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

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

if [[ -f "${ENV_FILE}" ]]; then
  # shellcheck disable=SC1090
  source "${ENV_FILE}"
fi

ARTIFACT=""
WP_ROOT="${REMOTE_WP_PATH:-/var/www/wordpress}"

while [[ $# -gt 0 ]]; do
  case "$1" in
    --artifact)
      ARTIFACT="${2:-}"
      shift 2
      ;;
    --wp-root)
      WP_ROOT="${2:-}"
      shift 2
      ;;
    --help|-h)
      cat <<'USAGE'
Deploy a plugin artifact to remote WordPress.

Usage:
  scripts/deploy_remote.sh [--artifact /abs/or/relative/path.zip] [--wp-root /var/www/wordpress]

Defaults:
- Artifact: latest ./package/calendar-plugin-*.zip
- Remote host settings from credentials/.env

This script enforces ownership:
- chown -R www-data:www-data <remote plugin dir>
USAGE
      exit 0
      ;;
    *)
      echo "[deploy] unknown argument: $1" >&2
      exit 2
      ;;
  esac
done

if [[ -z "${ARTIFACT}" ]]; then
  ARTIFACT="$(ls -1 "${ROOT_DIR}/package/calendar-plugin-"*.zip 2>/dev/null | sort -V | tail -n1 || true)"
fi

if [[ -z "${ARTIFACT}" ]]; then
  echo "[deploy] no artifact found; run scripts/package_plugin.sh first" >&2
  exit 1
fi

if [[ "${ARTIFACT}" != /* ]]; then
  ARTIFACT="${ROOT_DIR}/${ARTIFACT#./}"
fi

if [[ ! -f "${ARTIFACT}" ]]; then
  echo "[deploy] artifact not found: ${ARTIFACT}" >&2
  exit 1
fi

MANIFEST="${ARTIFACT%.zip}.manifest.sha256"
if [[ ! -f "${MANIFEST}" ]]; then
  echo "[deploy] warning: manifest not found beside artifact (${MANIFEST}); continuing" >&2
fi

required=(REMOTE_HOST REMOTE_PORT REMOTE_USER REMOTE_SSH_KEY_PATH REMOTE_APP_DIR REMOTE_WP_CLI WP_URL)
for key in "${required[@]}"; do
  if [[ -z "${!key:-}" ]]; then
    echo "[deploy] missing required env var: ${key}" >&2
    exit 1
  fi
done

SSH_KEY_PATH="${REMOTE_SSH_KEY_PATH}"
if [[ "${SSH_KEY_PATH}" != /* ]]; then
  SSH_KEY_PATH="${ROOT_DIR}/${SSH_KEY_PATH}"
fi

if [[ ! -f "${SSH_KEY_PATH}" ]]; then
  echo "[deploy] ssh key not found: ${SSH_KEY_PATH}" >&2
  exit 1
fi

artifact_base="$(basename -- "${ARTIFACT}")"
stage_name="${artifact_base%.zip}"
STAGE_DIR="/tmp/${stage_name}"

SSH=(ssh -F /dev/null -i "${SSH_KEY_PATH}" -p "${REMOTE_PORT}" -o StrictHostKeyChecking=accept-new "${REMOTE_USER}@${REMOTE_HOST}")
RSYNC=(rsync -avz --delete -e "ssh -F /dev/null -i ${SSH_KEY_PATH} -p ${REMOTE_PORT} -o StrictHostKeyChecking=accept-new")

echo "[deploy] staging on remote: ${STAGE_DIR}"
"${SSH[@]}" "mkdir -p '${STAGE_DIR}'"

if [[ -f "${MANIFEST}" ]]; then
  "${RSYNC[@]}" "${ARTIFACT}" "${MANIFEST}" "${REMOTE_USER}@${REMOTE_HOST}:${STAGE_DIR}/"
else
  "${RSYNC[@]}" "${ARTIFACT}" "${REMOTE_USER}@${REMOTE_HOST}:${STAGE_DIR}/"
fi

"${SSH[@]}" "set -euo pipefail; rm -rf '${STAGE_DIR}/extracted'; mkdir -p '${STAGE_DIR}/extracted'; unzip -q '${STAGE_DIR}/${artifact_base}' -d '${STAGE_DIR}/extracted'; test -f '${STAGE_DIR}/extracted/calendar-plugin/calendar-plugin.php'"
"${SSH[@]}" "set -euo pipefail; rsync -a --delete '${STAGE_DIR}/extracted/calendar-plugin/' '${REMOTE_APP_DIR}/'"
"${SSH[@]}" "set -euo pipefail; chown -R www-data:www-data '${REMOTE_APP_DIR}'"
"${SSH[@]}" "set -euo pipefail; '${REMOTE_WP_CLI}' --path='${WP_ROOT}' plugin activate calendar-plugin --allow-root >/dev/null 2>&1 || true"

# Exact-match style checksum dry-run check
"${SSH[@]}" "set -euo pipefail; rsync -avznc --delete '${STAGE_DIR}/extracted/calendar-plugin/' '${REMOTE_APP_DIR}/' >/tmp/codex_rsync_check.out; if grep -Eq '^[^./]|^\./' /tmp/codex_rsync_check.out; then cat /tmp/codex_rsync_check.out; exit 1; fi"

# Ownership sanity check: must be zero mismatches
non_owned="$("${SSH[@]}" "set -euo pipefail; find '${REMOTE_APP_DIR}' \( ! -user www-data -o ! -group www-data \) | wc -l")"
if [[ "${non_owned}" != "0" ]]; then
  echo "[deploy] ownership check failed: ${non_owned} path(s) not owned by www-data:www-data" >&2
  exit 1
fi

# Resolve slug for endpoint checks
url_slug="$("${SSH[@]}" "'${REMOTE_WP_CLI}' --path='${WP_ROOT}' option get calendar_plugin_url_slug --allow-root 2>/dev/null || true" | tr -d '\r' | tail -n1)"
if [[ -n "${url_slug}" ]]; then
  ICS_URL="${WP_URL%/}/${url_slug}/calendar.ics"
  CALDAV_URL="${WP_URL%/}/${url_slug}/caldav/"
else
  ICS_URL="${WP_URL%/}/calendar.ics"
  CALDAV_URL="${WP_URL%/}/caldav/"
fi

health_code="$(curl -sS -o /tmp/codex_health.out -w '%{http_code}' "${WP_URL%/}/wp-json/calendar/v1/health" || true)"
ics_code="$(curl -sS -o /tmp/codex_ics.out -w '%{http_code}' "${ICS_URL}" || true)"
caldav_code="$(curl -sS -o /tmp/codex_caldav.out -w '%{http_code}' "${CALDAV_URL}" || true)"

echo "[deploy] plugin deployed: ${artifact_base}"
echo "[deploy] ownership: www-data:www-data (verified)"
echo "[deploy] checks: health=${health_code} ics=${ics_code} caldav_unauth=${caldav_code}"
echo "[deploy] urls: ${ICS_URL} ${CALDAV_URL}"