import {z} from 'zod'

export type CreateDebugChatBody = {clientEnv: string, asrLangCode?: string | undefined, ttsLangCode?: string | undefined, conversationId?: string | undefined, variantId?: string | undefined, channel?: string | undefined, integrationAttributes?: Record<string, never> | undefined};

export type CreateApiV1AgentsAgentIdDebugChatArgs = {body: CreateDebugChatBody};

export type CreateApiV1AgentsAgentIdDebugChatOptions = {baseUrl?: string | undefined, polyApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const chatMetadataResponse = z.object({state: z.object({}), currentNode: z.string(), nodeTrace: z.array(z.string()), metrics: z.object({}), functionEvents: z.array(z.unknown()), handoffDestination: z.string().optional(), retrievedTopics: z.array(z.string()).optional(), retrievedSources: z.array(z.string()).optional(), citedTopic: z.string().optional(), inFlow: z.string().optional(), inStep: z.string().optional(), llmRequests: z.array(z.object({})).optional(), asrLangCode: z.string().optional(), ttsLangCode: z.string().optional()});

export const debugChatResponse = z.object({conversationId: z.string(), userInput: z.string(), response: z.string(), metadata: chatMetadataResponse, conversationEnded: z.boolean(), delayedResponse: z.boolean()});

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
};

/**
 * Create a new debug chat session
 * 
 * POST /v1/agents/{agentId}/debug-chat
 */
export const createApiV1AgentsAgentIdDebugChat = async (args: CreateApiV1AgentsAgentIdDebugChatArgs, options?: CreateApiV1AgentsAgentIdDebugChatOptions) => {
const {baseUrl = "https://api.us.poly.ai", fetch: fetchFn = fetch, polyApiKey} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (polyApiKey !== undefined) headers.set("X-API-KEY", polyApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/agents/${encodeURIComponent(String(args.agentId))}/debug-chat${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(debugChatResponse, await res.json())
};