import {z} from 'zod'

export type Notes = {[key: string]: string};

export type PatchApiSubscriptionsIdArgs = {id: string, body: {plan_id?: string | undefined, quantity?: number | undefined, remaining_count?: number | undefined, schedule_change_at?: ('now' | 'cycle_end') | undefined, customer_notify?: (0 | 1) | undefined, notes?: Notes | undefined}};

export type PatchApiSubscriptionsIdOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const notes = z.record(z.string(), z.string());

export const subscription = z.object({id: z.string().optional(), entity: z.literal("subscription").optional(), plan_id: z.string().optional(), status: z.enum(["created", "authenticated", "active", "pending", "halted", "cancelled", "completed", "expired", "paused"]).optional(), current_start: z.number().int().optional(), current_end: z.number().int().optional(), ended_at: z.number().int().optional(), quantity: z.number().int().optional(), notes: notes.optional(), charge_at: z.number().int().optional(), start_at: z.number().int().optional(), end_at: z.number().int().optional(), auth_attempts: z.number().int().optional(), total_count: z.number().int().optional(), paid_count: z.number().int().optional(), remaining_count: z.number().int().optional(), customer_notify: z.union([z.literal(0), z.literal(1)]).optional(), short_url: z.string().optional(), has_scheduled_changes: z.boolean().optional(), change_scheduled_at: z.enum(["now", "cycle_end"]).optional(), source: z.string().optional(), offer_id: z.string().optional(), expire_by: z.number().int().optional(), created_at: 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
};

/**
 * Update a subscription
 * 
 * PATCH /subscriptions/{id}
 * 
 * Also accepts auth: oauth2
 */
export const patchApiSubscriptionsId = async (args: PatchApiSubscriptionsIdArgs, options?: PatchApiSubscriptionsIdOptions) => {
const {baseUrl = "https://api.razorpay.com/v1", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/subscriptions/${encodeURIComponent(String(args.id))}${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "PATCH", 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(subscription, await res.json())
};