import {z} from 'zod'

export type GetApiApiConnectionsArgs = {per_page?: number | undefined, page?: number | undefined};

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

export const countryId = z.enum(["DE", "AT", "CH"]);

export const syncMode = z.enum(["full", "shared", "none"]);

export const bankConnection = z.object({id: z.string().optional(), transaction: z.string().optional(), bic: z.string().optional(), bank_name: z.string().optional(), country_id: countryId.optional(), sync_mode: syncMode.optional(), sync_active: z.boolean().optional(), sync_message: z.string().optional(), sync_fail_counter: z.number().int().optional(), last_synced: z.string().optional(), consent_valid_until: z.string().optional(), testmode: z.boolean().optional(), created_at: z.string().optional(), object: z.string().optional()});

export const bankConnectionList = z.object({total: z.number().int().optional(), per_page: z.number().int().optional(), current_page: z.number().int().optional(), last_page: z.number().int().optional(), next_page_url: z.string().nullable().optional(), prev_page_url: z.string().nullable().optional(), from: z.number().int().optional(), to: z.number().int().optional(), data: z.array(bankConnection).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
};

/**
 * Get a list of all bank connections for a xs2a.api bank user
 * 
 * GET /api/connections
 */
export const getApiApiConnections = async (args: GetApiApiConnectionsArgs, options?: GetApiApiConnectionsOptions) => {
const {baseUrl = "https://api.xs2a.com/v1", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.per_page != null) query.append("per_page", String(args.per_page))
if (args.page != null) query.append("page", String(args.page))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/connections${query.size > 0 ? `?${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(bankConnectionList, await res.json())
};