tether/ios/MacTetherApp/Sources/ContentView.swift

import SwiftUI

struct ContentView: View {
    @Bindable var store: MacTetherStore
    @State private var draft = ""

    var body: some View {
        VStack(spacing: 0) {
            toolbar
            Divider()
            if store.connected && !store.present.isEmpty {
                presenceRow
                Divider()
            }
            if store.connected && !store.nearby.isEmpty {
                nearbyStrip
                Divider()
            }
            if !store.transfers.isEmpty {
                transfersRow
                Divider()
            }
            feedArea
            Divider()
            if !store.receipts.isEmpty {
                seenByBar
                Divider()
            }
            composer
        }
        .frame(minWidth: 480, minHeight: 400)
        .task { store.connectIfSaved() }
    }

    // MARK: - Delivery receipts

    private var seenByBar: some View {
        let names = Array(Set(store.receipts.map(\.name))).sorted()
        return HStack(spacing: 6) {
            Image(systemName: "checkmark.circle.fill")
                .foregroundStyle(.green).font(.caption)
            Text("Seen by \(names.joined(separator: ", "))")
                .font(.caption).foregroundStyle(.secondary).lineLimit(1)
            Spacer()
        }
        .padding(.horizontal, 14).padding(.vertical, 5)
    }

    // MARK: - File transfers (progress)

    private var transfersRow: some View {
        VStack(spacing: 4) {
            ForEach(store.transfers, id: \.name) { t in
                let frac = t.total > 0 ? Double(t.received) / Double(t.total) : 0
                HStack(spacing: 8) {
                    Image(systemName: t.incoming ? "arrow.down.circle" : "arrow.up.circle")
                        .foregroundStyle(.secondary)
                    Text(t.name).font(.caption).lineLimit(1).frame(maxWidth: 140, alignment: .leading)
                    ProgressView(value: frac).frame(width: 120)
                    Text(t.done ? "done" : "\(Int(frac * 100))%")
                        .font(.caption2).foregroundStyle(.secondary)
                    Spacer()
                }
            }
        }
        .padding(.horizontal, 14).padding(.vertical, 5)
    }

    // MARK: - Presence ("who's here")

    private var presenceRow: some View {
        HStack(spacing: 12) {
            ForEach(store.present, id: \.id) { peer in
                HStack(spacing: 5) {
                    Circle().fill(.green).frame(width: 7, height: 7)
                    Image(systemName: sourceIcon(peer.source)).font(.caption2)
                    Text(peer.name).font(.caption).foregroundStyle(.secondary).lineLimit(1)
                }
            }
            Spacer()
        }
        .padding(.horizontal, 14).padding(.vertical, 5)
    }

    // MARK: - Nearby devices (AirDrop-style picker)

    private var nearbyStrip: some View {
        ScrollView(.horizontal, showsIndicators: false) {
            HStack(spacing: 8) {
                Label("Nearby", systemImage: "dot.radiowaves.left.and.right")
                    .font(.caption).foregroundStyle(.secondary)
                    .padding(.trailing, 4)
                ForEach(store.nearby, id: \.id) { peer in
                    let here = peer.room == store.room
                    Button {
                        store.pair(with: peer)
                    } label: {
                        HStack(spacing: 6) {
                            Image(systemName: sourceIcon(peer.source))
                            VStack(alignment: .leading, spacing: 1) {
                                Text(peer.name).font(.caption).lineLimit(1)
                                Text(here ? "in your room" : "tap to join")
                                    .font(.caption2)
                                    .foregroundStyle(here ? .green : .secondary)
                            }
                        }
                        .padding(.horizontal, 10).padding(.vertical, 6)
                        .background(Color.primary.opacity(0.06), in: Capsule())
                    }
                    .buttonStyle(.plain)
                    .disabled(here)
                    .help(here ? "Already in this room" : "Join \(peer.name)'s room")
                }
            }
            .padding(.horizontal, 12).padding(.vertical, 6)
        }
    }

    // MARK: - Toolbar

    private var toolbar: some View {
        HStack(spacing: 10) {
            Circle()
                .fill(store.connected ? Color.green : Color.secondary.opacity(0.5))
                .frame(width: 10, height: 10)
                .animation(.easeInOut, value: store.connected)

            if store.connected {
                Text("Room \(store.room)").font(.callout).foregroundStyle(.secondary)
            } else {
                TextField("Server URL", text: $store.serverURL)
                    .textFieldStyle(.roundedBorder)
                    .frame(maxWidth: 240)
            }

            Spacer()

            if let err = store.lastError, store.hasAttemptedConnect {
                Text(err).font(.caption).foregroundStyle(.red)
            }

            Button(store.connected ? "Disconnect" : "Connect") {
                store.connected ? store.disconnect() : store.connect()
            }
            .buttonStyle(.borderedProminent)
            .tint(store.connected ? .secondary : .accentColor)
        }
        .padding(.horizontal, 16)
        .padding(.vertical, 10)
    }

    // MARK: - Feed

    private var feedArea: some View {
        List(store.feed) { msg in
            feedRow(msg)
                .listRowSeparator(.hidden)
                .listRowInsets(EdgeInsets(top: 4, leading: 12, bottom: 4, trailing: 12))
        }
        .listStyle(.plain)
        .overlay {
            if store.feed.isEmpty {
                ContentUnavailableView(
                    "No messages yet",
                    systemImage: "link.circle",
                    description: Text(store.connected
                        ? "Copy anything on a connected device — it'll appear here."
                        : "Connect to your tether server to start syncing.")
                )
            }
        }
    }

    private func feedRow(_ item: FeedItem) -> some View {
        HStack(alignment: .top, spacing: 10) {
            VStack(alignment: .leading, spacing: 4) {
                if let image = item.image {
                    Image(nsImage: image)
                        .resizable().scaledToFit()
                        .frame(maxWidth: 280, maxHeight: 200)
                        .clipShape(RoundedRectangle(cornerRadius: 6))
                } else if item.isFile {
                    Label(item.text, systemImage: "doc.fill")
                        .font(.body).lineLimit(1)
                } else {
                    Text(item.text)
                        .font(.body).lineLimit(6).textSelection(.enabled)
                }
                HStack {
                    Label(item.isFile ? "file" : item.source,
                          systemImage: item.isFile ? "arrow.down.circle" : sourceIcon(item.source))
                        .font(.caption).foregroundStyle(.secondary)
                    Spacer()
                    Text(item.date, style: .time)
                        .font(.caption).foregroundStyle(.secondary)
                }
            }
            Button {
                if let url = item.fileURL {
                    NSWorkspace.shared.activateFileViewerSelecting([url]) // reveal in Finder
                } else {
                    store.copyToPasteboard(item)
                }
            } label: {
                Image(systemName: item.isFile ? "magnifyingglass" : "doc.on.doc")
                    .foregroundStyle(.secondary)
            }
            .buttonStyle(.plain)
            .help(item.isFile ? "Reveal in Finder" : "Copy to clipboard")
        }
        .padding(10)
        .background(Color.primary.opacity(0.04), in: RoundedRectangle(cornerRadius: 8))
    }

    private func sourceIcon(_ source: String) -> String {
        let s = source
        if s.contains("iphone") || s.contains("ios") { return "iphone" }
        if s.contains("ipad") { return "ipad" }
        if s.contains("macos") || s.contains("mac") { return "laptopcomputer" }
        if s.contains("windows") { return "pc" }
        return "desktopcomputer"
    }

    // MARK: - Composer

    private var composer: some View {
        HStack(spacing: 10) {
            Button {
                store.attachFile()
            } label: {
                Image(systemName: "paperclip")
            }
            .buttonStyle(.plain)
            .disabled(!store.connected)
            .help("Send a file or image")

            TextField("Type a message…", text: $draft, axis: .vertical)
                .textFieldStyle(.roundedBorder)
                .lineLimit(1...4)
                .onSubmit {
                    guard !draft.isEmpty else { return }
                    store.send(draft); draft = ""
                }
            Button {
                store.send(draft); draft = ""
            } label: {
                Image(systemName: "paperplane.fill")
            }
            .keyboardShortcut(.return, modifiers: .command)
            .buttonStyle(.borderedProminent)
            .disabled(!store.connected || draft.isEmpty)
        }
        .padding(12)
    }
}