csamsclient/foreground/src/main/java/com/gyf/csams/message/ui/SysMessageActivity.kt

package com.gyf.csams.message.ui

import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.rememberLazyListState
import androidx.compose.material.Card
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.livedata.observeAsState
import androidx.compose.ui.Modifier
import androidx.compose.ui.text.SpanStyle
import androidx.compose.ui.text.buildAnnotatedString
import androidx.compose.ui.text.withStyle
import androidx.compose.ui.unit.dp
import androidx.lifecycle.viewmodel.compose.viewModel
import com.gyf.csams.message.model.*
import com.gyf.csams.uikit.*
import com.gyf.csams.util.format

/**
 * 系统通知
 *
 */
class SysMessageActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            Body { _ ->
                MainFrame(background = {
                    Background(
                        image = BackgroundImage.ActivityMessage,
                        alpha = 0.6F
                    )
                }) {
                    TextTopAppBar(modifier = Modifier.weight(0.1F), title = MessageType.System.desc)
                    Spacer(modifier = Modifier.weight(0.05F))
                    MessageList(modifier = Modifier.weight(0.8F))
                }
            }
        }
    }

    @Composable
    private fun MessageList(
        modifier: Modifier = Modifier,
        model: SysMessageViewModel = viewModel()
    ) {
        val listState = rememberLazyListState()
        val list by model.data.observeAsState()
        Box(modifier = modifier.padding(10.dp)) {
            LazyColumn(state = listState) {
                list?.forEach {
                    item {
                        MessageItem(content = it)
                        Spacer(modifier = Modifier.height(10.dp))
                    }
                }
            }
        }
    }

    @Composable
    private fun MessageItem(modifier: Modifier = Modifier, content: MessageContent) {
        Card(modifier = modifier, backgroundColor = MaterialTheme.colors.background) {
            Column(modifier = Modifier.padding(10.dp)) {
                Text(text = content.type.desc, style = MaterialTheme.typography.h5)
                Spacer(modifier = Modifier.height(5.dp))

                Card(
                    backgroundColor = MaterialTheme.colors.background,
                    modifier = Modifier
                        .fillMaxWidth()
                        .padding(10.dp)
                ) {
                    when (content) {
                        is JoinContent -> JoinMessage(content = content)
                        is ActCheckContent -> ActCheckMessage(content = content)
                        is RenameContent -> RenameMessage(content = content)
                    }
                }

                Spacer(modifier = Modifier.height(10.dp))
                Row(modifier = Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.End) {
                    Text(text = content.createTime.format())
                }
            }
        }
    }

    @Composable
    private fun JoinMessage(content: JoinContent) {
        Text(buildAnnotatedString {
            withStyle(
                style = MaterialTheme.typography.subtitle1.toSpanStyle()
                    .copy(color = MaterialTheme.colors.primary)
            ) {
                append(content.studentName)
            }
            append("申请进入社团")
        })
    }

    @Composable
    private fun ActCheckMessage(content: ActCheckContent) {
        Text(buildAnnotatedString {
            append("\"")
            withStyle(style = SpanStyle(color = MaterialTheme.colors.primary)) {
                append(content.activityName)
            }
            append("\"活动审核不通过")
        })
    }

    @Composable
    private fun RenameMessage(content: RenameContent) {
        Text(buildAnnotatedString {
            withStyle(style = SpanStyle(color = MaterialTheme.colors.primary)) {
                append(content.oldAssociationName)
            }
            append("重命名为")
            withStyle(style = SpanStyle(color = MaterialTheme.colors.secondary)) {
                append(content.newAssociationName)
            }
            append("审核通过")
        })
    }

}