"""Tests for the public GET /accounts/invites/{code}/lookup endpoint
(consumed by the /accept-invite page on the frontend)."""

import uuid
from datetime import datetime, timedelta, timezone
from unittest.mock import AsyncMock, patch

import pytest
from sqlalchemy import select

from app.models.account_invite import AccountInvite


@pytest.mark.asyncio
async def test_invite_lookup_returns_account_info_for_valid_code(
    client, test_db, test_user, auth_headers
):
    """A freshly-created, unused, unexpired invite resolves to the inviter's
    account name + the inviter's display name + the invited email + role."""
    with patch(
        "app.core.email.EmailService.send_account_invite_email",
        new_callable=AsyncMock,
        return_value=True,
    ):
        create_resp = await client.post(
            "/api/v1/accounts/me/invites",
            json={"email": "lookup@example.com", "role": "engineer"},
            headers=auth_headers,
        )
    assert create_resp.status_code == 201, create_resp.json()
    code = create_resp.json()["code"]

    response = await client.get(f"/api/v1/accounts/invites/{code}/lookup")
    assert response.status_code == 200, response.json()
    body = response.json()

    assert body["invited_email"] == "lookup@example.com"
    assert body["role"] == "engineer"
    assert body["inviter_name"] == test_user["user_data"]["name"]
    # account_name is whatever the test_user fixture seeded for the account.
    assert isinstance(body["account_name"], str) and body["account_name"]


@pytest.mark.asyncio
async def test_invite_lookup_returns_404_for_invalid_or_expired_code(
    client, test_db, test_user
):
    """Three failure modes (unknown code, expired, revoked, used) all collapse
    to the same 404 + invite_invalid_or_expired_or_revoked error code."""
    invited_by_id = uuid.UUID(test_user["user_data"]["id"])
    account_id = uuid.UUID(test_user["user_data"]["account_id"])

    # 1) Unknown code
    unknown = await client.get("/api/v1/accounts/invites/DOESNOTEXIST/lookup")
    assert unknown.status_code == 404
    assert unknown.json()["detail"]["error"] == "invite_invalid_or_expired_or_revoked"

    # 2) Expired
    expired_invite = AccountInvite(
        account_id=account_id,
        invited_by_id=invited_by_id,
        email="expired@example.com",
        code="EXPIREDLOOKUP01",
        role="engineer",
        expires_at=datetime.now(timezone.utc) - timedelta(days=1),
    )
    test_db.add(expired_invite)
    await test_db.commit()
    expired = await client.get("/api/v1/accounts/invites/EXPIREDLOOKUP01/lookup")
    assert expired.status_code == 404
    assert expired.json()["detail"]["error"] == "invite_invalid_or_expired_or_revoked"

    # 3) Revoked
    revoked_invite = AccountInvite(
        account_id=account_id,
        invited_by_id=invited_by_id,
        email="revoked@example.com",
        code="REVOKEDLOOKUP01",
        role="engineer",
        expires_at=datetime.now(timezone.utc) + timedelta(days=7),
        revoked_at=datetime.now(timezone.utc),
    )
    test_db.add(revoked_invite)
    await test_db.commit()
    revoked = await client.get("/api/v1/accounts/invites/REVOKEDLOOKUP01/lookup")
    assert revoked.status_code == 404
    assert revoked.json()["detail"]["error"] == "invite_invalid_or_expired_or_revoked"

    # 4) Already used
    used_invite = AccountInvite(
        account_id=account_id,
        invited_by_id=invited_by_id,
        email="used@example.com",
        code="USEDLOOKUP01",
        role="engineer",
        expires_at=datetime.now(timezone.utc) + timedelta(days=7),
        accepted_by_id=invited_by_id,
        used_at=datetime.now(timezone.utc),
    )
    test_db.add(used_invite)
    await test_db.commit()
    used = await client.get("/api/v1/accounts/invites/USEDLOOKUP01/lookup")
    assert used.status_code == 404
    assert used.json()["detail"]["error"] == "invite_invalid_or_expired_or_revoked"

    # Sanity: rows survived (no destructive side effects).
    persisted = (
        await test_db.execute(
            select(AccountInvite).where(
                AccountInvite.code.in_(
                    ["EXPIREDLOOKUP01", "REVOKEDLOOKUP01", "USEDLOOKUP01"]
                )
            )
        )
    ).scalars().all()
    assert len(persisted) == 3


@pytest.mark.asyncio
async def test_oauth_callback_links_invite_when_account_invite_code_supplied(
    client, test_db, test_user, auth_headers, monkeypatch
):
    """Brand-new OAuth user with account_invite_code joins the invited account
    instead of getting a personal one. Invite is marked used."""
    from app.core.config import settings
    from app.models.user import User
    from app.services.oauth_providers import OAuthProfile

    monkeypatch.setattr(settings, "GOOGLE_CLIENT_ID", "client_dummy")
    monkeypatch.setattr(settings, "GOOGLE_CLIENT_SECRET", "secret_dummy")

    with patch(
        "app.core.email.EmailService.send_account_invite_email",
        new_callable=AsyncMock,
        return_value=True,
    ):
        create_resp = await client.post(
            "/api/v1/accounts/me/invites",
            json={"email": "oauth-invite@example.com", "role": "engineer"},
            headers=auth_headers,
        )
    code = create_resp.json()["code"]
    inviter_account_id = uuid.UUID(test_user["user_data"]["account_id"])

    profile = OAuthProfile(
        provider_subject="google_invite_subject_1",
        email="oauth-invite@example.com",
        name="OAuth Invitee",
    )
    with patch("app.api.endpoints.oauth.google_exchange_code", return_value=profile):
        response = await client.post(
            "/api/v1/auth/google/callback",
            json={
                "code": "auth_code_xyz",
                "account_invite_code": code,
                "invited_email": "oauth-invite@example.com",
            },
        )
    assert response.status_code == 200, response.json()
    assert response.json()["is_new_user"] is True

    user = (
        await test_db.execute(
            select(User).where(User.email == "oauth-invite@example.com")
        )
    ).scalar_one()
    assert user.account_id == inviter_account_id
    assert user.account_role == "engineer"

    invite = (
        await test_db.execute(
            select(AccountInvite).where(AccountInvite.code == code)
        )
    ).scalar_one()
    assert invite.used_at is not None
    assert invite.accepted_by_id == user.id


@pytest.mark.asyncio
async def test_oauth_callback_existing_email_with_invite_returns_400(
    client, test_db, test_user, auth_headers, monkeypatch
):
    """If a user already exists with the invited email (e.g., previously
    registered via password), arriving via /accept-invite OAuth must NOT
    silently link the OAuth identity to their existing account and skip the
    invite. Surface email_already_registered_use_login so the user signs in
    and accepts the invite from the dashboard instead."""
    from app.core.config import settings
    from app.services.oauth_providers import OAuthProfile

    monkeypatch.setattr(settings, "GOOGLE_CLIENT_ID", "client_dummy")
    monkeypatch.setattr(settings, "GOOGLE_CLIENT_SECRET", "secret_dummy")

    # 1) Pre-existing user with a password (separate from the inviter).
    existing_email = "already-here@example.com"
    register_resp = await client.post(
        "/api/v1/auth/register",
        json={
            "email": existing_email,
            "password": "PreviousPassword123!",
            "name": "Already Here",
        },
    )
    assert register_resp.status_code in (200, 201), register_resp.json()

    # 2) Inviter creates an invite for that exact email.
    with patch(
        "app.core.email.EmailService.send_account_invite_email",
        new_callable=AsyncMock,
        return_value=True,
    ):
        create_resp = await client.post(
            "/api/v1/accounts/me/invites",
            json={"email": existing_email, "role": "engineer"},
            headers=auth_headers,
        )
    assert create_resp.status_code == 201, create_resp.json()
    code = create_resp.json()["code"]

    # 3) The existing user does Google OAuth and the callback receives the
    #    invite code. Backend must reject — not link silently.
    profile = OAuthProfile(
        provider_subject="google_existing_subject_1",
        email=existing_email,
        name="Already Here",
    )
    with patch("app.api.endpoints.oauth.google_exchange_code", return_value=profile):
        response = await client.post(
            "/api/v1/auth/google/callback",
            json={
                "code": "auth_code_xyz",
                "account_invite_code": code,
                "invited_email": existing_email,
            },
        )
    assert response.status_code == 400, response.json()
    assert (
        response.json()["detail"]["error"] == "email_already_registered_use_login"
    )

    # 4) Sanity: the invite was NOT consumed.
    invite = (
        await test_db.execute(
            select(AccountInvite).where(AccountInvite.code == code)
        )
    ).scalar_one()
    assert invite.used_at is None
    assert invite.accepted_by_id is None


@pytest.mark.asyncio
async def test_oauth_callback_invite_email_mismatch_returns_400(
    client, test_db, test_user, auth_headers, monkeypatch
):
    """If the OAuth profile's email differs from the invite's email, the
    backend rejects the link with invite_email_mismatch (mirrors register)."""
    from app.core.config import settings
    from app.services.oauth_providers import OAuthProfile

    monkeypatch.setattr(settings, "GOOGLE_CLIENT_ID", "client_dummy")
    monkeypatch.setattr(settings, "GOOGLE_CLIENT_SECRET", "secret_dummy")

    with patch(
        "app.core.email.EmailService.send_account_invite_email",
        new_callable=AsyncMock,
        return_value=True,
    ):
        create_resp = await client.post(
            "/api/v1/accounts/me/invites",
            json={"email": "expected@example.com", "role": "engineer"},
            headers=auth_headers,
        )
    code = create_resp.json()["code"]

    profile = OAuthProfile(
        provider_subject="google_invite_subject_2",
        email="different@example.com",
        name="Wrong Email",
    )
    with patch("app.api.endpoints.oauth.google_exchange_code", return_value=profile):
        response = await client.post(
            "/api/v1/auth/google/callback",
            json={
                "code": "auth_code_xyz",
                "account_invite_code": code,
                "invited_email": "expected@example.com",
            },
        )
    assert response.status_code == 400, response.json()
    assert response.json()["detail"]["error"] == "invite_email_mismatch"