#!/usr/bin/env bash
# Applica soft-limit capacity phases su infra/.env (qualità-first).
# Uso (sul server, in /opt/matchlivetv/infra):
#   bash ../scripts/deploy/../infra/scripts/stream_capacity_phase.sh A|B|C
# Fase B/C solo DOPO misure QoS/costi — non saltare.
set -euo pipefail

PHASE="${1:-}"
INFRA="$(cd "$(dirname "$0")/.." && pwd)"
ENV_FILE="${INFRA}/.env"

if [[ ! -f "$ENV_FILE" ]]; then
  echo "Manca $ENV_FILE" >&2
  exit 1
fi

case "$PHASE" in
  A)
    HOME_MAX=4; CLOUD_MAX=6; MAX_NODES=12; BUDGET=150; SOFT_FREE=2; WARM=1; RELAY=6
    ;;
  B)
    HOME_MAX=4; CLOUD_MAX=6; MAX_NODES=22; BUDGET=250; SOFT_FREE=3; WARM=2; RELAY=6
    ;;
  C)
    HOME_MAX=4; CLOUD_MAX=6; MAX_NODES=33; BUDGET=360; SOFT_FREE=4; WARM=2; RELAY=6
    ;;
  *)
    echo "Uso: $0 A|B|C" >&2
    echo "  A → soft ~76 (home4 + 12×6)" >&2
    echo "  B → soft ~136 (dopo misure)" >&2
    echo "  C → soft ~202 (tetto ≥200)" >&2
    exit 1
    ;;
esac

cp -a "$ENV_FILE" "${ENV_FILE}.bak.phase${PHASE}-$(date +%Y%m%d%H%M%S)"

set_kv() {
  local key="$1" val="$2"
  if grep -qE "^${key}=" "$ENV_FILE"; then
    sed -i "s|^${key}=.*|${key}=${val}|" "$ENV_FILE"
  else
    printf '%s=%s\n' "$key" "$val" >> "$ENV_FILE"
  fi
}

set_kv STREAM_NODE_HOME_MAX_PUBLISHERS "$HOME_MAX"
set_kv STREAM_CLOUD_MAX_PUBLISHERS "$CLOUD_MAX"
set_kv STREAM_AUTOSCALE_MAX_NODES "$MAX_NODES"
set_kv STREAM_AUTOSCALE_MONTHLY_BUDGET_EUR "$BUDGET"
set_kv STREAM_AUTOSCALE_SOFT_FREE_SLOTS "$SOFT_FREE"
set_kv STREAM_AUTOSCALE_WARM_SPARE "$WARM"
set_kv RELAY_MAX_CONCURRENT "$RELAY"
set_kv STREAM_AUTOSCALE_QUIET_HOURS "02:00-07:00"
set_kv STREAM_AUTOSCALE_QUIET_TZ "Europe/Rome"
set_kv STREAM_NIGHT_SWEEP_ENABLED "1"

echo "Fase $PHASE applicata su $ENV_FILE"
echo "  home=$HOME_MAX cloud=$CLOUD_MAX max_nodes=$MAX_NODES budget=$BUDGET soft≈$((HOME_MAX + MAX_NODES * CLOUD_MAX))"
echo "Riavvia rails+sidekiq e: rails runner 'Streams::NodeRegistry.ensure_home_from_env!'"