import * as Notifications from "expo-notifications";
import * as Device from "expo-device";
import { Platform } from "react-native";

/**
 * Demande les permissions et retourne le token Expo push.
 * Retourne null si non supporté (simulateur, refus de permission).
 */
export async function getExpoPushToken(): Promise<string | null> {
    if (!Device.isDevice) return null;

    const { status: existing } = await Notifications.getPermissionsAsync();
    let finalStatus = existing;

    if (existing !== "granted") {
        const { status } = await Notifications.requestPermissionsAsync();
        finalStatus = status;
    }

    if (finalStatus !== "granted") return null;

    if (Platform.OS === "android") {
        await Notifications.setNotificationChannelAsync("orders", {
            name: "Nouvelles commandes",
            importance: Notifications.AndroidImportance.MAX,
            vibrationPattern: [0, 250, 250, 250],
            sound: "default",
        });
    }

    const tokenData = await Notifications.getExpoPushTokenAsync();
    return tokenData.data;
}