and push 20 days of observations,
    then calibrate via the service (so trigger has a calibration
    to work with — recalibrate doesn't need one)."""
    from verticals import get_vertical_config
    svc = OrgStateService(dbfile)
    try:
        svc.register_tenant(tenant_id, tenant_id, vertical="logistics")
        cfg = get_vertical_config("logistics").entity_type("warehouse")
        base = datetime(2026, 1, 1, tzinfo=timezone.utc)
        rows = []
        for d in range(n_days):
            for eid in ("wh_a", "wh_b"):
                values = {m.name: 100.0 + d for m in cfg.metrics}
                rows.append({
                    "entity_id": eid,
                    "day": (base + timedelta(days=d)).date().isoformat(),
                    "values": values,
                })
        svc.observations.upsert_batch(tenant_id, "warehouse", rows)
    finally:
        svc.close()


def _bootstrap(tmp_path):
    dbfile = str(tmp_path / "admin_actions.sqlite3")
    _seed_tenant_with_observations(dbfile, "acme")
    svc = OrgStateService(dbfile)
    try:
        keys = {
            "admin": svc.create_admin_key().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}"}


# --- POST /admin/tenants/{tid}/recalibrate ---------------------------

def test_recalibrate_happy_path_returns_summary(tmp_path):
    """Admin POST → svc.recalibrate_from_stored runs → returns the
    same summary shape as Stage 30 (previous_age_days etc.)."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/admin/tenants/acme/recalibrate",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse"},
    )
    assert r.status_code == 200
    body = r.json()
    assert body["tenant_id"] == "acme"
    assert body["entity_type"] == "warehouse"
    assert body["vertical"] == "logistics"
    assert body["n_observations_used"] == 40   # 20 days × 2 entities
    assert body["new_derived_at"]


def test_recalibrate_persists_calibration(tmp_path):
    """End-to-end: HTTP call writes a calibration row that the
    service can load afterwards."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    assert client.post(
        "/admin/tenants/acme/recalibrate",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse"},
    ).status_code == 200
    svc = OrgStateService(dbfile)
    try:
        assert svc.get_calibration("acme", "warehouse") is not None
    finally:
        svc.close()


def test_recalibrate_too_few_observations_returns_400(tmp_path):
    """Service-layer guardrail surfaces as 400, not 500 — caller
    fixed-able by lowering --min-observations or pushing more data."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    # 14 is default; ask for 9999 to force the guardrail
    r = client.post(
        "/admin/tenants/acme/recalibrate",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse", "min_observations": 9999},
    )
    assert r.status_code == 400


def test_recalibrate_missing_entity_type_400(tmp_path):
    """Stage 78: Pydantic 422 with field-level error."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/admin/tenants/acme/recalibrate",
                     headers=_auth(keys["admin"]),
                     json={})
    assert r.status_code == 422


def test_recalibrate_unknown_tenant_404(tmp_path):
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/admin/tenants/ghost/recalibrate",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse"},
    )
    assert r.status_code == 404


def test_recalibrate_unknown_entity_type_404(tmp_path):
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/admin/tenants/acme/recalibrate",
        headers=_auth(keys["admin"]),
        json={"entity_type": "ghost"},
    )
    assert r.status_code == 404


def test_recalibrate_writes_audit_entry_with_admin_actor(tmp_path):
    dbfile, keys = _bootstrap(tmp_path)
    _client(dbfile).post(
        "/admin/tenants/acme/recalibrate",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse"},
    )
    svc = OrgStateService(dbfile)
    try:
        rows = svc.audit.list(action="recalibrate")
        assert len(rows) == 1
        assert rows[0]["tenant_id"] == "acme"
        assert rows[0]["actor"]   # admin actor string is set
    finally:
        svc.close()


def test_recalibrate_no_admin_key_401(tmp_path):
    dbfile, _ = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/admin/tenants/acme/recalibrate",
                     json={"entity_type": "warehouse"})
    assert r.status_code == 401


def test_recalibrate_tenant_key_forbidden(tmp_path):
    """A tenant key — even role=admin on its own tenant — must not
    be able to call /admin/ routes. Otherwise the admin/tenant
    privilege boundary is gone."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/admin/tenants/acme/recalibrate",
        headers=_auth(keys["acme_admin"]),
        json={"entity_type": "warehouse"},
    )
    assert r.status_code in (401, 403)


# --- POST /admin/tenants/{tid}/runs/trigger --------------------------

def test_trigger_happy_path_returns_run_handle(tmp_path):
    dbfile, keys = _bootstrap(tmp_path)
    # recalibrate first so a calibration exists
    client = _client(dbfile)
    client.post("/admin/tenants/acme/recalibrate",
                 headers=_auth(keys["admin"]),
                 json={"entity_type": "warehouse"})

    r = client.post(
        "/admin/tenants/acme/runs/trigger",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse"},
    )
    assert r.status_code == 200
    body = r.json()
    assert body["run_id"].startswith("run_")
    assert body["tenant_id"] == "acme"
    assert body["entity_type"] == "warehouse"
    assert "n_issues" in body


def test_trigger_persists_run_row(tmp_path):
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    client.post("/admin/tenants/acme/recalibrate",
                 headers=_auth(keys["admin"]),
                 json={"entity_type": "warehouse"})
    rid = client.post(
        "/admin/tenants/acme/runs/trigger",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse"},
    ).json()["run_id"]
    svc = OrgStateService(dbfile)
    try:
        assert svc.get_run(rid) is not None
    finally:
        svc.close()


def test_trigger_no_calibration_returns_400(tmp_path):
    """run_from_stored raises CalibrationNotFound. Handler maps it
    to 400 (caller-fixable by recalibrate first) — NOT 500. The
    admin's response is "POST /admin/tenants/X/recalibrate, retry",
    not "page someone for a server error"."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    # no recalibrate first → no calibration
    r = client.post(
        "/admin/tenants/acme/runs/trigger",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse"},
    )
    assert r.status_code == 400
    assert "calibration" in r.json()["error"]["message"].lower()


def test_trigger_missing_entity_type_400(tmp_path):
    """Stage 78: Pydantic 422 with field-level error."""
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/admin/tenants/acme/runs/trigger",
                     headers=_auth(keys["admin"]),
                     json={})
    assert r.status_code == 422


def test_trigger_unknown_tenant_404(tmp_path):
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/admin/tenants/ghost/runs/trigger",
        headers=_auth(keys["admin"]),
        json={"entity_type": "warehouse"},
    )
    assert r.status_code == 404


def test_trigger_no_admin_key_401(tmp_path):
    dbfile, _ = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post("/admin/tenants/acme/runs/trigger",
                     json={"entity_type": "warehouse"})
    assert r.status_code == 401


def test_trigger_tenant_key_forbidden(tmp_path):
    dbfile, keys = _bootstrap(tmp_path)
    client = _client(dbfile)
    r = client.post(
        "/admin/tenants/acme/runs/trigger",
        headers=_auth(keys["acme_admin"]),
        json={"entity_type": "warehouse"},
    )
    assert r.status_code in (401, 403)