/*
 * Copyright 2019 New Vector Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package im.vector.riotx.features.crypto.verification.choose

import android.app.Activity
import android.content.Intent
import android.os.Bundle
import android.view.View
import com.airbnb.mvrx.fragmentViewModel
import com.airbnb.mvrx.parentFragmentViewModel
import com.airbnb.mvrx.withState
import im.vector.riotx.R
import im.vector.riotx.core.extensions.cleanup
import im.vector.riotx.core.extensions.configureWith
import im.vector.riotx.core.platform.VectorBaseFragment
import im.vector.riotx.core.utils.PERMISSIONS_FOR_TAKING_PHOTO
import im.vector.riotx.core.utils.PERMISSION_REQUEST_CODE_LAUNCH_CAMERA
import im.vector.riotx.core.utils.allGranted
import im.vector.riotx.core.utils.checkPermissions
import im.vector.riotx.features.crypto.verification.VerificationAction
import im.vector.riotx.features.crypto.verification.VerificationBottomSheetViewModel
import im.vector.riotx.features.qrcode.QrCodeScannerActivity
import kotlinx.android.synthetic.main.bottom_sheet_verification_child_fragment.*
import timber.log.Timber
import javax.inject.Inject

class VerificationChooseMethodFragment @Inject constructor(
        val verificationChooseMethodViewModelFactory: VerificationChooseMethodViewModel.Factory,
        val controller: VerificationChooseMethodController
) : VectorBaseFragment(), VerificationChooseMethodController.Listener {

    private val viewModel by fragmentViewModel(VerificationChooseMethodViewModel::class)

    private val sharedViewModel by parentFragmentViewModel(VerificationBottomSheetViewModel::class)

    override fun getLayoutResId() = R.layout.bottom_sheet_verification_child_fragment

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        setupRecyclerView()
    }

    override fun onDestroyView() {
        bottomSheetVerificationRecyclerView.cleanup()
        controller.listener = null
        super.onDestroyView()
    }

    private fun setupRecyclerView() {
        bottomSheetVerificationRecyclerView.configureWith(controller, hasFixedSize = false, disableItemAnimation = true)
        controller.listener = this
    }

    override fun invalidate() = withState(viewModel) { state ->
        controller.update(state)
    }

    override fun doVerifyBySas() = withState(sharedViewModel) { state ->
        sharedViewModel.handle(VerificationAction.StartSASVerification(
                state.otherUserMxItem?.id ?: "",
                state.pendingRequest.invoke()?.transactionId ?: ""))
    }

    override fun openCamera() {
        if (checkPermissions(PERMISSIONS_FOR_TAKING_PHOTO, this, PERMISSION_REQUEST_CODE_LAUNCH_CAMERA)) {
            doOpenQRCodeScanner()
        }
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)

        if (requestCode == PERMISSION_REQUEST_CODE_LAUNCH_CAMERA && allGranted(grantResults)) {
            doOpenQRCodeScanner()
        }
    }

    override fun onClickOnWasNotMe() {
        sharedViewModel.itWasNotMe()
    }

    private fun doOpenQRCodeScanner() {
        QrCodeScannerActivity.startForResult(this)
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)

        if (resultCode == Activity.RESULT_OK) {
            when (requestCode) {
                QrCodeScannerActivity.QR_CODE_SCANNER_REQUEST_CODE -> {
                    val scannedQrCode = QrCodeScannerActivity.getResultText(data)
                    val wasQrCode = QrCodeScannerActivity.getResultIsQrCode(data)

                    if (wasQrCode && !scannedQrCode.isNullOrBlank()) {
                        onRemoteQrCodeScanned(scannedQrCode)
                    } else {
                        Timber.w("It was not a QR code, or empty result")
                    }
                }
            }
        }
    }

    private fun onRemoteQrCodeScanned(remoteQrCode: String) = withState(sharedViewModel) { state ->
        sharedViewModel.handle(VerificationAction.RemoteQrCodeScanned(
                state.otherUserMxItem?.id ?: "",
                state.pendingRequest.invoke()?.transactionId ?: "",
                remoteQrCode
        ))
    }
}
