package dev.lonami.talaria.ui.screens

import androidx.compose.foundation.Image
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.material.Divider
import androidx.compose.material.Icon
import androidx.compose.material.Surface
import androidx.compose.material.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.getValue
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextOverflow
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import androidx.lifecycle.viewmodel.compose.viewModel
import dev.lonami.talaria.R
import dev.lonami.talaria.data.MockDialogRepository
import dev.lonami.talaria.models.Dialog
import dev.lonami.talaria.models.MessageAck
import dev.lonami.talaria.ui.state.DialogViewModel
import dev.lonami.talaria.ui.theme.TalariaTheme
import java.time.format.DateTimeFormatter
import java.time.format.FormatStyle

@Composable
fun Dialog(dialog: Dialog, onDialogSelected: () -> Unit, modifier: Modifier = Modifier) {
    Row(
        modifier = modifier
            .padding(4.dp)
            .clickable(onClick = onDialogSelected)
    ) {
        Image(
            painter = painterResource(R.drawable.ic_launcher_foreground),
            contentDescription = stringResource(R.string.profile_photo),
            contentScale = ContentScale.Fit,
            modifier = Modifier.height(48.dp),
        )
        Column(modifier = Modifier.weight(1.0f)) {
            Text(
                dialog.title,
                fontWeight = FontWeight.SemiBold,
                maxLines = 1,
                overflow = TextOverflow.Ellipsis
            )
            if (dialog.lastMessage != null) {
                Text(
                    stringResource(
                        R.string.message_preview,
                        dialog.lastMessage.sender,
                        dialog.lastMessage.text
                    ),
                    maxLines = 1,
                    overflow = TextOverflow.Ellipsis,
                )
            }
        }
        Column {
            if (dialog.lastMessage != null) {
                Row {
                    when (dialog.lastMessage.ack) {
                        MessageAck.RECEIVED -> {}
                        MessageAck.SENT -> Icon(
                            painterResource(R.drawable.sent),
                            stringResource(R.string.sent)
                        )
                        MessageAck.SEEN -> Icon(
                            painterResource(R.drawable.seen),
                            stringResource(R.string.seen)
                        )
                    }
                    Spacer(Modifier.width(8.dp))
                    Text(
                        dialog.lastMessage.date.format(
                            DateTimeFormatter.ofLocalizedTime(
                                FormatStyle.SHORT
                            )
                        ),
                    )
                }
            }
            if (dialog.pinned) {
                Icon(
                    painterResource(R.drawable.tack),
                    stringResource(R.string.pinned),
                    modifier = Modifier.align(Alignment.End)
                )
            }
        }
    }
}

@Composable
fun DialogList(
    dialogs: List<Dialog>,
    onDialogSelected: (String) -> Unit,
    modifier: Modifier = Modifier,
) {
    LazyColumn(modifier = modifier) {
        items(dialogs.size) {
            Dialog(dialogs[it], onDialogSelected = {
                onDialogSelected(dialogs[it].id)
            })
            Divider(startIndent = 52.dp)
        }
    }
}

@Composable
fun DialogScreen(
    onDialogSelected: (String) -> Unit,
    modifier: Modifier = Modifier,
    dialogViewModel: DialogViewModel = viewModel(),
) {
    val dialogUiState by dialogViewModel.uiState.collectAsState()
    Surface(modifier = modifier) {
        DialogList(dialogUiState.dialogs, onDialogSelected = onDialogSelected)
    }
}

@Preview
@Composable
fun DialogPreview() {
    val viewModel = DialogViewModel(MockDialogRepository())
    TalariaTheme {
        DialogScreen(onDialogSelected = { }, dialogViewModel = viewModel)
    }
}