"""This is a Python script intended to be used with the "python_scripting.py" cmd2 example application.

To run it you should do the following:
    ./python_scripting.py
    run_pyscript scripts/conditional.py directory_path

Note: The "app" function is defined within the cmd2 embedded Python environment and in there "self" is your cmd2
application instance. Note: self only exists in this environment if self_in_py is True.
"""

import os
import sys

if len(sys.argv) > 1:
    directory = sys.argv[1]
    print(f"Using specified directory: {directory!r}")
else:
    directory = "foobar"
    print(f"Using default directory: {directory!r}")

# Keep track of where we stared
original_dir = os.getcwd()

# Try to change to the specified directory
result = app(f"cd {directory}")

# Conditionally do something based on the results of the last command
if result:
    print(f"STDOUT: {result.stdout}\n")
    print(f"STDERR: {result.stderr}\n")

    print(f"\nContents of directory {directory!r}:")
    result = app("dir -l")

    print(f"STDOUT: {result.stdout}\n")
    print(f"STDERR: {result.stderr}\n")

    print(f"{result.data}\n")

    # Change back to where we were
    print(f"Changing back to original directory: {original_dir!r}")
    app(f"cd {original_dir}")
else:
    # cd command failed, print a warning
    print(f"Failed to change directory to {directory!r}")

    print(f"STDOUT: {result.stdout}\n")
    print(f"STDERR: {result.stderr}\n")