import {z} from 'zod'

export type ToolCall = {id?: string | undefined, name: string, arguments: unknown};

export type ActionEnvelope = {id: string, session_id?: string | undefined, harness?: string | undefined, provider?: string | undefined, model?: string | undefined, kind: 'unknown' | 'log' | 'test_build_lint' | 'search' | 'file_list' | 'document_read' | 'agent_handoff' | 'query' | 'verbatim', tool: ToolCall, result: string, task?: string | undefined, intent?: string | undefined, retrieval_handle?: string | undefined, client_version?: string | undefined};

export type CreateApiV1ActionsReduceArgs = {body: ActionEnvelope};

export type CreateApiV1ActionsReduceOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const selector = z.object({id: z.string().min(1).max(128), label: z.string().max(512).optional(), type: z.enum(["lines", "json_path", "group"]), start: z.number().int().gte(0).optional(), end: z.number().int().gte(0).optional(), json_path: z.string().max(1024).optional(), group: z.string().max(256).optional()});

export const actionUsage = z.object({bytes_in: z.number().int().gte(0).lte(9223372036854776000), bytes_out: z.number().int().gte(0).lte(9223372036854776000), reducer_input_tokens: z.number().int().gte(0).lte(9223372036854776000).optional(), reducer_output_tokens: z.number().int().gte(0).lte(9223372036854776000).optional(), reducer_cost_microusd: z.number().int().gte(0).lte(9223372036854776000).optional(), elapsed_ms: z.number().int().gte(0).lte(9223372036854776000).optional()});

export const actionResponse = z.object({action_id: z.string(), kind: z.enum(["unknown", "log", "test_build_lint", "search", "file_list", "document_read", "agent_handoff", "query", "verbatim"]), decision: z.enum(["passthrough", "reduced"]), content: z.string().optional(), reason: z.string().optional(), selectors: z.array(selector).optional(), usage: actionUsage});

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
};

/**
 * Reduce Action
 * 
 * POST /v1/actions/reduce
 */
export const createApiV1ActionsReduce = async (args: CreateApiV1ActionsReduceArgs, options: CreateApiV1ActionsReduceOptions) => {
const {baseUrl, 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 = `${baseUrl.replace(/\/+$/, '')}/v1/actions/reduce${query.size > 0 ? `?${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(actionResponse, await res.json())
};