package expo.modules.appchecker

import android.content.pm.PackageManager
import com.facebook.react.bridge.Promise
import com.facebook.react.bridge.ReactApplicationContext
import com.facebook.react.bridge.ReactContextBaseJavaModule
import com.facebook.react.bridge.ReactMethod

class AppCheckerModule(reactContext: ReactApplicationContext) :
    ReactContextBaseJavaModule(reactContext) {

    private val context = reactContext

    override fun getName(): String = "AppChecker"

    /**
     * 判断指定包名的 App 是否安装
     * @param packageName 完整包名，如 "com.whatsapp"
     * @param promise     返回 true/false
     */
    @ReactMethod
    fun checkAppExists(packageName: String, promise: Promise) {
        val pm: PackageManager = context.packageManager
        try {
            pm.getPackageInfo(packageName, PackageManager.GET_ACTIVITIES)
            promise.resolve(true)
        } catch (e: PackageManager.NameNotFoundException) {
            promise.resolve(false)
        } catch (e: Exception) {
            promise.reject("APP_CHECK_ERROR", "Error checking app: ${e.message}", e)
        }
    }
}