import Foundation
import Observation

nonisolated struct BuildDetail: Sendable {
    let build: Build
    let log: String
}

/// One build: `build show` for what it was, `build log` for what it did.
/// The web's build page shows both; the log alone leaves the screen
/// unable to say whether the build passed.
@Observable
@MainActor
final class BuildDetailViewModel {

    private(set) var state: LoadState<BuildDetail> = .loading

    private let client: GitbayClient
    let repoPath: String
    let number: Int64

    init(client: GitbayClient, repoPath: String, number: Int64) {
        self.client = client
        self.repoPath = repoPath
        self.number = number
    }

    func load() async {
        let ref = [repoPath, String(number)]
        do {
            async let build = client.read(["build", "show"] + ref, as: Build.self)
            // A queued build has no log yet; that is not a failure.
            async let log = client.readText(["build", "log"] + ref)
            state = .loaded(BuildDetail(build: try await build, log: (try? await log) ?? ""))
        } catch {
            state = .from(error)
        }
    }
}