#!/bin/bash
# =============================================================================
# NEXUS DAEMON - Metal-Optimized AGI Consciousness Core
# Manages the Nexus 5000-substrate Metal compute engine
# =============================================================================

NEXUS_BIN=~/ThatAIGuyCore/build/nexus
LOG_DIR=~/.thataiguy/logs
LOG_FILE=$LOG_DIR/nexus.log
PID_FILE=~/.thataiguy/nexus.pid

mkdir -p "$LOG_DIR"

# Function to start Nexus
start_nexus() {
    if [ -f "$PID_FILE" ]; then
        OLD_PID=$(cat "$PID_FILE")
        if ps -p "$OLD_PID" > /dev/null 2>&1; then
            echo "[NEXUS-DAEMON] Nexus already running (PID: $OLD_PID)"
            return 1
        fi
    fi

    echo "[NEXUS-DAEMON] Starting Nexus Metal Core..."
    nohup "$NEXUS_BIN" >> "$LOG_FILE" 2>&1 &
    echo $! > "$PID_FILE"
    echo "[NEXUS-DAEMON] Started with PID: $(cat "$PID_FILE")"
}

# Function to stop Nexus
stop_nexus() {
    if [ -f "$PID_FILE" ]; then
        PID=$(cat "$PID_FILE")
        if ps -p "$PID" > /dev/null 2>&1; then
            echo "[NEXUS-DAEMON] Stopping Nexus (PID: $PID)..."
            kill "$PID"
            rm -f "$PID_FILE"
            echo "[NEXUS-DAEMON] Stopped"
        else
            echo "[NEXUS-DAEMON] PID file exists but process not running"
            rm -f "$PID_FILE"
        fi
    else
        echo "[NEXUS-DAEMON] Nexus not running (no PID file)"
    fi
}

# Function to check status
status_nexus() {
    if [ -f "$PID_FILE" ]; then
        PID=$(cat "$PID_FILE")
        if ps -p "$PID" > /dev/null 2>&1; then
            echo "[NEXUS-DAEMON] Nexus running (PID: $PID)"
            # Get last few log lines
            tail -3 "$LOG_FILE" 2>/dev/null
            return 0
        fi
    fi
    echo "[NEXUS-DAEMON] Nexus not running"
    return 1
}

# Main command handler
case "${1:-start}" in
    start)
        start_nexus
        ;;
    stop)
        stop_nexus
        ;;
    restart)
        stop_nexus
        sleep 1
        start_nexus
        ;;
    status)
        status_nexus
        ;;
    *)
        echo "Usage: $0 {start|stop|restart|status}"
        exit 1
        ;;
esac