/*
 * Copyright (C) 2023 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.permissioncontroller.role.ui.wear

import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.runtime.Composable
import androidx.compose.runtime.derivedStateOf
import androidx.compose.runtime.getValue
import androidx.compose.runtime.livedata.observeAsState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.stringResource
import androidx.lifecycle.LiveData
import androidx.wear.compose.material.Text
import com.android.permissioncontroller.R
import com.android.permissioncontroller.role.ui.RoleItem
import com.android.permissioncontroller.wear.permission.components.ScrollableScreen
import com.android.permissioncontroller.wear.permission.components.material3.WearPermissionButton
import com.android.permissioncontroller.wear.permission.components.material3.WearPermissionButtonStyle
import com.android.permissioncontroller.wear.permission.components.material3.WearPermissionIconBuilder

@Composable
fun WearDefaultAppListScreen(
    helper: WearDefaultAppListHelper,
    defaultAppsLiveData: LiveData<List<RoleItem>>,
) {
    val defaultAppsState = defaultAppsLiveData.observeAsState(emptyList())
    val defaultApps: List<RoleItem> by remember { derivedStateOf { defaultAppsState.value } }
    val preferences = helper.getPreferences(defaultApps)
    var isLoading by remember { mutableStateOf(true) }

    ScrollableScreen(title = stringResource(R.string.default_apps), isLoading = isLoading) {
        if (preferences.isEmpty()) {
            item { Text(stringResource(R.string.no_default_apps)) }
            return@ScrollableScreen
        }
        preferences.forEach { pref ->
            item {
                WearPermissionButton(
                    label = pref.label,
                    iconBuilder = pref.icon?.let { WearPermissionIconBuilder.builder(it) },
                    style =
                        if (pref.isEnabled) {
                            WearPermissionButtonStyle.Secondary
                        } else {
                            WearPermissionButtonStyle.DisabledLike
                        },
                    secondaryLabel = pref.summary?.toString(),
                    onClick = pref.getOnClicked(),
                    modifier = Modifier.fillMaxWidth(),
                    labelMaxLines = Int.MAX_VALUE,
                    secondaryLabelMaxLines = Integer.MAX_VALUE,
                )
            }
        }
    }
    if (isLoading && defaultApps.isNotEmpty()) {
        isLoading = false
    }
}