import {z} from 'zod'

export type QuestionAnswer = {questionIndex?: number | undefined, selectedOptions: Array<string>};

export type QuestionAnswerDecision = {type: string, answers: Array<QuestionAnswer>, id: string};

export type ToolApprovalDecision = {type: string, approved: boolean, id: string, scope?: ('ONCE' | 'CONVERSATION' | null) | undefined};

export type TaskDecisionsRequest = {decisions: Array<QuestionAnswerDecision | ToolApprovalDecision>};

export type CreateApiV1AiAgentsTasksTaskIdDecisionsArgs = {taskId: string, body: TaskDecisionsRequest};

export type CreateApiV1AiAgentsTasksTaskIdDecisionsOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const permissionMessage = z.object({body: z.string().optional(), title: z.string().optional()});

export const jsonNode = z.unknown();

export const pendingPermission = z.object({permissionMessage: permissionMessage.optional(), toolId: z.string().optional(), toolInput: jsonNode.optional(), toolName: z.string().optional(), type: z.enum(["tool", "question"]).optional()});

export const processApprovalsResponse = z.object({pendingDecisions: z.array(pendingPermission).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
};

/**
 * Submit Task Decisions
 * 
 * POST /v1/ai/agents/tasks/{taskId}/decisions
 */
export const createApiV1AiAgentsTasksTaskIdDecisions = async (args: CreateApiV1AiAgentsTasksTaskIdDecisionsArgs, options?: CreateApiV1AiAgentsTasksTaskIdDecisionsOptions) => {
const {baseUrl = "https://eu1.api.matillion.com/dpc", 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/ai/agents/tasks/${encodeURIComponent(String(args.taskId))}/decisions${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(processApprovalsResponse, await res.json())
};