package com.unity3d.player;

import android.app.Activity;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;

import java.lang.reflect.Constructor;

public class ChannelAdapterManager {
    private static final String TAG = "ChannelAdapterManager";
    private static final String DEFAULT_CHANNEL = "GooglePlay";
    private static final String META_CHANNEL = "com.arkgame.ft.channel";

    private static SDKManager.IChannelSDKAdapter adapter;

    public static SDKManager.IChannelSDKAdapter createSdkAdapter(Activity activity) {
        String channel = readChannel(activity);
        adapter = createAdapter(channel);
        if (adapter instanceof ChannelAdapterBase) {
            ((ChannelAdapterBase) adapter).setup(activity, channel);
        }
        return adapter;
    }

    public static String normalizeSkuList(String msg) {
        if (adapter == null) {
            return msg;
        }
        return adapter.normalizeSkuList(msg);
    }

    private static SDKManager.IChannelSDKAdapter createAdapter(String channel) {
        if (TextUtils.isEmpty(channel) || DEFAULT_CHANNEL.equals(channel)) {
            return new ChannelAdapterBase();
        }

        SDKManager.IChannelSDKAdapter adapter = tryCreateAdapter(
                "com.unity3d.player." + channel + "Adapter");
        if (adapter != null) {
            return adapter;
        }

        return new ChannelAdapterBase();
    }

    private static SDKManager.IChannelSDKAdapter tryCreateAdapter(String adapterClassName) {
        try {
            Class<?> adapterClass = Class.forName(adapterClassName);
            Constructor<?> constructor = adapterClass.getDeclaredConstructor();
            constructor.setAccessible(true);
            Object instance = constructor.newInstance();
            if (instance instanceof SDKManager.IChannelSDKAdapter) {
                return (SDKManager.IChannelSDKAdapter) instance;
            }
            Log.e(TAG, "adapter does not implement IChannelSDKAdapter: " + adapterClassName);
        } catch (Exception e) {
            Log.e(TAG, "create adapter failed: " + adapterClassName, e);
        }

        return null;
    }

    private static String readChannel(Activity activity) {
        if (activity == null) {
            return DEFAULT_CHANNEL;
        }

        try {
            ApplicationInfo appInfo = activity.getPackageManager().getApplicationInfo(
                    activity.getPackageName(),
                    PackageManager.GET_META_DATA);
            Bundle metaData = appInfo.metaData;
            if (metaData == null) {
                return DEFAULT_CHANNEL;
            }
            String value = metaData.getString(META_CHANNEL);
            return TextUtils.isEmpty(value) ? DEFAULT_CHANNEL : value;
        } catch (Exception e) {
            Log.e(TAG, "read channel failed", e);
            return DEFAULT_CHANNEL;
        }
    }
}