#if os(iOS)
import SwiftUI

struct BookListView: View {
    @ObservedObject var importer: BundleImporter
    @ObservedObject var vm: LibraryViewModel
    @State private var selected: BookMeta? = nil

    private func bundleDir(of id: String) -> URL? { // 取最新导入目录
        guard let root = try? FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: false).appendingPathComponent("ImportedBundle") else { return nil }
        let subs = (try? FileManager.default.contentsOfDirectory(at: root, includingPropertiesForKeys: nil)) ?? []
        return subs.sorted { $0.lastPathComponent > $1.lastPathComponent }.first
    }

    var body: some View {
        VStack(spacing: 0) {
            HStack {
                TextField("搜索书名/作者", text: $vm.searchText)
                    .textFieldStyle(.roundedBorder)
                Button("导入") { importer.presentPicker() }
                if let msg = importer.progressMessage { Text(msg).font(.footnote).foregroundColor(.secondary) }
            }.padding(.horizontal).padding(.top,8)
            Divider()
            if vm.filteredBooks.isEmpty {
                    EmptyStateView(message: "无数据，点击导入按钮加载 ZIP", actionTitle: "导入") { importer.presentPicker() }
                        .frame(maxWidth: .infinity, maxHeight: .infinity)
            } else {
                List(vm.filteredBooks) { book in
                    Button {
                        selected = book
                    } label: {
                        HStack(alignment:.top, spacing:12) {
                            if let dir = bundleDir(of: book.id) {
                                CoverImageView(book: book, bundleDir: dir).frame(width:70,height:100)
                            }
                            VStack(alignment:.leading, spacing:4) {
                                Text(book.title).font(.headline)
                                Text(book.author).font(.subheadline).foregroundColor(.secondary)
                                if let rt = book.readtime_year { Text("全年阅读: \(rt/60) 小时").font(.caption).foregroundColor(.secondary) }
                                if book.is_finished_this_year == true { Text("今年已读完 ✅").font(.caption2).foregroundColor(.green) }
                            }
                            Spacer()
                        }
                    }
                }
            }
        }
        .sheet(item: $selected) { b in
            if let idx = importer.bundleIndex, let dir = bundleDir(of: b.id) {
                BookDetailView(book: b, index: idx, bundleDir: dir)
            } else {
                Text("数据缺失")
            }
        }
    }
}
#endif