"""Tests for manifest.json PWA support. Fixes #832 (Missing manifest.json)."""
import json
from pathlib import Path


def test_manifest_exists() -> None:
    assert Path("manifest.json").exists(), "manifest.json must exist for PWA support"


def test_manifest_is_valid_json() -> None:
    content = Path("manifest.json").read_text()
    data = json.loads(content)
    assert isinstance(data, dict)


def test_manifest_has_required_pwa_fields() -> None:
    data = json.loads(Path("manifest.json").read_text())
    assert "name" in data, "manifest.json must have 'name'"
    assert "short_name" in data, "manifest.json must have 'short_name'"
    assert "start_url" in data, "manifest.json must have 'start_url'"
    assert "display" in data, "manifest.json must have 'display'"
    assert "icons" in data, "manifest.json must have 'icons'"


def test_manifest_icons_non_empty() -> None:
    data = json.loads(Path("manifest.json").read_text())
    assert len(data["icons"]) > 0, "manifest.json must define at least one icon"


def test_index_html_references_manifest() -> None:
    content = Path("index.html").read_text()
    assert 'rel="manifest"' in content, "index.html must have <link rel=\"manifest\">"
    assert "manifest.json" in content, "index.html must reference manifest.json"


def test_help_html_references_manifest() -> None:
    content = Path("help.html").read_text()
    assert 'rel="manifest"' in content, "help.html must have <link rel=\"manifest\">"
    assert "manifest.json" in content, "help.html must reference manifest.json"