#!/bin/bash

# Check if enough arguments are passed
if [ "$#" -ne 1 ]; then
    echo "Usage: $0 <file_path>"
    exit 1
fi

# Function to truncate filename to a maximum length, preserving the extension
truncate_filename() {
    local filename="$1"
    local max_length="$2"
    local extension="${filename##*.}"
    local base_name="${filename%.*}"
    
    if [ ${#filename} -gt $max_length ]; then
        local truncated_base="${base_name:0:($max_length - ${#extension} - 1)}"
        echo "${truncated_base}.${extension}"
    else
        echo "$filename"
    fi
}

# Read the file paths from the input file
while IFS= read -r file_path; do
    # Extract the directory and filename
    dir_path=$(dirname "$file_path")
    file_name=$(basename "$file_path")

    # Define the new filename by replacing or removing illegal characters
    new_file_name=$(echo "$file_name" | tr -d '<>:"/\\|?*' | tr '[:cntrl:]' '_' | sed 's/[—·]/-/g' | sed 's/"/_/g' | sed "s/'/_/g")

    # Ensure filename does not end with an underscore
    new_file_name=$(echo "$new_file_name" | sed 's/_$//')

    # Truncate the filename if it is longer than 200 characters, preserving the extension
    new_file_name=$(truncate_filename "$new_file_name" 200)

    # Construct the new path
    new_path="$dir_path/$new_file_name"

    # Rename the file if necessary
    if [ "$new_file_name" != "$file_name" ]; then
        echo "Renaming '$file_path' to '$new_path'"
        mv "$file_path" "$new_path"
    fi
done <"$1"