import {z} from 'zod'

export type ToolCall = {function?: ({name: string, description?: string | undefined, arguments?: Record<string, never> | undefined}) | undefined};

export type ChatMessage = {role: 'system' | 'user' | 'assistant' | 'tool', content: string, images?: Array<string> | undefined, tool_calls?: Array<ToolCall> | undefined};

export type CreateRequest = {model: string, from?: string | undefined, template?: string | undefined, renderer?: string | undefined, parser?: string | undefined, license?: (string | Array<string>) | undefined, system?: string | undefined, parameters?: Record<string, never> | undefined, messages?: Array<ChatMessage> | undefined, quantize?: string | undefined, stream?: boolean | undefined};

export type CreateApiApiCreateArgs = {body: CreateRequest};

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

export const statusResponse = z.object({status: z.string().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 model
 * 
 * POST /api/create
 */
export const createApiApiCreate = async (args: CreateApiApiCreateArgs, options?: CreateApiApiCreateOptions) => {
const {baseUrl = "http://localhost:11434", fetch: fetchFn = fetch} = options ?? {}

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

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