import Foundation

// The models for what `pet-life` prints, in a library so the contract can be
// tested. Field names match its JSON exactly, and that JSON is pinned to exact
// bytes by a test on the Rust side — this is the other half of the same
// contract. The wire format between the daemon and the collector has drifted
// twice in this project; both times a pinned fixture caught it.

/// What `pet-life` prints. Field names match its JSON exactly; that contract is
/// pinned to exact bytes by a test on the Rust side.
public struct Grave: Decodable {
    public init(name: String, generation: Int, lived_days: Double) {
        self.name = name; self.generation = generation; self.lived_days = lived_days
    }

    public let name: String
    public let generation: Int
    public let lived_days: Double
}

public struct PetState: Decodable {
    public let alive: Bool
    public let name: String?
    public let generation: Int?
    public let stage: String
    public let face: String
    public let age_days: Double
    public let quiet_days: Double
    public let cemetery: [Grave]
}

public extension PetState {
    /// Decode what `pet-life` printed.
    static func decode(_ data: Data) throws -> PetState {
        try JSONDecoder().decode(PetState.self, from: data)
    }
}