package com.freeexile.arpg

import android.app.Activity
import android.os.Build
import android.webkit.JavascriptInterface
import android.webkit.WebView
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import org.json.JSONObject

/**
 * High-performance WebKit JavaScript Native Bridge Interface for FreeExile.
 * Exposed to JavaScript under `window.NativeBridge`.
 */
class NativeBridgeInterface(
    private val activity: Activity,
    private val webView: WebView,
    private val hapticManager: HapticFeedbackManager,
    private val billingManager: PlayBillingManager,
    private val integrityManager: PlayIntegrityManager,
    private val scope: CoroutineScope
) {

    /**
     * Triggers tactile vibration using Android VibrationEffect.
     */
    @JavascriptInterface
    fun triggerHaptic(type: String) {
        hapticManager.triggerHaptic(type)
    }

    /**
     * Requests Google Play Integrity API token with cryptographic nonce.
     * Evaluates `window.onPlayIntegrityToken(resultJson)` upon completion.
     */
    @JavascriptInterface
    fun requestPlayIntegrityToken(nonce: String) {
        scope.launch(Dispatchers.IO) {
            val result = integrityManager.requestToken(nonce)
            val json = JSONObject()
            if (result.isSuccess) {
                json.put("success", true)
                json.put("token", result.getOrNull())
                json.put("nonce", nonce)
            } else {
                json.put("success", false)
                json.put("error", result.exceptionOrNull()?.message ?: "Integrity check failed")
            }

            scope.launch(Dispatchers.Main) {
                val script = "if (window.onPlayIntegrityToken) { window.onPlayIntegrityToken(${json}); }"
                webView.evaluateJavascript(script, null)
            }
        }
    }

    /**
     * Initiates Google Play Billing purchase flow for the specified in-app SKU.
     */
    @JavascriptInterface
    fun launchBillingFlow(sku: String) {
        activity.runOnUiThread {
            billingManager.launchBillingFlow(activity, sku)
        }
    }

    /**
     * Returns hardware specifications and OS version info for graphics performance tuning.
     */
    @JavascriptInterface
    fun getDeviceInfo(): String {
        val info = JSONObject()
        info.put("platform", "Android")
        info.put("model", Build.MODEL)
        info.put("manufacturer", Build.MANUFACTURER)
        info.put("osVersion", Build.VERSION.RELEASE)
        info.put("sdkInt", Build.VERSION.SDK_INT)
        return info.toString()
    }

    /**
     * Helper to dispatch generic JSON messages from native layers back to JavaScript.
     */
    fun dispatchToWeb(callbackName: String, jsonPayload: String) {
        activity.runOnUiThread {
            val script = "if (window.$callbackName) { window.$callbackName($jsonPayload); }"
            webView.evaluateJavascript(script, null)
        }
    }
}