import {z} from 'zod'

export type GetApiV1ImportsFormatsTemplatesOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const layoutTemplateDiscriminatorResponse = z.object({length: z.number().int(), startByte: z.number().int()});

export const layoutTemplateFieldResponse = z.object({kind: z.string(), length: z.number().int(), name: z.string(), startByte: z.number().int()});

export const layoutTemplateRecordResponse = z.object({fields: z.array(layoutTemplateFieldResponse).nullable(), recordType: z.string(), width: z.number().int()});

export const layoutTemplateResponse = z.object({createdAt: z.string(), discriminator: layoutTemplateDiscriminatorResponse, formatKey: z.string(), id: z.string(), recordTypeCount: z.number().int(), recordWidths: z.record(z.string(), z.number().int()), records: z.array(layoutTemplateRecordResponse).nullable(), requiredFields: z.array(z.string()).nullable(), variantKey: z.string()});

export const listLayoutTemplatesResponse = z.object({items: z.array(layoutTemplateResponse).nullable()});

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 operator fixed-width layout templates
 * 
 * GET /v1/imports/formats/templates
 */
export const getApiV1ImportsFormatsTemplates = async (options?: GetApiV1ImportsFormatsTemplatesOptions) => {
const {baseUrl = "https://identity.sandbox.lerian.net", 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 = `${baseUrl.replace(/\/+$/, '')}/v1/imports/formats/templates${query.size > 0 ? `?${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(listLayoutTemplatesResponse, await res.json())
};