import {z} from 'zod'

export type GetApiV1ModelsArgs = {ai_project_id?: (string | null) | undefined, verbose?: boolean | undefined};

export type GetApiV1ModelsOptions = {baseUrl?: string | undefined, HTTPBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const listObject = z.literal("list");

export const modelObject = z.literal("model");

export const modelStatus = z.enum(["validating", "active", "error", "deleted"]);

export const appModelsModelsModel = z.object({id: z.string(), created: z.number().int(), object: modelObject, owned_by: z.string(), status: modelStatus.nullable().optional()});

export const architecture = z.object({modality: z.string(), tokenizer: z.string(), instruct_type: z.string().nullable()});

export const quantizationType = z.enum(["int4", "int8", "fp4", "fp6", "fp8", "fp16", "bf16", "fp32"]);

export const pricing = z.object({prompt: z.string().optional(), completion: z.string().optional(), image: z.string().optional(), price_per_video_second: z.string().optional(), request: z.string().optional(), price_per_minute: z.string().optional()});

export const richModelRegion = z.object({country_code: z.string(), name: z.string()});

export const richModel = z.object({id: z.string(), name: z.string(), created: z.number().int(), description: z.string(), context_length: z.number().int(), architecture: architecture, quantization: quantizationType.nullable().optional(), pricing: pricing, per_request_limits: z.record(z.string(), z.number()).nullable().optional(), status: modelStatus.nullable().optional(), status_reason: z.string().nullable().optional(), object: z.string().optional(), owned_by: z.string().optional(), regions: z.array(richModelRegion).nullable().optional(), supported_features: z.array(z.string()).nullable().optional(), supported_sampling_parameters: z.array(z.string()).nullable().optional()});

export const listModelResponse = z.object({object: listObject, data: z.array(z.union([appModelsModelsModel, richModel]))});

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 models
 * 
 * GET /v1/models
 */
export const getApiV1Models = async (args: GetApiV1ModelsArgs, options?: GetApiV1ModelsOptions) => {
const {baseUrl = "https://api.tokenfactory.nebius.com", fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

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

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