//
//  CameraView.swift
//  XuXuCheck
//
//  Created by henseycai on 2025/6/25.
//

import SwiftUI

struct CameraView: View {
//    @Binding var image: CGImage?
//    @Binding var array3D: [[[Double]]]
    
    @Environment(CameraViewModel.self) private var cameraViewModel
    @Environment(\.dismiss) private var dissmiss

    //https://cloverlaun.tistory.com/77
    //https://stackoverflow.com/questions/59438285/disable-swipe-back-for-a-navigationlink-swiftui/65354662
    @Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>
    
    @State private var showingNaiveSafariViewFullScreenCover = false

    @State var isAnimating = false

    //let grayImage = OpenCVWrapper.toGrayscale(uiImage)
    var body: some View {
        
        ZStack (alignment: .top){

            
            
            
            GeometryReader { geometry in
               

                
                
                if let image = cameraViewModel.currentFrame {
                    
                    let uiImage = UIImage(cgImage: image)
                    let result = OpenCVWrapper.analysisImage(uiImage)

                    let wbArr = result.paperWbValue as! [Double]
    //                let descArr = result.paperTypeDesc as! [Int]
                    
//                    let wbArr = result.paperWbValue as! [Int]

                    
                    if(wbArr[3] == 0){

                        if(cameraViewModel.array3D.count < 16){
                            let _ = cameraViewModel.array3D.append(result.paperAnalResults as! [[Double]])
    //                        let _ = print(cameraViewModel.array3D.count)
                        }else{
         
                            if(cameraViewModel.isDataSent == false){
         
                                let _ = print(cameraViewModel.array3D)

                                //let _ = cameraViewModel.stopSession()

                                
                                let _ = cameraViewModel.addRecord(desc: result.paperTypeDesc as! [Int])
                            }


                            //following line works just bcs Image come continuously ,so following triggered. thanks God~
    //                        if(cameraViewModel.isSuccess == true){
    //                            let _ =  self.presentationMode.wrappedValue.dismiss()
    //
    //                            XuXuWebView(currentUrl: cameraViewModel.recordDetailUrl())
    //                        }
                        
                        }

                        //let _ = print(wbArr)
    //                    let _ = print(descArr)
                    }
                    

                    
                    Image(uiImage: result.srcImg)
                        .resizable()
                        .scaledToFit()
                        .frame(width: geometry.size.width,
                               height: geometry.size.height)
                    //.clipped()
                    /*clipped() This crucial modifier crops any content of the view that extends beyond its defined frame. When combined with .scaledToFill() and .frame(), it effectively "crops" the image to the specified dimensions.*/
                    
                    
                    
                    Image("scanfan").resizable().frame(width: 60,height: 235)
                        .offset(x: isAnimating ? geometry.size.width : -50,y:70)
                        .animation(.easeInOut(duration: 5).repeatForever(autoreverses: false), value: isAnimating)
                        .onAppear{
                            isAnimating.toggle()
                        }
        
                    Text("Scan urinal strip in natural light. Put strip on white paper towel.Ensure strip is completely presented in green box.").foregroundStyle(Color.white)
                        .font(.title2).frame(maxWidth: .infinity, maxHeight:.infinity,alignment: .topLeading)
                        .padding().background(Color.gray)
                        .offset(x:0,y:400)


                } else {
                    
                    
    //                ContentUnavailableView("Camera feed interrupted", systemImage: "xmark.circle.fill")
    //                                        .frame(width: geometry.size.width,
    //                           height: geometry.size.height)
                    
                    
                    
                }
            }
            .padding(.top,20)
            .onChange(of: cameraViewModel.isSuccess){oldState,newState in
                if(oldState == false && newState == true){
                    
                    //https://www.hackingwithswift.com/quick-start/swiftui/how-to-run-some-code-when-state-changes-using-onchange

                    //https://developer.apple.com/documentation/swiftui/view/onchange(of:perform:)
                    
//                    showingNaiveSafariViewFullScreenCover = true
    //                dissmiss()
                    showingNaiveSafariViewFullScreenCover.toggle()
                }
            }
            .onChange(of: cameraViewModel.isNeedPopErr){oldState,newState in
                if(oldState == false && newState == true){
                    showTopToast.toggle()
                }
            }
            .fullScreenCover(isPresented: $showingNaiveSafariViewFullScreenCover) {
                XuXuWebView(currentUrl: cameraViewModel.recordDetailUrl())
            }
            .present(isPresented: self.$showTopToast, type: .toast, position: .top, duration: 6.0, onTap: {

            }, onToastDismiss: {
                dissmiss()
            }) {
                self.createTopToastView()
            }

            
            
            HStack {
                
                Image(systemName: "arrow.backward")
                    .frame(width: 50, height: 50)
                    .foregroundColor(.secondary)
                .strokeStyle(cornerRadius: 15)
                .onTapGesture {
                    dissmiss()
                }
        
                Text("Scanning").font(.headline).frame(maxWidth: .infinity, alignment: .center)
            }.padding(.top,50)
        }
        
//        .navigationBarTitleDisplayMode(.inline)
//        .toolbar{
//            ToolbarItem(placement:.principal){
//
//        
//                Text("Timer").font(.headline)
//            }
//        }
//        
//        .navigationBarItems(
//            leading: Button(action: {
//                dissmiss()
//            }, label: {
//                Image(systemName: "arrow.backward")
//                    .foregroundColor(Color(red: 231/255, green: 200/255, blue: 153/255))
//            }), trailing: Button(action: {
//                // 点击按钮时的操作
//            }, label: {
//                Text("明细")
//                    .foregroundColor(Color(red: 231/255, green: 200/255, blue: 153/255))
//            }))
        
        
    }
    
    
    let topToastColor = Color(hex: "4067CC")
    
    @State var showTopToast = false
    
    func createTopToastView() -> some View {
        VStack {
            Spacer(minLength: 30)
            HStack() {
                Image("AppIcon")
                    .resizable()
                    .aspectRatio(contentMode: ContentMode.fill)
                    .frame(width: 50, height: 50)
                    .cornerRadius(25)

                VStack(alignment: .leading, spacing: 2) {
                    HStack {
                        Text("Error")
                            .font(.system(size: 18))
                            .foregroundColor(.white)
                            .fontWeight(.bold)
                        Spacer()
                        Image(systemName: "info")
                            .font(.system(size: 12))
                            .foregroundColor(.white)
                    }

                    Text("\(cameraViewModel.xuxuError?.message)" + "!")
                        .lineLimit(2)
                        .font(.system(size: 16))
                        .foregroundColor(.white)
                }
            }.padding(15)
        }
        .frame(height: 130)
        .background(self.topToastColor)
    }

}

#Preview {
    CameraView()

//    CameraView(image: .constant(nil),array3D: .constant([]))
}