amethyst/app/src/main/java/com/vitorpamplona/amethyst/ui/actions/NewPollConsensusThreshold.kt

package com.vitorpamplona.amethyst.ui.components

import androidx.compose.foundation.layout.Arrangement
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.material.MaterialTheme
import androidx.compose.material.OutlinedTextField
import androidx.compose.material.Text
import androidx.compose.material.TextFieldDefaults
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.res.stringResource
import androidx.compose.ui.text.input.KeyboardType
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.vitorpamplona.amethyst.R
import com.vitorpamplona.amethyst.ui.actions.NewPollViewModel

@Composable
fun NewPollConsensusThreshold(pollViewModel: NewPollViewModel) {
    var text by rememberSaveable { mutableStateOf("") }

    pollViewModel.isValidConsensusThreshold.value = true
    if (text.isNotEmpty()) {
        try {
            val int = text.toInt()
            if (int < 0 || int > 100) {
                pollViewModel.isValidConsensusThreshold.value = false
            } else { pollViewModel.consensusThreshold = int }
        } catch (e: Exception) { pollViewModel.isValidConsensusThreshold.value = false }
    }

    val colorInValid = TextFieldDefaults.outlinedTextFieldColors(
        focusedBorderColor = MaterialTheme.colors.error,
        unfocusedBorderColor = Color.Red
    )
    val colorValid = TextFieldDefaults.outlinedTextFieldColors(
        focusedBorderColor = MaterialTheme.colors.primary,
        unfocusedBorderColor = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
    )

    Row(
        Modifier.fillMaxWidth(),
        horizontalArrangement = Arrangement.Center
    ) {
        OutlinedTextField(
            value = text,
            onValueChange = { text = it },
            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
            modifier = Modifier.width(150.dp),
            colors = if (pollViewModel.isValidConsensusThreshold.value) colorValid else colorInValid,
            label = {
                Text(
                    text = stringResource(R.string.poll_consensus_threshold),
                    color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
                )
            },
            placeholder = {
                Text(
                    text = stringResource(R.string.poll_consensus_threshold_percent),
                    color = MaterialTheme.colors.onSurface.copy(alpha = 0.32f)
                )
            }
        )
    }
}

@Preview
@Composable
fun NewPollConsensusThresholdPreview() {
    NewPollConsensusThreshold(NewPollViewModel())
}