package be.mygod.vpnhotspot

import android.os.Bundle
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.view.ViewStub
import android.widget.ArrayAdapter
import android.widget.Button
import android.widget.Spinner
import androidx.annotation.StringRes
import androidx.appcompat.app.AlertDialog
import androidx.core.net.toUri
import androidx.core.os.bundleOf
import androidx.fragment.app.DialogFragment
import com.android.billingclient.api.*
import com.crashlytics.android.Crashlytics

/**
 * Based on: https://github.com/PrivacyApps/donations/blob/747d36a18433c7e9329691054122a8ad337a62d2/Donations/src/main/java/org/sufficientlysecure/donations/DonationsFragment.java
 */
class EBegFragment : DialogFragment(), PurchasesUpdatedListener, BillingClientStateListener,
        SkuDetailsResponseListener, ConsumeResponseListener {
    companion object {
        private const val TAG = "EBegFragment"
        private const val KEY_TITLE = "title"
        private const val KEY_MESSAGE = "message"
    }

    class MessageDialogFragment : DialogFragment() {
        override fun onCreateDialog(savedInstanceState: Bundle?) = AlertDialog.Builder(requireContext()).apply {
            val arguments = arguments!!
            setTitle(arguments.getInt(KEY_TITLE, 0))
            setMessage(arguments.getInt(KEY_MESSAGE, 0))
            setNeutralButton(R.string.donations__button_close, null)
        }.create()
    }

    private lateinit var billingClient: BillingClient
    private lateinit var googleSpinner: Spinner
    private var skus: MutableList<SkuDetails>? = null
        set(value) {
            field = value
            googleSpinner.apply {
                val adapter = ArrayAdapter(context ?: return, android.R.layout.simple_spinner_item,
                        value?.map { it.price } ?: listOf("…"))
                adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
                setAdapter(adapter)
            }
        }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View =
            inflater.inflate(R.layout.fragment_ebeg, container, false)
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        googleSpinner = view.findViewById(R.id.donations__google_android_market_spinner)
        onBillingServiceDisconnected()
        view.findViewById<Button>(R.id.donations__google_android_market_donate_button).setOnClickListener {
            val sku = skus?.getOrNull(googleSpinner.selectedItemPosition)
            if (sku == null) {
                openDialog(R.string.donations__google_android_market_not_supported_title,
                        R.string.donations__google_android_market_not_supported)
            } else billingClient.launchBillingFlow(requireActivity(), BillingFlowParams.newBuilder()
                    .setSku(sku.sku).setType(BillingClient.SkuType.INAPP).build())
        }
        @Suppress("ConstantConditionIf")
        if (BuildConfig.DONATIONS) (view.findViewById<ViewStub>(R.id.donations__more_stub).inflate() as Button)
                .setOnClickListener {
                    (activity as MainActivity).launchUrl("https://mygod.be/donate/".toUri())
                }
    }

    private fun openDialog(@StringRes title: Int, @StringRes message: Int) = MessageDialogFragment().apply {
        arguments = bundleOf(Pair(KEY_TITLE, title), Pair(KEY_MESSAGE, message))
    }.show(fragmentManager, "MessageDialogFragment")

    override fun onBillingServiceDisconnected() {
        skus = null
        billingClient = BillingClient.newBuilder(context ?: return).setListener(this).build()
                .also { it.startConnection(this) }
    }
    override fun onBillingSetupFinished(responseCode: Int) {
        if (responseCode == BillingClient.BillingResponse.OK) {
            billingClient.querySkuDetailsAsync(
                    SkuDetailsParams.newBuilder().apply {
                        setSkusList(listOf("donate001", "donate002", "donate005", "donate010", "donate020", "donate050",
                                "donate100", "donate200", "donatemax"))
                        setType(BillingClient.SkuType.INAPP)
                    }.build(), this)
        } else Crashlytics.log(Log.ERROR, TAG, "onBillingSetupFinished: $responseCode")
    }

    override fun onSkuDetailsResponse(responseCode: Int, skuDetailsList: MutableList<SkuDetails>?) {
        if (responseCode == BillingClient.BillingResponse.OK) skus = skuDetailsList
        else Crashlytics.log(Log.ERROR, TAG, "onSkuDetailsResponse: $responseCode")
    }

    override fun onPurchasesUpdated(responseCode: Int, purchases: MutableList<Purchase>?) {
        if (responseCode == BillingClient.BillingResponse.OK && purchases != null) {
            // directly consume in-app purchase, so that people can donate multiple times
            purchases.forEach { billingClient.consumeAsync(it.purchaseToken, this) }
        } else Crashlytics.log(Log.ERROR, TAG, "onPurchasesUpdated: $responseCode")
    }
    override fun onConsumeResponse(responseCode: Int, purchaseToken: String?) {
        if (responseCode == BillingClient.BillingResponse.OK) {
            openDialog(R.string.donations__thanks_dialog_title, R.string.donations__thanks_dialog)
            dismissAllowingStateLoss()
        } else Crashlytics.log(Log.ERROR, TAG, "onConsumeResponse: $responseCode")
    }
}