#!/usr/bin/env python3
'''This script reads the "Invoke" Stable Diffusion prompt embedded in files generated by invoke.py'''

import sys
from PIL import Image,PngImagePlugin

if len(sys.argv) < 2:
    print("Usage: file2prompt.py <file1.png> <file2.png> <file3.png>...")
    print("This script opens up the indicated invoke.py-generated PNG file(s) and prints out the prompt used to generate them.")
    exit(-1)

filenames = sys.argv[1:]
for f in filenames:
    try:
        im = Image.open(f)
        try:
            prompt = im.text['Dream']
        except KeyError:
            prompt = ''
        print(f'{f}: {prompt}')
    except FileNotFoundError:
        sys.stderr.write(f'{f} not found\n')
        continue
    except PermissionError:
        sys.stderr.write(f'{f} could not be opened due to inadequate permissions\n')
        continue