"""
Test di integrazione – API invio PEC (POST /send e GET /send/jobs).

Usa SQLite in-memory + mock dell'arq pool per evitare dipendenze esterne.
"""

import uuid
from unittest.mock import AsyncMock, patch

import pytest
import pytest_asyncio
from httpx import AsyncClient
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.security import encrypt_credential


# ─── Fixtures ─────────────────────────────────────────────────────────────────


@pytest_asyncio.fixture
async def active_mailbox(db_session: AsyncSession, demo_tenant):
    """Crea una casella PEC attiva nel tenant di test."""
    from app.models.mailbox import Mailbox

    mailbox = Mailbox(
        tenant_id=demo_tenant.id,
        email_address="test@pec.example.it",
        display_name="Test PEC",
        provider="test",
        imap_host_enc=encrypt_credential("imap.example.it"),
        imap_port_enc=encrypt_credential("993"),
        imap_user_enc=encrypt_credential("test@pec.example.it"),
        imap_pass_enc=encrypt_credential("secret"),
        imap_use_ssl=True,
        smtp_host_enc=encrypt_credential("smtp.example.it"),
        smtp_port_enc=encrypt_credential("465"),
        smtp_user_enc=encrypt_credential("test@pec.example.it"),
        smtp_pass_enc=encrypt_credential("secret"),
        smtp_use_tls=True,
        status="active",
    )
    db_session.add(mailbox)
    await db_session.commit()
    await db_session.refresh(mailbox)
    return mailbox


@pytest_asyncio.fixture
async def auth_headers(admin_token: str) -> dict:
    """Header Authorization con token admin."""
    return {"Authorization": f"Bearer {admin_token}"}


# ─── Test POST /send ──────────────────────────────────────────────────────────


class TestCreateSendJob:
    """Test endpoint POST /api/v1/send."""

    @pytest.mark.asyncio
    async def test_send_requires_authentication(self, client: AsyncClient, active_mailbox):
        """Senza token → 401."""
        response = await client.post(
            "/api/v1/send",
            json={
                "mailbox_id": str(active_mailbox.id),
                "to_addresses": ["dest@pec.it"],
                "subject": "Test",
                "body_text": "corpo",
            },
        )
        assert response.status_code == 401

    @pytest.mark.asyncio
    async def test_send_missing_to_addresses(
        self, client: AsyncClient, auth_headers: dict, active_mailbox
    ):
        """Lista destinatari vuota → 422 validazione."""
        with patch("app.services.send_service._get_arq_pool") as mock_pool:
            mock_pool.return_value = AsyncMock()
            mock_pool.return_value.enqueue_job = AsyncMock()

            response = await client.post(
                "/api/v1/send",
                json={
                    "mailbox_id": str(active_mailbox.id),
                    "to_addresses": [],
                    "subject": "Test",
                    "body_text": "corpo",
                },
                headers=auth_headers,
            )
        assert response.status_code == 422

    @pytest.mark.asyncio
    async def test_send_missing_subject(
        self, client: AsyncClient, auth_headers: dict, active_mailbox
    ):
        """Oggetto vuoto → 422 validazione."""
        with patch("app.services.send_service._get_arq_pool") as mock_pool:
            mock_pool.return_value = AsyncMock()
            response = await client.post(
                "/api/v1/send",
                json={
                    "mailbox_id": str(active_mailbox.id),
                    "to_addresses": ["dest@pec.it"],
                    "subject": "   ",
                    "body_text": "corpo",
                },
                headers=auth_headers,
            )
        assert response.status_code == 422

    @pytest.mark.asyncio
    async def test_send_mailbox_not_found(self, client: AsyncClient, auth_headers: dict):
        """Casella inesistente → 404."""
        with patch("app.services.send_service._get_arq_pool") as mock_pool:
            mock_pool.return_value = AsyncMock()
            response = await client.post(
                "/api/v1/send",
                json={
                    "mailbox_id": str(uuid.uuid4()),
                    "to_addresses": ["dest@pec.it"],
                    "subject": "Test",
                    "body_text": "corpo",
                },
                headers=auth_headers,
            )
        assert response.status_code == 404

    @pytest.mark.asyncio
    async def test_send_success_creates_job(
        self, client: AsyncClient, auth_headers: dict, active_mailbox
    ):
        """Invio valido → 201 con SendJobResponse."""
        mock_arq = AsyncMock()
        mock_arq.enqueue_job = AsyncMock(return_value=None)

        with patch("app.services.send_service._get_arq_pool", return_value=mock_arq):
            response = await client.post(
                "/api/v1/send",
                json={
                    "mailbox_id": str(active_mailbox.id),
                    "to_addresses": ["matteo1801@spidmail.it"],
                    "subject": "Test PEChub Fase 4",
                    "body_text": "Messaggio di test inviato da PEChub.",
                },
                headers=auth_headers,
            )

        assert response.status_code == 201
        data = response.json()
        assert data["status"] == "pending"
        assert data["mailbox_id"] == str(active_mailbox.id)
        assert data["attempt_count"] == 0
        assert data["max_attempts"] == 5
        assert "id" in data
        # Verifica che arq sia stato chiamato
        mock_arq.enqueue_job.assert_called_once()
        call_args = mock_arq.enqueue_job.call_args
        assert call_args[0][0] == "send_pec"

    @pytest.mark.asyncio
    async def test_send_with_cc(
        self, client: AsyncClient, auth_headers: dict, active_mailbox
    ):
        """Invio con Cc → 201 con cc_addresses nel messaggio."""
        mock_arq = AsyncMock()
        mock_arq.enqueue_job = AsyncMock(return_value=None)

        with patch("app.services.send_service._get_arq_pool", return_value=mock_arq):
            response = await client.post(
                "/api/v1/send",
                json={
                    "mailbox_id": str(active_mailbox.id),
                    "to_addresses": ["dest@pec.it"],
                    "cc_addresses": ["cc@pec.it"],
                    "subject": "Test con Cc",
                    "body_text": "corpo",
                },
                headers=auth_headers,
            )

        assert response.status_code == 201

    @pytest.mark.asyncio
    async def test_send_arq_failure_still_returns_201(
        self, client: AsyncClient, auth_headers: dict, active_mailbox
    ):
        """
        Se arq fallisce (Redis down), il job viene comunque creato nel DB
        e l'API risponde 201 (il job resta pending).
        """
        mock_arq = AsyncMock()
        mock_arq.enqueue_job = AsyncMock(side_effect=ConnectionError("Redis non disponibile"))

        with patch("app.services.send_service._get_arq_pool", return_value=mock_arq):
            response = await client.post(
                "/api/v1/send",
                json={
                    "mailbox_id": str(active_mailbox.id),
                    "to_addresses": ["dest@pec.it"],
                    "subject": "Test Redis down",
                    "body_text": "corpo",
                },
                headers=auth_headers,
            )

        # Il job deve essere creato anche se Redis fallisce
        assert response.status_code == 201
        assert response.json()["status"] == "pending"


# ─── Test GET /send/jobs ──────────────────────────────────────────────────────


class TestListSendJobs:
    """Test endpoint GET /api/v1/send/jobs."""

    @pytest.mark.asyncio
    async def test_list_requires_authentication(self, client: AsyncClient):
        """Senza token → 401."""
        response = await client.get("/api/v1/send/jobs")
        assert response.status_code == 401

    @pytest.mark.asyncio
    async def test_list_returns_empty_for_new_tenant(
        self, client: AsyncClient, auth_headers: dict
    ):
        """Tenant senza job → lista vuota."""
        response = await client.get("/api/v1/send/jobs", headers=auth_headers)
        assert response.status_code == 200
        data = response.json()
        assert "items" in data
        assert "total" in data

    @pytest.mark.asyncio
    async def test_list_after_send(
        self, client: AsyncClient, auth_headers: dict, active_mailbox
    ):
        """Dopo un invio, la lista deve contenere almeno un job."""
        mock_arq = AsyncMock()
        mock_arq.enqueue_job = AsyncMock(return_value=None)

        # Crea un job
        with patch("app.services.send_service._get_arq_pool", return_value=mock_arq):
            await client.post(
                "/api/v1/send",
                json={
                    "mailbox_id": str(active_mailbox.id),
                    "to_addresses": ["dest@pec.it"],
                    "subject": "Job per lista",
                    "body_text": "corpo",
                },
                headers=auth_headers,
            )

        # Lista
        response = await client.get("/api/v1/send/jobs", headers=auth_headers)
        assert response.status_code == 200
        data = response.json()
        assert data["total"] >= 1


# ─── Test GET /send/jobs/{id} ─────────────────────────────────────────────────


class TestGetSendJob:
    """Test endpoint GET /api/v1/send/jobs/{job_id}."""

    @pytest.mark.asyncio
    async def test_get_nonexistent_job(self, client: AsyncClient, auth_headers: dict):
        """Job inesistente → 404."""
        response = await client.get(
            f"/api/v1/send/jobs/{uuid.uuid4()}", headers=auth_headers
        )
        assert response.status_code == 404

    @pytest.mark.asyncio
    async def test_get_existing_job(
        self, client: AsyncClient, auth_headers: dict, active_mailbox
    ):
        """Recupera un job esistente."""
        mock_arq = AsyncMock()
        mock_arq.enqueue_job = AsyncMock(return_value=None)

        # Crea
        with patch("app.services.send_service._get_arq_pool", return_value=mock_arq):
            create_resp = await client.post(
                "/api/v1/send",
                json={
                    "mailbox_id": str(active_mailbox.id),
                    "to_addresses": ["dest@pec.it"],
                    "subject": "Job da recuperare",
                    "body_text": "corpo",
                },
                headers=auth_headers,
            )

        assert create_resp.status_code == 201
        job_id = create_resp.json()["id"]

        # Recupera
        response = await client.get(
            f"/api/v1/send/jobs/{job_id}", headers=auth_headers
        )
        assert response.status_code == 200
        assert response.json()["id"] == job_id


# ─── Test DELETE /send/jobs/{id} ─────────────────────────────────────────────


class TestCancelSendJob:
    """Test endpoint DELETE /api/v1/send/jobs/{job_id}."""

    @pytest.mark.asyncio
    async def test_cancel_pending_job(
        self, client: AsyncClient, auth_headers: dict, active_mailbox
    ):
        """Annulla un job in stato pending → 204."""
        mock_arq = AsyncMock()
        mock_arq.enqueue_job = AsyncMock(return_value=None)

        # Crea job
        with patch("app.services.send_service._get_arq_pool", return_value=mock_arq):
            create_resp = await client.post(
                "/api/v1/send",
                json={
                    "mailbox_id": str(active_mailbox.id),
                    "to_addresses": ["dest@pec.it"],
                    "subject": "Job da annullare",
                    "body_text": "corpo",
                },
                headers=auth_headers,
            )
        job_id = create_resp.json()["id"]

        # Annulla
        response = await client.delete(
            f"/api/v1/send/jobs/{job_id}", headers=auth_headers
        )
        assert response.status_code == 204

        # Verifica stato
        get_resp = await client.get(
            f"/api/v1/send/jobs/{job_id}", headers=auth_headers
        )
        assert get_resp.json()["status"] == "failed"
        assert "Annullato" in get_resp.json()["last_error"]