import {z} from 'zod'

export type RunRequest = {agent_id: string, message: string | Record<string, never> | null, agent_history?: (Array<unknown> | null) | undefined, thread_id?: (string | null) | undefined, hitl_decision?: ('approve' | 'edit' | 'reject' | null) | undefined};

export type CreateApiV1AgentsRunArgs = {body: RunRequest};

export type CreateApiV1AgentsRunOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const responseMeta = z.object({request_id: z.string().nullable().optional()});

export const toolCall = z.object({name: z.string(), arguments: z.object({}).nullable().optional(), id: z.string().nullable().optional()});

export const agentExecutionDetails = z.object({reasoning: z.string().nullable().optional(), toolcalls: z.array(toolCall).optional(), toolresponse: z.array(z.unknown()).optional(), llmresponse: z.string().nullable().optional(), hitl: z.union([z.string(), z.object({})]).nullable().optional()});

export const creditUsage = z.object({agent_name: z.string(), number_of_runs: z.number().int(), credit_consumed: z.number()});

export const usageStats = z.object({credits_charged: z.array(creditUsage).optional(), total_credits_charged: z.number().optional()});

export const additionalMetadata = z.object({thread_id: z.string().nullable().optional()});

export const agentResponse = z.object({request_metadata: responseMeta.optional(), response: z.array(z.record(z.string(), agentExecutionDetails)), usage: usageStats, additional_metadata: additionalMetadata});

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 a deployed Agent
 * 
 * POST /v1/agents/run
 */
export const createApiV1AgentsRun = async (args: CreateApiV1AgentsRunArgs, options?: CreateApiV1AgentsRunOptions) => {
const {baseUrl = "https://api.svahnar.com", 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 (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

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