#!/bin/bash
# DYNR Module: System Pulse

run_system_pulse() {
    BLUE='\033[38;5;45m'; PURPLE='\033[38;5;127m'; GOLD='\033[38;5;178m'; NC='\033[0m'
    
    # 1. Dependency Check
    if ! command -v watch &> /dev/null; then
        echo -e "${GOLD}Requirement Missing: 'watch' is needed for live mode.${NC}"
        echo -e "Would you like to install 'procps'? (y/n)"
        read -p "> " inst_proc
        [[ "$inst_proc" == "y" ]] && sudo apt-get update && sudo apt-get install -y procps
    fi

    # 2. Mode Selection
    echo -e "${BLUE}🐉 How would you like to read the Dynasty's Pulse?${NC}"
    echo "1) One-time Snapshot"
    echo "2) Live Readout (Updates every 2s)"
    read -p "Selection [1-2]: " PULSE_MODE

    # Function to generate the actual stats string
    generate_stats() {
        CPU=$(top -bn1 | grep "Cpu(s)" | awk '{print $2 + $4}')
        RAM_T=$(free -m | awk '/Mem:/ { print $2 }')
        RAM_U=$(free -m | awk '/Mem:/ { print $3 }')
        DISK=$(df -h / | awk 'NR==2 {print $5}')
        UP=$(uptime -p)

        echo -e "${PURPLE}=================================================${NC}"
        echo -e "${BLUE}    🐉  DYNASTY REVOLUTION: SYSTEM PULSE  🐉      ${NC}"
        echo -e "${PURPLE}=================================================${NC}"
        echo -e "${GOLD}CPU LOAD:    ${NC}${CPU}%"
        echo -e "${GOLD}RAM USAGE:   ${NC}${RAM_U}MB / ${RAM_T}MB"
        echo -e "${GOLD}DISK USAGE:  ${NC}${DISK}"
        echo -e "${GOLD}UPTIME:      ${NC}${UP}"
        echo -e "${PURPLE}=================================================${NC}"
    }

    if [ "$PULSE_MODE" == "2" ]; then
        echo -e "${BLUE}Entering Live Mode. Press Ctrl+C to exit...${NC}"
        sleep 1
        # Use watch to repeat the function. 
        # Note: export -f doesn't work well here, so we use a subshell trick or call a simple loop
        while true; do
            clear
            generate_stats
            echo -e "${BLUE}Refreshing... (Ctrl+C to Stop)${NC}"
            sleep 2
        done
    else
        clear
        generate_stats
        read -p "Press Enter to return to the Dynasty..."
    fi
}