"""Tests for the FolderAdapter (SHARD-WP-0007 T3)."""

import pytest

from shard_wiki.adapters import FolderAdapter
from shard_wiki.model import Identity, NotSupported, Verb


def _make_shard(tmp_path, files: dict[str, str]) -> FolderAdapter:
    for rel, text in files.items():
        p = tmp_path / rel
        p.parent.mkdir(parents=True, exist_ok=True)
        p.write_text(text, encoding="utf-8")
    return FolderAdapter("shardA", tmp_path)


def test_keys_and_read(tmp_path):
    shard = _make_shard(tmp_path, {"Home.md": "# Home", "sub/Topic.md": "topic body"})
    assert set(shard.keys()) == {"Home", "sub/Topic"}
    page = shard.read("sub/Topic")
    assert page.identity == Identity("shardA", "sub/Topic")
    assert page.body == "topic body"
    assert page.envelope.source_shard == "shardA"
    assert page.envelope.source_rev is not None  # mtime stamp
    assert page.placements[0].path == "sub/Topic.md"


def test_read_missing_raises_keyerror(tmp_path):
    shard = _make_shard(tmp_path, {"Home.md": "x"})
    with pytest.raises(KeyError):
        shard.read("Nope")


def test_profile_is_valid_and_read_only(tmp_path):
    shard = _make_shard(tmp_path, {"Home.md": "x"})
    prof = shard.profile()  # .validate() already called inside
    assert prof.supports(Verb.READ)
    assert not prof.supports(Verb.WRITE)


def test_unsupported_write_is_honest(tmp_path):
    shard = _make_shard(tmp_path, {"Home.md": "x"})
    with pytest.raises(NotSupported):
        shard.write("Home", "new")