import argparse
import sys

from db_diff.check import db_check_diff
from deps_status.check import deps_status_check, subprocess_cmd


assert sys.version_info >= (
    3,
    7,
), "Python version is too low, please load a python >= 3.7"


def parse_args():
    parser = argparse.ArgumentParser(
        description="A python project to analyse Pmodules modules and their status changes."
    )
    parser.add_argument(
        "-d",
        "--deps-check",
        action="store_true",
        help="Check for module dependencies status and change their status accordingly.",
    )
    parser.add_argument(
        "-w",
        "--db-check",
        action="store_true",
        help="Report new, deleted or changed modules, write it to the database and print changes to pmodules_changes.md.",
    )
    parser.add_argument(
        "--select-module",
        default="",
        help="Select a subtype of module which should be checked for. Default is all.",
    )

    args = parser.parse_args()
    return args


def main():
    # Analyse CLI args
    cli_args = parse_args()

    # Global variables
    Pmodules_db_path = "/opt/psi/var/cache/pmodules_db/"
    Pmodules_states = [" stable", " unstable", " deprecated"]

    # Main search to analyse
    module_cmd = (
        "$PMODULES_HOME/bin/modulecmd bash search -a "
        + cli_args.select_module
        + " --all-deps --no-header"
    )
    module_cmd_process = subprocess_cmd(module_cmd)

    # Check for Pmodules addition, deletion or changes of state
    if cli_args.db_check:
        db_check_diff(module_cmd_process.stderr, Pmodules_db_path, Pmodules_states)

    # Check for module dependencies status and change the main module status accordingly
    if cli_args.deps_check:
        deps_status_check(module_cmd_process)


if __name__ == "__main__":
    main()