//
//  GrammarCheckView.swift
//  AIGrammar
//
//  Created by oscar on 2024/3/27.
//

import SwiftUI
import ToastUI
import FirebaseAnalytics

fileprivate struct BuyProView: View {
    var onTryForFree: () -> Void
    
    var body: some View {
        HStack {
            VStack(alignment: .leading, spacing: 10) {
                Text("Update to Pro")
                    .font(.headline)
                
                Text("Remove Character limits and ads. Use Grammar Check with higher quality.")
                    .font(.subheadline)
            }
            
            Spacer()
            
            Button("Try for free") {
                // 按钮动作
                // 触发显示VIP付费界面的事件
                onTryForFree()
                
                // 记录事件
                Analytics.logEvent(globalAnalyticsEvents.eventEnterPurchase, parameters: [
                    globalAnalyticsEvents.keyPurchaseEntry: globalAnalyticsEvents.valEntryBuyProBtn as NSObject,
                    globalAnalyticsEvents.keyDeviceID: globalEnvironment.deviceID as NSObject
                ])
            }
            .padding(.vertical, 6) // 调整高度为默认高度的2/3
            .padding(.horizontal, 20)
            .background(Color.green)
            .foregroundColor(.white)
            .cornerRadius(5)
            .font(.headline) // 调整字体大小为标题大小
            .alignmentGuide(.bottom) { d in d[.bottom] } // 对齐按钮的底部到 VStack 的底部
        }
        .padding()
        .background(Color.white)
        .cornerRadius(5)
        .padding(5)
    }
}

enum ActiveSheet {
    case camera, share
}
extension ActiveSheet: Identifiable {
    var id: Self { self }
}


struct GrammarCheckView: View {
    @EnvironmentObject var globalEnv: GlobalEnvironment  // 引入环境对象
    
    // 定义变量
    @State private var textInput: String
    @State private var inputResult : String
    @State private var progressValue: Float = 0
    @State private var showKeyboard: Bool = false
    @State private var showBuyProView: Bool = true
    @State private var showResult : Bool = false
    @State var results : [GrammarRes]
    @State private var showVIPPaymentView: Bool = false  // 控制VIP付费界面的显示
    
    // 提交等待，错误提示等
    @State private var isLoading = false  // 控制加载指示器的显示
    @State private var showingToast = false  // 控制是否显示toast
    @State private var toastText = ""
    
    @State private var activeSheet: ActiveSheet?

    @State private var isTextEditorFocused: Bool = false  // 这个变量会传递给 InputView

    // 使用默认文本进行初始化
    init() {
        let demoGrammarData = GrammarData.demoInstance()
        self.textInput = demoGrammarData.inputText
        self.inputResult = demoGrammarData.correctText
        self.results = demoGrammarData.results
    }
    
    
    var body: some View {
        NavigationView {
            ZStack {
                Color.pink.opacity(0.2).edgesIgnoringSafeArea(.all) // 设置页面背景色
                
                VStack {
                    if showResult {
                        ResultView(textContent: $textInput, results: $results, showResult: $showResult, showKeyboard: $showKeyboard)
                    } else {
                        InputView(textInput: $textInput, progressValue: $progressValue, showKeyboard: $showKeyboard, showBuyProView: $showBuyProView, showResult: $showResult, results: $results, isLoading: $isLoading, showingToast: $showingToast, toastText: $toastText)
                            // .environment(\.isTextEditorFocused, $isTextEditorFocused)  // 将焦点状态传递给 InputView 
                    }
                    if showBuyProView {
                        BuyProView(onTryForFree: {
                            showVIPPaymentView = true  // 显示VIP付费界面
                        })
                        //BuyProView()
                    }
                }
                .fullScreenCover(isPresented: $showVIPPaymentView) {
                    VIPPaymentView()  // 弹出VIP付费界面
                }
                .navigationBarTitleDisplayMode(.inline)
                .toolbar {
                    ToolbarItem(placement: .principal) {
                        HStack {
                            Text("Grammar & Spell Checker")
                                .font(.headline)  // 设置标题字体
                            if globalEnv.isVip {
                                Image("vipimg") // 示例中使用系统图标
                                    .resizable()  // 使图片可调整大小
                                    .scaledToFit() // 保持图片的宽高比
                                    .frame(width: 24, height: 24) // 设置图标的具体尺寸
                                    .foregroundColor(.yellow)
                                    .font(.subheadline) // 设置图标字体为比标题小
                                    .offset(y: -1) // 根据需要调整图标的垂直位置
                            }
                        }
                    }
                }
                .foregroundColor(.black)
                .navigationBarItems(leading: Button(action: {
                    // 相机按钮动作
                    self.activeSheet = .camera
                }) {    
                    Image(systemName: "camera")
                }, trailing: Button(action: {
                    // 分享按钮动作
                    self.activeSheet = .share
                }) {
                    Image(systemName: "square.and.arrow.up")
                })
                .sheet(item: $activeSheet, onDismiss: {
                    // 如果需要在sheet关闭时执行某些操作，可以在这里添加
                }) { item in
                    switch item {
                    case .camera:
                        CameraView(textInput: $textInput)
                    case .share:
                        ShareSheet(itemsToShare: [textInput])
                    }
                }
                .toast(isPresented: $showingToast, dismissAfter: globalEnvironment.toastPresentMsNormal) {
                    HStack {
                        Image(systemName: "exclamationmark.bubble")
                            .foregroundColor(.yellow)
                        Text(toastText)
                            .foregroundColor(.black)
                    }
                    .padding()
                    .background(Color.white)
                    .cornerRadius(8)
                    .shadow(radius: 10)
                }
                
                // 加载指示器
                if isLoading {
                    LoadingView()
                }
            }
            
        }
    }
    
}


// MARK: 预览
struct GrammarCheckView_Previews: PreviewProvider {
    static var previews: some View {
        GrammarCheckView()
            .environmentObject(IAPManager()) // 这里添加 IAPManager
            .environmentObject(globalEnvironment) // 这里添加 IAPManager
    }
}