package com.sw.inbound.ui

import androidx.compose.animation.core.tween
import androidx.compose.animation.fadeIn
import androidx.compose.animation.fadeOut
import androidx.compose.foundation.Image
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.PaddingValues
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Scaffold
import androidx.compose.runtime.Composable
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.setValue
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.res.painterResource
import androidx.navigation.NavHostController
import androidx.navigation.compose.NavHost
import androidx.navigation.compose.composable
import androidx.navigation.compose.currentBackStackEntryAsState
import androidx.navigation.compose.rememberNavController
import com.sw.inbound.GlobalKey
import com.sw.inbound.R
import com.sw.inbound.ui.page.HomeScreen
import com.sw.inbound.ui.page.PurchaseOrderScreen
import com.sw.inbound.ui.weight.GlobalLoading
import com.sw.inbound.utils.SPUtil
import com.sw.inbound.utils.ToastUtils

@Composable
fun AppScreen(
    onBackRequest: () -> Unit
) {
    val navController = rememberNavController()
    val currentBackStackEntry by navController.currentBackStackEntryAsState()
    var canBack by remember { mutableStateOf(false) }

    // 拦截物理返回键
//    BackHandler(
//        onBack = {
//            val currentRoute = currentBackStackEntry?.destination?.route
//            Timber.d("BackHandler currentRouter = ${currentRoute}")
//            if (currentRoute == Screen.Home.route && !canBack) {
//                ToastUtils.showToast("再次点击退出")
//                canBack = true
//            } else if (currentRoute == Screen.Login.route) {
//                onBackRequest()
//            } else {
//                navController.popBackStack()
//            }
//        }
//    )
//
//    BackHandler(canBack) {
//        Timber.d("canBack = $canBack")
//        if (canBack) {
//            onBackRequest()
//        }
//    }

    Scaffold(
        modifier = Modifier
            .fillMaxSize()
            //.paint(painter = painterResource(R.mipmap.bg)),
        ,containerColor = Color.Transparent,
        content = { padding ->
            Box {
//            Image(
//                painter = painterResource(R.mipmap.bg),
//                contentDescription = null,
//                modifier = Modifier.fillMaxSize(),
//                contentScale = ContentScale.Crop
//            )
                Image(
                    painter = painterResource(id = R.mipmap.bg),
                    contentDescription = "背景图片",
                    modifier = Modifier.fillMaxSize(),
                    contentScale = ContentScale.Crop
                )
                NavHost(padding, navController, onBackRequest)
            }
        }
    )
    ToastUtils.ToastComposable()
    GlobalLoading() // 全局Loading

}

/**
 * 导航
 */
@Composable
private fun NavHost(
    padding: PaddingValues,
    navController: NavHostController,
    onBackRequest: () -> Unit = {}
) {
    val spUtil = SPUtil.getInstance()
    val token = spUtil.get(GlobalKey.KEY_TOKEN, "")!!
    NavHost(
        modifier = Modifier
            .fillMaxSize()
            .padding(padding),
        navController = navController,
        //startDestination = if (token.isEmpty()) Screen.Login.route else Screen.Home.route
        startDestination = Screen.Home.route
    ) {
//        composable(Screen.Test.route) {
//            TestScreen(modifier = Modifier, navController)
//        }
        // 首页
        composable(Screen.Home.route) {
            HomeScreen(modifier = Modifier, navController, onBackRequest = onBackRequest)
        }
        // 登录
//        composable(Screen.Login.route) {
//            LoginScreen(modifier = Modifier, navController)
//        }
        // 采购单入库
        composable(
            Screen.PurchaseOrder.route,
            enterTransition = { fadeIn(animationSpec = tween(0)) }, // 无进入动画
            exitTransition = { fadeOut(animationSpec = tween(0)) }  // 无退出动画
        ) {
            PurchaseOrderScreen(modifier = Modifier.fillMaxSize(), navController)
        }
//        // 自采单
//        composable(
//            Screen.SelfProcurement.route,
//            enterTransition = { fadeIn(animationSpec = tween(0)) }, // 无进入动画
//            exitTransition = { fadeOut(animationSpec = tween(0)) }  // 无退出动画
//        ) {
//            SelfProcurementScreen(modifier = Modifier, navController)
//        }
//        // 收货
//        composable(
//            Screen.ReceiptProduct.route,
//            enterTransition = { fadeIn(animationSpec = tween(0)) }, // 无进入动画
//            exitTransition = { fadeOut(animationSpec = tween(0)) },  // 无退出动画
//            arguments = listOf(
//                navArgument(name = "id", builder = { type = NavType.IntType }),
//                navArgument(name = "supplierId", builder = { type = NavType.IntType })
//            )
//        ) { backStackEntry ->
//            val id = backStackEntry.arguments?.getString("id") ?: ""
//            val supplierId = backStackEntry.arguments?.getString("supplierId") ?: ""
//            ReceiptProductScreen(modifier = Modifier, navController, id, supplierId)
//        }
    }
}

sealed class Screen(val route: String) {
    data object Home : Screen("home")
//    data object Login : Screen("login")

    // 采购单入库
    data object PurchaseOrder : Screen("purchase_order")

    // 自采单入库
//    data object SelfProcurement : Screen("self_procurement")

    // 收货
//    data object ReceiptProduct : Screen("receipt_product?id={id}&supplierId={supplierId}") {
//        fun createRoute(id: Int, supplierId: Int) =
//            "receipt_product?id=${id}&supplierId=${supplierId}"
//    }

    // 添加物品
//    data object AddProduct : Screen("addProduct")
//    data object Test : Screen("Test")
}