import Foundation

/// 会话相关错误。
public enum SessionError: Error, Sendable, LocalizedError {
    case invalidPhone
    case wrongCode
    case phoneNotMatched

    public var errorDescription: String? {
        switch self {
        case .invalidPhone: return "请输入正确的手机号"
        case .wrongCode: return "验证码错误"
        case .phoneNotMatched: return "手机号未匹配，无法登录"
        }
    }
}

/// 会话仓库协议（登录态 / 手机号登录）。
public protocol SessionRepository: Sendable {
    /// 观察登录态。
    func observeIsLoggedIn() -> AsyncThrowingStream<Bool, Error>
    /// 请求短信验证码。
    func requestSmsCode(phone: String) async throws
    /// 手机号 + 验证码登录。
    func login(phone: String, code: String) async throws
    /// 退出登录。
    func logout() async throws
}