import {z} from 'zod'

export type GetApiUsageInferencesArgs = {created_after: string, created_before: string, limit?: number | undefined, offset?: number | undefined, endpoint?: (Array<'detect' | 'locate' | 'element_locate' | 'agent_chat'> | null) | undefined, model?: string | undefined, search?: string | undefined, session_id?: string | undefined, order_by?: string | undefined};

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

export const usageInference = z.object({api_key_id: z.string().optional(), cost_microdollars: z.number().int(), created_at: z.string(), endpoint: z.enum(["detect", "locate", "element_locate", "agent_chat"]), inference_id: z.string(), latency_ms: z.number().int(), model: z.string(), ocr_engine: z.enum(["free", "premium"]).optional(), ocr_pages: z.number().int(), session_id: z.string().optional(), vlm_model: z.string().optional()});

export const usageInferencesResponse = z.object({inferences: z.array(usageInference).nullable(), limit: z.number().int(), offset: z.number().int(), total: z.number().int()});

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
};

/**
 * List inference calls
 * 
 * GET /usage/inferences
 */
export const getApiUsageInferences = async (args: GetApiUsageInferencesArgs, options?: GetApiUsageInferencesOptions) => {
const {baseUrl = "https://api.axilio.ai/api/v1", fetch: fetchFn = fetch, apiKeyAuth} = options ?? {}

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

if (args.created_after != null) query.append("created_after", String(args.created_after))
if (args.created_before != null) query.append("created_before", String(args.created_before))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.offset != null) query.append("offset", String(args.offset))
if (args.endpoint != null) query.append("endpoint", args.endpoint.join(','))
if (args.model != null) query.append("model", String(args.model))
if (args.search != null) query.append("search", String(args.search))
if (args.session_id != null) query.append("session_id", String(args.session_id))
if (args.order_by != null) query.append("order_by", String(args.order_by))
if (apiKeyAuth !== undefined) headers.set("X-Axilio-Api-Key", apiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/usage/inferences${query.size > 0 ? `?${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(usageInferencesResponse, await res.json())
};