import pytest
from unittest.mock import AsyncMock, patch
from sqlalchemy import select
from app.models.account_invite import AccountInvite


@pytest.mark.asyncio
async def test_create_invite_sends_email_and_stamps_email_sent_at(
    client, test_db, test_user, auth_headers
):
    """Regression: today's create_invite does NOT send email. After this task, it MUST."""
    with patch(
        "app.core.email.EmailService.send_account_invite_email",
        new_callable=AsyncMock, return_value=True,
    ) as mock_send:
        response = await client.post(
            "/api/v1/accounts/me/invites",
            json={"email": "teammate@example.com", "role": "engineer"},
            headers=auth_headers,
        )
    assert response.status_code == 201, response.json()
    mock_send.assert_called_once()
    kwargs = mock_send.call_args.kwargs
    assert kwargs["to_email"] == "teammate@example.com"
    assert kwargs["role"] == "engineer"
    assert kwargs["code"]

    invite = (await test_db.execute(
        select(AccountInvite).where(AccountInvite.email == "teammate@example.com")
    )).scalar_one()
    assert invite.email_sent_at is not None


@pytest.mark.asyncio
async def test_create_invite_email_failure_still_creates_row(
    client, test_db, test_user, auth_headers
):
    """When EmailService returns False, the invite row is still created but
    email_sent_at remains NULL."""
    with patch(
        "app.core.email.EmailService.send_account_invite_email",
        new_callable=AsyncMock, return_value=False,
    ):
        response = await client.post(
            "/api/v1/accounts/me/invites",
            json={"email": "fail-mail@example.com", "role": "engineer"},
            headers=auth_headers,
        )
    assert response.status_code == 201

    invite = (await test_db.execute(
        select(AccountInvite).where(AccountInvite.email == "fail-mail@example.com")
    )).scalar_one()
    assert invite.email_sent_at is None


@pytest.mark.asyncio
async def test_bulk_invite_creates_n_rows_and_sends_n_emails(
    client, test_db, test_user, auth_headers
):
    with patch(
        "app.core.email.EmailService.send_account_invite_email",
        new_callable=AsyncMock, return_value=True,
    ) as mock_send:
        response = await client.post(
            "/api/v1/accounts/me/invites/bulk",
            json={"invites": [
                {"email": "a@example.com", "role": "engineer"},
                {"email": "b@example.com", "role": "engineer"},
                {"email": "c@example.com", "role": "viewer"},
            ]},
            headers=auth_headers,
        )
    assert response.status_code == 201, response.json()
    body = response.json()
    assert len(body["created"]) == 3
    assert body["failed"] == []
    assert mock_send.call_count == 3


@pytest.mark.asyncio
async def test_revoke_invite_sets_revoked_at(client, test_db, test_user, auth_headers):
    import uuid
    from datetime import datetime, timezone, timedelta
    from app.models.account_invite import AccountInvite

    invited_by_id = uuid.UUID(test_user["user_data"]["id"])
    account_id = uuid.UUID(test_user["user_data"]["account_id"])

    invite = AccountInvite(
        account_id=account_id,
        invited_by_id=invited_by_id,
        email="revoked@example.com",
        code="REVOKEME01",
        role="engineer",
        expires_at=datetime.now(timezone.utc) + timedelta(days=7),
    )
    test_db.add(invite)
    await test_db.commit()
    invite_id = invite.id

    response = await client.delete(
        f"/api/v1/accounts/me/invites/{invite_id}",
        headers=auth_headers,
    )
    assert response.status_code == 204

    await test_db.refresh(invite)
    assert invite.revoked_at is not None
    assert invite.is_valid is False


@pytest.mark.asyncio
async def test_revoke_invite_idempotent(client, test_db, test_user, auth_headers):
    import uuid
    from datetime import datetime, timezone, timedelta
    from app.models.account_invite import AccountInvite

    invited_by_id = uuid.UUID(test_user["user_data"]["id"])
    account_id = uuid.UUID(test_user["user_data"]["account_id"])

    invite = AccountInvite(
        account_id=account_id,
        invited_by_id=invited_by_id,
        email="revoked2@example.com",
        code="REVOKEME02",
        role="engineer",
        revoked_at=datetime.now(timezone.utc),
        expires_at=datetime.now(timezone.utc) + timedelta(days=7),
    )
    test_db.add(invite)
    await test_db.commit()
    invite_id = invite.id

    response = await client.delete(
        f"/api/v1/accounts/me/invites/{invite_id}",
        headers=auth_headers,
    )
    assert response.status_code == 204


@pytest.mark.asyncio
async def test_revoke_invite_404_when_not_found(client, test_user, auth_headers):
    import uuid
    response = await client.delete(
        f"/api/v1/accounts/me/invites/{uuid.uuid4()}",
        headers=auth_headers,
    )
    assert response.status_code == 404


@pytest.mark.asyncio
async def test_revoke_used_invite_returns_400(
    client, test_db, test_user, auth_headers
):
    import uuid
    from datetime import datetime, timezone, timedelta
    from app.models.account_invite import AccountInvite

    invited_by_id = uuid.UUID(test_user["user_data"]["id"])
    account_id = uuid.UUID(test_user["user_data"]["account_id"])

    invite = AccountInvite(
        account_id=account_id,
        invited_by_id=invited_by_id,
        email="used@example.com",
        code="USEDCODE01",
        role="engineer",
        accepted_by_id=invited_by_id,  # mark as used
        expires_at=datetime.now(timezone.utc) + timedelta(days=7),
    )
    test_db.add(invite)
    await test_db.commit()
    invite_id = invite.id

    response = await client.delete(
        f"/api/v1/accounts/me/invites/{invite_id}",
        headers=auth_headers,
    )
    assert response.status_code == 400