import Foundation
import Postbox
import SwiftSignalKit

public enum TotalUnreadCountDisplayStyle: Int32 {
    case filtered = 0
    case raw = 1
}

public enum TotalUnreadCountDisplayCategory: Int32 {
    case chats = 0
    case messages = 1
}

public struct InAppNotificationSettings: PreferencesEntry, Equatable {
    public var playSounds: Bool
    public var vibrate: Bool
    public var displayPreviews: Bool
    public var totalUnreadCountDisplayStyle: TotalUnreadCountDisplayStyle
    public var totalUnreadCountDisplayCategory: TotalUnreadCountDisplayCategory
    public var displayNameOnLockscreen: Bool
    
    public static var defaultSettings: InAppNotificationSettings {
        return InAppNotificationSettings(playSounds: true, vibrate: false, displayPreviews: true, totalUnreadCountDisplayStyle: .filtered, totalUnreadCountDisplayCategory: .chats, displayNameOnLockscreen: true)
    }
    
    init(playSounds: Bool, vibrate: Bool, displayPreviews: Bool, totalUnreadCountDisplayStyle: TotalUnreadCountDisplayStyle, totalUnreadCountDisplayCategory: TotalUnreadCountDisplayCategory, displayNameOnLockscreen: Bool) {
        self.playSounds = playSounds
        self.vibrate = vibrate
        self.displayPreviews = displayPreviews
        self.totalUnreadCountDisplayStyle = totalUnreadCountDisplayStyle
        self.totalUnreadCountDisplayCategory = totalUnreadCountDisplayCategory
        self.displayNameOnLockscreen = displayNameOnLockscreen
    }
    
    public init(decoder: PostboxDecoder) {
        self.playSounds = decoder.decodeInt32ForKey("s", orElse: 0) != 0
        self.vibrate = decoder.decodeInt32ForKey("v", orElse: 0) != 0
        self.displayPreviews = decoder.decodeInt32ForKey("p", orElse: 0) != 0
        self.totalUnreadCountDisplayStyle = TotalUnreadCountDisplayStyle(rawValue: decoder.decodeInt32ForKey("tds", orElse: 0)) ?? .filtered
        self.totalUnreadCountDisplayCategory = TotalUnreadCountDisplayCategory(rawValue: decoder.decodeInt32ForKey("totalUnreadCountDisplayCategory", orElse: 0)) ?? .messages
        self.displayNameOnLockscreen = decoder.decodeInt32ForKey("displayNameOnLockscreen", orElse: 1) != 0
    }
    
    public func encode(_ encoder: PostboxEncoder) {
        encoder.encodeInt32(self.playSounds ? 1 : 0, forKey: "s")
        encoder.encodeInt32(self.vibrate ? 1 : 0, forKey: "v")
        encoder.encodeInt32(self.displayPreviews ? 1 : 0, forKey: "p")
        encoder.encodeInt32(self.totalUnreadCountDisplayStyle.rawValue, forKey: "tds")
        encoder.encodeInt32(self.totalUnreadCountDisplayCategory.rawValue, forKey: "totalUnreadCountDisplayCategory")
        encoder.encodeInt32(self.displayNameOnLockscreen ? 1 : 0, forKey: "displayNameOnLockscreen")
    }
    
    public func isEqual(to: PreferencesEntry) -> Bool {
        if let to = to as? InAppNotificationSettings {
            return self == to
        } else {
            return false
        }
    }
}

func updateInAppNotificationSettingsInteractively(postbox: Postbox, _ f: @escaping (InAppNotificationSettings) -> InAppNotificationSettings) -> Signal<Void, NoError> {
    return postbox.transaction { transaction -> Void in
        transaction.updatePreferencesEntry(key: ApplicationSpecificPreferencesKeys.inAppNotificationSettings, { entry in
            let currentSettings: InAppNotificationSettings
            if let entry = entry as? InAppNotificationSettings {
                currentSettings = entry
            } else {
                currentSettings = InAppNotificationSettings.defaultSettings
            }
            return f(currentSettings)
        })
    }
}