"""
Route-level tests for the /admin/keys endpoints against the real,
Postgres-backed UsageTracker -- these routes are normally exercised through
the module-level `tracker` singleton (conftest.py replaces it globally with
MockTracker for every other test), so `tracker` is patched on
`app.core.usage_tracker` and `ADMIN_API_KEY` on `app.api.routes_admin` for
the duration of this module.

`tracker` is patched on the *defining* module, not on routes_admin, because
routes_admin no longer holds its own binding: it reaches the singleton
through `usage_tracker.tracker` so that init_tracker()'s rebinding is
visible to it. That is also what makes one patch here sufficient where five
would otherwise be needed.

This is the main regression coverage for the api_keys-on-Postgres
migration: it exercises the exact raw SQL routes_admin.py runs against
`usage_tracker.tracker._get_pg_conn()`.
"""
import hashlib
import hmac
import os

import pytest

from app.core import usage_tracker
from app.core.usage_tracker import UsageTracker
import app.api.routes_admin as routes_admin

TEST_ADMIN_KEY = "test-admin-key-for-routes-admin-tests"
TEST_PEPPER = os.environ["ARF_KEY_PEPPER"]  # set in conftest.py before app import


def _key_id(raw_key: str) -> str:
    """Reproduce UsageTracker._lookup_hash without a tracker instance, so
    tests can locate the row created for a given raw key deterministically."""
    return hmac.new(TEST_PEPPER.encode(), raw_key.encode(), hashlib.sha256).hexdigest()


@pytest.fixture(autouse=True)
def real_tracker(monkeypatch):
    real = UsageTracker(db_path=":memory:")
    monkeypatch.setattr(usage_tracker, "tracker", real)
    monkeypatch.setattr(routes_admin, "ADMIN_API_KEY", TEST_ADMIN_KEY)
    yield real


def test_create_list_update_deactivate_key(client):
    create_resp = client.post(
        "/api/v1/admin/keys",
        params={"admin_key": TEST_ADMIN_KEY},
        json={"tier": "free", "org_name": "Test Org"},
    )
    assert create_resp.status_code == 200
    body = create_resp.json()
    api_key = body["api_key"]
    assert body["tier"] == "free"
    key_id = _key_id(api_key)

    list_resp = client.get("/api/v1/admin/keys", params={"admin_key": TEST_ADMIN_KEY})
    assert list_resp.status_code == 200
    keys_by_id = {row["key_id"]: row for row in list_resp.json()["keys"]}
    assert key_id in keys_by_id
    assert keys_by_id[key_id]["tier"] == "free"
    assert keys_by_id[key_id]["is_active"] is True

    patch_resp = client.patch(
        f"/api/v1/admin/keys/{key_id}/tier",
        params={"admin_key": TEST_ADMIN_KEY},
        json={"tier": "pro"},
    )
    assert patch_resp.status_code == 200

    list_resp2 = client.get("/api/v1/admin/keys", params={"admin_key": TEST_ADMIN_KEY})
    assert list_resp2.json()["keys"][0]  # non-empty, sanity check
    keys_by_id2 = {row["key_id"]: row for row in list_resp2.json()["keys"]}
    assert keys_by_id2[key_id]["tier"] == "pro"

    delete_resp = client.delete(f"/api/v1/admin/keys/{key_id}", params={"admin_key": TEST_ADMIN_KEY})
    assert delete_resp.status_code == 200

    list_resp3 = client.get("/api/v1/admin/keys", params={"admin_key": TEST_ADMIN_KEY})
    keys_by_id3 = {row["key_id"]: row for row in list_resp3.json()["keys"]}
    assert keys_by_id3[key_id]["is_active"] is False


def test_update_nonexistent_key_returns_404(client):
    resp = client.patch(
        "/api/v1/admin/keys/does-not-exist/tier",
        params={"admin_key": TEST_ADMIN_KEY},
        json={"tier": "pro"},
    )
    assert resp.status_code == 404


def test_rotate_key_deactivates_old_and_creates_new_on_same_tenant(client):
    create_resp = client.post(
        "/api/v1/admin/keys",
        params={"admin_key": TEST_ADMIN_KEY},
        json={"tier": "pro", "org_name": "Rotate Test Org"},
    )
    assert create_resp.status_code == 200
    old_body = create_resp.json()
    old_key_id = _key_id(old_body["api_key"])
    tenant_id = old_body["tenant_id"]

    rotate_resp = client.post(
        f"/api/v1/admin/keys/{old_key_id}/rotate", params={"admin_key": TEST_ADMIN_KEY})
    assert rotate_resp.status_code == 200
    rotated = rotate_resp.json()
    assert rotated["tenant_id"] == tenant_id
    assert rotated["tier"] == "pro"
    assert rotated["deactivated_key_id"] == old_key_id
    new_key_id = _key_id(rotated["api_key"])
    assert new_key_id != old_key_id

    list_resp = client.get("/api/v1/admin/keys", params={"admin_key": TEST_ADMIN_KEY})
    keys_by_id = {row["key_id"]: row for row in list_resp.json()["keys"]}
    assert keys_by_id[old_key_id]["is_active"] is False
    assert keys_by_id[new_key_id]["is_active"] is True
    assert keys_by_id[new_key_id]["tier"] == "pro"


def test_rotate_nonexistent_key_returns_404(client):
    resp = client.post(
        "/api/v1/admin/keys/does-not-exist/rotate", params={"admin_key": TEST_ADMIN_KEY})
    assert resp.status_code == 404