EditOverviewFragment.kt

/*
 * Copyright 2016-2020 Open Food Facts
 *
 * 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
 *
 * https://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 openfoodfacts.github.scrachx.openfood.features.product.edit.overview

import android.content.Intent
import android.content.SharedPreferences
import android.net.Uri
import android.os.Bundle
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ArrayAdapter
import android.widget.Toast
import androidx.core.net.toFile
import androidx.core.text.buildSpannedString
import androidx.fragment.app.viewModels
import androidx.lifecycle.lifecycleScope
import com.canhub.cropper.CropImage
import com.google.android.material.snackbar.BaseTransientBottomBar
import com.google.android.material.snackbar.Snackbar
import com.google.zxing.integration.android.IntentIntegrator
import com.hootsuite.nachos.NachoTextView
import com.hootsuite.nachos.terminator.ChipTerminatorHandler
import com.hootsuite.nachos.validator.ChipifyingNachoValidator
import com.squareup.picasso.Callback
import com.squareup.picasso.Picasso
import dagger.hilt.android.AndroidEntryPoint
import kotlinx.coroutines.rx2.awaitSingleOrNull
import openfoodfacts.github.scrachx.openfood.AppFlavors.OBF
import openfoodfacts.github.scrachx.openfood.AppFlavors.OFF
import openfoodfacts.github.scrachx.openfood.AppFlavors.OPF
import openfoodfacts.github.scrachx.openfood.AppFlavors.isFlavors
import openfoodfacts.github.scrachx.openfood.R
import openfoodfacts.github.scrachx.openfood.analytics.AnalyticsView
import openfoodfacts.github.scrachx.openfood.analytics.MatomoAnalytics
import openfoodfacts.github.scrachx.openfood.customtabs.CustomTabActivityHelper
import openfoodfacts.github.scrachx.openfood.customtabs.CustomTabsHelper
import openfoodfacts.github.scrachx.openfood.customtabs.WebViewFallback
import openfoodfacts.github.scrachx.openfood.databinding.FragmentAddProductOverviewBinding
import openfoodfacts.github.scrachx.openfood.features.adapters.autocomplete.EmbCodeAutoCompleteAdapter
import openfoodfacts.github.scrachx.openfood.features.adapters.autocomplete.PeriodAfterOpeningAutoCompleteAdapter
import openfoodfacts.github.scrachx.openfood.features.product.edit.ProductEditActivity
import openfoodfacts.github.scrachx.openfood.features.product.edit.ProductEditActivity.Companion.KEY_PERFORM_OCR
import openfoodfacts.github.scrachx.openfood.features.product.edit.ProductEditActivity.Companion.KEY_SEND_UPDATED
import openfoodfacts.github.scrachx.openfood.features.product.edit.ProductEditFragment
import openfoodfacts.github.scrachx.openfood.images.ProductImage
import openfoodfacts.github.scrachx.openfood.models.DaoSession
import openfoodfacts.github.scrachx.openfood.models.Product
import openfoodfacts.github.scrachx.openfood.models.ProductImageField
import openfoodfacts.github.scrachx.openfood.models.entities.OfflineSavedProduct
import openfoodfacts.github.scrachx.openfood.models.entities.category.CategoryNameDao
import openfoodfacts.github.scrachx.openfood.models.entities.country.CountryNameDao
import openfoodfacts.github.scrachx.openfood.models.entities.label.LabelNameDao
import openfoodfacts.github.scrachx.openfood.models.entities.tag.TagDao
import openfoodfacts.github.scrachx.openfood.network.ApiFields
import openfoodfacts.github.scrachx.openfood.network.ApiFields.Keys.lcProductNameKey
import openfoodfacts.github.scrachx.openfood.network.OpenFoodAPIClient
import openfoodfacts.github.scrachx.openfood.utils.*
import openfoodfacts.github.scrachx.openfood.utils.FileDownloader.download
import org.apache.commons.lang3.StringUtils
import org.jetbrains.annotations.Contract
import java.io.File
import java.util.*
import javax.inject.Inject

/**
 * Product Overview fragment of AddProductActivity
 */
@AndroidEntryPoint
class EditOverviewFragment : ProductEditFragment() {
    private var _binding: FragmentAddProductOverviewBinding? = null
    private val binding get() = _binding!!

    private val viewModel: EditOverviewViewModel by viewModels()

    @Inject
    lateinit var daoSession: DaoSession

    @Inject
    lateinit var picasso: Picasso

    @Inject
    lateinit var client: OpenFoodAPIClient

    @Inject
    lateinit var matomoAnalytics: MatomoAnalytics

    @Inject
    lateinit var sharedPreferences: SharedPreferences

    @Inject
    lateinit var localeManager: LocaleManager

    private val appLocale by lazy { localeManager.getLocale() }
    private val appLang by lazy { appLocale.language }

    private val photoReceiverHandler by lazy {
        PhotoReceiverHandler(sharedPreferences) { newPhotoFile ->
            photoFile = newPhotoFile
            val image: ProductImage
            val position: Int
            if (isFrontImagePresent) {
                image = ProductImage(barcode!!, ProductImageField.FRONT, newPhotoFile, appLang)
                frontImageUrl = newPhotoFile.absolutePath
                position = 0
            } else {
                image = ProductImage(barcode!!, ProductImageField.OTHER, newPhotoFile, appLang)
                position = 3
            }
            image.filePath = newPhotoFile.toURI().path
            (activity as? ProductEditActivity)?.savePhoto(image, position)

            hideImageProgress(false, StringUtils.EMPTY)
        }
    }

    private var barcode: String? = null
    private var editingMode = false
    private var isFrontImagePresent = false
    private var languageCode: String? = null
    private var frontImageUrl: String? = null
    private var savedProduct: OfflineSavedProduct? = null
    private var photoFile: File? = null
    private var product: Product? = null

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
        _binding = FragmentAddProductOverviewBinding.inflate(inflater)
        return binding.root
    }

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

        binding.btnOtherPictures.setCompoundDrawablesWithIntrinsicBounds(R.drawable.ic_add_a_photo_blue_18dp, 0, 0, 0)

        binding.btnNext.setOnClickListener { next() }
        binding.imgFront.setOnClickListener { openFrontImage() }
        binding.btnEditImgFront.setOnClickListener { chooseOrTakeFrontImage() }
        binding.btnOtherPictures.setOnClickListener { chooseOrTakeOtherImage() }
        binding.sectionManufacturingDetails.setOnClickListener { toggleManufacturingSectionVisibility() }
        binding.sectionPurchasingDetails.setOnClickListener { togglePurchasingSectionVisibility() }
        binding.extractUrlText.setOnClickListener { scanProductLink() }
        binding.searchUrlText.setOnClickListener { searchProductLink() }
        binding.language.setOnClickListener { selectProductLanguage() }

        //checks the information about the prompt clicked and takes action accordingly
        if (requireActivity().intent.getBooleanExtra(ProductEditActivity.KEY_MODIFY_CATEGORY_PROMPT, false)) {
            binding.categories.requestFocus()
        } else if (requireActivity().intent.getBooleanExtra(ProductEditActivity.KEY_MODIFY_NUTRITION_PROMPT, false)) {
            (requireActivity() as ProductEditActivity).proceed()
        }

        val args = arguments
        if (args == null) {
            Toast.makeText(activity, R.string.error_adding_product_details, Toast.LENGTH_SHORT).show()
            requireActivity().finish()
            return
        }

        product = args.getSerializable("product") as Product?
        savedProduct = getEditOfflineProductFromArgs()
        editingMode = args.getBoolean(ProductEditActivity.KEY_IS_EDITING)


        binding.language.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_arrow_drop_down, 0)
        binding.sectionManufacturingDetails.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_keyboard_arrow_down_grey_24dp, 0)
        binding.sectionPurchasingDetails.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_keyboard_arrow_down_grey_24dp, 0)

        if (product != null) {
            barcode = product!!.code
        }

        if (editingMode && product != null) {
            barcode = product!!.code

            val languageToUse = if (product!!.isLanguageSupported(appLang)) appLang
            else product!!.lang

            preFillProductValues(product!!, getLCOrDefault(languageToUse))
        } else if (savedProduct != null) {
            barcode = savedProduct!!.barcode
            preFillValuesFromOffline(savedProduct!!)
        } else {
            // Addition
            enableFastAdditionMode(requireContext().isFastAdditionMode())
        }

        binding.barcode.text = "${getString(R.string.txtBarcode)} $barcode"

        if (isFlavors(OBF, OPF)) {
            binding.btnOtherPictures.visibility = View.GONE
        }
        if (args.getBoolean(KEY_PERFORM_OCR)) {
            (activity as ProductEditActivity).proceed()
        }
        if (args.getBoolean(KEY_SEND_UPDATED)) {
            (activity as ProductEditActivity).proceed()
        }

        initializeChips()

        setupAutoSuggestion()

        if (activity is ProductEditActivity && (activity as ProductEditActivity).initialValues != null) {
            addAllFieldsToMap((activity as ProductEditActivity).initialValues!!)
        }
        if (languageCode.isNullOrEmpty()) {
            setProductLanguage(appLang)
        }
    }

    override fun onResume() {
        super.onResume()
        matomoAnalytics.trackView(AnalyticsView.ProductEditOverview)
    }

    override fun onDestroyView() {
        super.onDestroyView()
        _binding = null
    }

    /**
     * To enable fast addition mode
     *
     * @param enabled
     */
    private fun enableFastAdditionMode(enabled: Boolean) {
        val visibility = if (enabled) View.GONE else View.VISIBLE

        binding.sectionManufacturingDetails.visibility = visibility
        binding.sectionPurchasingDetails.visibility = visibility
        binding.packaging.visibility = visibility
        binding.label.visibility = visibility
        binding.periodOfTimeAfterOpeningTil.visibility = visibility

        changeVisibilityManufacturingSectionTo(visibility)
        changePurchasingSectionVisibilityTo(visibility)

        binding.greyLine2.visibility = visibility
        binding.greyLine3.visibility = visibility
        binding.greyLine4.visibility = visibility
    }

    /**
     * Pre fill the fields of the product which are already present on the server.
     */
    private fun preFillProductValues(product: Product, productLang: String) {
        if (!product.productName.isNullOrEmpty()) {
            binding.name.setText(product.productName)
        }
        if (!product.quantity.isNullOrEmpty()) {
            binding.quantity.setText(product.quantity)
        }
        if (!product.brands.isNullOrEmpty()) {
            binding.brand.setText(extractProductBrandsChipsValues(product))
        }
        if (!product.packaging.isNullOrEmpty()) {
            binding.packaging.setText(extractProductPackagingChipsValues(product))
        }
        if (!product.categoriesTags.isNullOrEmpty()) {
            binding.categories.setText(extractProductCategoriesChipsValues(product))
        }
        if (!product.labelsTags.isNullOrEmpty()) {
            binding.label.setText(extractProductTagsChipsValues(product))
        }
        if (!product.origins.isNullOrEmpty()) {
            binding.originOfIngredients.setText(extractProductOriginsChipsValues(product))
        }
        if (!product.manufacturingPlaces.isNullOrEmpty()) {
            binding.manufacturingPlace.setText(product.manufacturingPlaces)
        }
        if (product.embTags.toString().trim { it <= ' ' } != "[]") {
            binding.embCode.setText(extractProductEmbTagsChipsValues(product))
        }
        if (!product.manufacturerUrl.isNullOrEmpty()) {
            binding.link.setText(product.manufacturerUrl)
        }
        if (!product.purchasePlaces.isNullOrEmpty()) {
            binding.countryWherePurchased.setText(extractProductPurchasePlaces(product))
        }
        if (!product.stores.isNullOrEmpty()) {
            binding.stores.setText(extractProductStoresChipValues(product))
        }
        if (!product.countriesTags.isNullOrEmpty()) {
            val chipValues = extractProductCountriesTagsChipValues(product).toMutableList()
            //Also add the country set by the user in preferences
            val savedCountry = sharedPreferences.getString(getString(R.string.pref_country_key), "") ?: ""

            if (savedCountry.isNotEmpty()) chipValues.add(savedCountry)

            binding.countriesWhereSold.setText(chipValues)
        }
        setProductLanguage(productLang)
    }

    @Contract("null -> new")
    private fun extractProductCountriesTagsChipValues(product: Product?) =
        product?.countriesTags?.map { getCountryName(appLang, it) } ?: emptyList()

    @Contract("null -> new")
    private fun extractProductStoresChipValues(product: Product?) =
        product?.stores?.split(',')?.map { it.trim() } ?: emptyList()

    @Contract("null -> new")
    private fun extractProductPurchasePlaces(product: Product?) =
        product?.purchasePlaces?.split(',')?.map { it.trim() } ?: emptyList()

    @Contract("null -> new")
    private fun extractProductEmbTagsChipsValues(product: Product?) = (product?.embTags ?: emptyList())
        .toString().removeSurrounding("[", "]")
        .split(",")
        .map { getEmbCode(it.trim()) }

    @Contract("null -> new")
    private fun extractProductOriginsChipsValues(product: Product?) =
        product?.origins?.split(Regex("\\s*,\\s*")) ?: emptyList()

    @Contract("null -> new")
    private fun extractProductTagsChipsValues(product: Product?) =
        product?.labelsTags?.map { getLabelName(appLang, it) } ?: emptyList()

    @Contract("null -> new")
    private fun extractProductCategoriesChipsValues(product: Product?) =
        product?.categoriesTags?.map { getCategoryName(appLang, it) } ?: emptyList()

    @Contract("null -> new")
    private fun extractProductPackagingChipsValues(product: Product?) =
        product?.packaging?.split(',')?.map { it.trim() } ?: emptyList()

    @Contract("null -> new")
    private fun extractProductBrandsChipsValues(product: Product?) =
        product?.brands?.split(',')?.map { it.trim() } ?: emptyList()

    /**
     * Loads front image of the product into the imageview
     *
     * @param language language used for adding product
     */
    private fun loadFrontImage(language: String?) {
        photoFile = null
        val imageFrontUrl = product!!.getImageFrontUrl(language)
        if (imageFrontUrl != null && imageFrontUrl.isNotEmpty()) {
            frontImageUrl = imageFrontUrl
            binding.imageProgress.visibility = View.VISIBLE
            binding.btnEditImgFront.visibility = View.INVISIBLE
            picasso
                .load(imageFrontUrl)
                .resize(requireContext().dpsToPixel(50), requireContext().dpsToPixel(50))
                .centerInside()
                .into(binding.imgFront, object : Callback {
                    override fun onSuccess() = frontImageLoaded()

                    override fun onError(ex: Exception) = frontImageLoaded()
                })
        }
    }

    /**
     * @param languageCode 2 letter language code. example hi, en etc.
     * @param tag the complete tag. example en:india
     * @return returns the name of the country if found in the db or else returns the tag itself.
     */
    private fun getCountryName(languageCode: String?, tag: String) =
        daoSession.countryNameDao.unique {
            where(CountryNameDao.Properties.CountyTag.eq(tag))
            where(CountryNameDao.Properties.LanguageCode.eq(languageCode))
        }?.name ?: tag

    /**
     * @param languageCode 2 letter language code. example de, en etc.
     * @param tag the complete tag. example de:hoher-omega-3-gehalt
     * @return returns the name of the label if found in the db or else returns the tag itself.
     */
    private fun getLabelName(languageCode: String?, tag: String) =
        daoSession.labelNameDao.unique {
            where(LabelNameDao.Properties.LabelTag.eq(tag))
            where(LabelNameDao.Properties.LanguageCode.eq(languageCode))
        }?.name ?: tag

    /**
     * @param languageCode 2 letter language code. example en, fr etc.
     * @param tag the complete tag. example en:plant-based-foods-and-beverages
     * @return returns the name of the category (example Plant-based foods and beverages) if found in the db or else returns the tag itself.
     */
    private fun getCategoryName(languageCode: String?, tag: String): String {
        return daoSession.categoryNameDao.unique {
            where(CategoryNameDao.Properties.CategoryTag.eq(tag))
            where(CategoryNameDao.Properties.LanguageCode.eq(languageCode))
        }?.name ?: tag
    }

    private fun getEmbCode(embTag: String) =
        daoSession.tagDao.unique {
            where(TagDao.Properties.Id.eq(embTag))
        }?.name ?: embTag


    /**
     * Pre fill the fields if the product is already present in SavedProductOffline db.
     */
    private fun preFillValuesFromOffline(savedProduct: OfflineSavedProduct) {


        val productDetails = savedProduct.productDetails

        if (savedProduct.imageFrontLocalUrl != null) {
            binding.imageProgress.visibility = View.VISIBLE
            binding.btnEditImgFront.visibility = View.INVISIBLE
            frontImageUrl = savedProduct.imageFrontLocalUrl

            picasso
                .load(frontImageUrl)
                .resize(requireContext().dpsToPixel(50), requireContext().dpsToPixel(50))
                .centerInside()
                .into(binding.imgFront) { frontImageLoaded() }
        }

        savedProduct.language?.takeUnless { it.isEmpty() }?.let { setProductLanguage(it) }
        savedProduct.name?.takeUnless { it.isEmpty() }?.let { binding.name.setText(it) }

        productDetails[ApiFields.Keys.QUANTITY]?.let { binding.quantity.setText(it) }
        productDetails[ApiFields.Keys.MANUFACTURING_PLACES]?.let { binding.manufacturingPlace.setText(it) }
        productDetails[ApiFields.Keys.LINK]?.let { binding.link.setText(it) }

        preFillChip(productDetails, ApiFields.Keys.BRANDS, binding.brand)
        preFillChip(productDetails, ApiFields.Keys.PACKAGING, binding.packaging)
        preFillChip(productDetails, ApiFields.Keys.CATEGORIES, binding.categories)
        preFillChip(productDetails, ApiFields.Keys.LABELS, binding.label)
        preFillChip(productDetails, ApiFields.Keys.ORIGINS, binding.originOfIngredients)
        preFillChip(productDetails, ApiFields.Keys.EMB_CODES, binding.embCode)
        preFillChip(productDetails, ApiFields.Keys.ADD_PURCHASE, binding.countryWherePurchased)
        preFillChip(productDetails, ApiFields.Keys.ADD_STORES, binding.stores)
        preFillChip(productDetails, ApiFields.Keys.ADD_COUNTRIES, binding.countriesWhereSold)
    }

    private fun frontImageLoaded() {
        binding.imageProgress.visibility = View.GONE
        binding.btnEditImgFront.visibility = View.VISIBLE
    }

    private fun preFillChip(productDetails: Map<String, String?>, paramName: String, nachoTextView: NachoTextView) {
        productDetails[paramName]?.let {
            val chipValues = it.split(',').map(String::trim)
            nachoTextView.setText(chipValues)
        }
    }

    private fun initializeChips() = listOf(
        binding.brand,
        binding.packaging,
        binding.categories,
        binding.label,
        binding.originOfIngredients,
        binding.embCode,
        binding.countryWherePurchased,
        binding.stores,
        binding.countriesWhereSold
    ).forEach { nachoTextView ->
        nachoTextView.addChipTerminator(',', ChipTerminatorHandler.BEHAVIOR_CHIPIFY_CURRENT_TOKEN)
        nachoTextView.setNachoValidator(ChipifyingNachoValidator())
        nachoTextView.enableEditChipOnTouch(false, true)
    }


    /**
     * Auto load suggestions into various NachoTextViews
     */
    private fun setupAutoSuggestion() {

        viewModel.suggestCountries.observe(viewLifecycleOwner) { countries ->
            val countryAdapter = ArrayAdapter(
                requireContext(),
                android.R.layout.simple_dropdown_item_1line,
                countries
            )

            binding.originOfIngredients.setAdapter(countryAdapter)
            binding.countryWherePurchased.setAdapter(countryAdapter)
            binding.countriesWhereSold.setAdapter(countryAdapter)
            binding.embCode.setAdapter(
                EmbCodeAutoCompleteAdapter(
                    requireContext(),
                    android.R.layout.simple_dropdown_item_1line,
                    client
                )
            )
        }

        viewModel.suggestLabels.observe(viewLifecycleOwner) { suggestLabels ->
            binding.label.setAdapter(
                ArrayAdapter(
                    requireContext(),
                    android.R.layout.simple_dropdown_item_1line,
                    suggestLabels
                )
            )
        }

        viewModel.suggestCategories.observe(viewLifecycleOwner) { categories ->
            binding.categories.setAdapter(
                ArrayAdapter(
                    requireContext(),
                    android.R.layout.simple_dropdown_item_1line,
                    categories
                )
            )
        }

        viewModel.suggestStores.observe(viewLifecycleOwner) { suggestStores ->
            binding.stores.setAdapter(
                ArrayAdapter(
                    requireContext(),
                    android.R.layout.simple_dropdown_item_1line,
                    suggestStores
                )
            )
        }

        viewModel.suggestBrands.observe(viewLifecycleOwner) { suggestBrands ->
            binding.brand.setAdapter(
                ArrayAdapter(
                    requireContext(),
                    android.R.layout.simple_dropdown_item_1line,
                    suggestBrands
                )
            )
        }

        if (isFlavors(OBF)) {
            binding.periodOfTimeAfterOpeningTil.visibility = View.VISIBLE
            val customAdapter = PeriodAfterOpeningAutoCompleteAdapter(
                requireContext(),
                android.R.layout.simple_dropdown_item_1line,
                client
            )
            binding.periodOfTimeAfterOpening.setAdapter(customAdapter)
        }
    }

    /**
     * Set the language code of the product.
     *
     *
     *
     * @param languageCode the selected product language code.
     */
    private fun setProductLanguage(languageCode: String) {
        this.languageCode = languageCode

        val productLocale = LocaleUtils.parseLocale(languageCode)
        binding.language.text = buildSpannedString {
            append(getString(R.string.product_language))
            append(productLocale.getDisplayName(appLocale).replaceFirstChar { it.titlecase(appLocale) })
        }

        val activity = activity
        (activity as? ProductEditActivity)?.setProductLanguageCode(languageCode)

        if (editingMode) {
            loadFrontImage(languageCode)
            val fields = "ingredients_text_$languageCode,product_name_$languageCode"

            lifecycleScope.launchWhenResumed {
                binding.name.setText(getString(R.string.txtLoading))
                binding.name.isActivated = false

                binding.name.setText(getString(R.string.txtLoading))
                binding.name.isActivated = false

                val productState = try {
                    client.getProductStateFull(product!!.code, fields)
                } catch (err: Exception) {
                    Log.e(EditOverviewFragment::class.simpleName, "Error retrieving product state from server api.", err)
                    binding.name.setText(StringUtils.EMPTY)
                    binding.name.isActivated = true
                    return@launchWhenResumed
                }

                if (productState.status != 1L) {
                    Log.e(
                        EditOverviewFragment::class.simpleName,
                        "Retrieved product with code ${productState.code}, but status was not successful."
                    )
                    binding.name.setText(StringUtils.EMPTY)
                    binding.name.isActivated = true
                    return@launchWhenResumed
                }
                val product = productState.product!!
                if (product.getProductName(languageCode) != null) {
                    if (this@EditOverviewFragment.languageCode == languageCode) {
                        binding.name.setText(product.getProductName(languageCode))
                        binding.name.isActivated = true
                        if (activity is ProductEditActivity) {
                            activity.setIngredients("set", product.getIngredientsText(languageCode))
                            activity.updateLanguage()
                        }
                    }
                } else {
                    binding.name.setText(StringUtils.EMPTY)
                    binding.name.isActivated = true
                    (activity as? ProductEditActivity)?.setIngredients("set", null)
                }
            }

        }
    }

    override fun allValid() = if (!frontImageUrl.isNullOrEmpty()) true
    else {
        Snackbar.make(binding.root, R.string.add_at_least_one_picture, BaseTransientBottomBar.LENGTH_SHORT).show()
        binding.scrollView.fullScroll(View.FOCUS_UP)
        false
    }

    private fun openFrontImage() {
        if (frontImageUrl == null) {
            // No image, take one
            chooseOrTakeFrontImage()
        } else {
            // Image found, download it if necessary and edit it
            isFrontImagePresent = true
            if (photoFile == null) {
                lifecycleScope.launchWhenResumed {
                    val uri = download(requireContext(), frontImageUrl!!, client).awaitSingleOrNull() ?: return@launchWhenResumed

                    photoFile = uri.toFile()
                    cropRotateImage(uri, getString(R.string.set_img_front))
                }

            } else {
                cropRotateImage(photoFile!!, getString(R.string.set_img_front))
            }
        }
    }

    private fun chooseOrTakeFrontImage() {
        // add front image.
        isFrontImagePresent = true
        doChooseOrTakePhotos()
    }

    private fun chooseOrTakeOtherImage() {
        isFrontImagePresent = false
        doChooseOrTakePhotos()
    }

    override fun doOnPhotosPermissionGranted() =
        if (isFrontImagePresent) chooseOrTakeOtherImage()
        else openFrontImage()

    /**
     * adds all the fields to the query map even those which are null or empty.
     */
    private fun addAllFieldsToMap(targetMap: MutableMap<String, String?>) {
        chipifyAllUnterminatedTokens()
        if (activity !is ProductEditActivity) return

        val lc = getLCOrDefault(languageCode)
        targetMap[ApiFields.Keys.BARCODE] = barcode
        targetMap[ApiFields.Keys.LANG] = lc
        targetMap[ApiFields.Keys.LC] = appLang
        targetMap[lcProductNameKey(lc)] = binding.name.text.toString()
        targetMap[ApiFields.Keys.QUANTITY] = binding.quantity.text.toString()
        targetMap[ApiFields.Keys.BRANDS] = getNachoValues(binding.brand)
        targetMap[ApiFields.Keys.PACKAGING] = getNachoValues(binding.packaging)
        targetMap[ApiFields.Keys.CATEGORIES] = getNachoValues(binding.categories)
        targetMap[ApiFields.Keys.LABELS] = getNachoValues(binding.label)
        if (isFlavors(OBF)) {
            targetMap[ApiFields.Keys.PERIODS_AFTER_OPENING] = binding.periodOfTimeAfterOpening.text.toString()
        }

        frontImageUrl?.let { targetMap["imageUrl"] = it }

        targetMap[ApiFields.Keys.ORIGINS] = getNachoValues(binding.originOfIngredients)
        targetMap[ApiFields.Keys.MANUFACTURING_PLACES] = binding.manufacturingPlace.text.toString()
        targetMap[ApiFields.Keys.EMB_CODES] = getNachoValues(binding.embCode)
        targetMap[ApiFields.Keys.LINK] = binding.link.text.toString()
        targetMap[ApiFields.Keys.PURCHASE_PLACES] = getNachoValues(binding.countryWherePurchased)
        targetMap[ApiFields.Keys.STORES] = getNachoValues(binding.stores)
        targetMap[ApiFields.Keys.COUNTRIES] = getNachoValues(binding.countriesWhereSold)
    }

    /**
     * adds only those fields to the query map which have changed.
     */
    override fun addUpdatedFieldsToMap(targetMap: MutableMap<String, String?>) {
        chipifyAllUnterminatedTokens()

        if (activity !is ProductEditActivity) return

        barcode?.let { if (it.isNotEmpty()) targetMap[ApiFields.Keys.BARCODE] = it }
        languageCode?.let { if (it.isNotEmpty()) targetMap[ApiFields.Keys.LANG] = it }
        appLang.let { if (it.isNotEmpty()) targetMap[ApiFields.Keys.LC] = it }

        val lc = getLCOrDefault(languageCode)
        if (binding.name.isNotEmpty() && binding.name.isContentDifferent(if (product != null) product!!.getProductName(lc) else null)) {
            targetMap[lcProductNameKey(lc)] = binding.name.text.toString()
        }
        if (binding.quantity.isNotEmpty() && binding.quantity.isContentDifferent(if (product != null) product!!.quantity else null)) {
            targetMap[ApiFields.Keys.QUANTITY] = binding.quantity.text.toString()
        }
        if (binding.brand.areChipsDifferent(extractProductBrandsChipsValues(product))) {
            targetMap[ApiFields.Keys.BRANDS] = getNachoValues(binding.brand)
        }
        if (binding.packaging.areChipsDifferent(extractProductPackagingChipsValues(product))) {
            targetMap[ApiFields.Keys.PACKAGING] = getNachoValues(binding.packaging)
        }
        if (binding.categories.areChipsDifferent(extractProductCategoriesChipsValues(product))) {
            targetMap[ApiFields.Keys.CATEGORIES] = getNachoValues(binding.categories)
        }
        if (binding.label.areChipsDifferent(extractProductTagsChipsValues(product))) {
            targetMap[ApiFields.Keys.LABELS] = getNachoValues(binding.label)
        }
        if (binding.periodOfTimeAfterOpening.isNotEmpty()) {
            targetMap[ApiFields.Keys.PERIODS_AFTER_OPENING] = binding.periodOfTimeAfterOpening.text.toString()
        }
        frontImageUrl?.let { targetMap["imageUrl"] = it }
        if (binding.originOfIngredients.areChipsDifferent(extractProductOriginsChipsValues(product))) {
            targetMap[ApiFields.Keys.ORIGINS] = getNachoValues(binding.originOfIngredients)
        }
        if (binding.manufacturingPlace.isNotEmpty()
            && binding.manufacturingPlace.isContentDifferent(if (product != null) product!!.manufacturingPlaces else null)
        ) {
            targetMap[ApiFields.Keys.MANUFACTURING_PLACES] = binding.manufacturingPlace.text.toString()
        }
        if (binding.embCode.areChipsDifferent(extractProductEmbTagsChipsValues(product))) {
            targetMap[ApiFields.Keys.EMB_CODES] = getNachoValues(binding.embCode)
        }
        if (binding.link.isNotEmpty()
            && binding.link.isContentDifferent(if (product != null) product!!.manufacturerUrl else null)
        ) {
            targetMap[ApiFields.Keys.LINK] = binding.link.text.toString()
        }
        if (binding.countryWherePurchased.areChipsDifferent(extractProductPurchasePlaces(product))) {
            targetMap[ApiFields.Keys.PURCHASE_PLACES] = getNachoValues(binding.countryWherePurchased)
        }
        if (binding.stores.areChipsDifferent(extractProductStoresChipValues(product))) {
            targetMap[ApiFields.Keys.STORES] = getNachoValues(binding.stores)
        }
        if (binding.countriesWhereSold.areChipsDifferent(extractProductCountriesTagsChipValues(product))) {
            targetMap[ApiFields.Keys.COUNTRIES] = getNachoValues(binding.countriesWhereSold)
        }
    }

    /**
     * Chipifies all existing plain text in all the NachoTextViews.
     */
    private fun chipifyAllUnterminatedTokens() = listOf(
        binding.brand,
        binding.packaging,
        binding.categories,
        binding.label,
        binding.originOfIngredients,
        binding.embCode,
        binding.countryWherePurchased,
        binding.stores,
        binding.countriesWhereSold
    ).forEach { it.chipifyAllUnterminatedTokens() }

    @Contract(pure = true)
    private fun getNachoValues(nachoTextView: NachoTextView) = nachoTextView.chipValues.joinToString(",")

    private fun toggleManufacturingSectionVisibility() {
        if (binding.manufacturingPlaceTil.visibility != View.VISIBLE) {
            changeVisibilityManufacturingSectionTo(View.VISIBLE)
            binding.originOfIngredients.requestFocus()
            binding.sectionManufacturingDetails.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_keyboard_arrow_up_grey_24dp, 0)
        } else {
            changeVisibilityManufacturingSectionTo(View.GONE)
            binding.sectionManufacturingDetails.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_keyboard_arrow_down_grey_24dp, 0)
        }
    }

    private fun changeVisibilityManufacturingSectionTo(visibility: Int) {
        binding.originOfIngredientsTil.visibility = visibility
        binding.originHint.visibility = visibility
        binding.manufacturingPlaceTil.visibility = visibility
        binding.embCodeTil.visibility = visibility
        binding.linkTil.visibility = visibility
        binding.linearLayout.visibility = visibility
        binding.traceHint.visibility = visibility
        if (isFlavors(OFF))
            binding.originWarning.visibility = visibility
    }

    private fun togglePurchasingSectionVisibility() {
        if (binding.storesTil.visibility != View.VISIBLE) {
            changePurchasingSectionVisibilityTo(View.VISIBLE)
            binding.countryWherePurchased.requestFocus()
            binding.sectionPurchasingDetails.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_keyboard_arrow_up_grey_24dp, 0)
        } else {
            changePurchasingSectionVisibilityTo(View.GONE)
            binding.sectionPurchasingDetails.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_keyboard_arrow_down_grey_24dp, 0)
        }
    }

    private fun changePurchasingSectionVisibilityTo(visibility: Int) {
        binding.countryWherePurchasedTil.visibility = visibility
        binding.storesTil.visibility = visibility
        binding.countriesWhereSoldTil.visibility = visibility
    }

    private fun searchProductLink() {
        var url = "https://www.google.com/search?q=$barcode"
        if (binding.brand.chipAndTokenValues.isNotEmpty()) {
            val brandNames = binding.brand.chipAndTokenValues
            url = "$url ${brandNames.joinToString(" ")}"
        }
        if (binding.name.isNotEmpty()) {
            url = "$url ${binding.name.getContent()}"
        }
        url = "$url ${getString(R.string.official_website)}"
        val customTabsIntent = CustomTabsHelper.getCustomTabsIntent(requireActivity(), null)
        CustomTabActivityHelper.openCustomTab(requireActivity(), customTabsIntent, Uri.parse(url), WebViewFallback())
    }

    private fun scanProductLink() {
        val integrator = IntentIntegrator.forSupportFragment(this)
        integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE)
        integrator.setRequestCode(INTENT_INTEGRATOR_REQUEST_CODE)
        integrator.setPrompt(getString(R.string.scan_QR_code))
        integrator.initiateScan()
    }

    private fun selectProductLanguage() {
        ProductLanguagePicker.showPicker(requireContext(), languageCode) { code ->
            binding.name.text = null
            (activity as? ProductEditActivity)?.setIngredients("set", null)
            setProductLanguage(code)
        }
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        // Scanned QR code returned
        if (requestCode == INTENT_INTEGRATOR_REQUEST_CODE) {
            val result = IntentIntegrator.parseActivityResult(resultCode, data)
            if (result.contents != null) {
                binding.link.setText(result.contents)
                binding.link.requestFocus()
            }
        }
        // Returning from editing image
        if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE) {
            isFrontImagePresent = true
        }
        photoReceiverHandler.onActivityResult(this, requestCode, resultCode, data)
    }

    override fun showImageProgress() {
        if (!isAdded) return
        binding.imageProgress.visibility = View.VISIBLE
        binding.imageProgressText.visibility = View.VISIBLE
        binding.imgFront.visibility = View.INVISIBLE
        binding.btnEditImgFront.visibility = View.INVISIBLE
    }

    override fun hideImageProgress(errorInUploading: Boolean, message: String) {
        if (!isAdded) return
        binding.imageProgress.visibility = View.GONE
        binding.imageProgressText.visibility = View.GONE
        binding.imgFront.visibility = View.VISIBLE
        binding.btnEditImgFront.visibility = View.VISIBLE
        if (!errorInUploading) {
            picasso.load(photoFile!!)
                .resize(requireContext().dpsToPixel(50), requireContext().dpsToPixel(50))
                .centerInside()
                .into(binding.imgFront)
        }
    }

    fun showOtherImageProgress() {
        binding.otherImageProgress.visibility = View.VISIBLE
        binding.otherImageProgressText.visibility = View.VISIBLE
        binding.otherImageProgressText.setText(R.string.toastSending)
    }

    fun hideOtherImageProgress(errorUploading: Boolean, message: String?) {
        binding.otherImageProgress.visibility = View.GONE
        if (errorUploading) {
            binding.otherImageProgressText.visibility = View.GONE
            Toast.makeText(activity, message, Toast.LENGTH_SHORT).show()
        } else {
            binding.otherImageProgressText.setText(R.string.image_uploaded_successfully)
        }
    }

    private fun getLCOrDefault(languageCode: String?) =
        if (!languageCode.isNullOrEmpty()) languageCode else ApiFields.Defaults.DEFAULT_LANGUAGE

    companion object {
        private const val INTENT_INTEGRATOR_REQUEST_CODE = 1
    }
}