import Foundation
import Observation

@Observable
@MainActor
final class GameCenterViewModel {
    var feed: LiveGameFeed?
    var isLoading = false
    var errorMessage: String?
    var lastUpdated: Date?

    private let statsAPI = MLBStatsAPI()

    func watch(game: Game) async {
        guard let gamePk = game.gamePk else {
            errorMessage = "No live game feed is available for this matchup."
            return
        }

        while !Task.isCancelled {
            await refresh(gamePk: gamePk)

            let liveState = feed?.gameData.status?.abstractGameState == "Live"
            if !liveState {
                break
            }

            try? await Task.sleep(for: .seconds(12))
        }
    }

    func refresh(gamePk: String) async {
        isLoading = true
        errorMessage = nil

        do {
            feed = try await statsAPI.fetchGameFeed(gamePk: gamePk)
            lastUpdated = Date()
        } catch {
            errorMessage = "Failed to load game center."
        }

        isLoading = false
    }
}