import XCTest

@testable import MultiSimAdmin

@MainActor
final class FleetViewModelTests: XCTestCase {
    func testRefreshSortsByNameAndReportsStatus() async throws {
        let repository = MemoryInstanceRepository()
        let model = FleetViewModel(
            repository: repository,
            probe: ConnectionProbe(client: AlwaysOnlineClient()),
            credentials: NoopCredentialStore()
        )
        try await model.add(InstanceInput(
            name: "Zulu",
            origin: URL(string: "http://192.168.1.30:3000")!,
            tags: ["lab"],
            password: nil
        ))
        try await model.add(InstanceInput(
            name: "Alpha",
            origin: URL(string: "http://192.168.1.20:3000")!,
            tags: [],
            password: nil
        ))

        await model.refresh()

        XCTAssertEqual(model.rows.map(\.instance.name), ["Alpha", "Zulu"])
        XCTAssertEqual(model.rows.map(\.status), [.online, .online])
    }

    func testAddValidatesPasswordAndDeleteRemovesCredential() async throws {
        let repository = MemoryInstanceRepository()
        let credentials = NoopCredentialStore()
        let model = FleetViewModel(
            repository: repository,
            probe: ConnectionProbe(client: AlwaysOnlineClient()),
            credentials: credentials
        )
        try await model.add(InstanceInput(
            name: "Secret",
            origin: URL(string: "http://192.168.1.40:3000")!,
            password: "pass"
        ))

        let row = try XCTUnwrap(model.rows.first)
        XCTAssertTrue(row.instance.credentialConfigured)
        XCTAssertEqual(credentials.saved[row.instance.id], "pass")

        await model.delete([row.instance.id])
        XCTAssertTrue(model.rows.isEmpty)
        XCTAssertNil(credentials.saved[row.instance.id])
    }
}

struct AlwaysOnlineClient: SimAdminClientProtocol {
    func send(_: UpstreamRoute, baseURL: URL, cookie: String?) async throws -> UpstreamResponse {
        UpstreamResponse(status: 200, data: Data("{}".utf8))
    }
}

final class NoopCredentialStore: CredentialStore {
    private let lock = NSLock()
    private var savedStorage: [UUID: String] = [:]
    private var removedStorage: [UUID] = []

    var saved: [UUID: String] {
        lock.withLock { savedStorage }
    }

    var removed: [UUID] {
        lock.withLock { removedStorage }
    }

    func get(instanceID: UUID) throws -> String? {
        saved[instanceID]
    }

    func set(instanceID: UUID, password: String) throws {
        lock.withLock { savedStorage[instanceID] = password }
    }

    func remove(instanceID: UUID) throws {
        lock.withLock {
            savedStorage[instanceID] = nil
            removedStorage.append(instanceID)
        }
    }
}

final class MemoryInstanceRepository: InstanceRepository {
    private let lock = NSLock()
    private var itemsStorage: [Instance] = []

    private var items: [Instance] {
        get { lock.withLock { itemsStorage } }
        set { lock.withLock { itemsStorage = newValue } }
    }

    func list(_: InstanceQuery) async throws -> [Instance] {
        items.sorted { $0.name.localizedCompare($1.name) == .orderedAscending }
    }

    func get(_ id: UUID) async throws -> Instance? {
        items.first { $0.id == id }
    }

    func create(_ input: InstanceInput) async throws -> Instance {
        let now = Date()
        let instance = Instance(
            id: UUID(),
            name: input.name,
            origin: input.origin,
            tags: input.tags,
            groupId: input.groupId,
            credentialConfigured: !(input.password ?? "").isEmpty,
            configRevision: 1,
            createdAt: now,
            updatedAt: now
        )
        items.append(instance)
        return instance
    }

    func update(_: UUID, expectedRevision: Int, _: InstancePatch) async throws -> Instance {
        throw RepositoryError.notFound
    }

    func delete(_ id: UUID, expectedRevision: Int) async throws {
        items.removeAll { $0.id == id }
    }
}