import {z} from 'zod'

export type GetApiV1ModelApisModelApiNameOptions = {baseUrl: string, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const limitTypeV1 = z.enum(["REQUEST", "TOKEN"]);

export const rateLimitUnitV1 = z.enum(["SECOND", "MINUTE"]);

export const rateLimitV1 = z.object({type: limitTypeV1, unit: rateLimitUnitV1, threshold: z.number().int().gte(0)});

export const modelAPIOrgDetailsV1 = z.object({added_at: z.string(), last_used_at: z.string().nullable().optional()});

export const modelAPIV1 = z.object({name: z.string(), display_name: z.string(), description: z.string(), model_family: z.string().nullable().optional(), release_date: z.string(), invoke_url: z.string(), context_length: z.number().int(), cost_per_million_input_tokens: z.union([z.number(), z.string()]), cost_per_million_output_tokens: z.union([z.number(), z.string()]), rate_limits: z.array(rateLimitV1), org_details: modelAPIOrgDetailsV1.nullable().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
};

/**
 * Gets a Model API
 * 
 * GET /v1/model_apis/{model_api_name}
 */
export const getApiV1ModelApisModelApiName = async (options: GetApiV1ModelApisModelApiNameOptions) => {
const {baseUrl, fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/model_apis/${encodeURIComponent(String(args.model_api_name))}${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(modelAPIV1, await res.json())
};