import {z} from 'zod'

export type GetApiV1BillingUsageRequestsByModelArgs = {start_date?: (string | null) | undefined, end_date?: (string | null) | undefined, full_history?: boolean | undefined};

export type GetApiV1BillingUsageRequestsByModelOptions = {baseUrl: string, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const usageRequestModelSummaryItem = z.object({model: z.string(), request_count: z.number().int(), total_credits: z.number().optional(), total_tokens: z.number().int().optional(), total_input_tokens: z.number().int().optional(), total_output_tokens: z.number().int().optional(), total_cache_read_tokens: z.number().int().optional(), total_cache_write_tokens: z.number().int().optional(), total_cost: z.number().optional(), last_request_at: z.string()});

export const usageRequestModelSummaryResponse = z.object({items: z.array(usageRequestModelSummaryItem)});

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 Billing Usage Requests By Model
 * 
 * GET /v1/billing/usage/requests-by-model
 * 
 * Also accepts auth: BearerAuth
 */
export const getApiV1BillingUsageRequestsByModel = async (args: GetApiV1BillingUsageRequestsByModelArgs, options: GetApiV1BillingUsageRequestsByModelOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.start_date != null) query.append("start_date", String(args.start_date))
if (args.end_date != null) query.append("end_date", String(args.end_date))
if (args.full_history != null) query.append("full_history", String(args.full_history))
if (ApiKeyAuth !== undefined) headers.set("X-API-Key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/billing/usage/requests-by-model${query.size > 0 ? `?${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(usageRequestModelSummaryResponse, await res.json())
};