"""Tests for Store — post loading, saving, deleting, media handling."""

from __future__ import annotations

import os
from pathlib import Path

import pytest

from volumen.post import Post
from volumen.store import Store


class TestLoading:
    def test_all_loads_every_post(self, store: Store) -> None:
        posts = store.all()
        assert len(posts) == 2  # hello.md + draft.md

    def test_slug_falls_back_to_filename(self, store: Store) -> None:
        slugs = sorted(p.slug for p in store.all())
        assert slugs == ["draft", "hello"]

    def test_lang_derived_from_subdirectory(self, tmp_path: Path) -> None:
        content = tmp_path / "posts"
        content.mkdir()
        (content / "hello.md").write_text('+++\ntitle = "Hello"\n+++\n\nBody\n')
        cs_dir = content / "cs"
        cs_dir.mkdir()
        (cs_dir / "ahoj.md").write_text('+++\ntitle = "Ahoj"\n+++\n\nTelo\n')
        st = Store(str(content), default_lang="en")
        assert st.find("ahoj").lang == "cs"
        assert st.find("hello").lang == "en"

    def test_find_returns_none_when_missing(self, store: Store) -> None:
        assert store.find("nope") is None

    def test_all_langs_post_visible_in_any_language(self, tmp_content_dir: Path) -> None:
        (tmp_content_dir / "global.md").write_text(
            '+++\ntitle = "Global"\nlang = "en"\nall_langs = true\n+++\n\nVisible everywhere.\n'
        )
        store = Store(str(tmp_content_dir), default_lang="en")
        assert store.find("global", lang="cs") is not None
        assert store.find("global", lang="en") is not None

    def test_draft_post_is_loaded(self, store: Store) -> None:
        draft = store.find("draft")
        assert draft is not None
        assert draft.draft is True

    def test_post_with_missing_slug_derived_from_path(self, tmp_content_dir: Path) -> None:
        (tmp_content_dir / "noslug.md").write_text('+++\ntitle = "No Slug"\n+++\n\nBody\n')
        store = Store(str(tmp_content_dir), default_lang="en")
        post = store.find("noslug")
        assert post is not None
        assert post.slug == "noslug"
        assert post.lang == "en"


class TestSave:
    def test_save_new_post(self, tmp_content_dir: Path) -> None:
        store = Store(str(tmp_content_dir), default_lang="en")
        post = Post(metadata={"slug": "newpost", "title": "New"}, body="Content")
        store.save(post)
        assert os.path.isfile(os.path.join(str(tmp_content_dir), "newpost.md"))

    def test_save_updates_existing_post(self, tmp_content_dir: Path) -> None:
        store = Store(str(tmp_content_dir), default_lang="en")
        post = store.find("hello")
        assert post is not None
        post.body = "Updated content."
        store.save(post)
        reloaded = store.find("hello")
        assert reloaded is not None
        assert "Updated content." in reloaded.body

    def test_save_rejects_path_traversal_slug(self, tmp_content_dir: Path) -> None:
        store = Store(str(tmp_content_dir))
        post = Post(metadata={"slug": "../../etc/passwd"}, body="x")
        with pytest.raises(ValueError, match="slug escapes"):
            store.save(post)

    def test_save_uses_lang_subdirectory(self, tmp_content_dir: Path) -> None:
        store = Store(str(tmp_content_dir), default_lang="en")
        post = Post(metadata={"slug": "bonjour", "lang": "fr"}, body="x")
        store.save(post)
        assert os.path.isfile(os.path.join(str(tmp_content_dir), "fr", "bonjour.md"))

    def test_save_uses_root_for_default_language(self, tmp_content_dir: Path) -> None:
        store = Store(str(tmp_content_dir), default_lang="en")
        post = Post(metadata={"slug": "hello-new", "lang": "en"}, body="x")
        store.save(post)
        assert os.path.isfile(os.path.join(str(tmp_content_dir), "hello-new.md"))
        assert not os.path.isfile(os.path.join(str(tmp_content_dir), "en", "hello-new.md"))


class TestDelete:
    def test_delete_post(self, tmp_content_dir: Path) -> None:
        store = Store(str(tmp_content_dir), default_lang="en")
        path = os.path.join(str(tmp_content_dir), "hello.md")
        assert os.path.isfile(path)
        store.delete("hello")
        assert not os.path.isfile(path)


class TestMedia:
    def test_media_file_path_traversal_prevention(self, tmp_content_dir: Path) -> None:
        store = Store(str(tmp_content_dir))
        bad = store.media_file("../etc/passwd")
        assert bad is None

    def test_media_file_nonexistent(self, tmp_content_dir: Path) -> None:
        store = Store(str(tmp_content_dir))
        assert store.media_file("nonexistent.webp") is None


class TestCacheInvalidation:
    def test_mtime_cache_invalidation(self, tmp_content_dir: Path) -> None:
        store = Store(str(tmp_content_dir), default_lang="en")
        initial = len(store.all())

        # Add a new file
        (tmp_content_dir / "new.md").write_text('+++\ntitle = "New"\n+++\n\nBody\n')
        assert len(store.all()) == initial + 1

    def test_cache_invalidation_on_save(self, tmp_content_dir: Path) -> None:
        store = Store(str(tmp_content_dir), default_lang="en")
        initial = len(store.all())
        post = Post(metadata={"slug": "extra"}, body="x")
        store.save(post)
        assert len(store.all()) == initial + 1