#!/bin/bash

# ---
# A script to delete files in a target directory if they also exist in a reference directory.
# ---

# Exit immediately if a command exits with a non-zero status.
set -e

# Check if the correct number of arguments (two folders) was provided.
if [ "$#" -ne 2 ]; then
    echo "Error: You must provide two directory paths."
    echo "Usage: $0 <target_directory> <reference_directory>"
    echo "  - target_directory: The folder FROM WHICH to delete files."
    echo "  - reference_directory: The folder used as a reference FOR deletion."
    exit 1
fi

TARGET_DIR="$1"
REFERENCE_DIR="$2"

# Check that both arguments are actual directories.
if [ ! -d "$TARGET_DIR" ]; then
    echo "Error: Target directory '$TARGET_DIR' does not exist."
    exit 1
fi

if [ ! -d "$REFERENCE_DIR" ]; then
    echo "Error: Reference directory '$REFERENCE_DIR' does not exist."
    exit 1
fi

echo "Scanning for files in '$TARGET_DIR' to delete based on the contents of '$REFERENCE_DIR'..."
echo "------------------------------------------------------------------"

# Loop through every file in the reference directory.
# This method correctly handles filenames that may contain spaces or special characters.
find "$REFERENCE_DIR" -type f -print0 | while IFS= read -r -d '' reference_file; do
    
    # Get just the filename from the path.
    filename=$(basename "$reference_file")
    
    # Create the full path for the corresponding file in the target directory.
    target_file_path="$TARGET_DIR/$filename"
    
    # Check if that file actually exists in the target directory.
    if [ -f "$target_file_path" ]; then
        echo "Found match. Deleting: $target_file_path"
        # The actual delete command.
        rm "$target_file_path"
    fi
done

echo "------------------------------------------------------------------"
echo "Script finished."