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

# Deploy source code to the production server via rsync.
#
# Usage:
#   # Full deploy (sync entire project)
#   ./scripts/rsync-deploy.sh
#   ./scripts/rsync-deploy.sh --dry-run
#
#   # Deploy a specific directory
#   ./scripts/rsync-deploy.sh src/
#   ./scripts/rsync-deploy.sh src/payload/
#
#   # Deploy one or more files
#   ./scripts/rsync-deploy.sh src/payload/globals/Homepage.ts
#   ./scripts/rsync-deploy.sh src/payload/globals/Homepage.ts src/app/sitemap.ts
#
#   # Mix directories and files
#   ./scripts/rsync-deploy.sh src/migrations/ src/payload/globals/Homepage.ts
#
# Options:
#   --dry-run, -n    Show what would be transferred without making changes
#   --target HOST    SSH target (default: luxsin-website or $DEPLOY_TARGET)
#   --port PORT      SSH port (default: 22 or $SSH_PORT)
#   --delete         Enable --delete for specific-path syncs (full deploy always uses --delete)
#   --help, -h       Show this help message
#
# Environment variables:
#   DEPLOY_TARGET  SSH target (default: luxsin-website)
#   REMOTE_DIR     Remote project root (default: /data/project/eversolo-app)
#   SSH_PORT       Custom SSH port (default: 22)

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

DEPLOY_TARGET="${DEPLOY_TARGET:-luxsin-website}"
REMOTE_DIR="${REMOTE_DIR:-/data/project/eversolo-app}"
SSH_PORT="${SSH_PORT:-22}"
DRY_RUN=0
FORCE_DELETE=0
PATHS=()

# ── Parse arguments ──────────────────────────────────────────────
while [[ $# -gt 0 ]]; do
  case "$1" in
    --dry-run|-n)
      DRY_RUN=1
      shift
      ;;
    --target|-t)
      DEPLOY_TARGET="$2"
      shift 2
      ;;
    --port|-p)
      SSH_PORT="$2"
      shift 2
      ;;
    --delete)
      FORCE_DELETE=1
      shift
      ;;
    --help|-h)
      sed -n '3,/^$/p' "$0" | sed 's/^# \{0,1\}//'
      exit 0
      ;;
    --*)
      echo "ERROR: Unknown option: $1" >&2
      exit 1
      ;;
    *)
      PATHS+=("$1")
      shift
      ;;
  esac
done

# ── Verify rsync is available ────────────────────────────────────
if ! command -v rsync >/dev/null 2>&1; then
  echo "ERROR: rsync is not installed." >&2
  exit 1
fi

SSH_CMD="ssh -p ${SSH_PORT}"

# ── Full-deploy excludes ─────────────────────────────────────────
#  Only upload files needed to build and run the Docker deployment.
#  Server-managed files (.env, data/, media/, etc.) are excluded and
#  will NOT be deleted by --delete on the remote.
FULL_EXCLUDES=(
  # Build artifacts
  --exclude='.next/'
  --exclude='.next-dev/'
  --exclude='.turbo/'
  --exclude='tsconfig.tsbuildinfo'
  --exclude='out/'

  # Dependencies (installed on server via npm ci / Docker)
  --exclude='node_modules/'

  # Environment files (managed on server)
  --exclude='.env'
  --exclude='.env.*'

  # Server-managed data and uploads
  --exclude='data/'
  --exclude='media/'
  --exclude='files/'
  --exclude='videos/'
  --exclude='public/'

  # Local build / packaging artifacts
  --exclude='deploy-packages/'
  --exclude='output/'
  --exclude='tmp-*'
  --exclude='*.log'
  --exclude='*.tar.gz'
  --exclude='*.tgz'
  --exclude='*.dump'

  # Documentation (not needed for runtime)
  --exclude='docs/'
  --exclude='*.md'

  # Cloudflare deployment (not used in Docker deployment)
  --exclude='cloudflare/'
  --exclude='Dockerfile.cloudflare'
  --exclude='wrangler.jsonc'

  # Version control
  --exclude='.git/'
  --exclude='.github/'

  # Dev tools and editor configs
  --exclude='.claude/'
  --exclude='.playwright-cli/'
  --exclude='.tmp/'
  --exclude='.wrangler/'
  --exclude='.vercel/'
  --exclude='.vscode/'
  --exclude='.idea/'
  --exclude='.githooks/'

  # OS artifacts
  --exclude='.DS_Store'
  --exclude='._*'
  --exclude='__MACOSX/'

  # Raw seed data (not needed in production)
  --exclude='src/seed/raw/'

  # TLS certificates (managed on server)
  --exclude='nginx/certs/*.pem'
  --exclude='nginx/certs/*.key'
)

# ── Minimal excludes for specific-path syncs ─────────────────────
#  When uploading a specific directory or file, only filter out
#  OS junk and dangerous directories. Project-level excludes like
#  *.md or docs/ do not apply.
MINIMAL_EXCLUDES=(
  --exclude='.DS_Store'
  --exclude='._*'
  --exclude='__MACOSX/'
  --exclude='*.log'
  --exclude='node_modules/'
  --exclude='.next/'
  --exclude='.next-dev/'
  --exclude='nginx/certs/*.pem'
  --exclude='nginx/certs/*.key'
)

# ── Build rsync flags ────────────────────────────────────────────
BASE_FLAGS=(-a -v -z)
if [[ $DRY_RUN -eq 1 ]]; then
  BASE_FLAGS+=(--dry-run)
fi

# ── Summary header ───────────────────────────────────────────────
print_header() {
  local scope="$1"
  echo "=============================================="
  echo "  Eversolo Web — rsync Deploy"
  echo "=============================================="
  echo "  Target:    ${DEPLOY_TARGET}:${REMOTE_DIR}"
  echo "  SSH Port:  ${SSH_PORT}"
  echo "  Scope:     ${scope}"
  echo "  Mode:      $([[ $DRY_RUN -eq 1 ]] && echo 'DRY RUN' || echo 'LIVE')"
  echo "=============================================="
  echo ""
}

# ── Full deploy ──────────────────────────────────────────────────
full_deploy() {
  print_header "Full project"
  rsync "${BASE_FLAGS[@]}" --delete \
    -e "$SSH_CMD" \
    "${FULL_EXCLUDES[@]}" \
    ./ "${DEPLOY_TARGET}:${REMOTE_DIR}/"
}

# ── Sync a single directory ──────────────────────────────────────
sync_directory() {
  local dir="$1"
  # Ensure no leading ./
  dir="${dir#./}"
  # Ensure trailing slash for rsync "contents" semantics
  dir="${dir%/}/"

  if [[ ! -d "$dir" ]]; then
    echo "ERROR: Directory not found: $dir" >&2
    return 1
  fi

  echo "  → ${dir} → ${REMOTE_DIR}/${dir}"
  local flags=("${BASE_FLAGS[@]}")
  if [[ $FORCE_DELETE -eq 1 ]]; then
    flags+=(--delete)
  fi

  rsync "${flags[@]}" \
    -e "$SSH_CMD" \
    "${MINIMAL_EXCLUDES[@]}" \
    "./${dir}" "${DEPLOY_TARGET}:${REMOTE_DIR}/${dir}"
}

# ── Sync one or more files ───────────────────────────────────────
sync_files() {
  # Use --relative so rsync preserves the full directory structure
  # e.g. ./src/payload/globals/Homepage.ts → /remote/src/payload/globals/Homepage.ts
  local file_args=()
  for f in "$@"; do
    f="${f#./}"
    if [[ ! -f "$f" ]]; then
      echo "ERROR: File not found: $f" >&2
      return 1
    fi
    echo "  → ${f}"
    file_args+=("./${f}")
  done

  rsync "${BASE_FLAGS[@]}" --relative \
    -e "$SSH_CMD" \
    "${MINIMAL_EXCLUDES[@]}" \
    "${file_args[@]}" \
    "${DEPLOY_TARGET}:${REMOTE_DIR}/"
}

# ── Execute ─────────────────────────────────────────────────────
if [[ ${#PATHS[@]} -eq 0 ]]; then
  # ── Full deploy ────────────────────────────────────────────────
  full_deploy
else
  # ── Specific paths: separate directories from files ───────────
  DIRS=()
  FILES=()

  for p in "${PATHS[@]}"; do
    # Strip leading ./
    p="${p#./}"
    if [[ -d "$p" ]]; then
      DIRS+=("$p")
    elif [[ -f "$p" ]]; then
      FILES+=("$p")
    else
      echo "ERROR: Path does not exist: $p" >&2
      exit 1
    fi
  done

  print_header "Specific paths (${#PATHS[@]} item(s))"

  # Sync directories
  if [[ ${#DIRS[@]} -gt 0 ]]; then
    for d in "${DIRS[@]}"; do
      sync_directory "$d" || exit 1
    done
  fi

  # Sync files (batch with --relative)
  if [[ ${#FILES[@]} -gt 0 ]]; then
    sync_files "${FILES[@]}" || exit 1
  fi
fi

# ── Post-deploy instructions ────────────────────────────────────
echo ""
if [[ $DRY_RUN -eq 1 ]]; then
  echo "✓ Dry run complete — no files were transferred."
  echo "  Run without --dry-run to apply changes."
else
  echo "✓ Upload complete."
  if [[ ${#PATHS[@]} -eq 0 ]]; then
    echo ""
    echo "Next steps (run on the production server):"
    echo ""
    echo "  1. Run database migrations:"
    echo "     cd ${REMOTE_DIR}"
    echo "     docker compose run --rm --no-deps bootstrap bash -lc 'npm ci --include=dev && npm run payload:migrate && npm run payload:migrate:status'"
    echo ""
    echo "  2. Rebuild and restart the app:"
    echo "     docker compose build app"
    echo "     docker compose up -d app"
  fi
fi