#!/usr/bin/env python3
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# NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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"""Code snippet for outputting all molecule titles from a database."""

import os
import sys

import rich.console
from openeye import oechem


def main() -> int:
    """Output all molecule titles."""
    if len(sys.argv) != 2:  # noqa: PLR2004
        oechem.OEThrow.Usage(f"Usage: {sys.argv[0]} <mol-file>")

    ifs = oechem.oemolistream()
    if not ifs.open(sys.argv[1]):
        oechem.OEThrow.Fatal(f"Unable to open {sys.argv[1]} for reading")

    console = rich.console.Console()
    output_mol_titles(ifs, console)
    return os.EX_OK


def output_mol_titles(ifs: oechem.oemolistream, console: rich.console.Console) -> None:
    """Output all molecule titles from a molecule database."""
    mol_database = oechem.OEMolDatabase(ifs)
    for idx in range(mol_database.GetMaxMolIdx()):
        title = mol_database.GetTitle(idx)
        if len(title) == 0:
            title = "untitled"
        console.print(f"{title}")


if __name__ == "__main__":
    sys.exit(main())