package com.scarriffle.calendarr.ui

import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.material3.MaterialTheme
import androidx.compose.material3.Surface
import androidx.compose.runtime.Composable
import androidx.compose.runtime.CompositionLocalProvider
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.getValue
import androidx.compose.ui.Modifier
import androidx.hilt.navigation.compose.hiltViewModel
import com.scarriffle.calendarr.ui.auth.LoginScreen
import com.scarriffle.calendarr.ui.auth.ServerSetupScreen
import com.scarriffle.calendarr.ui.calendar.CalendarScreen
import com.scarriffle.calendarr.ui.theme.CalendarrTheme

@Composable
fun CalendarrRoot(vm: MainViewModel = hiltViewModel()) {
    val route by vm.route.collectAsState()
    val settings by vm.settings.collectAsState()

    CalendarrTheme(settings) {
        CompositionLocalProvider(
            LocalLang provides L10n.resolved(settings.language),
            LocalAppSettings provides settings,
        ) {
            // The system splash (installSplashScreen) covers startup until the
            // first events are loaded, so there's no in-app splash here.
            Surface(modifier = Modifier.fillMaxSize(), color = MaterialTheme.colorScheme.background) {
                when (route) {
                    AppRoute.SETUP -> ServerSetupScreen(onConfigured = vm::onServerConfigured)
                    AppRoute.LOGIN -> LoginScreen(
                        serverUrl = vm.serverUrl,
                        onLoggedIn = vm::onLoggedIn,
                        onBack = vm::switchServer,
                    )
                    AppRoute.MAIN -> CalendarScreen(
                        onLogout = vm::logout,
                        onSwitchServer = vm::switchServer,
                        onSettingsChanged = vm::applyLocalSettings,
                        onSettingsSynced = vm::refreshSettings,
                    )
                }
            }
        }
    }
}