"""Snapshots API: read-only history listing, newest-first, ownership-scoped.
Snapshots have no creation endpoint (they're written internally by
collection_service.py during a monitoring run), so tests insert one directly
via db_session against the same DB the `client` fixture's TestClient uses."""

from __future__ import annotations

import uuid

import pytest

from app.models.snapshot import Snapshot


def _register_and_login(client) -> dict[str, str]:
    email = f"user-{uuid.uuid4().hex[:12]}@example.com"
    client.post(
        "/api/v1/auth/register",
        json={"email": email, "password": "correct-horse-1", "display_name": "Test User"},
    )
    tokens = client.post(
        "/api/v1/auth/login", json={"email": email, "password": "correct-horse-1"}
    ).json()
    return {"Authorization": f"Bearer {tokens['access_token']}"}


def _create_company(client, headers):
    return client.post(
        "/api/v1/companies",
        json={"name": f"Co {uuid.uuid4().hex[:6]}", "frequency_type": "weekly"},
        headers=headers,
    ).json()


def _create_source(client, headers, company_id):
    return client.post(
        f"/api/v1/companies/{company_id}/sources",
        json={"source_type": "custom_url", "name": "Pricing", "base_url": "https://example.com"},
        headers=headers,
    ).json()


def test_snapshots_empty_before_any_collection(client):
    headers = _register_and_login(client)
    company = _create_company(client, headers)

    resp = client.get(f"/api/v1/companies/{company['id']}/snapshots", headers=headers)

    assert resp.status_code == 200
    assert resp.json() == []


@pytest.mark.asyncio
async def test_snapshots_list_newest_first(client, db_session):
    headers = _register_and_login(client)
    company = _create_company(client, headers)
    source = _create_source(client, headers, company["id"])

    older = Snapshot(
        company_id=uuid.UUID(company["id"]),
        source_id=uuid.UUID(source["id"]),
        snapshot_type="website",
        hash="hash-older",
        structured_summary={"title": "Old"},
        text_summary="Old page text",
    )
    db_session.add(older)
    await db_session.commit()

    newer = Snapshot(
        company_id=uuid.UUID(company["id"]),
        source_id=uuid.UUID(source["id"]),
        snapshot_type="website",
        hash="hash-newer",
        structured_summary={"title": "New"},
        text_summary="New page text",
    )
    db_session.add(newer)
    await db_session.commit()

    resp = client.get(f"/api/v1/companies/{company['id']}/snapshots", headers=headers)

    assert resp.status_code == 200
    body = resp.json()
    assert len(body) == 2
    assert body[0]["hash"] == "hash-newer"
    assert body[1]["hash"] == "hash-older"
    assert body[0]["text_summary"] == "New page text"


def test_snapshots_scoped_to_owner(client):
    owner_headers = _register_and_login(client)
    other_headers = _register_and_login(client)
    company = _create_company(client, owner_headers)

    resp = client.get(f"/api/v1/companies/{company['id']}/snapshots", headers=other_headers)

    assert resp.status_code == 404