packages/SettingsLib/Spa/gallery/src/com/android/settingslib/spa/gallery/page/PreferencePage.kt

/*
 * Copyright (C) 2022 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.settingslib.spa.gallery.page

import android.os.Bundle
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.outlined.DisabledByDefault
import androidx.compose.material.icons.outlined.TouchApp
import androidx.compose.runtime.Composable
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.derivedStateOf
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.produceState
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.tooling.preview.Preview
import com.android.settingslib.spa.framework.api.SettingsPageProvider
import com.android.settingslib.spa.framework.compose.navigator
import com.android.settingslib.spa.framework.compose.toState
import com.android.settingslib.spa.framework.theme.SettingsTheme
import com.android.settingslib.spa.widget.preference.Preference
import com.android.settingslib.spa.widget.preference.PreferenceModel
import com.android.settingslib.spa.widget.ui.SettingsIcon
import kotlinx.coroutines.delay

object PreferencePageProvider : SettingsPageProvider {
    override val name = Destinations.Preference

    @Composable
    override fun Page(arguments: Bundle?) {
        PreferencePage()
    }

    @Composable
    fun EntryItem() {
        Preference(object : PreferenceModel {
            override val title = "Sample Preference"
            override val onClick = navigator(Destinations.Preference)
        })
    }
}

@Composable
private fun PreferencePage() {
    Column(Modifier.verticalScroll(rememberScrollState())) {
        Preference(object : PreferenceModel {
            override val title = "Preference"
        })

        Preference(object : PreferenceModel {
            override val title = "Preference"
            override val summary = "With summary".toState()
        })

        Preference(object : PreferenceModel {
            override val title = "Preference"
            override val summary = produceState(initialValue = " ") {
                delay(1000L)
                value = "Async summary"
            }
        })

        var count by rememberSaveable { mutableStateOf(0) }
        Preference(object : PreferenceModel {
            override val title = "Click me"
            override val summary = derivedStateOf { count.toString() }
            override val onClick: (() -> Unit) = { count++ }
            override val icon = @Composable {
                SettingsIcon(imageVector = Icons.Outlined.TouchApp)
            }
        })

        var ticks by rememberSaveable { mutableStateOf(0) }
        LaunchedEffect(ticks) {
            delay(1000L)
            ticks++
        }
        Preference(object : PreferenceModel {
            override val title = "Ticker"
            override val summary = derivedStateOf { ticks.toString() }
        })

        Preference(object : PreferenceModel {
            override val title = "Disabled"
            override val summary = "Disabled".toState()
            override val enabled = false.toState()
            override val icon = @Composable {
              SettingsIcon(imageVector = Icons.Outlined.DisabledByDefault)
            }
        })
    }
}

@Preview(showBackground = true)
@Composable
private fun PreferencePagePreview() {
    SettingsTheme {
        PreferencePage()
    }
}