import SwiftUI

struct MenuBarView: View {
    @ObservedObject var controller: DaemonController
    @ObservedObject var preferences: AppPreferences
    @Environment(\.openWindow) private var openWindow

    var body: some View {
        VStack(spacing: 0) {
            header.padding(.horizontal,14).padding(.top,14).padding(.bottom,10)
            Divider()
            statusGrid.padding(.horizontal,14).padding(.vertical,10)
            Divider()
            if !controller.connectedClients.isEmpty {
                connectionsSection.padding(.horizontal,14).padding(.vertical,8)
                Divider()
            }
            actionsSection.padding(.horizontal,14).padding(.vertical,8)
            Divider()
            footer.padding(.horizontal,14).padding(.vertical,8)
        }
        .frame(width: 300)
    }

    private var header: some View {
        HStack(spacing:10) {
            Circle().fill(stateColor).frame(width:10,height:10).shadow(color:stateColor.opacity(0.6),radius:4)
            VStack(alignment:.leading,spacing:2) {
                Text("PadXcode Daemon").font(.headline)
                Text(controller.serverState.statusLabel).font(.subheadline).foregroundStyle(.secondary)
            }
            Spacer()
            Button {
                Task {
                    if controller.serverState.isRunning { await controller.stop() }
                    else if case .starting = controller.serverState { } // ignore during startup
                    else { await controller.start() }
                }
            }
            label: {
                if case .starting = controller.serverState {
                    ProgressView().scaleEffect(0.6).frame(width:44)
                } else {
                    Text(controller.serverState.isRunning ? "Stop" : "Start").frame(width:44)
                }
            }
            .buttonStyle(.bordered).controlSize(.small)
            .tint(controller.serverState.isRunning ? .red : .green)
            .disabled({ if case .starting = controller.serverState { return true }; return false }())
        }
    }

    private var statusGrid: some View {
        Grid(alignment:.leading,horizontalSpacing:12,verticalSpacing:6) {
            GridRow {
                StatusCell(label:"Port",    value:"\(preferences.port)",         icon:"antenna.radiowaves.left.and.right")
                StatusCell(label:"Uptime",  value:controller.serverState.uptime ?? "—", icon:"clock")
            }
            GridRow {
                StatusCell(label:"Tailscale", value:preferences.tailscaleIP,    icon:"network")
                StatusCell(label:"Builds",    value:"\(controller.buildCount)",  icon:"hammer")
            }
            GridRow {
                StatusCell(label:"Clients", value:"\(controller.connectedClients.count)", icon:"ipad.and.iphone")
                StatusCell(label:"Config",  value:preferences.developmentTeam.isEmpty ? "⚠️ No Team ID" : "✓ Signed", icon:"checkmark.seal")
            }
        }
    }

    private var connectionsSection: some View {
        VStack(alignment:.leading,spacing:4) {
            Text("Active Connections").font(.caption.bold()).foregroundStyle(.secondary)
            ForEach(controller.connectedClients) { c in
                HStack(spacing:6) {
                    Circle().fill(.green).frame(width:6,height:6)
                    Text(c.type.rawValue).font(.caption)
                    Spacer()
                    Text(c.sessionId.prefix(8)).font(.system(.caption2,design:.monospaced)).foregroundStyle(.secondary)
                }
            }
        }
    }

    private var actionsSection: some View {
        VStack(spacing:2) {
            MenuAction(label:"Restart Server",   icon:"arrow.clockwise")      { Task { await controller.restart() } }
            MenuAction(label:"View Log",         icon:"doc.text.magnifyingglass") { openWindow(id:"log"); NSApp.activate(ignoringOtherApps:true) }
            MenuAction(label:"Copy Server URL",  icon:"doc.on.clipboard")     {
                let url = "http://\(preferences.tailscaleIP):\(preferences.port)"
                NSPasteboard.general.clearContents(); NSPasteboard.general.setString(url, forType:.string)
            }
            MenuAction(label:"Open Config Folder", icon:"folder") {
                NSWorkspace.shared.open(URL(fileURLWithPath:NSHomeDirectory()).appendingPathComponent(".padxcode"))
            }
            MenuAction(label:"Settings…", icon:"gearshape", shortcut:",") { openSettingsWindow() }
        }
    }

    private var footer: some View {
        HStack {
            Text("v1.0.0").font(.caption2).foregroundStyle(.tertiary)
            Spacer()
            Button("Quit PadXcode Daemon") { Task { await controller.stop(); NSApp.terminate(nil) } }
            .buttonStyle(.plain).font(.caption).foregroundStyle(.secondary)
        }
    }

    private var stateColor: Color {
        switch controller.serverState {
        case .running: return .green; case .starting: return .yellow
        case .error: return .red; case .stopped: return .secondary
        }
    }

    private func openSettingsWindow() {
        openWindow(id:"settings")
        DispatchQueue.main.asyncAfter(deadline:.now()+0.05) {
            NSApp.setActivationPolicy(.regular); NSApp.activate(ignoringOtherApps:true)
            NSApp.windows.first(where:{ $0.title == "PadXcode Daemon Settings" })?.makeKeyAndOrderFront(nil)
        }
    }
}

struct StatusCell: View {
    let label: String; let value: String; let icon: String
    var body: some View {
        HStack(spacing:5) {
            Image(systemName:icon).font(.caption).foregroundStyle(.secondary).frame(width:14)
            VStack(alignment:.leading,spacing:0) {
                Text(label).font(.caption2).foregroundStyle(.tertiary)
                Text(value).font(.system(.caption,design:.monospaced)).lineLimit(1)
            }
        }.frame(maxWidth:.infinity,alignment:.leading)
    }
}

struct MenuAction: View {
    let label: String; let icon: String; var shortcut: String? = nil; let action: () -> Void
    var body: some View {
        Button(action:action) {
            HStack {
                Image(systemName:icon).frame(width:16).foregroundStyle(.secondary)
                Text(label)
                Spacer()
                if let sc = shortcut { Text("⌘\(sc)").font(.caption).foregroundStyle(.tertiary) }
            }.contentShape(Rectangle()).padding(.horizontal,4).padding(.vertical,5)
        }.buttonStyle(.plain)
    }
}

struct MenuBarIcon: View {
    let controller: DaemonController?
    var body: some View {
        HStack(spacing:3) {
            Image(systemName: iconName).symbolRenderingMode(.palette).foregroundStyle(iconColor, .primary)
            if let u = controller?.serverState.uptime { Text(u).font(.system(size:10,design:.monospaced)) }
        }
    }
    private var iconName: String {
        switch controller?.serverState {
        case .running: return "dot.radiowaves.left.and.right"; case .starting: return "arrow.clockwise.circle"
        case .error: return "exclamationmark.circle"; default: return "antenna.radiowaves.left.and.right.slash"
        }
    }
    private var iconColor: Color {
        switch controller?.serverState {
        case .running: return .green; case .starting: return .yellow; case .error: return .red; default: return .secondary
        }
    }
}