//
//  CompanyGalleryORView.swift
//  IOS_study
//
//  Created by CC-star on 2025/7/22.
//

import SwiftUI
import Kingfisher

struct CompanyGalleryORView: View {
   let imageURLStrs: [String]
   @Environment(\.dismiss) var dismiss
   @State var currentPage: Int
   @State var dragOffset: CGSize = .zero
   var body: some View {
      TabView(selection: $currentPage) {
         ForEach(imageURLStrs.indices, id: \.self) { i in
           VStack {
               KFImage(URL(string: imageURLStrs[i]))
                  .placeholder { ProgressView() }.loadDiskFileSynchronously().fade(duration: 0.15)
                  .resizable().scaledToFit().tag(i)
                  .offset(y: dragOffset.height)
           }.frame(maxWidth: .infinity, maxHeight: .infinity).pinchToZoom()
         }
      }.bg().tabViewStyle(.page)
         .toolbarVisibility(.hidden, for: .tabBar)
         .toolbar {
            ToolbarItem(placement: .principal) {
               Text("\(currentPage + 1)/\(imageURLStrs.count)").tc().bold()
            }
         }
         .gesture(//手势【拖拽】
            DragGesture()
               .onChanged({ gesture in
                  if gesture.translation.height > 0 {
                     dragOffset = gesture.translation
                  }
               })
               .onEnded { gesture in
                  if gesture.translation.height > 80 {//垂直偏移80 -> 返回上一页
                     dismiss()
                  } else {
                     withAnimation { dragOffset = .zero }
                  }
               }
         )
   }
}