#!/bin/bash
# Methods library for odoo — sourced by install-odoo.sh and generated run-*.sh scripts.
# SCRIPT_DIR must be set by the caller before sourcing.

_kubectl() {
  if command -v kubectl >/dev/null 2>&1; then
    command kubectl "$@"
  elif command -v k0s >/dev/null 2>&1; then
    k0s kubectl "$@"
  else
    echo "ERROR: no kubectl or k0s binary found" >&2; exit 127
  fi
}

_require_env() {
  local var="$1"
  if [ -z "${!var:-}" ]; then
    echo "ERROR: required variable $var is not set" >&2; exit 1
  fi
}

_pod_name() {
  _kubectl get pod \
    --namespace "$ODOO_NAMESPACE" \
    --selector "app.kubernetes.io/name=odoo,app.kubernetes.io/instance=${ODOO_TENANT}" \
    -o jsonpath='{.items[0].metadata.name}' 2>/dev/null
}

_wait_for_pod() {
  local timeout="${1:-300}"
  _kubectl wait pod \
    --namespace "$ODOO_NAMESPACE" \
    --selector "app.kubernetes.io/name=odoo,app.kubernetes.io/instance=${ODOO_TENANT}" \
    --for=condition=Ready \
    --timeout="${timeout}s"
}

# ── Manifest plan helpers ─────────────────────────────────────────────────────

_plan_apply() {
  local file="$1"
  local path="$SCRIPT_DIR/manifests/${file}.yaml"
  [ -f "$path" ] || { echo "  [skip] ${file}.yaml not in manifests/"; return 0; }
  _kubectl apply -f "$path"
}

_plan_apply_skip() {
  local file="$1"
  local path="$SCRIPT_DIR/manifests/${file}.yaml"
  [ -f "$path" ] || { echo "  [skip] ${file}.yaml not in manifests/"; return 0; }
  if _kubectl get -f "$path" >/dev/null 2>&1; then
    echo "  [skip] ${file} already exists in cluster"
    return 0
  fi
  _kubectl apply -f "$path"
}

_plan_rollout_restart() {
  local file="$1"
  local path="$SCRIPT_DIR/manifests/${file}.yaml"
  [ -f "$path" ] || { echo "  [skip] ${file}.yaml not in manifests/"; return 0; }
  _kubectl rollout restart -f "$path"
}

_plan_delete() {
  local file="$1"
  local path="$SCRIPT_DIR/manifests/${file}.yaml"
  [ -f "$path" ] || { echo "  [skip] ${file}.yaml not in manifests/"; return 0; }
  _kubectl delete -f "$path" --ignore-not-found
}

# shellcheck source=lib/gateway-tls.sh
source "${SCRIPT_DIR}/lib/gateway-tls.sh"

# ── Component methods ─────────────────────────────────────────────────────────

_pg_namespace() {
  # postgresql.core-data.svc.cluster.local → core-data
  awk -F'.' '{print $2}' <<< "${ODOO_DB_HOST:-postgresql.core-data.svc.cluster.local}"
}

_pg_pod() {
  local ns
  ns=$(_pg_namespace)
  _kubectl get pod --namespace "$ns" \
    --selector "app.kubernetes.io/name=postgresql" \
    -o jsonpath='{.items[0].metadata.name}' 2>/dev/null
}

_method_create-credentials() {
  [ -f "${SCRIPT_DIR}/_credentials.env" ] && set -a && source "${SCRIPT_DIR}/_credentials.env" && set +a
  _require_env ODOO_DB_PASSWORD
  _require_env ODOO_ADMIN_PASSWORD
  _kubectl create secret generic odoo-credentials \
    --namespace "$ODOO_NAMESPACE" \
    --from-literal=ODOO_DB_PASSWORD="$ODOO_DB_PASSWORD" \
    --from-literal=PASSWORD="$ODOO_DB_PASSWORD" \
    --from-literal=ODOO_ADMIN_PASSWORD="$ODOO_ADMIN_PASSWORD" \
    --from-literal=ADMIN_PASSWD="$ODOO_ADMIN_PASSWORD" \
    --dry-run=client -o yaml | _kubectl apply -f -
}

_method_init-db() {
  [ -f "${SCRIPT_DIR}/_credentials.env" ] && set -a && source "${SCRIPT_DIR}/_credentials.env" && set +a
  _require_env ODOO_DB_PASSWORD
  _require_env ODOO_DB_NAME

  local pg_ns pg_pod db_user safe_pw safe_usr safe_db
  pg_ns=$(_pg_namespace)
  pg_pod=$(_pg_pod)
  [ -z "$pg_pod" ] && { echo "  [error] no postgresql pod found in namespace $pg_ns" >&2; exit 1; }

  db_user="${ODOO_DB_USER:-odoo}"
  # single-quote escape for embedding in PL/pgSQL string literal
  safe_pw="${ODOO_DB_PASSWORD//\'/\'\'}"
  safe_usr="${db_user//\'/\'\'}"
  safe_db="${ODOO_DB_NAME//\'/\'\'}"

  # Role: can use DO block (DDL inside function is fine for ROLE, not DATABASE)
  _kubectl exec -i --namespace "$pg_ns" "$pg_pod" -- psql -U postgres <<SQL
DO \$\$
DECLARE
  pw  text := '${safe_pw}';
  usr text := '${safe_usr}';
BEGIN
  IF NOT EXISTS (SELECT FROM pg_roles WHERE rolname = usr) THEN
    EXECUTE format('CREATE ROLE %I WITH LOGIN PASSWORD %L', usr, pw);
    RAISE NOTICE 'role % created', usr;
  ELSE
    EXECUTE format('ALTER ROLE %I WITH PASSWORD %L', usr, pw);
    RAISE NOTICE 'role % password updated', usr;
  END IF;
END;
\$\$;
SQL

  # CREATE DATABASE cannot run inside a function — check and create outside any transaction.
  local db_exists
  db_exists=$(_kubectl exec --namespace "$pg_ns" "$pg_pod" -- \
    psql -U postgres -tAc "SELECT 1 FROM pg_database WHERE datname = '${safe_db}'" 2>/dev/null)
  if [ "${db_exists:-}" = "1" ]; then
    echo "  [skip] database '${safe_db}' already exists (migration restore expected)"
  else
    _kubectl exec --namespace "$pg_ns" "$pg_pod" -- \
      psql -U postgres -c \
        "CREATE DATABASE \"${safe_db}\" WITH OWNER \"${safe_usr}\" ENCODING 'UTF8' LC_COLLATE 'C' TEMPLATE template0"
    echo "  [ok] database '${safe_db}' created"
  fi
  echo "  [ok] role '${db_user}' and database '${ODOO_DB_NAME}' ready in $pg_ns"
}

_method_wait-ready() {
  _wait_for_pod 300
}

_method_post-install() {
  echo "  [odoo] tenant ${ODOO_TENANT:-unknown} deployed in namespace ${ODOO_NAMESPACE}"
}

_method_dns-check() {
  local domain="${ODOO_DOMAIN:-}"
  local expected_ip="${ODOO_GATEWAY_IP:-}"
  if [ -z "$domain" ]; then
    echo "  [skip] ODOO_DOMAIN not set — skipping DNS check"
    return 0
  fi
  local resolved
  resolved=$(dig +short "$domain" A 2>/dev/null | head -1)
  if [ -z "$resolved" ]; then
    echo "  [warn] DNS: $domain does not resolve yet — expected $expected_ip"
    return 0
  fi
  if [ -n "$expected_ip" ] && [ "$resolved" != "$expected_ip" ]; then
    echo "  [warn] DNS: $domain → $resolved (expected $expected_ip)"
  else
    echo "  [ok] DNS: $domain → $resolved"
  fi
}


_method_protect-volume() {
  local pvc="${PLAN_PARAM_PVC:-odoo-filestore}"
  echo "  waiting for PVC '$pvc' to bind..."
  _kubectl wait pvc "$pvc" \
    --namespace "$ODOO_NAMESPACE" \
    --for=jsonpath='{.status.phase}'=Bound \
    --timeout=120s
  local pv_name
  pv_name=$(_kubectl get pvc "$pvc" \
    --namespace "$ODOO_NAMESPACE" \
    -o jsonpath='{.spec.volumeName}')
  if [ -z "$pv_name" ]; then
    echo "  [warn] could not resolve PV name for PVC '$pvc' — skipping volume protection"
    return 0
  fi
  echo "  enabling delete-protection on volume '$pv_name'..."
  if command -v hcloud >/dev/null 2>&1; then
    hcloud volume enable-protection "$pv_name" delete 2>/dev/null \
      && echo "  [ok] volume '$pv_name' protected" \
      || echo "  [warn] hcloud protect failed — enable manually: hcloud volume enable-protection $pv_name delete"
  else
    echo "  [warn] hcloud CLI not found — skip volume protection for '$pv_name'"
  fi
}