from datetime import datetime, timedelta, timezone

import pytest

from backend.app import create_app
from backend.app.models import ImageRecord


@pytest.fixture
async def app():
    return create_app()


@pytest.fixture
async def client(app):
    async with app.test_client() as c:
        yield c


async def _seed(db, count: int = 3):
    base = datetime.now(timezone.utc)
    for i in range(count):
        r = ImageRecord(
            path=f"/images/x/{i}.jpg",
            sha256=f"x{i:063d}",
            size_bytes=1, mime="image/jpeg", width=1, height=1,
            origin="imported_filesystem", integrity_status="unknown",
        )
        r.created_at = base - timedelta(minutes=i)
        db.add(r)
    await db.flush()
    await db.commit()


@pytest.mark.asyncio
async def test_scroll_returns_images(client, db):
    await _seed(db)
    resp = await client.get("/api/gallery/scroll?limit=10")
    assert resp.status_code == 200
    body = await resp.get_json()
    assert len(body["images"]) == 3
    assert "next_cursor" in body
    assert "date_groups" in body


@pytest.mark.asyncio
async def test_scroll_rejects_bad_limit(client):
    resp = await client.get("/api/gallery/scroll?limit=notanumber")
    assert resp.status_code == 400


@pytest.mark.asyncio
async def test_timeline_endpoint(client, db):
    await _seed(db)
    resp = await client.get("/api/gallery/timeline")
    assert resp.status_code == 200
    body = await resp.get_json()
    assert sum(b["count"] for b in body) == 3


@pytest.mark.asyncio
async def test_jump_requires_year_month(client):
    resp = await client.get("/api/gallery/jump")
    assert resp.status_code == 400


@pytest.mark.asyncio
async def test_image_detail_404_when_missing(client):
    resp = await client.get("/api/gallery/image/99999")
    assert resp.status_code == 404