~/.local/bin/generate-flatpak-launchers.sh

#!/bin/bash

# Directory for launcher scripts
script_dir="$HOME/.local/bin"

# Default operation mode
operation="generate"
dry_run=false

# Display usage information
show_help() {
    echo "Usage: $0 [option]"
    echo "Options:"
    echo "  -h  Display this help message"
    echo "  -r  Remove all generated launcher scripts"
    echo "  -n  Dry run (show actions without executing)"
}

# Remove generated launcher scripts
remove_generated_scripts() {
    echo "Initiating removal of generated launcher scripts..."
    for script in "$script_dir"/*; do
        # Check for the GENERATED-FLATPAK-LAUNCHER tag
        if [[ -f "$script" && $(grep -q "#GENERATED-FLATPAK-LAUNCHER" "$script"; echo $?) -eq 0 ]]; then
            # Ensure the script is not protected by the FLATPAK-LAUNCHER-CREATOR tag
            if ! grep -q "#FLATPAK-LAUNCHER-CREATOR" "$script"; then
                if [[ "$dry_run" == true ]]; then
                    echo "Removing: $script (dry run)"
                else
                    echo "Removing: $script"
                    rm "$script"
                fi
            else
                echo "Skipping: $script (protected)"
            fi
        fi
    done
}

# Parse command-line options
while getopts ":hrn" opt; do
    case ${opt} in
        h)
            show_help
            exit 0
            ;;
        r)
            operation="remove"
            ;;
        n)
            dry_run=true
            ;;
        \?)
            echo "Invalid option: $OPTARG" 1>&2
            show_help
            exit 1
            ;;
    esac
done

# Ensure the script directory exists
mkdir -p "$script_dir"

# Generate launcher script name from Flatpak application ID
generate_script_name() {
    local app_id=$1
    local name_parts IFS='.'
    read -ra name_parts <<< "$app_id"
    local name="${name_parts[-1]}" # Default to the last part

    # If the last part is too generic, use the prior segment that seems descriptive
    #if [[ "$name" == "desktop" || "$name" == "app" || "$name" == "net" ||  "$name" == "Browser" || "$name" == "browser" ]]; then
    #    name="${name_parts[-2]}"
    #fi
    if [[ "${name,,}" =~ ^(desktop|app|net|browser)$ ]]; then
        name="${name_parts[-2]}"
    fi


    # For GitHub projects, prioritize the repository name directly after 'github'
    if [[ "$app_id" =~ github\.([^.]*)\.(.*) ]]; then
        name="${BASH_REMATCH[2]}"
    fi

    # Simplify name by removing common separators and converting to lowercase
    name="${name//-/}"  # Remove dashes
    name="${name//_/}"  # Remove underscores
    echo "${name,,}"    # Convert to lowercase
}

write_launcher_script() {
    local app_id="$1"
    local script_path="$2"

    cat > "$script_path" << EOF
#!/bin/bash
#GENERATED-FLATPAK-LAUNCHER

kdialog --passivepopup "Launching $app_id" 2 &

# Launch the Flatpak application with nohup, outputting to a uniquely named log file in /tmp, and run in the background
nohup flatpak run "$app_id" "\$@" > /tmp/\$(basename "$script_path").\$\$.log 2>&1 &
disown
EOF
    chmod +x "$script_path"
}


generate_or_update_launchers() {
    # Get the maximum length of application IDs
    max_length=$(flatpak list --app --columns=application | awk '{ if (length($0) > max) max = length($0); } END { print max; }')

    flatpak list --app --columns=application | while read app_id; do
        script_name=$(generate_script_name "$app_id")
        script_path="$script_dir/$script_name"

        # Check if the script exists and does NOT contain the GENERATED-FLATPAK-LAUNCHER tag
        if [[ -f "$script_path" && ! $(grep -q "#GENERATED-FLATPAK-LAUNCHER" "$script_path"; echo $?) -eq 0 ]]; then
            echo "Will not overwrite existing script (not generated by this tool): $script_path"
            continue  # Skip to the next app_id
        fi

        # Determine the action message based on the existence and content of script_path
        if [[ -f "$script_path" ]]; then
            action_message="Update"
        else
            action_message="Create"
        fi

        # Pad app_id to the right to ensure it has a fixed length
        printf -v padded_app_id "%-${max_length}s" "$app_id"

        if $dry_run; then
            echo "$action_message (dry run) [$padded_app_id]: $script_path"
        else
            echo "$action_message [$padded_app_id]: $script_path"
            write_launcher_script "$app_id" "$script_path"
        fi
    done
}

# Main operation for generating or updating launcher scripts
if [[ "$operation" == "generate" ]]; then
    generate_or_update_launchers
elif [[ "$operation" == "remove" ]]; then
    remove_generated_scripts
fi

echo "Operation concluded."