#!/usr/bin/env bash
# ps.sh — muestra procesos de agentes con detalles (PID, uptime, memoria, CPU)
#
# Uso:
#   ./dev-scripts/ps.sh                  # todos los agentes corriendo
#   ./dev-scripts/ps.sh assistant-bot    # uno específico

source "$(dirname "$0")/_common.sh"

TARGET="${1:-}"
found=0

# Cabecera
printf "%-22s  %-8s  %-12s  %-10s  %-8s  %s\n" \
  "AGENT" "PID" "UPTIME" "MEM (RSS)" "CPU %" "LOG SIZE"
printf '%s\n' "$(printf '─%.0s' {1..78})"

while IFS='|' read -r id _version _enabled _desc _cfg; do
  [[ -n "$TARGET" && "$id" != "$TARGET" ]] && continue

  if ! is_running "$id"; then
    if [[ -n "$TARGET" ]]; then
      printf "%-22s  ${DIM}%-8s${RST}\n" "$id" "stopped"
    fi
    continue
  fi

  pid="$(read_pid "$id")"
  ((found++)) || true

  # Uptime: calcular desde el inicio del proceso
  if [[ -f /proc/$pid/stat ]]; then
    start_ticks=$(awk '{print $22}' /proc/$pid/stat 2>/dev/null || echo 0)
    clk_tck=$(getconf CLK_TCK)
    boot_time=$(awk '/btime/{print $2}' /proc/stat)
    proc_start=$((boot_time + start_ticks / clk_tck))
    now=$(date +%s)
    elapsed=$((now - proc_start))
    days=$((elapsed / 86400))
    hours=$(( (elapsed % 86400) / 3600 ))
    mins=$(( (elapsed % 3600) / 60 ))
    if [[ $days -gt 0 ]]; then
      uptime="${days}d ${hours}h"
    elif [[ $hours -gt 0 ]]; then
      uptime="${hours}h ${mins}m"
    else
      uptime="${mins}m"
    fi
  else
    uptime="n/a"
  fi

  # Memoria RSS y CPU desde ps
  read -r mem_kb cpu_pct < <(ps -p "$pid" -o rss=,pcpu= 2>/dev/null || echo "0 0")
  if [[ "$mem_kb" -gt 1048576 ]]; then
    mem="$(( mem_kb / 1048576 )) GB"
  elif [[ "$mem_kb" -gt 1024 ]]; then
    mem="$(( mem_kb / 1024 )) MB"
  else
    mem="${mem_kb} KB"
  fi

  # Tamaño del log
  log="$(log_file "$id")"
  if [[ -f "$log" ]]; then
    log_bytes=$(stat -c%s "$log" 2>/dev/null || echo 0)
    if [[ "$log_bytes" -gt 1048576 ]]; then
      log_size="$(( log_bytes / 1048576 )) MB"
    elif [[ "$log_bytes" -gt 1024 ]]; then
      log_size="$(( log_bytes / 1024 )) KB"
    else
      log_size="${log_bytes} B"
    fi
  else
    log_size="-"
  fi

  printf "%-22s  ${GRN}%-8s${RST}  %-12s  %-10s  %-8s  %s\n" \
    "$id" "$pid" "$uptime" "$mem" "${cpu_pct}%" "$log_size"

done < <(list_agents_raw)

if [[ "$found" -eq 0 ]]; then
  if [[ -n "$TARGET" ]]; then
    fail "Agente '$TARGET' no está corriendo."
  else
    dim "  No hay agentes corriendo."
  fi
fi