import {z} from 'zod'

export type PromptPreviewRequest = {operation?: ('retain' | 'consolidation' | 'reflect') | undefined, strategy?: (string | null) | undefined};

export type CreateApiV1DefaultBanksBankIdPromptsPreviewArgs = {bank_id: string, authorization?: (string | null) | undefined, body: PromptPreviewRequest};

export type CreateApiV1DefaultBanksBankIdPromptsPreviewOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const promptBlockModel = z.object({text: z.string(), source: z.enum(["config", "builtin"]), field: z.string().optional(), section: z.string().optional(), heading: z.string().optional(), active: z.boolean().optional(), value: z.string().nullable().optional(), kind: z.enum(["text", "boolean", "choice", "complex"]), choices: z.array(z.string()).nullable().optional(), editable: z.boolean().optional()});

export const promptMessageModel = z.object({role: z.enum(["system", "user"]), blocks: z.array(promptBlockModel).optional()});

export const runSettingModel = z.object({field: z.string(), value: z.string().nullable().optional(), kind: z.enum(["text", "boolean", "choice", "complex"]), editable: z.boolean().optional()});

export const promptPreviewResponse = z.object({messages: z.array(promptMessageModel).optional(), strategy: z.string().nullable().optional(), strategies: z.array(z.string()).optional(), run_settings: z.array(runSettingModel).optional(), response_schema: z.record(z.string(), z.unknown()).nullable().optional(), skipped_reason: 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
};

/**
 * Preview an operation's prompts (no LLM call)
 * 
 * POST /v1/default/banks/{bank_id}/prompts/preview
 */
export const createApiV1DefaultBanksBankIdPromptsPreview = async (args: CreateApiV1DefaultBanksBankIdPromptsPreviewArgs, options: CreateApiV1DefaultBanksBankIdPromptsPreviewOptions) => {
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")

if (args.authorization != null) headers.set("authorization", String(args.authorization))

const url = `${baseUrl.replace(/\/+$/, '')}/v1/default/banks/${encodeURIComponent(String(args.bank_id))}/prompts/preview${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(promptPreviewResponse, await res.json())
};