import {z} from 'zod'

export type EdubankSubscriptionCharge = {start_date: string, frequency: 'DAILY' | 'MONTHLY', duration: number, amount: number};

export type EdubankSubscriptionReferences = {due_date: string, reference_id: string};

export type EdubankSubscriptionProposalDto = {description: string, reference_id: string, expires_in: string, charge: EdubankSubscriptionCharge, notification_url: string, references?: Array<EdubankSubscriptionReferences> | undefined};

export type CreateApiV1SubscriptionsProposalArgs = {body: EdubankSubscriptionProposalDto};

export type CreateApiV1SubscriptionsProposalOptions = {baseUrl: string, xApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const edubankSubscriptionCharge = z.object({start_date: z.string(), frequency: z.enum(["DAILY", "MONTHLY"]), duration: z.number(), amount: z.number()});

export const edubankSubscriptionPermission = z.object({authorized: z.boolean(), authorized_in: z.string(), card_id: z.string()});

export const edubankSubscriptionReferences = z.object({due_date: z.string(), reference_id: z.string()});

export const edubankSubscription = z.object({created_at: z.string().optional(), updated_at: z.string().optional(), seller_id: z.string(), subscription_id: z.string(), description: z.string(), reference_id: z.string(), buyer_id: z.string(), status: z.enum(["PROPOSAL", "ACTIVE", "EXPIRED", "CANCELED", "SUSPENDED", "REACTIVATED"]), expires_in: z.string(), charge: edubankSubscriptionCharge, notification_url: z.string(), subscription_permission: edubankSubscriptionPermission, references: z.array(edubankSubscriptionReferences).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
};

/**
 * Creates a subscription proposal that must be authorized by the buyer
 * 
 * POST /v1/subscriptions/proposal
 * 
 * Also accepts auth: authorization
 */
export const createApiV1SubscriptionsProposal = async (args: CreateApiV1SubscriptionsProposalArgs, options: CreateApiV1SubscriptionsProposalOptions) => {
const {baseUrl, fetch: fetchFn = fetch, xApiKey} = options ?? {}

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

if (xApiKey !== undefined) headers.set("x-api-key", xApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/subscriptions/proposal${query.size > 0 ? `?${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(edubankSubscription, await res.json())
};