--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/0.5.0/bin/get_top_unique_mash_hit_genomes.py	Mon Jun 05 18:48:51 2023 -0400
@@ -0,0 +1,301 @@
+#!/usr/bin/env python3
+
+# Kranti Konganti
+
+import os
+import glob
+import pickle
+import argparse
+import inspect
+import logging
+import re
+import pprint
+from collections import defaultdict
+
+# Multiple inheritence for pretty printing of help text.
+class MultiArgFormatClasses(argparse.RawTextHelpFormatter, argparse.ArgumentDefaultsHelpFormatter):
+    pass
+
+
+# Main
+def main() -> None:
+    """
+    This script works only in the context of `bettercallsal` Nextflow workflow.
+    It takes:
+        1. A pickle file containing a dictionary object where genome accession
+            is the key and the computed serotype is the value.
+        2. A file with `mash screen` results run against the Salmonella SNP
+            Cluster genomes' sketch.
+        3. A directory containing genomes' FASTA in gzipped format where the
+            FASTA file contains 2 lines: one FASTA header followed by
+            genome Sequence.
+    and then generates a concatenated FASTA file of top N unique `mash screen`
+    genome hits as requested.
+    """
+
+    # Set logging.
+    logging.basicConfig(
+        format="\n" + "=" * 55 + "\n%(asctime)s - %(levelname)s\n" + "=" * 55 + "\n%(message)s\n\n",
+        level=logging.DEBUG,
+    )
+
+    # Debug print.
+    ppp = pprint.PrettyPrinter(width=55)
+    prog_name = os.path.basename(inspect.stack()[0].filename)
+
+    parser = argparse.ArgumentParser(
+        prog=prog_name, description=main.__doc__, formatter_class=MultiArgFormatClasses
+    )
+
+    parser.add_argument(
+        "-s",
+        dest="sero_snp_metadata",
+        default=False,
+        required=False,
+        help="Absolute UNIX path to metadata text file with the field separator, | "
+        + "\nand 5 fields: serotype|asm_lvl|asm_url|snp_cluster_id"
+        + "\nEx: serotype=Derby,antigen_formula=4:f,g:-|Scaffold|402440|ftp://...\n|PDS000096654.2\n"
+        + "Mentioning this option will create a pickle file for the\nprovided metadata and exits.",
+    )
+    parser.add_argument(
+        "-fs",
+        dest="force_write_pick",
+        action="store_true",
+        required=False,
+        help="By default, when -s flag is on, the pickle file named *.ACC2SERO.pickle\n"
+        + "is written to CWD. If the file exists, the program will not overwrite\n"
+        + "and exit. Use -fs option to overwrite.",
+    )
+    parser.add_argument(
+        "-m",
+        dest="mash_screen_res",
+        default=False,
+        required=False,
+        help="Absolute UNIX path to `mash screen` results file.",
+    )
+    parser.add_argument(
+        "-ms",
+        dest="mash_screen_res_suffix",
+        default=".screened",
+        required=False,
+        help="Suffix of the `mash screen` result file.",
+    )
+    parser.add_argument(
+        "-ps",
+        dest="pickled_sero",
+        default=False,
+        required=False,
+        help="Absolute UNIX Path to serialized metadata object in a pickle file.\n"
+        + "You can create the pickle file of the metadata using -s option.\n"
+        + "Required if -m is on.",
+    )
+    parser.add_argument(
+        "-gd",
+        dest="genomes_dir",
+        default=False,
+        required=False,
+        help="Absolute UNIX path to a directory containing\n"
+        + "gzipped genome FASTA files.\n"
+        + "Required if -m is on.",
+    )
+    parser.add_argument(
+        "-gds",
+        dest="genomes_dir_suffix",
+        default="_scaffolded_genomic.fna.gz",
+        required=False,
+        help="Genome FASTA file suffix to search for\nin the directory mentioned using\n-gd.",
+    )
+    parser.add_argument(
+        "-n",
+        dest="num_uniq_hits",
+        default=10,
+        help="This many number of serotype genomes' accessions are " + "\nreturned.",
+    )
+    parser.add_argument(
+        "-op",
+        dest="out_prefix",
+        default="MASH_SCREEN",
+        help="Set the output file prefix for .fna.gz and .txt files.",
+    )
+    # required = parser.add_argument_group('required arguments')
+
+    args = parser.parse_args()
+    num_uniq_hits = int(args.num_uniq_hits)
+    mash_screen_res = args.mash_screen_res
+    mash_screen_res_suffix = args.mash_screen_res_suffix
+    pickle_sero = args.sero_snp_metadata
+    pickled_sero = args.pickled_sero
+    f_write_pick = args.force_write_pick
+    genomes_dir = args.genomes_dir
+    genomes_dir_suffix = args.genomes_dir_suffix
+    out_prefix = args.out_prefix
+    mash_genomes_gz = os.path.join(
+        os.getcwd(), out_prefix + "_TOP_" + str(num_uniq_hits) + "_UNIQUE_HITS.fna.gz"
+    )
+    mash_uniq_hits_txt = os.path.join(
+        os.getcwd(), re.sub(".fna.gz", ".txt", os.path.basename(mash_genomes_gz))
+    )
+
+    if mash_screen_res and os.path.exists(mash_genomes_gz):
+        logging.error(
+            "A concatenated genome FASTA file,\n"
+            + f"{os.path.basename(mash_genomes_gz)} already exists in:\n"
+            + f"{os.getcwd()}\n"
+            + "Please remove or move it as we will not "
+            + "overwrite it."
+        )
+        exit(1)
+
+    if os.path.exists(mash_uniq_hits_txt) and os.path.getsize(mash_uniq_hits_txt) > 0:
+        os.remove(mash_uniq_hits_txt)
+
+    if mash_screen_res and (not genomes_dir or not pickled_sero):
+        logging.error("When -m is on, -ps and -gd are also required.")
+        exit(1)
+
+    if genomes_dir:
+        if not os.path.isdir(genomes_dir):
+            logging.error("UNIX path\n" + f"{genomes_dir}\n" + "does not exist!")
+            exit(1)
+        if len(glob.glob(os.path.join(genomes_dir, "*" + genomes_dir_suffix))) <= 0:
+            logging.error(
+                "Genomes directory"
+                + f"{genomes_dir}"
+                + "\ndoes not seem to have any\n"
+                + f"files ending with suffix: {genomes_dir_suffix}"
+            )
+            exit(1)
+
+    if pickle_sero and os.path.exists(pickle_sero) and os.path.getsize(pickle_sero) > 0:
+        acc2serotype = defaultdict()
+        init_pickled_sero = os.path.join(os.getcwd(), out_prefix + ".ACC2SERO.pickle")
+
+        if (
+            os.path.exists(init_pickled_sero)
+            and os.path.getsize(init_pickled_sero)
+            and not f_write_pick
+        ):
+            logging.error(
+                f"File {os.path.basename(init_pickled_sero)} already exists in\n{os.getcwd()}\n"
+                + "Use -fs to force overwrite it."
+            )
+            exit(1)
+
+        with open(pickle_sero, "r") as sero_snp_meta:
+            for line in sero_snp_meta:
+                cols = line.strip().split("|")
+                url_cols = cols[3].split("/")
+
+                if not 4 <= len(cols) <= 5:
+                    logging.error(
+                        f"The metadata file {pickle_sero} is malformed.\n"
+                        + f"Expected 4-5 columns. Got {len(cols)} columns.\n"
+                    )
+                    exit(1)
+
+                if not len(url_cols) > 5:
+                    acc = url_cols[3]
+                else:
+                    acc = url_cols[9]
+
+                if not re.match(r"^GC[AF]\_\d+\.\d+$", acc):
+                    logging.error(
+                        f"Did not find accession in either field number 4\n"
+                        + "or field number 10 of column 4."
+                    )
+                    exit(1)
+
+                acc2serotype[acc] = cols[0]
+
+        with open(init_pickled_sero, "wb") as write_pickled_sero:
+            pickle.dump(file=write_pickled_sero, obj=acc2serotype)
+
+        logging.info(
+            f"Created the pickle file for\n{os.path.basename(pickle_sero)}.\n"
+            + "This was the only requested function."
+        )
+        sero_snp_meta.close()
+        write_pickled_sero.close()
+        exit(0)
+    elif pickle_sero and not (os.path.exists(pickle_sero) and os.path.getsize(pickle_sero) > 0):
+
+        logging.error(
+            "Requested to create pickle from metadata, but\n"
+            + f"the file, {os.path.basename(pickle_sero)} is empty or\ndoes not exist!"
+        )
+        exit(1)
+
+    if mash_screen_res and os.path.exists(mash_screen_res):
+        if os.path.getsize(mash_screen_res) > 0:
+
+            seen_uniq_hits = 0
+            unpickled_acc2serotype = pickle.load(file=open(pickled_sero, "rb"))
+
+            with open(mash_screen_res, "r") as msh_res:
+                mash_hits = defaultdict()
+                seen_mash_sero = defaultdict()
+
+                for line in msh_res:
+                    cols = line.strip().split("\t")
+
+                    if len(cols) < 5:
+                        logging.error(
+                            f"The file {os.path.basename(mash_screen_res)} seems to\n"
+                            + "be malformed. It contains less than required 5-6 columns."
+                        )
+                        exit(1)
+
+                    mash_hit_acc = re.sub(
+                        genomes_dir_suffix,
+                        "",
+                        str((re.search(r"GC[AF].*?" + genomes_dir_suffix, cols[4])).group()),
+                    )
+
+                    if mash_hit_acc:
+                        mash_hits.setdefault(cols[0], []).append(mash_hit_acc)
+                    else:
+                        logging.error(
+                            "Did not find an assembly accession in column\n"
+                            + f"number 5. Found {cols[4]} instead. Cannot proceed!"
+                        )
+                        exit(1)
+            msh_res.close()
+        elif os.path.getsize(mash_screen_res) == 0:
+            failed_sample_name = os.path.basename(mash_screen_res).rstrip(mash_screen_res_suffix)
+            with open(
+                os.path.join(os.getcwd(), "_".join([out_prefix, "FAILED.txt"])), "w"
+            ) as failed_sample_fh:
+                failed_sample_fh.write(f"{failed_sample_name}\n")
+                failed_sample_fh.close()
+            exit(0)
+
+        # ppp.pprint(mash_hits)
+        msh_out_txt = open(mash_uniq_hits_txt, "w")
+        with open(mash_genomes_gz, "wb") as msh_out_gz:
+            for _, (ident, acc_list) in enumerate(sorted(mash_hits.items(), reverse=True)):
+                for acc in acc_list:
+                    if seen_uniq_hits >= num_uniq_hits:
+                        break
+                    if unpickled_acc2serotype[acc] not in seen_mash_sero.keys():
+                        seen_mash_sero[unpickled_acc2serotype[acc]] = 1
+                        seen_uniq_hits += 1
+                        # print(acc.strip() + '\t' + ident + '\t' + unpickled_acc2serotype[acc], file=sys.stdout)
+                        msh_out_txt.write(
+                            f"{acc.strip()}\t{unpickled_acc2serotype[acc]}\t{ident}\n"
+                        )
+                        with open(
+                            os.path.join(genomes_dir, acc + genomes_dir_suffix), "rb"
+                        ) as msh_in_gz:
+                            msh_out_gz.writelines(msh_in_gz.readlines())
+                        msh_in_gz.close()
+        msh_out_gz.close()
+        msh_out_txt.close()
+        logging.info(
+            f"File {os.path.basename(mash_genomes_gz)}\n"
+            + f"written in:\n{os.getcwd()}\nDone! Bye!"
+        )
+        exit(0)
+
+
+if __name__ == "__main__":
+    main()