const typeMap: Record<string, { type: string; format?: string }> = {
  number: { type: 'integer', format: 'int64' },
  string: { type: 'string' },
  Date: { type: 'string', format: 'date-time' },
  boolean: { type: 'boolean' },
}

/** Legacy schema helper retained for callers that need a property map. */
export async function modelToSchema(model: any) {
  const properties: Record<string, unknown> = {}
  for (const [key, meta] of model.$columnsDefinitions.entries()) {
    const tsType = meta.meta?.designType?.name || 'string'
    properties[meta?.serializeAs || key] = {
      ...(typeMap[tsType] ?? { type: 'string' }),
      description: key.replace(/([A-Z])/g, ' $1').trim(),
    }
  }
  return JSON.stringify(properties)
}

/**
 * Produces a deterministic, concrete JSON object for AutoSwagger response
 * annotations. It intentionally omits Lucid columns hidden from serialization.
 */
export async function modelToExample(model: any) {
  const example: Record<string, string | number | boolean> = {}

  for (const [key, meta] of model.$columnsDefinitions.entries()) {
    if (meta.serializeAs === null) continue

    const serializedKey = meta.serializeAs || key
    const type = meta.meta?.designType?.name || 'string'
    example[serializedKey] = sampleValue(serializedKey, type)
  }

  return JSON.stringify(example)
}

function sampleValue(key: string, type: string): string | number | boolean {
  if (type === 'number') return key === 'id' || key.endsWith('_id') ? 42 : 100
  if (type === 'boolean') return true
  if (type === 'Date') return '2025-01-15T10:30:00.000Z'
  if (key.includes('email')) return 'user@example.test'
  if (key.includes('url')) return 'https://example.test/resource'
  return `Example ${key.replace(/_/g, ' ')}`
}