#!/usr/bin/env python3
import sys
from PyPDF2 import PdfMerger

def merge_pdfs(output_path, input_paths):
    merger = PdfMerger()
    for pdf in input_paths:
        try:
            merger.append(pdf)
            print(f"Added: {pdf}")
        except FileNotFoundError:
            print(f"Error: File not found - {pdf}")
        except Exception as e:
            print(f"Error adding {pdf}: {e}")
    merger.write(output_path)
    merger.close()
    print(f"Merged PDF saved as: {output_path}")

if __name__ == "__main__":
    if len(sys.argv) < 4:
        print("Usage: python merge_pdfs.py output.pdf file1.pdf file2.pdf [file3.pdf ...]")
        sys.exit(1)

    output_pdf = sys.argv[1]
    input_pdfs = sys.argv[2:]
    merge_pdfs(output_pdf, input_pdfs)