import {z} from 'zod'

export type GetApiV1ResponsesArgs = {limit?: number | undefined, after?: (string | null) | undefined, before?: (string | null) | undefined};

export type GetApiV1ResponsesOptions = {baseUrl: string, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const messageContent = z.object({type: z.string(), text: z.string().nullable().optional()});

export const message = z.object({id: z.string(), type: z.string().optional(), role: z.string(), content: z.array(messageContent), status: z.string()});

export const toolCall = z.object({id: z.string(), type: z.string(), call_id: z.string().nullable().optional(), name: z.string().nullable().optional(), arguments: z.string().nullable().optional(), status: z.string().nullable().optional(), function: z.record(z.string(), z.unknown()).nullable().optional(), mcp: z.record(z.string(), z.unknown()).nullable().optional()});

export const toolOutput = z.object({type: z.string().optional(), tool_call_id: z.string(), output: z.string()});

export const response = z.object({id: z.string().nullable().optional(), object: z.string().optional(), created_at: z.number().int(), status: z.string(), model: z.string(), output: z.array(z.union([message, toolCall, toolOutput])), previous_response_id: z.string().nullable().optional(), usage: z.record(z.string(), z.unknown()).nullable().optional(), error: z.record(z.string(), z.unknown()).nullable().optional(), incomplete_details: z.record(z.string(), z.unknown()).nullable().optional(), instructions: z.string().nullable().optional(), max_output_tokens: z.number().int().nullable().optional(), max_tool_calls: z.number().int().gte(1).nullable().optional(), parallel_tool_calls: z.boolean().optional(), reasoning: z.record(z.string(), z.unknown()).nullable().optional(), store: z.boolean().nullable().optional(), temperature: z.number().gte(0).lte(2).optional(), text: z.record(z.string(), z.unknown()).nullable().optional(), tool_choice: z.union([z.string(), z.record(z.string(), z.unknown())]).optional(), tools: z.array(z.record(z.string(), z.unknown())).optional(), top_p: z.number().gte(0).lte(1).optional(), truncation: z.string().optional(), user: z.string().nullable().optional(), metadata: z.record(z.string(), z.unknown()).nullable().optional()});

export const responseList = z.object({object: z.string().optional(), data: z.array(response), has_more: z.boolean(), first_id: z.string().nullable().optional(), last_id: z.string().nullable().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
};

/**
 * List Responses
 * 
 * GET /v1/responses
 */
export const getApiV1Responses = async (args: GetApiV1ResponsesArgs, options: GetApiV1ResponsesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (args.after != null) query.append("after", String(args.after))
if (args.before != null) query.append("before", String(args.before))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

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