package com.example.smarthome

import android.graphics.drawable.Drawable
import android.os.Bundle
import androidx.activity.ComponentActivity
import com.example.smarthome.ui.theme.SmartHomeTheme
import androidx.compose.runtime.Composable
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.platform.ViewCompositionStrategy
import androidx.compose.material3.Surface
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.ui.Modifier
import androidx.core.view.WindowCompat
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.foundation.layout.Box
import androidx.compose.ui.unit.dp
import com.example.smarthome.ui.MainScaffold
import com.example.smarthome.ui.LoginScreen
import androidx.compose.ui.platform.ComposeView
import androidx.compose.foundation.Image
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.layout.ContentScale
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.systemBarsPadding
import androidx.compose.runtime.collectAsState
import com.example.smarthome.data.BackgroundManager
import com.example.smarthome.data.LanguageManager
import com.example.smarthome.data.UserManager
import com.example.smarthome.ui.SmartHomeScreen

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        
        // 初始化语言管理器
        LanguageManager.init(this)
        // 初始化用户管理器
        UserManager.init(this)
        
        // 隐藏状态栏和导航栏
        hideStatusBar()

        setContentView(R.layout.activity_main)
        val composeView = findViewById<ComposeView>(R.id.composeView)
        composeView.setViewCompositionStrategy(ViewCompositionStrategy.DisposeOnViewTreeLifecycleDestroyed)
        composeView.setContent {
            SmartHomeTheme {
                AppRoot()
            }
        }

    }
    private fun hideStatusBar() {
        // 设置全屏模式，让内容延伸到系统栏区域
        WindowCompat.setDecorFitsSystemWindows(window, false)
        
        // 设置全屏标志
        window.setFlags(
            android.view.WindowManager.LayoutParams.FLAG_FULLSCREEN,
            android.view.WindowManager.LayoutParams.FLAG_FULLSCREEN
        )
        
        // 设置状态栏和导航栏为透明
        window.statusBarColor = android.graphics.Color.TRANSPARENT
        window.navigationBarColor = android.graphics.Color.TRANSPARENT
        
        // 隐藏状态栏和导航栏
        window.decorView.systemUiVisibility = (
            android.view.View.SYSTEM_UI_FLAG_FULLSCREEN
            or android.view.View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
            or android.view.View.SYSTEM_UI_FLAG_LAYOUT_STABLE
            or android.view.View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
            or android.view.View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
            or android.view.View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
        )
        
        // 支持刘海屏设备
        val lp = window.attributes
        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.P) {
            lp.layoutInDisplayCutoutMode = android.view.WindowManager.LayoutParams.LAYOUT_IN_DISPLAY_CUTOUT_MODE_SHORT_EDGES
        }
        window.attributes = lp
    }
}

@Composable
fun AppRoot() {
    val context = androidx.compose.ui.platform.LocalContext.current
    
    // 监听登录状态
    val isLoggedIn by UserManager.isLoggedIn.collectAsState()
    
    if (!isLoggedIn) {
        // 未登录，显示登录页面
        LoginScreen(
            onLoginSuccess = {
                // 登录成功后会自动更新isLoggedIn状态
            }
        )
    } else {
        // 已登录，显示主界面
        MainContent()
    }
}

@Composable
fun MainContent() {
    val context = androidx.compose.ui.platform.LocalContext.current
    val sharedPreferences = remember { 
        context.getSharedPreferences("smart_home_prefs", android.content.Context.MODE_PRIVATE) 
    }
    
    // 从SharedPreferences加载房间列表
    val defaultRooms = listOf("总览", "客厅", "厨房", "卧室", "影音室", "游戏房")
    val savedRooms = remember {
        val saved = sharedPreferences.getString("rooms", null)
        if (saved != null) {
            saved.split(",").filter { it.isNotBlank() }
        } else {
            defaultRooms
        }
    }
    
    var selectedRoom by remember { mutableStateOf(0) }
    var selectedNavItem by remember { mutableStateOf(0) }
    var rooms by remember { mutableStateOf(savedRooms) }
    
    // 保存房间列表到SharedPreferences
    fun saveRooms(roomList: List<String>) {
        sharedPreferences.edit().putString("rooms", roomList.joinToString(",")).apply()
        rooms = roomList
    }
    
    // 初始化背景管理器并获取当前选中的背景
    androidx.compose.runtime.LaunchedEffect(Unit) {
        BackgroundManager.init(context)
    }
    val selectedBgId by BackgroundManager.selectedBackground.collectAsState()
    val currentBg = BackgroundManager.backgrounds.getOrNull(selectedBgId)
    val backgroundRes = currentBg?.resourceId ?: R.drawable.background1
    // 根据背景类型调整遮罩透明度：暗色背景减少遮罩，亮色背景增加遮罩
    val overlayAlpha = if (currentBg?.isDark == true) 0x11 else 0x88
    
    Box(modifier = Modifier.fillMaxSize()) {
        // 背景图片 - 填充整个屏幕包括系统栏，使用FillBounds确保完全填充
        Image(
            painter = painterResource(id = backgroundRes),
            contentDescription = null,
            modifier = Modifier.fillMaxSize(),
            contentScale = ContentScale.FillBounds,
            alpha = 0.8f
        )
        
        // 半透明遮罩层 - 填充整个屏幕包括系统栏
        Box(
            modifier = Modifier
                .fillMaxSize()
                .background(Color(overlayAlpha shl 24 or 0x121212))
        )
        
        // 主内容 - 全屏显示
        Box(modifier = Modifier.fillMaxSize()) {
            MainScaffold(
                selectedRoom = selectedRoom,
                onRoomSelect = { roomIndex ->
                    selectedRoom = roomIndex
                    selectedNavItem = 0 // 切换到控制台页面
                },
                selectedNavItem = selectedNavItem,
                onNavItemSelect = { selectedNavItem = it },
                rooms = rooms,
                onAddRoom = { newRoomName ->
                    saveRooms(rooms + newRoomName)
                },
                onDeleteRoom = { index ->
                    if (rooms.size > 1) { // 至少保留一个房间
                        saveRooms(rooms.filterIndexed { i, _ -> i != index })
                        if (selectedRoom >= rooms.size - 1) {
                            selectedRoom = (rooms.size - 2).coerceAtLeast(0)
                        }
                    }
                },
                onRenameRoom = { index, newName ->
                    saveRooms(rooms.mapIndexed { i, name -> if (i == index) newName else name })
                }
            )
        }
    }
}