"""
Manual test to verify that file filtering builds tree from paths, not links.

This test demonstrates that when applying a file filter (e.g., "code" or "docs"),
the tree structure is built from file paths instead of using allLinks, which
prevents orphaned children when parent nodes are filtered out.

To test:
1. Generate a visualization with mixed file types
2. Apply a filter (e.g., "Code" or "Docs")
3. Verify that:
   - Child nodes appear under their correct parent directories
   - No nodes are orphaned at the root level
   - Directory hierarchy is preserved even when some parents are filtered
"""


def test_path_based_tree_building():
    """
    Test case description:

    Before fix:
    - Filter nodes by file type (e.g., only .py files)
    - buildTreeStructure() uses allLinks to establish parent-child
    - If parent directory is filtered out, children become roots
    - Result: Orphaned nodes connected directly to virtual root

    After fix:
    - Filter nodes by file type
    - buildTreeFromPaths() constructs tree from file_path strings
    - Walks up directory hierarchy to find nearest ancestor in filtered set
    - Result: Proper parent-child relationships preserved

    Expected behavior:
    - When filtering to "Code" files:
      - /src/main.py appears under /src directory
      - /src/utils/helper.py appears under /src/utils directory
      - NOT directly under virtual root

    - When filtering to "Docs" files:
      - /docs/api.md appears under /docs directory
      - /docs/guides/tutorial.md appears under /docs/guides directory
      - NOT directly under virtual root
    """
    print("Test: Path-based tree building for filtered views")
    print("-" * 60)
    print()
    print("This is a manual test. To verify:")
    print("1. Run: mcp-vector-search visualize")
    print("2. Click 'Code' filter button")
    print("3. Verify tree structure shows:")
    print("   - Code files under their parent directories")
    print("   - No orphaned files at root level")
    print("   - Proper nesting preserved")
    print()
    print("4. Click 'Docs' filter button")
    print("5. Verify tree structure shows:")
    print("   - Documentation files under their parent directories")
    print("   - No orphaned files at root level")
    print("   - Proper nesting preserved")
    print()
    print("6. Click 'All' filter button")
    print("7. Verify tree structure shows:")
    print("   - All files in complete directory structure")
    print("   - Using link-based buildTreeStructure (original behavior)")
    print()
    print("Expected console output when filtering:")
    print("- 'Using path-based tree building for filtered view'")
    print("- 'Built tree with N root nodes'")
    print("- NO errors about orphaned nodes")
    print()
    print("Expected console output when showing all:")
    print("- 'Using link-based tree building for \"all\" filter'")
    print("- Normal buildTreeStructure debug output")


if __name__ == "__main__":
    test_path_based_tree_building()
