import {z} from 'zod'

export type GatewayLimit = {request: number, time: number};

export type GatewayMapping = {error?: string | undefined, gateway?: string | undefined, is_public?: boolean | undefined, limit?: GatewayLimit | undefined, method?: ('GET' | 'POST' | 'PUT' | 'DELETE' | 'PATCH' | 'OPTIONS' | 'HEAD') | undefined, path?: string | undefined, subject?: string | undefined, timeout?: number | undefined, traffic_distribution?: {[key: string]: number} | undefined};

export type GatewayTriggerRequest = {name: string, collection?: string | undefined, description?: string | undefined, trigger_type: 'gateway', gateway_mapping: GatewayMapping};

export type CreateApiTriggerGatewayArgs = {body: GatewayTriggerRequest};

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

export const gatewayTriggerResponse = z.object({body: z.object({name: z.string().optional(), collection: z.string().optional(), gateway_mapping_subject: z.string().optional(), stream: z.string().optional(), subject: z.string().optional(), trigger_type: z.literal("gateway").optional(), type: z.string().optional()}).optional(), status_code: z.number().int().optional()});

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
};

/**
 * Create a gateway trigger
 * 
 * POST /trigger/gateway
 * 
 * Also accepts auth: apiKeyAuth
 */
export const createApiTriggerGateway = async (args: CreateApiTriggerGatewayArgs, options?: CreateApiTriggerGatewayOptions) => {
const {baseUrl = "https://api.quiva.ai", 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 = `${baseUrl.replace(/\/+$/, '')}/trigger/gateway${query.size > 0 ? `?${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(gatewayTriggerResponse, await res.json())
};