import {z} from 'zod'

export type GetApiApiV1ProjectUsageArgs = {last_days?: number | undefined};

export type GetApiApiV1ProjectUsageOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const dailyUsage = z.object({date: z.string(), total_insert: z.number().int().optional(), total_success_insert: z.number().int().optional(), total_input_token: z.number().int().optional(), total_output_token: z.number().int().optional()});

export const cODE = z.union([z.literal(0), z.literal(400), z.literal(401), z.literal(403), z.literal(404), z.literal(405), z.literal(409), z.literal(422), z.literal(500), z.literal(501), z.literal(502), z.literal(503), z.literal(504), z.literal(520)]);

export const usageResponse = z.object({data: z.array(dailyUsage).nullable().optional(), errno: cODE.optional(), errmsg: z.string().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 Project Usage
 * 
 * GET /api/v1/project/usage
 */
export const getApiApiV1ProjectUsage = async (args: GetApiApiV1ProjectUsageArgs, options?: GetApiApiV1ProjectUsageOptions) => {
const {baseUrl = "https://api.memobase.dev", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

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

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