#!/usr/bin/env sh
# Apply SQL migrations to PostgreSQL (Docker Compose service "postgres" by default).
#
# By default skips 000001_* (bootstrap + seeds): Docker initdb runs it on first volume
# create; re-applying breaks on duplicate INSERTs. Set MIGRATE_INCLUDE_BOOTSTRAP=1 to
# include it (empty DB, no initdb hook).
#
# Usage:
#   ./scripts/migrate.sh
#   DB_USER=myuser DB_NAME=mydb ./scripts/migrate.sh
#   MIGRATE_INCLUDE_BOOTSTRAP=1 ./scripts/migrate.sh

set -eu

ROOT_DIR="$(CDPATH= cd -- "$(dirname "$0")/.." && pwd)"
MIGRATIONS_DIR="${ROOT_DIR}/backend/migrations"

DB_USER="${DB_USER:-autohero}"
DB_NAME="${DB_NAME:-autohero}"
COMPOSE_FILE="${COMPOSE_FILE:-${ROOT_DIR}/docker-compose.yml}"

cd "${ROOT_DIR}"

if ! docker compose -f "${COMPOSE_FILE}" exec -T postgres pg_isready -U "${DB_USER}" -d "${DB_NAME}" >/dev/null 2>&1; then
  echo "migrate.sh: postgres is not ready or container is not running. Start: docker compose up -d postgres" >&2
  exit 1
fi

apply_file() {
  f="$1"
  name="$(basename "$f")"
  echo "Applying ${name}..."
  docker compose -f "${COMPOSE_FILE}" exec -T postgres \
    psql -v ON_ERROR_STOP=1 -U "${DB_USER}" -d "${DB_NAME}" < "$f"
}

# Sorted list (000001, 000002, ...); skip 000001 unless MIGRATE_INCLUDE_BOOTSTRAP=1
found=0
for f in $(find "${MIGRATIONS_DIR}" -maxdepth 1 -name '*.sql' | sort); do
  found=1
  base="$(basename "$f")"
  case "${base}" in
    000001_*.sql)
      if [ "${MIGRATE_INCLUDE_BOOTSTRAP:-0}" != "1" ]; then
        echo "Skipping ${base} (set MIGRATE_INCLUDE_BOOTSTRAP=1 to apply bootstrap on an empty DB)"
        continue
      fi
      ;;
  esac
  apply_file "$f"
done

if [ "${found}" -eq 0 ]; then
  echo "migrate.sh: no .sql files in ${MIGRATIONS_DIR}" >&2
  exit 1
fi

echo "Done."