import Foundation
import Postbox
import SwiftSignalKit
import TelegramApi
import SyncCore

public enum ServerProvidedSuggestion: String {
    case autoarchivePopular = "AUTOARCHIVE_POPULAR"
    case newcomerTicks = "NEWCOMER_TICKS"
}

public func getServerProvidedSuggestions(postbox: Postbox) -> Signal<[ServerProvidedSuggestion], NoError> {
    let key: PostboxViewKey = .preferences(keys: Set([PreferencesKeys.appConfiguration]))
    return postbox.combinedView(keys: [key])
    |> map { views -> [ServerProvidedSuggestion] in
        guard let view = views.views[key] as? PreferencesView else {
            return []
        }
        guard let appConfiguration = view.values[PreferencesKeys.appConfiguration] as? AppConfiguration else {
            return []
        }
        guard let data = appConfiguration.data, let list = data["pending_suggestions"] as? [String] else {
            return []
        }
        return list.compactMap { item -> ServerProvidedSuggestion? in
            return ServerProvidedSuggestion(rawValue: item)
        }
    }
    |> distinctUntilChanged
}

public func dismissServerProvidedSuggestion(account: Account, suggestion: ServerProvidedSuggestion) -> Signal<Never, NoError> {
    return account.network.request(Api.functions.help.dismissSuggestion(peer: .inputPeerEmpty, suggestion: suggestion.rawValue))
    |> `catch` { _ -> Signal<Api.Bool, NoError> in
        return .single(.boolFalse)
    }
    |> ignoreValues
}


public enum PeerSpecificServerProvidedSuggestion: String {
    case convertToGigagroup = "CONVERT_TO_GIGAGROUP"
}

public func getPeerSpecificServerProvidedSuggestions(postbox: Postbox, peerId: PeerId) -> Signal<[PeerSpecificServerProvidedSuggestion], NoError> {
    return postbox.peerView(id: peerId)
    |> map { view in
        if let cachedData = view.cachedData as? CachedChannelData {
            return cachedData.pendingSuggestions.compactMap { item -> PeerSpecificServerProvidedSuggestion? in
                return PeerSpecificServerProvidedSuggestion(rawValue: item)
            }
        }
        return []
    }
    |> distinctUntilChanged
}

public func dismissPeerSpecificServerProvidedSuggestion(account: Account, peerId: PeerId, suggestion: PeerSpecificServerProvidedSuggestion) -> Signal<Never, NoError> {
    return account.postbox.loadedPeerWithId(peerId)
    |> mapToSignal { peer -> Signal<Never, NoError> in
        guard let inputPeer = apiInputPeer(peer) else {
            return .never()
        }
        return account.network.request(Api.functions.help.dismissSuggestion(peer: inputPeer, suggestion: suggestion.rawValue))
        |> `catch` { _ -> Signal<Api.Bool, NoError> in
            return .single(.boolFalse)
        }
        |> ignoreValues
    }
}