import Foundation

// MARK: - HomeViewModel
// Fetches home-screen data: continue reading, recently updated, stats, subscription feed.
// Uses @Observable (iOS 17+).

@Observable
@MainActor
final class HomeViewModel {
    var continueReading: [ContinueReadingItem] = []
    var recentlyUpdated: [Book] = []
    var stats: HomeStats?
    var subscriptionFeed: [SubscriptionFeedItem] = []
    var isLoading = false
    var error: String?

    func load() async {
        isLoading = true
        error = nil
        do {
            let data = try await APIClient.shared.homeData()
            continueReading = data.continueReading.map {
                ContinueReadingItem(book: $0.book, chapter: $0.chapter)
            }
            recentlyUpdated = data.recentlyUpdated
            stats = data.stats
            subscriptionFeed = data.subscriptionFeed
        } catch {
            if !(error is CancellationError) {
                self.error = error.localizedDescription
            }
        }
        isLoading = false
    }
}