"""Integration: derived views exposed on InformationSpace over two shards (SHARD-WP-0010 T5)."""

from shard_wiki.adapters import FolderAdapter
from shard_wiki.model import Identity
from shard_wiki.space import InformationSpace


def _shard(tmp_path, name, files):
    root = tmp_path / name
    for rel, text in files.items():
        p = root / rel
        p.parent.mkdir(parents=True, exist_ok=True)
        p.write_text(text, encoding="utf-8")
    return FolderAdapter(name, root)


def _space(tmp_path):
    space = InformationSpace("space")
    space.attach(
        _shard(tmp_path, "wiki", {"Home.md": "welcome, see [[Guide]]", "Guide.md": "the guide"})
    )
    space.attach(_shard(tmp_path, "notes", {"Daily.md": "today I read [[Guide]]"}))
    return space


def test_backlinks_across_two_shards(tmp_path):
    space = _space(tmp_path)
    sources = {bl.source for bl in space.backlinks("Guide")}
    assert sources == {Identity("wiki", "Home"), Identity("notes", "Daily")}


def test_all_pages_and_site_map_over_union(tmp_path):
    space = _space(tmp_path)
    names = {e.name for e in space.all_pages()}
    assert names == {"Home", "Guide", "Daily"}
    leaves = {p.key for p in space.site_map().pages}
    assert {"Home", "Guide", "Daily"} <= leaves


def test_recent_changes_includes_alias_and_edits(tmp_path):
    space = _space(tmp_path)
    space.alias("Start", "wiki:Home", actor="ana")
    feed = space.recent_changes()
    kinds = {e.kind for e in feed}
    assert "alias" in kinds and "edit" in kinds
    alias = next(e for e in feed if e.kind == "alias")
    assert alias.source == "coordination" and alias.actor == "ana"


def test_red_link_creates_no_backlink_via_space(tmp_path):
    space = _space(tmp_path)
    assert space.backlinks("Nonexistent") == ()