import SwiftUI

struct MonitorMenuView: View {
    @ObservedObject var monitor: ServerMonitor
    @Environment(\.openWindow) private var openWindow

    var body: some View {
        VStack(alignment: .leading, spacing: 0) {
            HStack {
                VStack(alignment: .leading, spacing: 5) {
                    Label("PEGASUS MONITOR", systemImage: "server.rack").font(.headline)
                    Label(monitor.status.title, systemImage: monitor.status.symbol)
                        .foregroundStyle(monitor.status.color)
                }
                Spacer()
                if monitor.offlineCount > 0 {
                    Text("\(monitor.offlineCount) offline").foregroundStyle(.red).font(.caption.bold())
                }
            }.padding(14)
            Divider()
            Text("SERVERS").font(.caption.bold()).foregroundStyle(.secondary).padding(.horizontal, 14).padding(.top, 12)
            ScrollView {
                LazyVStack(spacing: 2) {
                    ForEach(monitor.servers) { server in
                        Button {
                            monitor.select(server.id)
                        } label: {
                            HStack {
                                Image(systemName: monitor.results[server.id]?.status.symbol ?? "circle.dotted")
                                    .foregroundStyle(server.enabled ? (monitor.results[server.id]?.status.color ?? .secondary) : .gray)
                                VStack(alignment: .leading, spacing: 2) {
                                    Text(server.name).fontWeight(server.id == monitor.selectedID ? .bold : .regular)
                                    Text(server.host).font(.caption2).foregroundStyle(.secondary)
                                }
                                Spacer()
                                if monitor.results[server.id]?.refreshing == true { ProgressView().controlSize(.mini) }
                                else if let report = monitor.results[server.id]?.report {
                                    Text("\(report.counts.ok) OK").font(.caption2).foregroundStyle(.secondary)
                                }
                                if server.id == monitor.selectedID { Image(systemName: "checkmark") }
                            }.padding(.horizontal, 14).padding(.vertical, 8)
                                .contentShape(Rectangle())
                        }.buttonStyle(.plain)
                    }
                }
            }.frame(maxHeight: 175)
            Divider()
            if let selected = monitor.selected {
                HStack {
                    Text(selected.name.uppercased()).font(.caption.bold())
                    Spacer()
                    Button { Task { await monitor.refreshSelected() } } label: { Image(systemName: "arrow.clockwise") }
                        .buttonStyle(.plain)
                }.padding(.horizontal, 14).padding(.vertical, 10)
                ScrollView {
                    LazyVStack(alignment: .leading, spacing: 0) {
                        if let report = monitor.report {
                            if !monitor.selectedServices.isEmpty {
                                Text("SERVICES")
                                    .font(.caption.bold()).foregroundStyle(.secondary)
                                    .padding(.horizontal, 14).padding(.vertical, 8)
                                ForEach(monitor.selectedServices) { service in
                                    HStack(spacing: 8) {
                                        Image(systemName: service.symbol).foregroundStyle(service.color)
                                        Text(service.name).font(.system(size: 12))
                                        Spacer()
                                        if selected.requiredServices.contains(service.name) {
                                            Text("REQUIRED").font(.system(size: 9, weight: .bold)).foregroundStyle(.orange)
                                        }
                                        Text(service.title).font(.caption).foregroundStyle(.secondary)
                                    }
                                    .padding(.horizontal, 14).padding(.vertical, 5)
                                }
                                Divider()
                                Text("HEALTH GROUPS")
                                    .font(.caption.bold()).foregroundStyle(.secondary)
                                    .padding(.horizontal, 14).padding(.vertical, 8)
                            }
                            ForEach(report.groups) { group in
                                HStack {
                                    Text(group.name).font(.system(size: 12, weight: .medium))
                                    Spacer()
                                    Label(group.status.title, systemImage: group.status.symbol)
                                        .foregroundStyle(group.status.color).font(.caption)
                                }.padding(.horizontal, 14).padding(.vertical, 8)
                                Divider().padding(.leading, 14)
                            }
                        } else {
                            Text(monitor.selectedResult?.error ?? "Waiting for health data…")
                                .font(.caption).foregroundStyle(.secondary).padding(14)
                        }
                    }
                }.frame(height: 300)
            }
            Divider()
            let totals = monitor.aggregate
            Text("ALL SERVERS: \(totals.ok) OK  ·  \(totals.warn) WARN  ·  \(totals.fail) FAIL")
                .font(.caption.bold()).padding(14)
            if let error = monitor.selectedResult?.error {
                Text(error).foregroundStyle(.red).font(.caption).textSelection(.enabled)
                    .padding(.horizontal, 14).padding(.bottom, 8)
            }
            Divider()
            HStack {
                Button("Refresh All") { Task { await monitor.refreshAll() } }
                Spacer()
                Button("Diagnostics") { openWindow(id: "monitor-diagnostics") }
                Button("Settings") { openWindow(id: "monitor-settings") }
                Button("Quit") { NSApp.terminate(nil) }
            }.buttonStyle(.borderless).padding(14)
        }.frame(width: 410)
    }
}

struct DiagnosticsView: View {
    @ObservedObject var monitor: ServerMonitor
    var body: some View {
        VStack(alignment: .leading, spacing: 12) {
            Text("\(monitor.selected?.name ?? "Server") — Diagnostics").font(.title2.bold())
            Text("Select a server in the menu bar to change this report.").font(.caption).foregroundStyle(.secondary)
            ScrollView {
                LazyVStack(alignment: .leading, spacing: 10) {
                    ForEach(monitor.report?.checks ?? []) { check in
                        HStack(alignment: .top) {
                            Image(systemName: check.status.symbol).foregroundStyle(check.status.color)
                            VStack(alignment: .leading, spacing: 2) {
                                Text(check.name).fontWeight(.medium)
                                Text(check.detail).font(.caption).foregroundStyle(.secondary)
                            }
                            Spacer()
                        }
                    }
                }
            }.textSelection(.enabled)
        }.padding(20).frame(minWidth: 650, minHeight: 450)
    }
}