/* Copyright 2018 charlag
 *
 * This file is a part of Tusky.
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with Tusky; if not,
 * see <http://www.gnu.org/licenses>. */

package com.keylesspalace.tusky.di

import android.app.Activity
import android.app.Application
import android.content.Context
import android.os.Bundle
import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentActivity
import androidx.fragment.app.FragmentManager
import com.keylesspalace.tusky.TuskyApplication
import dagger.android.AndroidInjection
import dagger.android.HasAndroidInjector
import dagger.android.support.AndroidSupportInjection

/**
 * Created by charlag on 3/24/18.
 */

object AppInjector {
    fun init(app: TuskyApplication) {
        DaggerAppComponent.builder().application(app)
            .build().inject(app)

        app.registerActivityLifecycleCallbacks(object : Application.ActivityLifecycleCallbacks {
            override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
                handleActivity(activity)
            }

            override fun onActivityPaused(activity: Activity) {
            }

            override fun onActivityResumed(activity: Activity) {
            }

            override fun onActivityStarted(activity: Activity) {
            }

            override fun onActivityDestroyed(activity: Activity) {
            }

            override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle) {
            }

            override fun onActivityStopped(activity: Activity) {
            }
        })
    }

    private fun handleActivity(activity: Activity) {
        if (activity is HasAndroidInjector || activity is Injectable) {
            AndroidInjection.inject(activity)
        }
        if (activity is FragmentActivity) {
            activity.supportFragmentManager.registerFragmentLifecycleCallbacks(
                object : FragmentManager.FragmentLifecycleCallbacks() {
                    override fun onFragmentPreAttached(fm: FragmentManager, f: Fragment, context: Context) {
                        if (f is Injectable) {
                            AndroidSupportInjection.inject(f)
                        }
                    }
                },
                true
            )
        }
    }
}