import {z} from 'zod'

export type GetApiIntegratorUsageSummaryArgs = {workspace_id: string, period: string};

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

export const operationSummary = z.object({prompt_tokens: z.number().int().optional(), completion_tokens: z.number().int().optional(), cached_prompt_tokens: z.number().int().optional(), cache_write_tokens: z.number().int().optional(), events: z.number().int().optional()});

export const sourceSummary = z.object({prompt_tokens: z.number().int().optional(), completion_tokens: z.number().int().optional(), cached_prompt_tokens: z.number().int().optional(), cache_write_tokens: z.number().int().optional(), events: z.number().int().optional()});

export const usageSummaryResponse = z.object({workspace_id: z.string(), period: z.string(), total_prompt_tokens: z.number().int().optional(), total_completion_tokens: z.number().int().optional(), total_cached_prompt_tokens: z.number().int().optional(), total_cache_write_tokens: z.number().int().optional(), total_events: z.number().int().optional(), by_operation: z.record(z.string(), operationSummary).optional(), by_source: z.record(z.string(), sourceSummary).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 workspace usage summary
 * 
 * GET /integrator/usage/summary
 */
export const getApiIntegratorUsageSummary = async (args: GetApiIntegratorUsageSummaryArgs, options: GetApiIntegratorUsageSummaryOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.workspace_id != null) query.append("workspace_id", String(args.workspace_id))
if (args.period != null) query.append("period", String(args.period))

const url = `${baseUrl.replace(/\/+$/, '')}/integrator/usage/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(usageSummaryResponse, await res.json())
};