#!/usr/bin/env bash
# One-way sync: local workstation project tree → Dev VM (5700) /srv/projects
# for coordinated development over SSH (Cursor Remote-SSH, shared tree).
#
# Prerequisites:
#   - CT 5700 exists, ssh dev1@IP_DEV_VM works, /srv/projects is writable (see setup-dev-vm-users-and-gitea.sh).
#   - Run from a machine that has your local clone (default: ~/projects).
#
# Usage:
#   ./scripts/deployment/sync-local-projects-to-dev-vm.sh --dry-run
#   ./scripts/deployment/sync-local-projects-to-dev-vm.sh
#   ./scripts/deployment/sync-local-projects-to-dev-vm.sh --delete-remote   # mirror: remove remote files absent locally
#   RSYNC_RSH='ssh -o ProxyCommand="cloudflared access ssh --hostname ssh.dev.d-bis.org"' \
#     DEV_VM_HOST=ssh.dev.d-bis.org ./scripts/deployment/sync-local-projects-to-dev-vm.sh
#
# Env:
#   SOURCE           — local directory (default: ~/projects)
#   DEV_VM_USER      — SSH user on dev VM (default: dev1)
#   DEV_VM_HOST      — override IP/hostname (default: IP_DEV_VM from config)
#   DEV_VM_PROJECTS  — remote path (default: /srv/projects)
#   RSYNC_EXTRA_OPTS — extra rsync args (quoted string)
#   RSYNC_RSH        — passed to rsync as SSH transport (e.g. cloudflared ProxyCommand)
#
# If --delete-remote fails with rsync code 23 (Permission denied on delete), run:
#   ./scripts/deployment/fix-dev-vm-srv-projects-ownership.sh
# See: docs/04-configuration/DEV_VM_WORKSTATION_MIGRATION_RUNBOOK.md

set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
# shellcheck source=/dev/null
source "${PROJECT_ROOT}/scripts/lib/load-project-env.sh" 2>/dev/null || true
# shellcheck source=/dev/null
source "${PROJECT_ROOT}/config/ip-addresses.conf" 2>/dev/null || true

SOURCE="${SOURCE:-${HOME}/projects}"
DEV_VM_USER="${DEV_VM_USER:-dev1}"
DEV_VM_HOST="${DEV_VM_HOST:-${IP_DEV_VM:-192.168.11.59}}"
DEV_VM_PROJECTS="${DEV_VM_PROJECTS:-/srv/projects}"
RSYNC_EXTRA_OPTS="${RSYNC_EXTRA_OPTS:-}"

DRY_RUN=()
DELETE_REMOTE=0
while [[ $# -gt 0 ]]; do
  case "$1" in
    --dry-run) DRY_RUN=(-n); shift ;;
    --delete-remote) DELETE_REMOTE=1; shift ;;
    --help|-h)
      sed -n '1,35p' "$0" | tail -n +2
      exit 0
      ;;
    *)
      echo "ERROR: unknown argument: $1 (try --help)" >&2
      exit 1
      ;;
  esac
done

if [[ ! -d "$SOURCE" ]]; then
  echo "ERROR: SOURCE is not a directory: $SOURCE" >&2
  exit 1
fi

REMOTE="${DEV_VM_USER}@${DEV_VM_HOST}:${DEV_VM_PROJECTS}/"

RSYNC_DELETE=()
if [[ "$DELETE_REMOTE" == "1" ]]; then
  RSYNC_DELETE=(--delete-delay)
  echo "WARNING: --delete-remote — files on Dev VM under DEST not present locally (after excludes) will be REMOVED."
  echo ""
else
  echo "Safe mode: no remote delete (omit files only on VM). Use --delete-remote to mirror (destructive)."
  echo ""
fi

echo "=== Sync local projects → Dev VM ==="
echo "SOURCE:  $SOURCE"
echo "DEST:    $REMOTE"
echo "Mode:    ${DRY_RUN[*]:-live}"
if [[ -n "${RSYNC_RSH:-}" ]]; then
  echo "RSYNC_RSH: set (custom SSH / cloudflared)"
fi
echo ""
echo "NOTE: Review secrets after sync — chmod 600 remote .env; share only with trusted dev users."
echo ""

# Heavy / reproducible artifacts (keep .git; omit bulky caches)
RSYNC_EXCLUDES=(
  --exclude=node_modules
  --exclude=__pycache__
  --exclude=.pnpm-store
  --exclude=.pnpm
  --exclude=venv
  --exclude=.venv
  --exclude=.venv-*
  --exclude=dist
  --exclude=build
  --exclude=.next
  --exclude=out
  --exclude=.turbo
  --exclude=.cache
  --exclude=.parcel-cache
  --exclude=coverage
  --exclude=.pytest_cache
  --exclude=.mypy_cache
  --exclude=.ruff_cache
  --exclude=forge-cache
  --exclude=artifacts
  --exclude=broadcast
  --exclude=tmp
  --exclude=.tmp
  --exclude=.codex-artifacts
)

# Optional: skip known multi-GB trees (re-clone or sync later with --no-skip-large)
if [[ "${SKIP_LARGE_LOCAL_TREES:-1}" == "1" ]]; then
  RSYNC_EXCLUDES+=(
    --exclude=MEV_Bot
    --exclude=the-order
  )
  echo "SKIP_LARGE_LOCAL_TREES=1: excluding MEV_Bot, the-order (set SKIP_LARGE_LOCAL_TREES=0 to include)."
  echo ""
fi

if [[ -n "${RSYNC_RSH:-}" ]]; then
  export RSYNC_RSH
else
  unset RSYNC_RSH 2>/dev/null || true
fi

set -x
# shellcheck disable=SC2086
set +e
rsync -av "${DRY_RUN[@]}" "${RSYNC_DELETE[@]}" --omit-dir-times \
  "${RSYNC_EXCLUDES[@]}" \
  ${RSYNC_EXTRA_OPTS} \
  "${SOURCE}/" "${REMOTE}"
rsync_ec=$?
set -e
set +x

if [[ "$rsync_ec" -ne 0 ]]; then
  echo "" >&2
  echo "ERROR: rsync exited with code $rsync_ec." >&2
  if [[ "$rsync_ec" -eq 23 && "$DELETE_REMOTE" == "1" ]]; then
    echo "       Common cause: root-owned files on the VM block deletes. From repo root (Proxmox root SSH to the node that runs CT 5700):" >&2
    echo "         ./scripts/deployment/fix-dev-vm-srv-projects-ownership.sh" >&2
  fi
  exit "$rsync_ec"
fi

echo ""
echo "Done. Next: SSH to dev VM, open /srv/projects/proxmox in Cursor (Remote-SSH), run pnpm/npm install where needed."