import {z} from 'zod'

export type ContentPart = {type: 'input_text' | 'output_text' | 'input_image' | 'input_video', text?: string | undefined, image_url?: (string | {url: string, detail?: ('low' | 'default' | 'high') | undefined}) | undefined, video_url?: (string | {url: string, fps?: number | undefined, detail?: ('low' | 'default' | 'high') | undefined, max_long_side_pixel?: number | undefined}) | undefined};

export type InputItem = {type?: ('message' | 'function_call' | 'function_call_output' | 'reasoning') | undefined, role?: ('user' | 'assistant' | 'system' | 'developer' | 'tool') | undefined, content?: (string | Array<ContentPart>) | undefined, call_id?: string | undefined, name?: string | undefined, arguments?: string | undefined, output?: (string | Array<ContentPart>) | undefined, summary?: (Array<{type?: 'summary_text' | undefined, text?: string | undefined}>) | undefined};

export type Tool = {type: 'function', name: string, description?: string | undefined, parameters?: Record<string, never> | undefined};

export type EstimateInputTokensReq = {model: string, input: string | Array<InputItem>, instructions?: string | undefined, tools?: Array<Tool> | undefined, tool_choice?: 'auto' | undefined, text?: ({format?: ({type?: 'text' | undefined}) | undefined}) | undefined, reasoning?: ({effort?: ('minimal' | 'low' | 'medium' | 'high' | 'xhigh' | 'max' | 'none') | undefined}) | undefined};

export type CreateApiV1ResponsesInputTokensArgs = {'Content-Type': 'application/json', body: EstimateInputTokensReq};

export type CreateApiV1ResponsesInputTokensOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const estimateInputTokensResp = z.object({object: z.literal("response.input_tokens"), input_tokens: z.number().int()});

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
};

/**
 * Estimate Input Tokens
 * 
 * POST /v1/responses/input_tokens
 */
export const createApiV1ResponsesInputTokens = async (args: CreateApiV1ResponsesInputTokensArgs, options?: CreateApiV1ResponsesInputTokensOptions) => {
const {baseUrl = "https://api.minimax.io", 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 (args['Content-Type'] != null) headers.set("Content-Type", String(args['Content-Type']))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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