import {z} from 'zod'

export type GetApiV1BillingLedgerBreakdownArgs = {start: string, end: string, dimension?: (Array<'category' | 'model' | 'provider' | 'project' | 'experiment'> | null) | undefined, grain?: ('day' | 'month' | null) | undefined, project_id?: (string | null) | undefined, experiment_id?: (string | null) | undefined};

export type GetApiV1BillingLedgerBreakdownOptions = {baseUrl: string, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const ledgerBreakdownRow = z.object({category: z.string().nullable().optional(), model: z.string().nullable().optional(), provider: z.string().nullable().optional(), project_id: z.string().nullable().optional(), experiment_id: z.string().nullable().optional(), period_start: z.string().nullable().optional(), spend: z.string(), entries: z.number().int()});

export const ledgerBreakdownResponse = z.object({rows: z.array(ledgerBreakdownRow)});

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 Ledger Breakdown
 * 
 * GET /v1/billing/ledger/breakdown
 * 
 * Also accepts auth: BearerAuth
 */
export const getApiV1BillingLedgerBreakdown = async (args: GetApiV1BillingLedgerBreakdownArgs, options: GetApiV1BillingLedgerBreakdownOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

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.dimension ?? []) query.append("dimension", String(item))
if (args.grain != null) query.append("grain", String(args.grain))
if (args.project_id != null) query.append("project_id", String(args.project_id))
if (args.experiment_id != null) query.append("experiment_id", String(args.experiment_id))
if (ApiKeyAuth !== undefined) headers.set("X-API-Key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/billing/ledger/breakdown${query.size > 0 ? `?${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(ledgerBreakdownResponse, await res.json())
};