"""Tests anchoring ticket list pagination behavior.

The CEO dashboard (app/templates/dashboard/ceo.html) previously requested
`page_size=500`; the API caps page_size at 200 (`le=200` in
app/routers/tickets.py), so that request returned 422 and the dashboard
rendered empty KPIs. These tests pin the API contract the frontend now
relies on: page_size=200 + page loops that collect every ticket.
"""

from __future__ import annotations

import pytest

pytestmark = pytest.mark.asyncio


async def test_page_size_over_cap_returns_422(client):
    """Requests above the page_size cap must be rejected (the original bug)."""
    resp = await client.get("/api/tickets", params={"page_size": 500})
    assert resp.status_code == 422


async def test_page_size_at_cap_returns_items_and_total(client, seed_tickets):
    """page_size=200 is the max legal value and returns the full response shape."""
    await seed_tickets(14)
    resp = await client.get("/api/tickets", params={"page": 1, "page_size": 200})
    assert resp.status_code == 200
    data = resp.json()
    assert data["total"] == 14
    assert len(data["items"]) == 14
    assert data["page"] == 1
    assert data["page_size"] == 200


async def test_paginated_loop_collects_all_tickets(client, seed_tickets):
    """The frontend's page loop (page_size=200 until total reached) collects every ticket."""
    total_seeded = await seed_tickets(450)  # 3 pages of 200

    collected: list[dict] = []
    total = float("inf")
    page = 1
    page_size = 200
    while len(collected) < total and page <= 1000:
        resp = await client.get("/api/tickets", params={"page": page, "page_size": page_size})
        assert resp.status_code == 200
        data = resp.json()
        assert data["items"], "expected a non-empty page"
        collected.extend(data["items"])
        total = data["total"] or len(collected)
        page += 1

    assert total == total_seeded
    assert len(collected) == total_seeded
    # No duplicate tickets across pages
    ids = [t["id"] for t in collected]
    assert len(set(ids)) == len(ids)