import {z} from 'zod'

export type BatchCreateRequest = {model: string, input_file_id?: string | undefined, requests?: (Array<{custom_id: string, method?: string | undefined, url?: string | undefined, body?: Record<string, never> | undefined, params?: Record<string, never> | undefined}>) | undefined, endpoint?: ('/v1/chat/completions' | '/v1/embeddings' | '/v1/completions' | '/v1/responses' | '/v1/messages') | undefined, completion_window?: string | undefined, metadata?: {[key: string]: string} | undefined};

export type CreateApiV1BatchesArgs = {body: BatchCreateRequest};

export type CreateApiV1BatchesOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const modelProvider = z.enum(["openai", "azure", "anthropic", "bedrock", "cohere", "vertex", "vllm", "mistral", "ollama", "groq", "sgl", "parasail", "perplexity", "replicate", "cerebras", "deepseek", "gemini", "openrouter", "elevenlabs", "huggingface", "nebius", "xai", "runway", "fireworks"]);

export const bifrostCacheDebug = z.object({cache_hit: z.boolean().optional(), cache_id: z.string().optional(), hit_type: z.string().optional(), requested_provider: z.string().optional(), requested_model: z.string().optional(), provider_used: z.string().optional(), model_used: z.string().optional(), input_tokens: z.number().int().optional(), threshold: z.number().optional(), similarity: z.number().optional()});

export const bifrostResponseExtraFields = z.object({request_type: z.string().optional(), provider: modelProvider.optional(), model_requested: z.string().optional(), model_deployment: z.string().optional(), latency: z.number().int().optional(), chunk_index: z.number().int().optional(), raw_request: z.object({}).optional(), raw_response: z.object({}).optional(), cache_debug: bifrostCacheDebug.optional()});

export const batchCreateResponse = z.object({id: z.string().optional(), object: z.string().optional(), endpoint: z.string().optional(), input_file_id: z.string().optional(), completion_window: z.string().optional(), status: z.enum(["validating", "failed", "in_progress", "finalizing", "completed", "expired", "cancelling", "canceled", "ended"]).optional(), request_counts: z.object({total: z.number().int().optional(), completed: z.number().int().optional(), failed: z.number().int().optional(), succeeded: z.number().int().optional(), expired: z.number().int().optional(), canceled: z.number().int().optional(), pending: z.number().int().optional()}).optional(), metadata: z.record(z.string(), z.string()).optional(), created_at: z.number().int().optional(), expires_at: z.number().int().optional(), output_file_id: z.string().optional(), error_file_id: z.string().optional(), processing_status: z.string().optional(), results_url: z.string().optional(), operation_name: z.string().optional(), extra_fields: bifrostResponseExtraFields.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
};

/**
 * Create a batch job
 * 
 * POST /v1/batches
 * 
 * Also accepts auth: BasicAuth, VirtualKeyAuth, ApiKeyAuth
 */
export const createApiV1Batches = async (args: CreateApiV1BatchesArgs, options?: CreateApiV1BatchesOptions) => {
const {baseUrl = "http://localhost:8080", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/batches${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(batchCreateResponse, await res.json())
};