import {z} from 'zod'

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

export const getApiSegmentsResponse = z.object({data: z.array(z.object({id: z.string(), name: z.string(), match: z.string(), conditions: z.array(z.object({field: z.string(), op: z.string(), value: z.unknown()})), count: z.number().int(), createdAt: z.string(), updatedAt: z.string()})), count: z.number().int(), fields: z.object({tag: z.array(z.string()), list: z.array(z.string()), status: z.array(z.string()), source: z.array(z.string()), email: z.array(z.string()), name: z.array(z.string()), signed_up: z.array(z.string()), opened: z.array(z.string()), clicked: z.array(z.string()), opens: z.array(z.string()), sends_without_open: z.array(z.string()), country: z.array(z.string()), field: z.array(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
};

/**
 * List saved segments with live counts
 * 
 * GET /segments
 */
export const getApiSegments = async (options?: GetApiSegmentsOptions) => {
const {baseUrl = "https://sendhq.cc/api/v1", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

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

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

const res = await fetchFn(url, {method: "GET", headers})

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

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