import {z} from 'zod'

export type Message = {role: 'system' | 'user' | 'assistant', content: string | Array<{type: 'text' | 'image' | 'audio' | 'video', text?: string | undefined, url?: string | undefined, base64?: string | undefined}>};

export type MessagesProperty = Array<Message>;

export type StreamProperty = boolean;

export type JsonProperty = boolean;

export type ParamsProperty = {min_length?: number | undefined, max_length?: number | undefined, temperature?: number | undefined};

export type UniversalRequestBodySchema = {text?: string | undefined, messages?: MessagesProperty | undefined, url?: string | undefined, base64?: string | undefined, question?: string | undefined, context?: string | undefined, candidate_labels?: Array<string> | undefined, stream?: StreamProperty | undefined, json?: JsonProperty | undefined, params?: ParamsProperty | undefined};

export type CreateApiModelsV2CohereModelArgs = {model: string, body: UniversalRequestBodySchema};

export type CreateApiModelsV2CohereModelOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, providerKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiModelsV2CohereModelResponse = z.object({error: z.string().optional(), output: z.union([z.string(), z.object({})]).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
};

/**
 * Cohere
 * 
 * POST /models/v2/cohere/{model}
 */
export const createApiModelsV2CohereModel = async (args: CreateApiModelsV2CohereModelArgs, options?: CreateApiModelsV2CohereModelOptions) => {
const {baseUrl = "https://api.bytez.com", fetch: fetchFn = fetch, apiKeyAuth, providerKeyAuth} = options ?? {}

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

if (apiKeyAuth !== undefined) headers.set("Authorization", apiKeyAuth)
if (providerKeyAuth !== undefined) headers.set("provider-key", providerKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/models/v2/cohere/${encodeURIComponent(String(args.model))}${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(createApiModelsV2CohereModelResponse, await res.json())
};