furumi_macos/furumi_macos/ArtistDetailViewModel.swift

//
//  ArtistDetailViewModel.swift
//  furumi_macos
//

import Foundation
import Observation

@MainActor
@Observable
final class ArtistDetailViewModel {
    private var service: CatalogService
    private(set) var detail: ArtistDetail?
    private(set) var isLoading = false
    private(set) var error: String?

    init(service: CatalogService) {
        self.service = service
    }

    func reset(service: CatalogService) {
        self.service = service
        self.detail = nil
        self.error = nil
        self.isLoading = false
    }

    func load(artistId: Int64) async {
        guard !isLoading else { return }
        isLoading = true
        error = nil
        defer { isLoading = false }
        do {
            detail = try await service.artistDetail(id: artistId)
        } catch {
            self.error = (error as NSError).localizedDescription
            self.detail = nil
        }
    }
}