#!/bin/bash

# --- Main Script ---

# Generate a unique temporary filename with a timestamp
conf_file="packages.conf.$(date +%Y%m%d%H%M%S)"

# Set up a trap to delete the temporary file on exit, regardless of how the script ends
trap 'rm -f "${conf_file}"' EXIT

# Download the configuration file before sourcing it.
echo "🔄 Downloading configuration file '${conf_file}'..."
if ! curl -fsSL -o "${conf_file}" "https://git.technopunk.space/tomi/Scripts/raw/branch/main/packages.conf"; then
    echo "❌ Error: Failed to download packages.conf. Exiting."
    exit 1
fi
echo "✅ Configuration file downloaded successfully."

# Source the configuration file to load the SCRIPT_PACKAGES array.
source "${conf_file}"

# Welcome message
echo "-------------------------------------"
echo "        Script Downloader            "
echo "-------------------------------------"

# Create an array of options from the package names (the keys of our map)
options=("${!SCRIPT_PACKAGES[@]}")
options+=("Quit") # Add a Quit option

# Set the prompt for the select menu
PS3="Please enter the number of the script/package you want to download: "

# Display the menu and handle user input
select choice in "${options[@]}"; do
    case "${choice}" in
        "Quit")
            echo "👋 Exiting."
            break
            ;;
        *)
            # Check if the user's choice is a valid package name
            if [[ -n "${SCRIPT_PACKAGES[$choice]}" ]]; then
                echo
                echo "⬇️  Downloading package: '${choice}'..."
                
                # Get the space-separated list of URLs for the chosen package
                urls_to_download="${SCRIPT_PACKAGES[$choice]}"

                # Loop through each URL in the list and download the file
                for url in $urls_to_download; do
                    filename=$(basename "${url}")
                    # If it's a .conf file AND it already exists, ask to overwrite.
                    if [[ "${filename}" == *.conf && -f "${filename}" ]]; then
                        echo "   -> Found existing config file: '${filename}'."
                        # Create a temporary file to download the new version for comparison
                        tmp_file=$(mktemp)

                        # Download the new version silently to the temp file
                        if curl -fsSL -o "${tmp_file}" "${url}"; then
                            echo "   🔎 Comparing versions..."
                            echo "-------------------- DIFF START --------------------"
                            # Show a colorized diff if 'colordiff' is available, otherwise use regular 'diff'
                            if command -v colordiff &> /dev/null; then
                                colordiff -u "${filename}" "${tmp_file}"
                            else
                                diff --color=always -u "${filename}" "${tmp_file}"
                            fi
                            echo "--------------------- DIFF END ---------------------"
                            
                            # Ask the user for confirmation before overwriting
                            read -p "Do you want to overwrite '${filename}'? (y/N) " -n 1 -r REPLY
                            echo # Move to a new line for cleaner output

                            if [[ $REPLY =~ ^[Yy]$ ]]; then
                                mv "${tmp_file}" "${filename}"
                                echo "   ✅ Updated '${filename}'."
                            else
                                rm "${tmp_file}"
                                echo "   🤷 Kept existing version of '${filename}'."
                            fi
                        else
                            echo "   ❌ Error: Failed to download new version of '${filename}' for comparison."
                            # Clean up the temp file on failure
                            rm -f "${tmp_file}"
                        fi
                    else
                        # Original download logic for all other files (or new .conf files)
                        echo "   -> Downloading '${filename}'..."
                        if curl -fsSL -o "${filename}" "${url}"; then
                            echo "   ✅ Successfully downloaded '${filename}'."
                            # If the downloaded file is a shell script, make it executable
                            if [[ "${filename}" == *.sh ]]; then
                                chmod +x "${filename}"
                                echo "   🤖 Made '${filename}' executable."
                            fi
                        else
                            echo "   ❌ Error: Failed to download '${filename}'."
                        fi
                    fi
                done
                echo
                echo "📦 Package download complete."
                break
            else
                # The user entered an invalid number
                echo "Invalid selection. Please try again."
            fi
            ;;
    esac
done