#!/usr/bin/env python3

"""
Example: Validate manifest and downloaded files.
"""

from pathlib import Path

from tcga_downloader.manifest import (
    load_manifest,
    validate_files_against_manifest,
    validate_manifest,
)


def main():
    manifest_path = Path("manifest.tsv")
    data_dir = Path("data")

    print("Loading manifest...")
    records = load_manifest(manifest_path)

    print(f"Loaded {len(records)} records from manifest")

    print("\nValidating manifest structure...")
    errors = validate_manifest(records)

    if errors:
        print("Manifest validation errors found:")
        for error in errors:
            print(f"  - {error}")
    else:
        print("Manifest structure is valid!")

    if data_dir.exists():
        print("\nValidating downloaded files against manifest...")
        missing, checksum_errors = validate_files_against_manifest(records, data_dir)

        if missing:
            print(f"\nMissing files ({len(missing)}):")
            for filename in missing[:10]:
                print(f"  - {filename}")
            if len(missing) > 10:
                print(f"  ... and {len(missing) - 10} more")

        if checksum_errors:
            print(f"\nChecksum errors ({len(checksum_errors)}):")
            for error in checksum_errors[:10]:
                print(f"  - {error}")
            if len(checksum_errors) > 10:
                print(f"  ... and {len(checksum_errors) - 10} more")

        if not missing and not checksum_errors:
            print("\nAll files are present and checksums match!")
        else:
            print("\nValidation failed. Please re-download missing files.")
    else:
        print(f"\nData directory {data_dir} does not exist. Skipping file validation.")


if __name__ == "__main__":
    main()