import {z} from 'zod'

export type GetApiV1InsightIncomeRevenueArgs = {'X-Trace-Id'?: string | undefined, start: string, end: string, 'accounts[]'?: Array<number> | undefined};

export type GetApiV1InsightIncomeRevenueOptions = {baseUrl?: string | undefined, fireflyIiiAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const insightGroupEntry = z.object({id: z.string().optional(), name: z.string().optional(), difference: z.string().optional(), difference_float: z.number().optional(), currency_id: z.string().optional(), currency_code: z.string().optional()});

export const insightGroup = z.array(insightGroupEntry);

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
};

/**
 * Insight into income, grouped by revenue account.
 * 
 * GET /v1/insight/income/revenue
 * 
 * Also accepts auth: local_bearer_auth
 */
export const getApiV1InsightIncomeRevenue = async (args: GetApiV1InsightIncomeRevenueArgs, options?: GetApiV1InsightIncomeRevenueOptions) => {
const {baseUrl = "https://demo.firefly-iii.org/api", fetch: fetchFn = fetch, fireflyIiiAuth} = options ?? {}

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

if (args['X-Trace-Id'] != null) headers.set("X-Trace-Id", String(args['X-Trace-Id']))
if (args.start != null) query.append("start", String(args.start))
if (args.end != null) query.append("end", String(args.end))
for (const item of args['accounts[]'] ?? []) query.append("accounts[]", String(item))
if (fireflyIiiAuth !== undefined) headers.set('authorization', `Bearer ${fireflyIiiAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/insight/income/revenue${query.size > 0 ? `?${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(insightGroup, await res.json())
};