import {z} from 'zod'

export type RegenerateAISuggestion = {suggestedMessageId: string, feedback: string};

export type CreateApiCommsChatRegenerateSuggestionArgs = {TENANT: string, 'API-KEY': string, body: RegenerateAISuggestion};

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

export const suggestedMessageSummary = z.object({id: z.string(), chatId: z.string(), fromMessageId: z.string(), content: z.string(), assistantId: z.string(), isSelected: z.boolean(), createdDate: z.string()});

export const toolCallSummary = z.object({id: z.string(), callId: z.string().nullable().optional(), messageId: z.string().nullable().optional(), alertId: z.string().nullable().optional(), toolName: z.string(), toolArguments: z.object({}), toolCallId: z.string().nullable().optional(), result: z.object({}).nullable().optional(), toolCallDescription: z.string().nullable().optional(), hasBeenCalled: z.boolean().optional(), createdDate: z.string()});

export const createApiCommsChatRegenerateSuggestionResponse = z.union([suggestedMessageSummary, toolCallSummary]);

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
};

/**
 * Regenerate Ai Text
 * 
 * POST /comms/chat/regenerate-suggestion
 */
export const createApiCommsChatRegenerateSuggestion = async (args: CreateApiCommsChatRegenerateSuggestionArgs, options: CreateApiCommsChatRegenerateSuggestionOptions) => {
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.TENANT != null) headers.set("TENANT", String(args.TENANT))
if (args['API-KEY'] != null) headers.set("API-KEY", String(args['API-KEY']))

const url = `${baseUrl.replace(/\/+$/, '')}/comms/chat/regenerate-suggestion${query.size > 0 ? `?${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(createApiCommsChatRegenerateSuggestionResponse, await res.json())
};