#!/bin/bash
# TAK Server Version Detection Script
set -e

# Find the latest takserver-docker-X.Y-RELEASE-Z.zip file
find_latest_tak_release() {
    local takserver_dir="$1"
    
    if [ ! -d "$takserver_dir" ]; then
        echo "ERROR: Directory $takserver_dir does not exist"
        return 1
    fi
    
    local latest_zip=$(find "$takserver_dir" -name "takserver-docker-*-RELEASE-*.zip" -type f | \
        sed -n 's/.*takserver-docker-\([0-9]\+\.[0-9]\+\)-RELEASE-\([0-9]\+\)\.zip/\1.\2 &/p' | \
        sort -V | tail -1 | cut -d' ' -f2-)
    
    if [ -z "$latest_zip" ]; then
        echo "ERROR: No takserver-docker-X.Y-RELEASE-Z.zip file found in $takserver_dir"
        return 1
    fi
    
    echo "$latest_zip"
}

# Extract version information
get_tak_version() {
    local zip_file="$1"
    local version=$(basename "$zip_file" | sed -n 's/takserver-docker-\([0-9]\+\.[0-9]\+\)-RELEASE-\([0-9]\+\)\.zip/\1-\2/p')
    echo "$version"
}

# List all available TAK releases
list_tak_releases() {
    local takserver_dir="$1"
    
    echo "Available TAK server releases:"
    find "$takserver_dir" -name "takserver-docker-*-RELEASE-*.zip" -type f | while read -r file; do
        local version=$(get_tak_version "$file")
        echo "  - $(basename "$file") (version: $version)"
    done
}

# Main execution if script is run directly
if [ "${BASH_SOURCE[0]}" == "${0}" ]; then
    TAKSERVER_DIR="${1:-/takserver-zip}"
    
    case "${2:-latest}" in
        "latest")
            find_latest_tak_release "$TAKSERVER_DIR"
            ;;
        "list")
            list_tak_releases "$TAKSERVER_DIR"
            ;;
        "version")
            if [ -n "$3" ]; then
                get_tak_version "$3"
            else
                echo "Usage: $0 <dir> version <zip_file>"
                exit 1
            fi
            ;;
        *)
            echo "Usage: $0 <directory> [latest|list|version <zip_file>]"
            exit 1
            ;;
    esac
fi