//
//  ServerDetailView.swift
//  iKeyMon
//
//  Created by tracer on 30.03.25.
//

import SwiftUI

struct ServerDetailView: View {
    @Binding var server: Server
    var isFetching: Bool
    @AppStorage("showIntervalIndicator") private var showIntervalIndicator: Bool = true
    
    private var showPlaceholder: Bool {
        server.info == nil
    }
    
    @State private var progress: Double = 0
    let timer = Timer.publish(every: 1.0 / 60.0, on: .main, in: .common).autoconnect()
    
    var body: some View {
        VStack(spacing: 0) {
            if showIntervalIndicator {
                ProgressView(value: progress)
                    .progressViewStyle(LinearProgressViewStyle())
                    .padding(.horizontal)
                    .frame(height: 2)
            }
            
            ZStack(alignment: .topTrailing) {
                VStack(spacing: 0) {
                    Spacer().frame(height: 6)
                    TabView {
                        GeneralView(server: resolvedBinding)
                            .tabItem {
                                Text("General").unredacted()
                            }
                        ResourcesView(server: resolvedBinding)
                            .tabItem {
                                Text("Resources").unredacted()
                            }
                        ServicesView(server: resolvedBinding)
                            .tabItem {
                                Text("Services").unredacted()
                            }
                    }
                    .redacted(reason: showPlaceholder ? .placeholder : [])
                    .shimmering(active: showPlaceholder)
                }
                
                if showPlaceholder || isFetching {
                    LoadingBadge()
                        .padding()
                }
            }
            .padding(0)
        }
        .onReceive(timer) { _ in
            guard showIntervalIndicator else { return }
            withAnimation(.linear(duration: 1.0 / 60.0)) {
                progress += 1.0 / (60.0 * 60.0)
                if progress >= 1 { progress = 0 }
            }
        }
    }
    
    private var resolvedBinding: Binding<Server> {
        if showPlaceholder {
            return .constant(placeholderServer())
        }
        return $server
    }
    
    private func placeholderServer() -> Server {
        Server(id: server.id, hostname: server.hostname, info: .placeholder, pingable: server.pingable)
    }
}

#Preview {
    ServerDetailView(
        server: .constant(Server(id: UUID(), hostname: "preview.example.com", info: ServerInfo.placeholder)),
        isFetching: false
    )
}

private struct LoadingBadge: View {
    var body: some View {
        HStack(spacing: 6) {
            ProgressView()
                .scaleEffect(0.5)
            Text("Fetching latest data…")
                .font(.caption)
        }
        .padding(8)
        .background(.ultraThinMaterial, in: Capsule())
    }
}