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

# Phase 2B pre-migration backup
# pg_dump data tables (Account, Group, Message, Approval, SyncRoute, ConsentRecord)
# to ./backups/phase2b-pre-<timestamp>.sql
# Tenant, Admin, AuditEvent are NOT dumped (preserved by migration).

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ROOT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
BACKUP_DIR="$ROOT_DIR/backups"
TIMESTAMP="$(date -u +%Y%m%dT%H%M%SZ)"
OUT_FILE="$BACKUP_DIR/phase2b-pre-$TIMESTAMP.sql"

mkdir -p "$BACKUP_DIR"

if [ -z "${DATABASE_URL:-}" ]; then
  if [ -f "$ROOT_DIR/.env" ]; then
    set -a
    # shellcheck disable=SC1091
    . "$ROOT_DIR/.env"
    set +a
  fi
fi

if [ -z "${DATABASE_URL:-}" ]; then
  echo "ERROR: DATABASE_URL is not set and no .env file was found" >&2
  exit 1
fi

TABLES=(
  "Account"
  "Group"
  "Message"
  "Approval"
  "SyncRoute"
  "ConsentRecord"
)

ARGS=()
for t in "${TABLES[@]}"; do
  # pg_dump -t needs extra quoting to preserve PascalCase identifiers
  ARGS+=("-t" "\"$t\"")
done

echo "Dumping data-only backup of ${TABLES[*]} to $OUT_FILE"
pg_dump "$DATABASE_URL" \
  --data-only \
  --no-owner \
  --no-privileges \
  --inserts \
  "${ARGS[@]}" \
  -f "$OUT_FILE"

echo "Done. Size: $(wc -c < "$OUT_FILE") bytes"
echo "To restore (NOT recommended after Phase 2B has run):"
echo "  psql \"\$DATABASE_URL\" -f $OUT_FILE"