from datetime import datetime, timedelta


def test_create_text_default_public_and_24h(client):
    r = client.post("/api/items", json={"body": "hello **md**"})
    assert r.status_code == 200
    data = r.json()
    assert data["slug"]
    assert data["is_public"] is True
    assert data["expires_at"] is not None
    assert data["kind"] == "text"
    assert data["title"] == "hello **md**"
    assert data["body"] == "hello **md**"
    assert data["burn_after_read"] is False
    assert data["view_count"] == 0
    assert data["created_at"]


def test_link_only_not_on_wall(client):
    r = client.post("/api/items", json={"body": "secret", "is_public": False})
    slug = r.json()["slug"]
    wall = client.get("/api/items/wall").json()["items"]
    assert all(i["slug"] != slug for i in wall)
    assert client.get(f"/api/items/{slug}").status_code == 200


def test_ttl_options(client):
    never = client.post("/api/items", json={"body": "n", "ttl": "never"}).json()
    assert never["expires_at"] is None

    one_h = client.post("/api/items", json={"body": "h", "ttl": "1h"}).json()
    expires = datetime.fromisoformat(one_h["expires_at"])
    delta = expires - datetime.fromisoformat(one_h["created_at"])
    assert timedelta(minutes=50) < delta < timedelta(hours=2)

    week = client.post("/api/items", json={"body": "w", "ttl": "7d"}).json()
    expires_w = datetime.fromisoformat(week["expires_at"])
    delta_w = expires_w - datetime.fromisoformat(week["created_at"])
    assert timedelta(days=6) < delta_w < timedelta(days=8)


def test_wall_pagination_shape(client):
    for i in range(3):
        client.post("/api/items", json={"body": f"item {i}", "is_public": True})

    r = client.get("/api/items/wall", params={"page": 1, "page_size": 2})
    assert r.status_code == 200
    data = r.json()
    assert "items" in data
    assert data["page"] == 1
    assert data["page_size"] == 2
    assert data["total"] >= 3
    assert len(data["items"]) == 2
    # newest first
    titles = [i["title"] for i in data["items"]]
    assert titles[0] == "item 2"


def test_get_missing_404(client):
    assert client.get("/api/items/does-not-exist").status_code == 404


def test_title_from_first_line(client):
    r = client.post("/api/items", json={"body": "First line\nSecond line"})
    assert r.json()["title"] == "First line"


def test_explicit_title(client):
    r = client.post("/api/items", json={"body": "body text", "title": "Custom"})
    assert r.json()["title"] == "Custom"