#!/usr/bin/env bash
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
cd "$ROOT"

PROJECT_ID="${RAILWAY_PROJECT_ID:-a6bc4ea7-e89c-42da-819a-8879fb022a0d}"
ENVIRONMENT="${RAILWAY_ENVIRONMENT:-production}"
ENV_FILE="${RAILWAY_ENV_FILE:-$ROOT/.env}"

SERVICE_SELECTOR="all"
MESSAGE=""
SYNC_ENV=false
DRY_RUN=false
DETACH=true

usage() {
  cat <<'USAGE'
Deploy Railway services from this monorepo.

Usage:
  scripts/railway-deploy.sh [all|platform|extraction] [options]

Options:
  --project <id>       Railway project ID (default: $RAILWAY_PROJECT_ID or script default)
  --env <name>         Railway environment name (default: $RAILWAY_ENVIRONMENT or production)
  --message <msg>      Deployment message
  --sync-env           Sync variables from .env before deploying (uses railway-sync-env.sh)
  --env-file <path>    Env file path used when --sync-env is set (default: ./.env)
  --attach             Attach to deployment logs instead of detached mode
  --dry-run            Print what would run without deploying
  -h, --help           Show help

Examples:
  scripts/railway-deploy.sh all
  scripts/railway-deploy.sh extraction --message "hotfix: parser"
  scripts/railway-deploy.sh platform --sync-env --env-file .env
USAGE
}

if [[ $# -gt 0 && "${1#-}" == "$1" ]]; then
  SERVICE_SELECTOR="$1"
  shift
fi

while [[ $# -gt 0 ]]; do
  case "$1" in
    --project)
      PROJECT_ID="${2:-}"
      shift 2
      ;;
    --env)
      ENVIRONMENT="${2:-}"
      shift 2
      ;;
    --message)
      MESSAGE="${2:-}"
      shift 2
      ;;
    --sync-env)
      SYNC_ENV=true
      shift
      ;;
    --env-file)
      ENV_FILE="${2:-}"
      shift 2
      ;;
    --attach)
      DETACH=false
      shift
      ;;
    --dry-run)
      DRY_RUN=true
      shift
      ;;
    -h|--help)
      usage
      exit 0
      ;;
    *)
      echo "Unknown arg: $1" >&2
      usage
      exit 2
      ;;
  esac
done

SERVICES=()
case "$SERVICE_SELECTOR" in
  all)
    SERVICES=("platform-service" "extraction-service")
    ;;
  platform|platform-service)
    SERVICES=("platform-service")
    ;;
  extraction|extraction-service)
    SERVICES=("extraction-service")
    ;;
  *)
    echo "Unknown service selector: $SERVICE_SELECTOR" >&2
    usage
    exit 2
    ;;
esac

if [[ -z "$PROJECT_ID" ]]; then
  echo "Missing Railway project ID. Use --project or set RAILWAY_PROJECT_ID." >&2
  exit 2
fi

if [[ -z "$ENVIRONMENT" ]]; then
  echo "Missing Railway environment. Use --env or set RAILWAY_ENVIRONMENT." >&2
  exit 2
fi

if [[ -z "$MESSAGE" ]]; then
  if command -v git >/dev/null 2>&1 && git rev-parse --git-dir >/dev/null 2>&1; then
    sha="$(git rev-parse --short HEAD 2>/dev/null || true)"
    dirty=""
    if [[ -n "$(git status --porcelain 2>/dev/null || true)" ]]; then
      dirty=" (dirty)"
    fi
    MESSAGE="deploy ${sha}${dirty}"
  else
    MESSAGE="deploy $(date -u +%Y-%m-%dT%H:%M:%SZ)"
  fi
fi

if ! command -v railway >/dev/null 2>&1; then
  echo "railway CLI not found. Install with: npm i -g @railway/cli" >&2
  exit 1
fi

if [[ "$DRY_RUN" == false ]]; then
  if ! railway whoami >/dev/null 2>&1; then
    echo "Railway CLI is not authenticated. Run: railway login" >&2
    exit 1
  fi
fi

if [[ "$SYNC_ENV" == true ]]; then
  sync_cmd=(
    "scripts/railway-sync-env.sh"
    "$SERVICE_SELECTOR"
    "--project" "$PROJECT_ID"
    "--env" "$ENVIRONMENT"
    "--env-file" "$ENV_FILE"
  )

  if [[ "$DRY_RUN" == true ]]; then
    sync_cmd+=("--dry-run")
  fi

  echo "Syncing variables before deployment..."
  "${sync_cmd[@]}"
fi

for svc in "${SERVICES[@]}"; do
  cmd=(railway up -p "$PROJECT_ID" -e "$ENVIRONMENT" -s "$svc" -m "$MESSAGE")
  if [[ "$DETACH" == true ]]; then
    cmd+=(-d)
  fi

  if [[ "$DRY_RUN" == true ]]; then
    printf 'DRY RUN:'
    printf ' %q' "${cmd[@]}"
    printf '\n'
    continue
  fi

  echo "Deploying $svc (project=$PROJECT_ID, env=$ENVIRONMENT)..."
  "${cmd[@]}"
done

echo "Deployment command(s) submitted."
echo "To verify status quickly:"
echo "  railway link --project $PROJECT_ID --environment $ENVIRONMENT"
echo "  railway service status -a -e $ENVIRONMENT"