"""Tests intégration HTTP de POST /api/v1/dialog/resolve — R2 MVP P0.

Vérifie :
- flag OFF par défaut → 503.
- flag ON + match catalogue → 200 + payload conforme.
- flag ON + pas de match → 200 + matched=False + policy=pause.
"""

from __future__ import annotations

import sys
from pathlib import Path

import pytest


_ROOT = str(Path(__file__).resolve().parents[2])
if _ROOT not in sys.path:
    sys.path.insert(0, _ROOT)


pytestmark = pytest.mark.integration


_TEST_API_TOKEN = "test_dialog_resolver_endpoint_token"


@pytest.fixture
def client(monkeypatch):
    """TestClient FastAPI avec token. Le flag RPA_DIALOG_RESOLVER_ENABLED
    est géré par chaque test (par défaut absent → 503)."""
    monkeypatch.setenv("RPA_API_TOKEN", _TEST_API_TOKEN)

    from fastapi.testclient import TestClient
    from agent_v0.server_v1 import api_stream

    monkeypatch.setattr(api_stream, "API_TOKEN", _TEST_API_TOKEN)
    return TestClient(api_stream.app, raise_server_exceptions=False)


def _auth_headers():
    return {"Authorization": f"Bearer {_TEST_API_TOKEN}"}


class TestDialogResolveEndpointFlag:
    """Flag OFF par défaut — protection anti-régression."""

    def test_disabled_by_default_returns_503(self, client, monkeypatch):
        # flag explicitement absent → 503 attendu.
        monkeypatch.delenv("RPA_DIALOG_RESOLVER_ENABLED", raising=False)
        resp = client.post(
            "/api/v1/dialog/resolve",
            json={"current_title": "Confirmer l'enregistrement", "evidence_texts": []},
            headers=_auth_headers(),
        )
        assert resp.status_code == 503
        assert "RPA_DIALOG_RESOLVER_ENABLED" in resp.text


class TestDialogResolveEndpointEnabled:
    """Flag ON : l'endpoint retourne une résolution conforme."""

    @pytest.fixture(autouse=True)
    def _enable_flag(self, monkeypatch):
        monkeypatch.setenv("RPA_DIALOG_RESOLVER_ENABLED", "true")

    def test_match_confirm_save_overwrite(self, client):
        resp = client.post(
            "/api/v1/dialog/resolve",
            json={
                "current_title": "Confirmer l'enregistrement",
                "evidence_texts": [],
                "machine_id": "pc-alpha",
            },
            headers=_auth_headers(),
        )
        assert resp.status_code == 200
        body = resp.json()
        assert body["matched"] is True
        assert body["dialog_id"] == "confirm-save-overwrite"
        assert body["policy"] == "auto"
        assert body["action"] is not None
        assert body["action"]["button_label"] == "Oui"

    def test_match_notepad_with_evidence(self, client):
        resp = client.post(
            "/api/v1/dialog/resolve",
            json={
                "current_title": "Bloc-notes",
                "evidence_texts": ["Ne pas enregistrer"],
                "machine_id": "pc-alpha",
            },
            headers=_auth_headers(),
        )
        assert resp.status_code == 200
        body = resp.json()
        assert body["matched"] is True
        assert body["dialog_id"] == "notepad-unsaved-changes"
        assert body["policy"] == "auto"

    def test_no_match_returns_pause(self, client):
        resp = client.post(
            "/api/v1/dialog/resolve",
            json={
                "current_title": "Fenêtre inconnue XYZ",
                "evidence_texts": [],
                "machine_id": "pc-alpha",
            },
            headers=_auth_headers(),
        )
        assert resp.status_code == 200
        body = resp.json()
        assert body["matched"] is False
        assert body["dialog_id"] == ""
        assert body["policy"] == "pause"
        assert body["action"] is None

    def test_match_windows_uac_returns_pause(self, client):
        resp = client.post(
            "/api/v1/dialog/resolve",
            json={
                "current_title": "Contrôle de compte d'utilisateur",
                "evidence_texts": ["Voulez-vous autoriser cette application"],
                "machine_id": "pc-alpha",
            },
            headers=_auth_headers(),
        )
        assert resp.status_code == 200
        body = resp.json()
        assert body["matched"] is True
        assert body["dialog_id"] == "windows-uac"
        assert body["policy"] == "pause"
        assert body["action"] is None

    def test_requires_auth(self, client):
        resp = client.post(
            "/api/v1/dialog/resolve",
            json={"current_title": "Confirmer l'enregistrement", "evidence_texts": []},
            # pas de header → 401.
        )
        assert resp.status_code == 401