# DictionaryRepository.kt

    /*
     * The MIT License
     *
     * Original work sponsored and donated by The Danish Health Data Authority (http://www.sundhedsdatastyrelsen.dk)
     *
     * Copyright (C) 2020 The Danish Health Data Authority (http://www.sundhedsdatastyrelsen.dk)
     *
     *
     * Permission is hereby granted, free of charge, to any person obtaining a copy of
     * this software and associated documentation files (the "Software"), to deal in
     * the Software without restriction, including without limitation the rights to
     * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
     * of the Software, and to permit persons to whom the Software is furnished to do
     * so, subject to the following conditions:
     *
     *
     * The above copyright notice and this permission notice shall be included in all
     * copies or substantial portions of the Software.
     *
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     * SOFTWARE.
     */

    package dk.nsp.domain.repository

    import android.content.Context
    import dk.nsp.api.getBackendApiLayer
    import dk.nsp.domain.dictionary.DictionaryEntry
    import dk.nsp.domain.dictionary.toDomainModel
    import dk.nsp.shared.Failed
    import dk.nsp.shared.Success
    import dk.nsp.shared.util.asyncDefault
    import dk.nsp.util.textmodel.TextModel
    import kotlinx.coroutines.CoroutineScope
    import kotlinx.coroutines.runBlocking

    class DictionaryRepository(context: Context) {
        private val cmsController = context.getBackendApiLayer().cmsController

        private var _cachedDictionary = listOf<DictionaryEntry>()

        private var dictGotten = false

        private val resources = context.resources

        fun getDictionaryEntryFor(scope: CoroutineScope, key: TextModel): DictionaryEntry? {
            // if no dictionary we get it and call ourselves
            val defferedRes = scope.asyncDefault {
                if (_cachedDictionary.isEmpty() && !dictGotten) {
                    getDictionary(scope)

                    getDictionaryEntryFor(scope, key)
                } else if (dictGotten && _cachedDictionary.isNotEmpty()) {
                    _cachedDictionary.firstOrNull { it.title == key.getString(resources) }
                } else {
                    null
                }
            }

            return runBlocking {
                defferedRes.await()
            }
        }

        suspend fun getDictionary(scope: CoroutineScope): List<DictionaryEntry>? {
            val dict = when (val dictionaryRes = cmsController.getDictionary(scope).await()) {
                is Success -> {
                    val domainModels = dictionaryRes.value.map { it.toDomainModel() }

                    _cachedDictionary = domainModels
                    dictGotten = true

                    domainModels
                }
                is Failed -> {
                    dictGotten = true
                    null
                }
            }
            return dict
        }
    }