import type { VoipWebhookEvent } from '@mento/shared';

/** پیشوند ذخیره‌شده در recordingUrl برای واکشی بعدی با توکن API */
export const DAFTARESHOMA_RECORDING_PREFIX = 'daftareshoma-recording:';

export function daftareshomaRecordingRef(recordingId: string): string {
  return `${DAFTARESHOMA_RECORDING_PREFIX}${recordingId}`;
}

export function parseDaftaresomaRecordingRef(
  value: string | null | undefined,
): string | null {
  const raw = String(value ?? '').trim();
  if (!raw.startsWith(DAFTARESHOMA_RECORDING_PREFIX)) return null;
  const id = raw.slice(DAFTARESHOMA_RECORDING_PREFIX.length).trim();
  return id || null;
}

type Loose = Record<string, unknown>;

function str(v: unknown): string {
  return v == null ? '' : String(v).trim();
}

function pick(obj: Loose, ...keys: string[]): string {
  for (const k of keys) {
    const v = str(obj[k]);
    if (v) return v;
  }
  return '';
}

function parseDurationSec(raw: unknown): number | undefined {
  if (raw == null || raw === '') return undefined;
  if (typeof raw === 'number' && Number.isFinite(raw)) {
    return Math.max(0, Math.round(raw));
  }
  const s = String(raw).trim();
  if (!s) return undefined;
  if (/^\d+(\.\d+)?$/.test(s)) return Math.max(0, Math.round(Number(s)));
  const parts = s.split(':').map((p) => Number(p));
  if (parts.some((n) => !Number.isFinite(n))) return undefined;
  if (parts.length === 3) {
    return Math.max(0, Math.round(parts[0]! * 3600 + parts[1]! * 60 + parts[2]!));
  }
  if (parts.length === 2) {
    return Math.max(0, Math.round(parts[0]! * 60 + parts[1]!));
  }
  return undefined;
}

/**
 * رویداد وب‌هوک دفتر شما را به VoipWebhookEvent تبدیل می‌کند.
 * اگر payload از قبل فرمت Montact باشد، همان را برمی‌گرداند.
 */
export function mapDaftaresomaWebhook(
  body: unknown,
): VoipWebhookEvent | null {
  if (!body || typeof body !== 'object') return null;
  const obj = body as Loose;

  const legacyCallId = pick(obj, 'callId');
  if (legacyCallId && (obj.direction || obj.status || obj.from || obj.to)) {
    return body as VoipWebhookEvent;
  }

  const eventType = pick(obj, 'EventType', 'eventType', 'event');
  const callId = pick(obj, 'CallId', 'callId', 'Id', 'id');
  if (!callId) return null;

  const caller = pick(
    obj,
    'CallerNumber',
    'callerNumber',
    'from',
    'From',
    'fromNumber',
  );
  /** خط سازمانی که تماس روی آن آمده/رفته */
  const lineExtension =
    pick(obj, 'CalleeExtension', 'calleeExtension', 'Extension', 'extension') ||
    undefined;
  /** مقصد انتقال / شماره طرف مقابل روی خط */
  const transferred = pick(
    obj,
    'TransferredToNumber',
    'transferredToNumber',
  );

  const startedAt =
    pick(obj, 'StartDateTime', 'startDateTime', 'startedAt') || undefined;
  const endedAt =
    pick(obj, 'EndDateTime', 'endDateTime', 'endedAt', 'DateTime') ||
    undefined;
  const durationSec = parseDurationSec(
    obj.DurationInSeconds ?? obj.durationInSeconds ?? obj.durationSec,
  );

  const lower = eventType.toLowerCase();
  const isOutbound = lower.includes('outgoing') || lower.includes('outbound');
  const isStarted =
    lower.includes('started') ||
    lower.includes('ringing') ||
    lower.includes('transferstarted');
  const isEnded =
    lower.includes('ended') ||
    lower.includes('completed') ||
    lower.includes('hangup');

  let status: string = 'completed';
  if (isStarted && !isEnded) {
    status = 'ringing';
  } else if (isEnded) {
    const result = obj.Result ?? obj.result;
    if (result === false || result === 'false' || result === 0) {
      status = durationSec && durationSec > 0 ? 'completed' : 'missed';
    } else if (result === true || result === 'true' || result === 1) {
      status = 'completed';
    } else {
      status = 'completed';
    }
  }

  const recordingId = pick(
    obj,
    'RecordingId',
    'recordingId',
    'RecordId',
    'recordId',
  );

  // inbound: from=مشتری، to=همکار/مقصد انتقال یا خود خط
  // outbound: from=همکار، to=مشتری (TransferredToNumber)
  let from = caller || undefined;
  let to: string | undefined;
  if (isOutbound) {
    to = transferred || undefined;
  } else {
    to = transferred || lineExtension || undefined;
  }

  const event: VoipWebhookEvent = {
    callId,
    direction: isOutbound ? 'outbound' : 'inbound',
    status,
    from,
    to,
    lineExtension,
    startedAt,
    endedAt,
    durationSec,
    caller: from,
    callee: to,
  };
  if (recordingId) {
    event.recordingUrl = daftareshomaRecordingRef(recordingId);
  }
  return event;
}

export function isDaftaresomaWebhookPayload(body: unknown): boolean {
  if (!body || typeof body !== 'object') return false;
  const obj = body as Loose;
  return Boolean(
    pick(obj, 'EventType', 'eventType') ||
      (pick(obj, 'CallId') && pick(obj, 'CallerNumber', 'callerNumber')),
  );
}