"""Envelope + camelCase renderer (API-STANDARD.md §3, §4)."""

import json

from infrasynth.api.renderers import EnvelopeJSONRenderer


class _FakeRequest:
    def __init__(self, request_id="req_1", tenant=None):
        self.request_id = request_id
        self.tenant = tenant


class _FakeResponse:
    def __init__(self, status_code=200):
        self.status_code = status_code


def _render(data, *, status=200, request=None, response=None):
    renderer = EnvelopeJSONRenderer()
    raw = renderer.render(
        data,
        renderer_context={"request": request or _FakeRequest(), "response": response or _FakeResponse(status)},
    )
    return json.loads(raw)


def test_success_envelope_camelcases_data():
    body = _render({"first_name": "Ada", "nested": {"last_name": "L"}})
    assert body["success"] is True
    assert body["error"] is None
    assert body["data"] == {"firstName": "Ada", "nested": {"lastName": "L"}}
    assert body["meta"]["requestId"] == "req_1"
    assert body["meta"]["timestamp"].endswith("Z")


def test_error_envelope_uses_error_member():
    body = _render(
        {"code": "ENTITLEMENT_EXPIRED", "message": "expired", "details": []},
        status=402,
    )
    assert body["success"] is False
    assert body["data"] is None
    assert body["error"]["code"] == "ENTITLEMENT_EXPIRED"


def test_paginated_response_moves_results_to_data():
    payload = {
        "next": "cursor_next",
        "previous": None,
        "page_size": 25,
        "results": [{"id": 1}, {"id": 2}],
    }
    body = _render(payload)
    assert body["data"] == [{"id": 1}, {"id": 2}]
    assert body["meta"]["pagination"] == {"nextCursor": "cursor_next", "prevCursor": None, "pageSize": 25}


def test_meta_includes_tenant_id_when_resolved():
    class _Tenant:
        pk = "11111111-1111-1111-1111-111111111111"

    body = _render({"ok": True}, request=_FakeRequest(tenant=_Tenant()))
    assert body["meta"]["tenantId"] == "11111111-1111-1111-1111-111111111111"