import {z} from 'zod'

export type EmailSubscriptionChannelRequest = {type: 'EMAIL'};

export type ExtoleClientSlackSubscriptionChannelRequest = {type: 'EXTOLE_CLIENT_SLACK'};

export type SlackSubscriptionChannelRequest = {type: 'SLACK', webhook_url: string};

export type ThirdPartyEmailSubscriptionChannelRequest = {type: 'THIRD_PARTY_EMAIL', recipient: string};

export type WebhookSubscriptionChannelRequest = {type: 'WEBHOOK', webhook_id: string};

export type SubscriptionChannelRequest = EmailSubscriptionChannelRequest | ExtoleClientSlackSubscriptionChannelRequest | SlackSubscriptionChannelRequest | ThirdPartyEmailSubscriptionChannelRequest | WebhookSubscriptionChannelRequest;

export type FilterExpressionInUserSubscriptionRequest = boolean | string | string;

export type UserSubscriptionRequest = {channels?: Array<SubscriptionChannelRequest> | undefined, dedupe_duration_ms?: number | undefined, filter_expression?: FilterExpressionInUserSubscriptionRequest | undefined, filtering_level: 'ALL' | 'NONE' | 'NOTEWORTHY' | 'SOME', having_all_tags: Array<string>};

export type CreateApiV6UsersUserIdSubscriptionsArgs = {user_id: string, body: UserSubscriptionRequest};

export type CreateApiV6UsersUserIdSubscriptionsOptions = {baseUrl?: string | undefined, HEADER?: string | undefined, fetch?: typeof fetch | undefined};

export const emailSubscriptionChannelResponse = z.object({id: z.string(), type: z.literal("EMAIL")});

export const extoleClientSlackSubscriptionChannelResponse = z.object({id: z.string(), type: z.literal("EXTOLE_CLIENT_SLACK")});

export const slackSubscriptionChannelResponse = z.object({id: z.string(), type: z.literal("SLACK"), webhook_url: z.string()});

export const thirdPartyEmailSubscriptionChannelResponse = z.object({id: z.string(), type: z.literal("THIRD_PARTY_EMAIL"), recipient: z.string()});

export const webhookSubscriptionChannelResponse = z.object({id: z.string(), type: z.literal("WEBHOOK"), webhook_id: z.string()});

export const subscriptionChannelResponse = z.discriminatedUnion("type", [emailSubscriptionChannelResponse, extoleClientSlackSubscriptionChannelResponse, slackSubscriptionChannelResponse, thirdPartyEmailSubscriptionChannelResponse, webhookSubscriptionChannelResponse]);

export const filterExpressionInUserSubscriptionResponse = z.union([z.boolean(), z.string(), z.string()]);

export const userSubscriptionResponse = z.object({channels: z.array(subscriptionChannelResponse), dedupe_duration_ms: z.number().int(), filter_expression: filterExpressionInUserSubscriptionResponse, filtering_level: z.enum(["ALL", "NONE", "NOTEWORTHY", "SOME"]), having_all_tags: z.array(z.string()), subscription_id: 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
};

/**
 * Create a user subscription
 * 
 * POST /v6/users/{user_id}/subscriptions
 * 
 * Also accepts auth: QUERY, COOKIE
 */
export const createApiV6UsersUserIdSubscriptions = async (args: CreateApiV6UsersUserIdSubscriptionsArgs, options?: CreateApiV6UsersUserIdSubscriptionsOptions) => {
const {baseUrl = "https://api.extole.io", fetch: fetchFn = fetch, HEADER} = options ?? {}

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

if (HEADER !== undefined) headers.set("Authorization", HEADER)

const url = `${baseUrl.replace(/\/+$/, '')}/v6/users/${encodeURIComponent(String(args.user_id))}/subscriptions${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(userSubscriptionResponse, await res.json())
};