import SwiftUI

struct ContentGridView: View {
    let items: [ContentItem]
    var onNearEnd: (() -> Void)?

    private let columns = [
        GridItem(.adaptive(minimum: 130, maximum: 180), spacing: 12)
    ]

    var body: some View {
        LazyVGrid(columns: columns, spacing: 16) {
            ForEach(items) { item in
                NavigationLink(value: item) {
                    ContentCardView(item: item)
                }
                .buttonStyle(.plain)
                .onAppear {
                    if let onNearEnd, isNearEnd(item) {
                        onNearEnd()
                    }
                }
            }
        }
    }

    private func isNearEnd(_ item: ContentItem) -> Bool {
        guard let index = items.firstIndex(where: { $0.id == item.id }) else { return false }
        return index >= items.count - 4
    }
}