import {z} from 'zod'

export type GetApiV1FineTunedModelsArgs = {cursor?: (string | null) | undefined, limit?: number | undefined};

export type GetApiV1FineTunedModelsOptions = {baseUrl: string, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const variantTraffic = z.object({state: z.enum(["receiving", "inactive", "unknown"]), attempts: z.number().int(), successes: z.number().int(), failures: z.number().int(), last_seen_at: z.string().nullable().optional()});

export const inventoryVariant = z.object({kind: z.enum(["lora", "full", "base"]), variant_id: z.string(), training_job_id: z.string().nullable().optional(), display_name: z.string().nullable().optional(), version_number: z.string().nullable().optional(), root_job_id: z.string().nullable().optional(), model_kind: z.enum(["lora", "full"]).nullable().optional(), artifact_status: z.enum(["ready", "not_ready"]), is_deployable: z.boolean(), deployability_reason: z.string().nullable().optional(), is_current_model: z.boolean(), created_at: z.string().nullable().optional(), completed_at: z.string().nullable().optional(), traffic: variantTraffic.nullable().optional()});

export const inventoryBaseModelGroup = z.object({base_model: z.string(), variants: z.array(inventoryVariant)});

export const inventoryProject = z.object({project_id: z.string(), name: z.string(), visibility: z.enum(["private", "team"]), current_model_id: z.string().nullable().optional(), base_models: z.array(inventoryBaseModelGroup), variants_truncated: z.boolean().optional()});

export const fineTunedInventoryResponse = z.object({projects: z.array(inventoryProject), traffic_window_seconds: z.number().int(), traffic_status: z.enum(["available", "unavailable"]), next_cursor: z.string().nullable().optional(), has_more: z.boolean()});

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 Fine Tuned Inventory
 * 
 * GET /v1/fine-tuned-models
 * 
 * Also accepts auth: BearerAuth
 */
export const getApiV1FineTunedModels = async (args: GetApiV1FineTunedModelsArgs, options: GetApiV1FineTunedModelsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.limit != null) query.append("limit", String(args.limit))
if (ApiKeyAuth !== undefined) headers.set("X-API-Key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/fine-tuned-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(fineTunedInventoryResponse, await res.json())
};