/*
 * Copyright (C) 2024 The Android Open Source Project
 *
 * 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 com.android.customization.picker.grid.data.repository

import android.graphics.drawable.Drawable
import com.android.customization.model.grid.GridOptionModel
import com.android.customization.model.grid.ShapeGridManager
import com.android.wallpaper.picker.di.modules.BackgroundDispatcher
import javax.inject.Inject
import javax.inject.Singleton
import kotlinx.coroutines.CoroutineDispatcher
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.combine
import kotlinx.coroutines.flow.map
import kotlinx.coroutines.withContext

@Singleton
class GridRepository2
@Inject
constructor(
    private val manager: ShapeGridManager,
    @BackgroundDispatcher private val bgDispatcher: CoroutineDispatcher,
) {

    val gridOptions: Flow<List<GridOptionModel>> = manager.gridOptions

    val selectedGridOption: Flow<GridOptionModel?> =
        gridOptions.map { gridOptions -> gridOptions.firstOrNull { it.isCurrent } }

    val isGridCustomizationAvailable =
        combine(manager.isCustomizationAvailable, gridOptions) { isCustomizationAvailable, _ ->
            // Call getGridOptions() instead of using gridOptions flow to avoid getting stale replay
            // value
            isCustomizationAvailable && manager.getGridOptions().size > 1
        }

    suspend fun applyGridOption(gridKey: String) =
        withContext(bgDispatcher) { manager.applyGridOption(gridKey) }

    fun getGridOptionDrawable(iconId: Int): Drawable? {
        return manager.getGridOptionDrawable(iconId)
    }
}