import { SIPClient } from '@/lib/sip-client';
import type { SIPConfig, ConnectionStatus, CallState } from '@/types/sip';

// Singleton SIP client — survives React StrictMode remounts
let sipClient: SIPClient | null = null;
let connected = false;

type StateUpdater = {
    setConnectionStatus: (status: ConnectionStatus) => void;
    setCallState: (state: CallState) => void;
    setCallerNumber: (number: string | null) => void;
};

let stateUpdater: StateUpdater | null = null;

export function registerSipStateUpdater(updater: StateUpdater) {
    stateUpdater = updater;
}

export function connectSip(config: SIPConfig): void {
    if (connected || sipClient?.isRegistered() || sipClient?.isConnected()) {
        return;
    }

    if (!config.wsServer || !config.uri) {
        console.warn('SIP config incomplete — wsServer and uri required');
        return;
    }

    if (sipClient) {
        sipClient.disconnect();
    }

    connected = true;
    stateUpdater?.setConnectionStatus('connecting');

    sipClient = new SIPClient(
        config,
        (status) => stateUpdater?.setConnectionStatus(status),
        (state, number) => {
            stateUpdater?.setCallState(state);
            if (number !== undefined) stateUpdater?.setCallerNumber(number ?? null);
        },
    );

    sipClient.connect();
}

export function disconnectSip(): void {
    sipClient?.disconnect();
    sipClient = null;
    connected = false;
    stateUpdater?.setConnectionStatus('disconnected');
}

export function getSipClient(): SIPClient | null {
    return sipClient;
}