import {z} from 'zod'

export type CreateApiSegmentsPreviewArgs = {body: {name?: string | undefined, match?: ('all' | 'any') | undefined, conditions?: (Array<{field: string, key?: string | undefined, op: string, value?: (string | number | null) | undefined}>) | undefined}};

export type CreateApiSegmentsPreviewOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiSegmentsPreviewResponse = z.object({count: z.number().int(), sample: z.array(z.object({id: z.string(), email: z.string(), name: z.string(), fields: z.object({plan: z.string()}), status: z.string(), consent: z.object({source: z.string(), basis: z.string(), importId: z.unknown(), optedInAt: z.string(), confirmedAt: z.unknown(), ip: z.unknown(), userAgent: z.unknown()}), unsubscribedAt: z.unknown(), dormant: z.boolean(), dormantAt: z.unknown(), engagement: z.object({sent: z.number().int(), opens: z.number().int(), clicks: z.number().int(), lastSentAt: z.string(), lastOpenedAt: z.string(), lastClickedAt: z.string(), sendsSinceEngaged: z.number().int()}), country: z.string(), tags: z.array(z.string()), lists: z.array(z.string()), createdAt: z.string(), updatedAt: z.string()}))});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Count and sample the contacts that match unsaved conditions
 * 
 * POST /segments/preview
 */
export const createApiSegmentsPreview = async (args: CreateApiSegmentsPreviewArgs, options?: CreateApiSegmentsPreviewOptions) => {
const {baseUrl = "https://sendhq.cc/api/v1", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/segments/preview${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiSegmentsPreviewResponse, await res.json())
};