hyungi_document_server/clients/ds-app/Sources/AppFeature/Shell/RootView.swift

import SwiftUI
import DSKit

/// 2-column 셸 (사이드바 + 단일 detail). 각 섹션이 detail 전폭을 받아 자기 내부 레이아웃을 소유한다
/// (개요=풀폭 캔버스 / 문서=내부 HSplitView 3-pane / 메모=리스트+상세). 이전 3-column 이 대시보드를
/// 좁은 가운데칸에 욱여넣어 깨지던 문제를 구조적으로 제거. macOS-only.
/// 인증 게이트: checking(refresh 쿠키 복귀) → loggedOut(LoginView) → ready(셸).
public struct RootView: View {
    @Environment(AppModel.self) private var model
    @State private var columnVisibility: NavigationSplitViewVisibility = .all

    public init() {}

    public var body: some View {
        Group {
            switch model.authPhase {
            case .checking:
                ProgressView("서버 연결 확인 중")
                    .frame(maxWidth: .infinity, maxHeight: .infinity)
                    .background(Sage.surface)
            case .loggedOut:
                LoginView()
            case .ready:
                shell
            }
        }
        .task { await model.bootstrap() }
    }

    private var shell: some View {
        NavigationSplitView(columnVisibility: $columnVisibility) {
            Sidebar()
                .navigationSplitViewColumnWidth(min: 200, ideal: 215, max: 270)
        } detail: {
            SectionDetail()
        }
        .navigationSplitViewStyle(.balanced)
        .tint(Sage.brand)
        .toolbar {
            ToolbarItem(placement: .primaryAction) { UploadToolbarButton() }
            ToolbarItem(placement: .primaryAction) { AccountMenu() }
        }
        .safeAreaInset(edge: .bottom) {
            VStack(spacing: 0) {
                UploadStatusBar()
                // 라이브 데이터 호출 실패 가시화 (no-silent-fallback) — 닫기 전까지 유지.
                if let err = model.errorText {
                    HStack(spacing: 10) {
                        Text(err)
                            .font(.callout)
                            .foregroundStyle(.white)
                            .lineLimit(2)
                        Spacer()
                        Button("닫기") { model.errorText = nil }
                            .buttonStyle(.plain)
                            .foregroundStyle(.white.opacity(0.85))
                    }
                    .padding(.horizontal, 14)
                    .padding(.vertical, 8)
                    .background(Sage.danger)
                }
            }
        }
    }
}

// MARK: - Sidebar

struct Sidebar: View {
    @Environment(AppModel.self) private var model
    private let navSections: [AppModel.Section] = [.dashboard, .documents, .digest, .memos]

    var body: some View {
        let selection = Binding<AppModel.Section?>(
            get: { model.section },
            set: { if let v = $0 { model.section = v } }
        )
        List(selection: selection) {
            BrandRow().selectionDisabled()
            Section {
                ForEach(navSections) { s in
                    Label(s.title, systemImage: Self.icon(s)).tag(s)
                }
            }
            // 문서 섹션일 때만 분류 소스트리 노출 (다른 섹션은 4-섹션만 보임).
            if model.section == .documents {
                DocumentsSourceSidebar()
            }
        }
        .listStyle(.sidebar)
        .background(Sage.sidebar)
    }

    static func icon(_ s: AppModel.Section) -> String {
        switch s {
        case .dashboard: return "house"
        case .documents: return "folder"
        case .digest: return "newspaper"
        case .memos: return "note.text"
        }
    }
}

struct BrandRow: View {
    var body: some View {
        HStack(spacing: 8) {
            RoundedRectangle(cornerRadius: 7).fill(Sage.brand).frame(width: 26, height: 26)
                .overlay(Text("DS").font(.system(size: 10, weight: .heavy)).foregroundStyle(.white))
            Text("Document Server").font(.system(size: 13.5, weight: .heavy)).foregroundStyle(Sage.ink)
        }
        .padding(.vertical, 4)
    }
}

/// 문서 전용 소스트리: 분류(도메인 필터 = 실데이터) + 스마트그룹/태그(데이터 미연결 placeholder).
struct DocumentsSourceSidebar: View {
    @Environment(AppModel.self) private var model

    var body: some View {
        Section("분류") {
            SourceRow(label: "전체 문서", color: nil, count: model.stats?.total,
                      selected: model.documentDomainFilter == nil) {
                Task { await model.loadDocuments(domain: nil) }
            }
            ForEach(model.tree) { node in
                SourceRow(label: localizedDomain(node.name), color: Sage.domainColor(node.name),
                          count: node.count, selected: model.documentDomainFilter == node.path) {
                    Task { await model.loadDocuments(domain: node.path) }
                }
            }
        }
        // 데이터 미연결 — IA 만 맞추고 비활성(가짜 카운트 금지).
        Section("스마트 그룹") {
            ForEach(["최근 7일", "검토 대기", "법령 알림"], id: \.self) { t in
                Text(t).font(.callout).foregroundStyle(Sage.muted).opacity(0.5)
            }
        }
        Section("태그") {
            ForEach(["압력용기", "ASME", "받은편지함"], id: \.self) { t in
                Text("#\(t)").font(.callout).foregroundStyle(Sage.muted).opacity(0.5)
            }
        }
    }
}

/// 소스트리 행 (분류). 선택 시 brand-soft 배경 — List 시스템 선택과 분리(수동 하이라이트).
struct SourceRow: View {
    let label: String
    let color: Color?
    let count: Int?
    let selected: Bool
    let action: () -> Void

    var body: some View {
        HStack(spacing: 8) {
            if let color { RoundedRectangle(cornerRadius: 3).fill(color).frame(width: 8, height: 8) }
            Text(label).font(.callout)
                .foregroundStyle(selected ? Sage.brandDark : Sage.ink)
                .fontWeight(selected ? .bold : .regular)
                .lineLimit(1)
            Spacer()
            if let count { Text("\(count)").font(.caption.monospacedDigit()).foregroundStyle(Sage.muted) }
        }
        .padding(.vertical, 2)
        .contentShape(Rectangle())
        .onTapGesture(perform: action)
        .listRowBackground(selected ? Sage.brand.opacity(0.14) : Color.clear)
    }
}

// MARK: - Section router

/// 선택 섹션을 detail 전폭으로 라우팅. 셸 차원 inspector/list 칼럼 없음 — 각 페이지가 내부에서 소유.
struct SectionDetail: View {
    @Environment(AppModel.self) private var model

    var body: some View {
        Group {
            switch model.section {
            case .dashboard: DashboardView()       // 풀폭 캔버스
            case .documents: DocumentsBrowser()    // 내부 HSplitView 3-pane
            case .digest:    DigestView()          // 풀폭 (뉴스 — 후속 모닝브리핑 재구성)
            case .memos:     MemosBoard()          // 리스트 + 상세 (후속 버킷 트리아지)
            }
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .background(Sage.surface)
        .navigationTitle(model.section.title)
    }
}

/// 메모 — v1 리스트+상세 split (확정 버킷 트리아지는 후속 트랙).
struct MemosBoard: View {
    @Environment(AppModel.self) private var model

    var body: some View {
        HSplitView {
            MemoListView()
                .frame(minWidth: 300, idealWidth: 360, maxWidth: 460)
            Group {
                if let m = model.memoDetail { MemoDetailView(memo: m) }
                else { EmptyState(text: "메모를 선택하세요") }
            }
            .frame(minWidth: 360, maxWidth: .infinity)
        }
    }
}

struct EmptyState: View {
    let text: String
    var body: some View {
        Text(text)
            .foregroundStyle(Sage.muted)
            .frame(maxWidth: .infinity, maxHeight: .infinity)
            .background(Sage.surface)
    }
}

// MARK: - Toolbar items

/// 툴바 업로드 버튼 — NSOpenPanel 로 파일 선택 → 멀티파트 업로드. 진행 중 비활성.
struct UploadToolbarButton: View {
    @Environment(AppModel.self) private var model

    var body: some View {
        Button {
            guard let fileURL = FilePanels.pickFileToUpload() else { return }
            Task { await model.uploadPicked(fileURL) }
        } label: {
            Label("업로드", systemImage: "square.and.arrow.up")
        }
        .help("문서 업로드")
        .disabled(isUploading)
    }

    private var isUploading: Bool {
        if case .uploading = model.uploadState { return true }
        return false
    }
}

/// 계정 메뉴 — 사용자명 표시 + 로그아웃(확인 대화상자).
struct AccountMenu: View {
    @Environment(AppModel.self) private var model
    @State private var confirmLogout = false

    var body: some View {
        Menu {
            Button("로그아웃", role: .destructive) { confirmLogout = true }
        } label: {
            Label(model.currentUser?.username ?? "계정", systemImage: "person.crop.circle")
        }
        .help("계정")
        .confirmationDialog("로그아웃하시겠습니까?", isPresented: $confirmLogout, titleVisibility: .visible) {
            Button("로그아웃", role: .destructive) { Task { await model.logout() } }
            Button("취소", role: .cancel) {}
        }
    }
}

/// 업로드 진행/결과 상태바. uploading=스피너(닫기 없음) / done=성공(처리 대기 안내)+닫기 / failed=오류+닫기.
struct UploadStatusBar: View {
    @Environment(AppModel.self) private var model

    var body: some View {
        switch model.uploadState {
        case .idle:
            EmptyView()
        case .uploading(let name):
            row(bg: Sage.brand) {
                ProgressView().controlSize(.small).tint(.white)
                Text("업로드 중 — \(name)").font(.callout).foregroundStyle(.white).lineLimit(1)
                Spacer()
            }
        case .done(let title):
            row(bg: Sage.brand) {
                Text("업로드 완료 — \(title) (처리 대기 중)").font(.callout).foregroundStyle(.white).lineLimit(1)
                Spacer()
                closeButton
            }
        case .failed(let msg):
            row(bg: Sage.danger) {
                Text("업로드 실패 — \(msg)").font(.callout).foregroundStyle(.white).lineLimit(2)
                Spacer()
                closeButton
            }
        }
    }

    private var closeButton: some View {
        Button("닫기") { model.dismissUploadStatus() }
            .buttonStyle(.plain)
            .foregroundStyle(.white.opacity(0.85))
    }

    private func row<Content: View>(bg: Color, @ViewBuilder _ content: () -> Content) -> some View {
        HStack(spacing: 10) { content() }
            .padding(.horizontal, 14)
            .padding(.vertical, 8)
            .background(bg)
    }
}

#if DEBUG
#Preview("DS App — full shell") {
    @Previewable @State var model = AppModel.preview
    RootView()
        .environment(model)
        .frame(minWidth: 1100, minHeight: 700)
}
#endif