#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# SPDX-License-Identifier: Apache-2.0
# Copyright Pionix GmbH and Contributors to EVerest
#
"""
author: andreas.heinrich@pionix.de
This script checks whether a directory exists or not and returns zero based on the flags provided.
"""


import argparse
from pathlib import Path


def main():
    parser = argparse.ArgumentParser(description='Checks whether a directory exists or not and returns zero based on the flags provided')
    parser.add_argument(
        '--directory',
        type=Path,
        dest='directory',
        action='store',
        required=False,
        help='Directory to check for existence'
    )
    parser.add_argument(
        '--file',
        type=Path,
        dest='file',
        action='store',
        required=False,
        help='Path to a file to check for existence'
    )
    parser.add_argument(
        '--return-zero-if-exists',
        action='store_true',
        help='Return zero if the file/directory exists',
        dest='return_zero_if_exists',
    )
    parser.add_argument(
        '--return-zero-if-not-exists',
        action='store_true',
        help='Return zero if the file/directory does not exist',
        dest='return_zero_if_not_exists',
    )
    args = parser.parse_args()

    if not args.directory and not args.file:
        raise ValueError("Either --directory or --file must be specified")
    if args.return_zero_if_exists and args.return_zero_if_not_exists:
        raise ValueError("Cannot use both --return-zero-if-exists and --return-zero-if-not-exists at the same time")

    if args.file:
        if not args.file.is_absolute():
            raise ValueError("File path must be absolute")
        if args.return_zero_if_exists:
            if not args.file.exists():
                print(f"❌ File does not exist at {args.file}")
                exit(1)
            if not args.file.is_file():
                print(f"❌ Path exists but is not a file at {args.file}")
                exit(2)
            print(f"✅ File exists at {args.file}")
            exit(0)
        elif args.return_zero_if_not_exists:
            if args.file.is_file():
                print(f"❌ File exists at {args.file}")
                exit(1)
            if args.file.exists():
                print(f"❌ Path exists but is not a file at {args.file}")
                exit(2)
            print(f"✅ File does not exist at {args.file}")
            exit(0)
        else:
            raise ValueError("Either --return-zero-if-exists or --return-zero-if-not-exists must be specified")
    else:
        if not args.directory.is_absolute():
            raise ValueError("Directory path must be absolute")
        if args.return_zero_if_exists:
            if not args.directory.exists():
                print(f"❌ Directory does not exist at {args.directory}")
                exit(1)
            if not args.directory.is_dir():
                print(f"❌ Path exists but is not a directory at {args.directory}")
                exit(2)
            print(f"✅ Directory exists at {args.directory}")
            exit(0)
        elif args.return_zero_if_not_exists:
            if args.directory.is_dir():
                print(f"❌ Directory exists at {args.directory}")
                exit(1)
            if args.directory.exists():
                print(f"❌ Path exists but is not a directory at {args.directory}")
                exit(2)
            print(f"✅ Directory does not exist at {args.directory}")
            exit(0)
        else:
            raise ValueError("Either --return-zero-if-exists or --return-zero-if-not-exists must be specified")


if __name__ == "__main__":
    try:
        main()
    except Exception as e:
        print(f"Error: {e}")
        exit(1)