const typeMap: Record<string, any> = {
  number: { type: 'integer', format: 'int64' },
  string: { type: 'string' },
  Date: { type: 'string', format: 'date-time' },
  boolean: { type: 'boolean' },
}
export async function modelToSchema(model: any) {
  const properties: Record<string, any> = {}
  for (const [key, meta] of model.$columnsDefinitions.entries()) {
    const tsType = meta.meta?.designType?.name || 'string'
    const mapped = typeMap[tsType] ?? { type: 'string' }
    properties[meta?.serializeAs || key] = {
      ...mapped,
      description: key.replace(/([A-Z])/g, ' $1').trim(),
    }
  }
  return JSON.stringify(properties)
}