package agzam.vyatsu.ui.home

import agzam.vyatsu.ui.info.BuildingsScreen
import agzam.vyatsu.ui.info.CallsScreen
import agzam.vyatsu.ui.schedule.ScheduleScreen
import agzam.vyatsu.ui.schedule.ScheduleViewModel
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.DateRange
import androidx.compose.material.icons.filled.Home
import androidx.compose.material.icons.filled.Info
import androidx.compose.material3.Icon
import androidx.compose.material3.NavigationBar
import androidx.compose.material3.NavigationBarItem
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
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

private enum class HomeTab(val label: String) {
    SCHEDULE("Расписание"),
    CALLS("Звонки"),
    BUILDINGS("Корпуса")
}

@Composable
fun HomeScreen(
    scheduleViewModel: ScheduleViewModel,
    onSwitchGroup: () -> Unit
) {
    var tab by rememberSaveable { mutableStateOf(HomeTab.SCHEDULE) }

    Scaffold(
        bottomBar = {
            NavigationBar {
                HomeTab.entries.forEach { t ->
                    NavigationBarItem(
                        selected = tab == t,
                        onClick = { tab = t },
                        icon = {
                            Icon(
                                imageVector = when (t) {
                                    HomeTab.SCHEDULE -> Icons.Default.DateRange
                                    HomeTab.CALLS -> Icons.Default.Info
                                    HomeTab.BUILDINGS -> Icons.Default.Home
                                },
                                contentDescription = t.label
                            )
                        },
                        label = { Text(t.label) }
                    )
                }
            }
        }
    ) { innerPadding ->
        androidx.compose.foundation.layout.Box(
            Modifier
                .fillMaxSize()
                .padding(innerPadding)
        ) {
            when (tab) {
                HomeTab.SCHEDULE -> ScheduleScreen(viewModel = scheduleViewModel, onSwitchGroup = onSwitchGroup)
                HomeTab.CALLS -> CallsScreen()
                HomeTab.BUILDINGS -> BuildingsScreen()
            }
        }
    }
}