#!/bin/bash

# Script Documentation
print_help() {
    cat << EOF
Usage: $(basename "$0") [OPTIONS]

This script allows you to select a directory from a predefined list of common
paths and change to that directory. You can also add the current directory to
the list of common paths or copy the selected directory path to the clipboard.

Options:
  -h, --help    Show this help message and exit
  -a, --add     Add the current directory to the common paths file
  -c, --copy    Copy the selected directory path to the clipboard instead of changing to it

Example:
  $(basename "$0")
  $(basename "$0") -a
  $(basename "$0") -c

EOF
}

# Determine the directory of the script
script_dir="$(dirname "$(realpath "$0")")"
common_paths_file="$script_dir/common_paths.txt"

# Check if fzf is installed
if ! command -v fzf &> /dev/null; then
    echo "fzf is not available on this system, please install it first"
    exit 1
fi

# Check if xclip or pbcopy is installed for clipboard copy
if ! command -v xclip &> /dev/null && ! command -v pbcopy &> /dev/null; then
    echo "xclip or pbcopy is required for clipboard copy, please install one of them first"
    exit 1
fi

# Parse command-line options
add_current_dir=false
copy_to_clipboard=false

while [[ "$1" =~ ^- ]]; do
    case "$1" in
        -h|--help)
            print_help
            exit 0
            ;;
        -a|--add)
            add_current_dir=true
            shift
            ;;
        -c|--copy)
            copy_to_clipboard=true
            shift
            ;;
        *)
            echo "Unknown option: $1"
            print_help
            exit 1
            ;;
    esac
done

# Add the current directory to the common paths file if requested
if $add_current_dir; then
    current_dir=$(pwd)
    if grep -q "^$current_dir$" "$common_paths_file"; then
        echo "The current directory is already in the common paths list."
    else
        echo "$current_dir" >> "$common_paths_file"
        echo "Added the current directory to the common paths list."
    fi
    exit 0
fi

# Check if the common paths file exists
if [[ ! -f "$common_paths_file" ]]; then
    echo "Error: The file '$common_paths_file' does not exist."
    exit 1
fi

# Use fzf to select a directory from the file
selected_path=$(cat "$common_paths_file" | fzf --prompt="Select a directory: ")

if [[ -z "$selected_path" ]]; then
    echo "No directory selected, exiting..."
    exit 1
fi

# Expand the ~ symbol in the selected path
expanded_path=$(eval echo "$selected_path")

# Copy to clipboard if requested
if $copy_to_clipboard; then
    if command -v xclip &> /dev/null; then
        echo -n "$expanded_path" | xclip -selection clipboard
    elif command -v pbcopy &> /dev/null; then
        echo -n "$expanded_path" | pbcopy
    fi
    echo "Copied $expanded_path to the clipboard."
    exit 0
fi

# Change to the selected directory
echo "Changing directory to: $expanded_path"
cd "$expanded_path" || exit

# Optionally, you might want to open a shell in the selected directory
exec bash