import Combine
import CoreDomain
import Foundation

/// Fake 会话仓库（登录态在进程内共享，默认未登录）。
public final class FakeSessionRepository: SessionRepository, @unchecked Sendable {
    private let isLoggedIn = CurrentValueSubject<Bool, Never>(false)

    public init() {}

    public func observeIsLoggedIn() -> AsyncThrowingStream<Bool, Error> {
        AsyncThrowingStream { continuation in
            let cancellable = self.isLoggedIn.sink { continuation.yield($0) }
            continuation.onTermination = { _ in cancellable.cancel() }
        }
    }

    public func requestSmsCode(phone: String) async throws {
        try await Task.sleep(for: .milliseconds(500))
        guard phone.range(of: #"^1\d{10}$"#, options: .regularExpression) != nil else {
            throw SessionError.invalidPhone
        }
    }

    public func login(phone: String, code: String) async throws {
        try await Task.sleep(for: .milliseconds(500))
        guard code == "123456" else {
            throw SessionError.wrongCode
        }
        guard phone == "13812341234" else {
            throw SessionError.phoneNotMatched
        }
        isLoggedIn.value = true
    }

    public func logout() async throws {
        isLoggedIn.value = false
    }
}