import {z} from 'zod'

export type GetApiApiV1DashboardSummaryArgs = {period?: ('30d' | '60d' | 'all') | undefined};

export type GetApiApiV1DashboardSummaryOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const dashboardSummaryResponse = z.object({success: z.boolean(), data: z.object({scope: z.union([z.literal("global"), z.literal("partner"), z.literal("merchant")]), period: z.union([z.literal("30d"), z.literal("60d"), z.literal("all")]), period_days: z.number().int().nullable(), comparison_period: z.object({start: z.string(), end: z.string()}).optional(), partners: z.object({total: z.number().int(), new_in_period: z.number().int().optional()}).optional(), merchants: z.object({total: z.number().int(), new_in_period: z.number().int().optional()}).optional(), transactions: z.object({count: z.number().int(), previous_count: z.number().int().optional()}), volume_by_currency: z.array(z.object({currency: z.string().min(3).max(3), amount: z.string(), previous_amount: z.string().optional()})), fees_by_currency: z.array(z.object({currency: z.string().min(3).max(3), amount: z.string(), previous_amount: z.string().optional()})), next_payout_by_currency: z.array(z.object({currency: z.string().min(3).max(3), amount: 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
};

/**
 * Get dashboard summary with scope-aware KPI metrics
 * 
 * GET /api/v1/dashboard/summary
 */
export const getApiApiV1DashboardSummary = async (args: GetApiApiV1DashboardSummaryArgs, options?: GetApiApiV1DashboardSummaryOptions) => {
const {baseUrl = "https://core.quidkey.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.period != null) query.append("period", String(args.period))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/dashboard/summary${query.size > 0 ? `?${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(dashboardSummaryResponse, await res.json())
};