import {z} from 'zod'

export type WebSearchTool = {type: 'web_search'};

export type ExpressAgentRunsRequest = {agent: 'express', input: string, stream?: boolean | undefined, tools?: Array<WebSearchTool> | undefined};

export type ComputeTool = {type: 'compute'};

export type SearchEffort = 'auto' | 'low' | 'medium' | 'high';

export type ReportVerbosity = 'medium' | 'high';

export type ResearchTool = {type: 'research', search_effort: SearchEffort, report_verbosity: ReportVerbosity};

export type Verbosity = 'medium' | 'high';

export type AdvancedAgentRunsRequest = {agent: 'advanced', input: string, stream?: boolean | undefined, tools?: (Array<ComputeTool | ResearchTool>) | undefined, verbosity?: Verbosity | undefined, workflow_config?: {max_workflow_steps: number} | undefined};

export type CustomAgentRunsRequest = {agent: string, input: string, stream?: boolean | undefined};

export type CreateApiV1AgentsRunsArgs = {body: ExpressAgentRunsRequest | AdvancedAgentRunsRequest | CustomAgentRunsRequest};

export type CreateApiV1AgentsRunsOptions = {baseUrl?: string | undefined, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const agentRunsResponseWebSearchResult = z.object({source_type: z.literal("web_search"), citation_uri: z.string(), provider: z.string().optional(), title: z.string(), snippet: z.string(), thumbnail_url: z.string().optional(), url: z.string()});

export const agentRunsResponseOutput = z.object({text: z.string().optional(), type: z.enum(["message.answer", "web_search.results"]), content: z.array(agentRunsResponseWebSearchResult).optional()});

export const agentRunsBatchResponse = z.object({agent: z.string(), mode: z.string().optional(), input: z.array(z.object({role: z.literal("user"), content: z.string()})), output: z.array(agentRunsResponseOutput)});

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
};

/**
 * Run an Agent
 * 
 * POST /v1/agents/runs
 */
export const createApiV1AgentsRuns = async (args: CreateApiV1AgentsRunsArgs, options?: CreateApiV1AgentsRunsOptions) => {
const {baseUrl = "https://api.you.com", fetch: fetchFn = fetch, ApiKeyAuth} = 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("X-API-Key", ApiKeyAuth)

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