package com.example.scanwich

import android.content.SharedPreferences
import android.widget.Toast
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.rememberScrollState
import androidx.compose.foundation.verticalScroll
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Edit
import androidx.compose.material3.*
import androidx.compose.runtime.*
import androidx.compose.ui.Modifier
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.unit.dp
import androidx.core.content.edit

@Composable
fun SettingsScreen(prefs: SharedPreferences, onLogout: () -> Unit, onProfileUpdated: () -> Unit) {
    var isEditing by remember { mutableStateOf(false) }
    val context = LocalContext.current
    
    // État réactif pour la connexion Strava
    var isStravaConnected by remember { mutableStateOf(prefs.contains("strava_token")) }

    // Écouteur pour mettre à jour l'état si le token change
    DisposableEffect(prefs) {
        val listener = SharedPreferences.OnSharedPreferenceChangeListener { p, key ->
            if (key == "strava_token") {
                isStravaConnected = p.contains("strava_token")
            }
        }
        prefs.registerOnSharedPreferenceChangeListener(listener)
        onDispose {
            prefs.unregisterOnSharedPreferenceChangeListener(listener)
        }
    }

    if (isEditing) { 
        SetupScreen(prefs) { 
            isEditing = false
            onProfileUpdated()
        } 
    } else {
        val targetCals = prefs.getString("target_calories", "0")
        Column(modifier = Modifier.fillMaxSize().padding(16.dp).verticalScroll(rememberScrollState())) {
            Text("Mon Profil", style = MaterialTheme.typography.headlineMedium)
            Spacer(Modifier.height(16.dp))
            Card(modifier = Modifier.fillMaxWidth()) {
                Column(modifier = Modifier.padding(16.dp)) {
                    ProfileItem("Objectif", prefs.getString("goal", "") ?: "")
                    ProfileItem("Cible Calorique", "$targetCals kcal")
                    ProfileItem("Diabétique", if (prefs.getBoolean("is_diabetic", false)) "Oui" else "Non")
                }
            }
            Spacer(Modifier.height(8.dp))
            Button(onClick = { isEditing = true }, modifier = Modifier.fillMaxWidth()) { Icon(Icons.Default.Edit, null); Text(" Modifier le profil") }
            
            Spacer(Modifier.height(32.dp))
            Text("Intégrations", style = MaterialTheme.typography.titleMedium)
            Spacer(Modifier.height(8.dp))
            
            if (isStravaConnected) {
                OutlinedButton(
                    onClick = { 
                        prefs.edit { 
                            remove("strava_token")
                            remove("strava_refresh_token")
                        }
                        // L'écouteur mettra `isStravaConnected` à jour automatiquement
                        Toast.makeText(context, "Strava déconnecté", Toast.LENGTH_SHORT).show()
                    },
                    modifier = Modifier.fillMaxWidth()
                ) {
                    Text("Déconnecter Strava (Connecté)")
                }
            } else {
                 Text("Aucune intégration active. Allez dans l'onglet 'Sport' pour connecter Strava.", style = MaterialTheme.typography.bodyMedium)
            }

            Spacer(Modifier.height(32.dp))
            Button(onClick = onLogout, colors = ButtonDefaults.buttonColors(containerColor = MaterialTheme.colorScheme.error), modifier = Modifier.fillMaxWidth()) { Text("Déconnexion") }
        }
    }
}

@Composable
fun ProfileItem(label: String, value: String) {
    Row(modifier = Modifier.fillMaxWidth().padding(vertical = 4.dp), horizontalArrangement = Arrangement.SpaceBetween) {
        Text(label, fontWeight = FontWeight.Bold); Text(value)
    }
}