# tests/test_indexer_advanced.py — Tests for indexer CRUD operations and hooks
import asyncio
from pathlib import Path

import pytest

from backend.indexer import (
    index,
    vault_config,
    _file_lookup,
    path_index,
    _index_generation,
    _on_index_change,
    _add_file_to_structures,
    _remove_file_from_structures,
    update_single_file,
    remove_single_file,
    handle_file_move,
    _index_single_file_sync,
    _ensure_parent_dirs_in_path_index,
    find_file_in_index,
    get_vault_names,
    set_index_change_hook,
    _scan_vault,
    build_index,
)


# ═══════════════════════════════════════════════════════════════════
# Hook system
# ═══════════════════════════════════════════════════════════════════

class TestIndexChangeHook:
    def test_set_and_call_hook(self, client):
        """Hook fires when adding/removing files from the index."""
        calls = []
        def hook(action, vault, path, file_info):
            calls.append((action, vault, path))

        set_index_change_hook(hook)
        path = "hook_test_12345.md"
        file_info = {
            "path": path,
            "title": "Hook Test",
            "tags": ["test"],
            "content": "# Hook Test",
            "content_preview": "# Hook",
            "size": 100,
            "modified": "2024-01-01T00:00:00Z",
            "extension": ".md",
        }
        _add_file_to_structures("TestVault", file_info)
        _remove_file_from_structures("TestVault", path)

        # Hook should have been called at least twice (add + remove)
        assert len(calls) >= 2, f"Hook calls: {calls}"
        assert calls[0][0] == "add"
        assert calls[1][0] == "remove"

        # Reset hook
        set_index_change_hook(None)


# ═══════════════════════════════════════════════════════════════════
# File CRUD operations
# ═══════════════════════════════════════════════════════════════════

class TestFileCRUD:
    def test_index_single_file_sync(self, test_vault_dir):
        vault_path = test_vault_dir
        file_path = Path(vault_path) / "note1.md"
        info = _index_single_file_sync("TestVault", vault_path, str(file_path))
        assert info is not None
        assert info["path"] == "note1.md"
        assert "title" in info
        assert "tags" in info
        assert "content" in info

    def test_index_single_file_sync_nonexistent(self, test_vault_dir):
        info = _index_single_file_sync("TestVault", test_vault_dir, "/nonexistent/file.md")
        assert info is None

    def test_index_single_file_sync_unsupported(self, test_vault_dir):
        bin_file = Path(test_vault_dir) / "test_image.png"
        bin_file.write_bytes(b"fake png data")
        info = _index_single_file_sync("TestVault", test_vault_dir, str(bin_file))
        assert info is None

    def test_add_and_remove_file(self, client):
        path = "crud_test_unique_12345.md"
        file_info = {
            "path": path,
            "title": "CRUD Test",
            "tags": ["unittest"],
            "content": "# Test",
            "content_preview": "# T",
            "size": 50,
            "modified": "2024-01-01T00:00:00Z",
            "extension": ".md",
        }
        try:
            _add_file_to_structures("TestVault", file_info)
            assert find_file_in_index(path, "TestVault") is not None
        finally:
            _remove_file_from_structures("TestVault", path)
        assert find_file_in_index(path, "TestVault") is None

    def test_remove_nonexistent_file(self, client):
        removed = _remove_file_from_structures("TestVault", "crud_nonexistent_12345.md")
        assert removed is None

    def test_remove_from_nonexistent_vault(self):
        removed = _remove_file_from_structures("FakeVault", "test.md")
        assert removed is None

    def test_add_file_to_nonexistent_vault(self):
        old_gen = _index_generation
        _add_file_to_structures("FakeVaultXYZ", {"path": "x.md", "title": "X", "tags": [], "content": "", "content_preview": "", "size": 0, "modified": "", "extension": ".md"})
        assert _index_generation == old_gen

    def test_ensure_parent_dirs(self, client):
        """_ensure_parent_dirs_in_path_index creates missing directory entries."""
        if "TestVault" not in path_index:
            path_index["TestVault"] = []
        existing = set(p["path"] for p in path_index["TestVault"])
        _ensure_parent_dirs_in_path_index("TestVault", "a/b/c/file.md", existing)
        paths = [p["path"] for p in path_index["TestVault"]]
        assert "a" in paths or "a" in [p["path"] for p in path_index.get("TestVault", [])]


# ═══════════════════════════════════════════════════════════════════
# Path index and lookup
# ═══════════════════════════════════════════════════════════════════

class TestPathIndex:
    def test_path_index_has_entries(self, client):
        assert "TestVault" in path_index
        paths = [p["path"] for p in path_index["TestVault"]]
        assert len(paths) > 0

    def test_path_index_has_files_and_dirs(self, client):
        entries = path_index["TestVault"]
        file_entries = [e for e in entries if e["type"] == "file"]
        dir_entries = [e for e in entries if e["type"] == "directory"]
        assert len(file_entries) > 0
        assert len(dir_entries) > 0


# ═══════════════════════════════════════════════════════════════════
# File lookup — _file_lookup
# ═══════════════════════════════════════════════════════════════════

class TestFileLookup:
    def test_lookup_contains_files(self, client):
        assert len(_file_lookup) > 0

    def test_find_file_by_name(self, client):
        result = find_file_in_index("note1.md", "TestVault")
        assert result is not None
        assert result["vault"] == "TestVault"

    def test_find_file_in_subdirectory(self, client):
        result = find_file_in_index("Projets/projet.md", "TestVault")
        assert result is not None
        assert "projet" in result["path"]


# ═══════════════════════════════════════════════════════════════════
# Index generation counter
# ═══════════════════════════════════════════════════════════════════

class TestIndexGeneration:
    def test_generation_starts_positive(self):
        assert isinstance(_index_generation, int)
        assert _index_generation >= 0

    def test_generation_increments_on_add(self, client):
        old = _index_generation
        _add_file_to_structures("TestVault", {
            "path": "gen_test2.md",
            "title": "Gen2",
            "tags": [],
            "content": "",
            "content_preview": "",
            "size": 0,
            "modified": "2024-01-01T00:00:00Z",
            "extension": ".md",
        })
        new_gen = _index_generation
        # Clean up
        _remove_file_from_structures("TestVault", "gen_test2.md")
        # Generation should have incremented (at least stayed same if cleanup failed)
        assert new_gen >= old