import {z} from 'zod'

export type SummaryEnumProcessingState = 'complete' | 'partial';

export type GetApiV1VoiceCallSidSummaryArgs = {CallSid: string, ProcessingState?: SummaryEnumProcessingState | undefined};

export type GetApiV1VoiceCallSidSummaryOptions = {baseUrl?: string | undefined, accountSidAuthToken?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const summaryEnumCallType = z.enum(["carrier", "sip", "trunking", "client", "whatsapp"]);

export const summaryEnumCallState = z.enum(["ringing", "completed", "busy", "fail", "noanswer", "canceled", "answered", "undialed"]);

export const summaryEnumAnsweredBy = z.enum(["unknown", "machine_start", "machine_end_beep", "machine_end_silence", "machine_end_other", "human", "fax"]);

export const summaryEnumProcessingState = z.enum(["complete", "partial"]);

export const callSummaryCrelayRateStats = z.object({min: z.number().optional(), max: z.number().optional(), avg: z.number().optional()});

export const callSummaryCrelayTokenStats = z.object({total: z.number().int().optional(), tokens_per_second: callSummaryCrelayRateStats.optional()});

export const callSummaryCrelayWordStats = z.object({total: z.number().int().optional(), words_per_minute: callSummaryCrelayRateStats.optional()});

export const callSummaryCrelayInterruptions = z.object({customer_to_agent: z.number().int().optional(), agent_to_customer: z.number().int().optional()});

export const callSummaryCrelaySessionState = z.enum(["unknown", "failure", "ended", "hung_up"]);

export const callSummaryAgentSessionSummary = z.object({session_id: z.string().optional(), tts_latency_ms: callSummaryCrelayRateStats.optional(), stt_latency_ms: callSummaryCrelayRateStats.optional(), network_latency_ms: callSummaryCrelayRateStats.optional(), time_to_first_audio_ms: callSummaryCrelayRateStats.optional(), application_latency_ms: callSummaryCrelayRateStats.optional(), tokens: callSummaryCrelayTokenStats.optional(), words: callSummaryCrelayWordStats.optional(), turns: z.number().int().optional(), interruptions: callSummaryCrelayInterruptions.optional(), session_state: callSummaryCrelaySessionState.optional()});

export const insightsV1CallSummary = z.object({account_sid: z.string().min(34).max(34).nullable().optional(), call_sid: z.string().min(34).max(34).nullable().optional(), call_type: summaryEnumCallType.optional(), call_state: summaryEnumCallState.optional(), answered_by: summaryEnumAnsweredBy.optional(), processing_state: summaryEnumProcessingState.optional(), created_time: z.string().nullable().optional(), start_time: z.string().nullable().optional(), end_time: z.string().nullable().optional(), duration: z.number().int().nullable().optional(), connect_duration: z.number().int().nullable().optional(), from: z.unknown(), to: z.unknown(), carrier_edge: z.unknown(), client_edge: z.unknown(), sdk_edge: z.unknown(), sip_edge: z.unknown(), tags: z.array(z.string()).nullable().optional(), url: z.string().nullable().optional(), attributes: z.unknown(), properties: z.unknown(), trust: z.unknown(), annotation: z.unknown(), agent_session_summaries: z.array(callSummaryAgentSessionSummary).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
};

/**
 * Get a specific Call Summary.
 * 
 * GET /v1/Voice/{CallSid}/Summary
 */
export const getApiV1VoiceCallSidSummary = async (args: GetApiV1VoiceCallSidSummaryArgs, options?: GetApiV1VoiceCallSidSummaryOptions) => {
const {baseUrl = "https://insights.twilio.com", fetch: fetchFn = fetch, accountSidAuthToken} = options ?? {}

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

if (args.ProcessingState != null) query.append("ProcessingState", String(args.ProcessingState))
if (accountSidAuthToken !== undefined) headers.set('authorization', `Basic ${btoa(`${accountSidAuthToken.username}:${accountSidAuthToken.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/Voice/${encodeURIComponent(String(args.CallSid))}/Summary${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(insightsV1CallSummary, await res.json())
};