import Foundation

/// Minimal "any JSON" box for a flag's `payload`, which the backend declares as
/// `additionalProperties: true` (arbitrary shape). No force operations — an
/// unrecognized shape throws a `DecodingError`, it never crashes.
public indirect enum FeatureControlJSON: Decodable, Sendable, Equatable {
    case null
    case bool(Bool)
    case number(Double)
    case string(String)
    case array([FeatureControlJSON])
    case object([String: FeatureControlJSON])

    public init(from decoder: Decoder) throws {
        let container = try decoder.singleValueContainer()
        if container.decodeNil() {
            self = .null
        } else if let value = try? container.decode(Bool.self) {
            self = .bool(value)
        } else if let value = try? container.decode(Double.self) {
            self = .number(value)
        } else if let value = try? container.decode(String.self) {
            self = .string(value)
        } else if let value = try? container.decode([FeatureControlJSON].self) {
            self = .array(value)
        } else if let value = try? container.decode([String: FeatureControlJSON].self) {
            self = .object(value)
        } else {
            throw DecodingError.dataCorruptedError(in: container,
                                                    debugDescription: "Unsupported JSON value for FeatureControlJSON")
        }
    }
}