import Foundation

/// What `build list` is narrowed to: `--ref`, `--status` and `--job`.
/// There is no state flag, so the default sends the bare command.
nonisolated struct BuildFilter: Equatable, Sendable {

    /// The vocabulary `--status` accepts; anything else is a usage error.
    enum Status: String, CaseIterable, Identifiable, Sendable {
        case pending, running, success, failure, cancelled

        var id: String { rawValue }
    }

    var ref = ""
    var status: Status?
    var job: String?

    func flags() -> [String] {
        var flags = filterFlag("--ref", ref)
        flags += filterFlag("--status", status?.rawValue)
        flags += filterFlag("--job", job)
        return flags
    }

    var isNarrowed: Bool { !flags().isEmpty }

    var emptyMessage: String {
        isNarrowed
            ? "No builds match these filters."
            : "No builds. Builds run when a push touches a repo with a .gitbay/ job file."
    }
}