#!/bin/bash
set -euo pipefail

export NODE_OPTIONS="--max_old_space_size=4096"
export CI="true"
export npm_config_progress="false"
export npm_config_loglevel="warn"
export FORCE_COLOR="0"

LOG_FILE="/var/log/bssapp_deploy.log"
APP_DIR="/opt/bssapp"
LOCK_FILE="/tmp/bssapp_deploy.lock"

build_api_binary() {
  if ! command -v go >/dev/null 2>&1; then
    echo "go command not found; cannot build backend binary."
    return 1
  fi

  cd "$APP_DIR/svc"
  GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -ldflags="-w -s" -o "$APP_DIR/bssapp" ./main.go
  chmod +x "$APP_DIR/bssapp"
  ln -sf "$APP_DIR/bssapp" "$APP_DIR/nerp"
  ln -sf "$APP_DIR/bssapp" "$APP_DIR/start"
}

run_deploy() {
  exec 9>"$LOCK_FILE"
  if ! flock -n 9; then
    echo "[$(date '+%F %T')] Deploy already running. Skipping new request."
    return 0
  fi

  echo "=============================="
  echo "[DEPLOY START] $(date '+%F %T')"
  echo "=============================="

  cd "$APP_DIR"

  echo "== GIT SYNC =="
  git fetch origin
  git reset --hard origin/master
  git clean -fdx -e bssapp -e nerp

  echo "== BUILD UI =="
  cd "$APP_DIR/ui"
  npm ci --no-audit --no-fund --include=optional
  npm run build

  echo "== BUILD API =="
  build_api_binary

  echo "== RESTART SERVICE =="
  systemctl restart bssapp

  echo "[DEPLOY FINISHED] $(date '+%F %T')"
}

if [[ "${1:-}" == "--run" ]]; then
  run_deploy >>"$LOG_FILE" 2>&1
  exit 0
fi

# Fully detach webhook-triggered process to avoid EPIPE from closed request sockets.
nohup /bin/bash "$0" --run </dev/null >/dev/null 2>&1 &
exit 0