import Foundation

public enum WidgetCodingError: Error {
    case generic
}

public struct WidgetDataPeer: Codable, Equatable {
    public struct Badge: Codable, Equatable {
        public var count: Int
        public var isMuted: Bool
        
        public init(count: Int, isMuted: Bool) {
            self.count = count
            self.isMuted = isMuted
        }
    }
    
    public struct Message: Codable, Equatable {
        public struct Author: Codable, Equatable {
            public var isMe: Bool
            public var title: String
            
            public init(isMe: Bool, title: String) {
                self.isMe = isMe
                self.title = title
            }
        }
        
        public enum Content: Codable, Equatable {
            public enum DecodingError: Error {
                case generic
            }
            
            public struct Image: Codable, Equatable {
                public init() {
                }
            }
            
            public struct Video: Codable, Equatable {
                public init() {
                }
            }
            
            public struct File: Codable, Equatable {
                public var name: String
                
                public init(name: String) {
                    self.name = name
                }
            }
            
            public struct Gif: Codable, Equatable {
                public init() {
                }
            }
            
            public struct Music: Codable, Equatable {
                public var artist: String
                public var title: String
                public var duration: Int32
                
                public init(artist: String, title: String, duration: Int32) {
                    self.artist = artist
                    self.title = title
                    self.duration = duration
                }
            }
            
            public struct VoiceMessage: Codable, Equatable {
                public var duration: Int32
                
                public init(duration: Int32) {
                    self.duration = duration
                }
            }
            
            public struct VideoMessage: Codable, Equatable {
                public var duration: Int32
                
                public init(duration: Int32) {
                    self.duration = duration
                }
            }
            
            public struct Sticker: Codable, Equatable {
                public var altText: String
                
                public init(altText: String) {
                    self.altText = altText
                }
            }
            
            public struct Call: Codable, Equatable {
                public var isVideo: Bool
                
                public init(isVideo: Bool) {
                    self.isVideo = isVideo
                }
            }
            
            public struct MapLocation: Codable, Equatable {
                public init() {
                }
            }
            
            public struct Game: Codable, Equatable {
                public var title: String
                
                public init(title: String) {
                    self.title = title
                }
            }
            
            public struct Poll: Codable, Equatable {
                public var title: String
                
                public init(title: String) {
                    self.title = title
                }
            }
            
            public struct AutodeleteTimer: Codable, Equatable {
                public var value: Int32?
                
                public init(value: Int32?) {
                    self.value = value
                }
            }
            
            enum CodingKeys: String, CodingKey {
                case text
                case image
                case video
                case file
                case gif
                case music
                case voiceMessage
                case videoMessage
                case sticker
                case call
                case mapLocation
                case game
                case poll
                case autodeleteTimer
            }
            
            case text
            case image(Image)
            case video(Video)
            case file(File)
            case gif(Gif)
            case music(Music)
            case voiceMessage(VoiceMessage)
            case videoMessage(VideoMessage)
            case sticker(Sticker)
            case call(Call)
            case mapLocation(MapLocation)
            case game(Game)
            case poll(Poll)
            case autodeleteTimer(AutodeleteTimer)
            
            public init(from decoder: Decoder) throws {
                let container = try decoder.container(keyedBy: CodingKeys.self)
                if let _ = try? container.decode(String.self, forKey: .text) {
                    self = .text
                } else if let image = try? container.decode(Image.self, forKey: .image) {
                    self = .image(image)
                } else if let video = try? container.decode(Video.self, forKey: .video) {
                    self = .video(video)
                } else if let gif = try? container.decode(Gif.self, forKey: .gif) {
                    self = .gif(gif)
                } else if let file = try? container.decode(File.self, forKey: .file) {
                    self = .file(file)
                } else if let music = try? container.decode(Music.self, forKey: .voiceMessage) {
                    self = .music(music)
                } else if let voiceMessage = try? container.decode(VoiceMessage.self, forKey: .voiceMessage) {
                    self = .voiceMessage(voiceMessage)
                } else if let videoMessage = try? container.decode(VideoMessage.self, forKey: .videoMessage) {
                    self = .videoMessage(videoMessage)
                } else if let sticker = try? container.decode(Sticker.self, forKey: .sticker) {
                    self = .sticker(sticker)
                } else if let call = try? container.decode(Call.self, forKey: .call) {
                    self = .call(call)
                } else if let mapLocation = try? container.decode(MapLocation.self, forKey: .mapLocation) {
                    self = .mapLocation(mapLocation)
                } else if let game = try? container.decode(Game.self, forKey: .game) {
                    self = .game(game)
                } else if let poll = try? container.decode(Poll.self, forKey: .poll) {
                    self = .poll(poll)
                } else if let autodeleteTimer = try? container.decode(AutodeleteTimer.self, forKey: .autodeleteTimer) {
                    self = .autodeleteTimer(autodeleteTimer)
                } else {
                    throw DecodingError.generic
                }
            }
            
            public func encode(to encoder: Encoder) throws {
                var container = encoder.container(keyedBy: CodingKeys.self)
                switch self {
                case .text:
                    try container.encode("", forKey: .text)
                case let .image(image):
                    try container.encode(image, forKey: .image)
                case let .video(video):
                    try container.encode(video, forKey: .video)
                case let .file(file):
                    try container.encode(file, forKey: .file)
                case let .gif(gif):
                    try container.encode(gif, forKey: .gif)
                case let .music(music):
                    try container.encode(music, forKey: .music)
                case let .voiceMessage(voiceMessage):
                    try container.encode(voiceMessage, forKey: .voiceMessage)
                case let .videoMessage(videoMessage):
                    try container.encode(videoMessage, forKey: .videoMessage)
                case let .sticker(sticker):
                    try container.encode(sticker, forKey: .sticker)
                case let .call(call):
                    try container.encode(call, forKey: .call)
                case let .mapLocation(mapLocation):
                    try container.encode(mapLocation, forKey: .mapLocation)
                case let .game(game):
                    try container.encode(game, forKey: .game)
                case let .poll(poll):
                    try container.encode(poll, forKey: .poll)
                case let .autodeleteTimer(autodeleteTimer):
                    try container.encode(autodeleteTimer, forKey: .autodeleteTimer)
                }
            }
        }
        
        public var author: Author?
        public var text: String
        public var content: Content
        public var timestamp: Int32
        
        public init(author: Author?, text: String, content: Content, timestamp: Int32) {
            self.author = author
            self.text = text
            self.content = content
            self.timestamp = timestamp
        }
    }
    
    public var id: Int64
    public var name: String
    public var lastName: String?
    public var letters: [String]
    public var avatarPath: String?
    public var badge: Badge?
    public var message: Message?
    public var isForum: Bool
    
    public init(id: Int64, name: String, lastName: String?, letters: [String], avatarPath: String?, badge: Badge?, message: Message?, isForum: Bool) {
        self.id = id
        self.name = name
        self.lastName = lastName
        self.letters = letters
        self.avatarPath = avatarPath
        self.badge = badge
        self.message = message
        self.isForum = isForum
    }
}

public struct WidgetDataPeers: Codable, Equatable {
    public var accountPeerId: Int64
    public var peers: [WidgetDataPeer]
    public var updateTimestamp: Int32
    
    public init(accountPeerId: Int64, peers: [WidgetDataPeer], updateTimestamp: Int32) {
        self.accountPeerId = accountPeerId
        self.peers = peers
        self.updateTimestamp = updateTimestamp
    }
}

public struct WidgetPresentationData: Codable, Equatable {
    public var widgetChatsGalleryTitle: String
    public var widgetChatsGalleryDescription: String
    public var widgetShortcutsGalleryTitle: String
    public var widgetShortcutsGalleryDescription: String
    
    public var widgetLongTapToEdit: String
    public var widgetUpdatedTodayAt: String
    public var widgetUpdatedAt: String
    
    public var messageAuthorYou: String
    public var messagePhoto: String
    public var messageVideo: String
    public var messageAnimation: String
    public var messageVoice: String
    public var messageVideoMessage: String
    public var messageSticker: String
    public var messageVoiceCall: String
    public var messageVideoCall: String
    public var messageLocation: String
    
    public var autodeleteTimerUpdated: String
    public var autodeleteTimerRemoved: String
    
    public var generalLockedTitle: String
    public var generalLockedText: String
    
    public var chatSavedMessages: String
    
    public init(
        widgetChatsGalleryTitle: String,
        widgetChatsGalleryDescription: String,
        widgetShortcutsGalleryTitle: String,
        widgetShortcutsGalleryDescription: String,
        widgetLongTapToEdit: String,
        widgetUpdatedTodayAt: String,
        widgetUpdatedAt: String,
        messageAuthorYou: String,
        messagePhoto: String,
        messageVideo: String,
        messageAnimation: String,
        messageVoice: String,
        messageVideoMessage: String,
        messageSticker: String,
        messageVoiceCall: String,
        messageVideoCall: String,
        messageLocation: String,
        autodeleteTimerUpdated: String,
        autodeleteTimerRemoved: String,
        generalLockedTitle: String,
        generalLockedText: String,
        chatSavedMessages: String
    ) {
        self.widgetChatsGalleryTitle = widgetChatsGalleryTitle
        self.widgetChatsGalleryDescription = widgetChatsGalleryDescription
        self.widgetShortcutsGalleryTitle = widgetShortcutsGalleryTitle
        self.widgetShortcutsGalleryDescription = widgetShortcutsGalleryDescription
        self.widgetLongTapToEdit = widgetLongTapToEdit
        self.widgetUpdatedTodayAt = widgetUpdatedTodayAt
        self.widgetUpdatedAt = widgetUpdatedAt
        self.messageAuthorYou = messageAuthorYou
        self.messagePhoto = messagePhoto
        self.messageVideo = messageVideo
        self.messageAnimation = messageAnimation
        self.messageVoice = messageVoice
        self.messageVideoMessage = messageVideoMessage
        self.messageSticker = messageSticker
        self.messageVoiceCall = messageVoiceCall
        self.messageVideoCall = messageVideoCall
        self.messageLocation = messageLocation
        self.autodeleteTimerUpdated = autodeleteTimerUpdated
        self.autodeleteTimerRemoved = autodeleteTimerRemoved
        self.generalLockedTitle = generalLockedTitle
        self.generalLockedText = generalLockedText
        self.chatSavedMessages = chatSavedMessages
    }
    
    public static func getForExtension() -> WidgetPresentationData {
        let appBundleIdentifier = Bundle.main.bundleIdentifier!
        guard let lastDotRange = appBundleIdentifier.range(of: ".", options: [.backwards]) else {
            return WidgetPresentationData.default
        }
        let baseAppBundleId = String(appBundleIdentifier[..<lastDotRange.lowerBound])
        
        let appGroupName = "group.\(baseAppBundleId)"
        let maybeAppGroupUrl = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: appGroupName)
        
        guard let appGroupUrl = maybeAppGroupUrl else {
            return WidgetPresentationData.default
        }
        
        let rootPath = rootPathForBasePath(appGroupUrl.path)
        
        if let data = try? Data(contentsOf: URL(fileURLWithPath: widgetPresentationDataPath(rootPath: rootPath))), let value = try? JSONDecoder().decode(WidgetPresentationData.self, from: data) {
            return value
        } else {
            return WidgetPresentationData.default
        }
    }
}

public extension WidgetPresentationData {
    static var `default` = WidgetPresentationData(
        widgetChatsGalleryTitle: "Chats",
        widgetChatsGalleryDescription: "Display the latest message from the most important chats.",
        widgetShortcutsGalleryTitle: "Shortcuts",
        widgetShortcutsGalleryDescription: "Display shortcuts of your most important chats to always have quick access to them.",
        widgetLongTapToEdit: "Tap or hold to edit widget.",
        widgetUpdatedTodayAt: "Updated at {}",
        widgetUpdatedAt: "Updated {}",
        messageAuthorYou: "You",
        messagePhoto: "Photo",
        messageVideo: "Video",
        messageAnimation: "GIF",
        messageVoice: "Voice Message",
        messageVideoMessage: "Video Message",
        messageSticker: "Sticker",
        messageVoiceCall: "Call",
        messageVideoCall: "Video Call",
        messageLocation: "Map",
        autodeleteTimerUpdated: "Auto-delete timer updated",
        autodeleteTimerRemoved: "Auto-delete timer disabled",
        generalLockedTitle: "Locked",
        generalLockedText: "Open Telegram and enter passcode to edit widget.",
        chatSavedMessages: "Saved Messages"
    )
}

private func rootPathForBasePath(_ appGroupPath: String) -> String {
    return appGroupPath + "/telegram-data"
}

public func widgetPresentationDataPath(rootPath: String) -> String {
    return rootPath + "/widgetPresentationData.json"
}

public struct WidgetData: Codable, Equatable {
    public enum Content: Codable, Equatable {
        private enum CodingKeys: CodingKey {
            case discriminator
            case peers
        }
        
        private enum Cases: Int32, Codable {
            case empty
            case peers
        }
        
        case empty
        case peers(WidgetDataPeers)
        
        public init(from decoder: Decoder) throws {
            let container = try decoder.container(keyedBy: CodingKeys.self)
            let discriminator = try container.decode(Cases.self, forKey: .discriminator)
            switch discriminator {
            case .empty:
                self = .empty
            case .peers:
                self = .peers(try container.decode(WidgetDataPeers.self, forKey: .peers))
            }
        }
        
        public func encode(to encoder: Encoder) throws {
            var container = encoder.container(keyedBy: CodingKeys.self)
            switch self {
            case .empty:
                try container.encode(Cases.empty, forKey: .discriminator)
            case let .peers(peers):
                try container.encode(Cases.peers, forKey: .discriminator)
                try container.encode(peers, forKey: .peers)
            }
        }
    }
    
    public var accountId: Int64
    public var content: Content
    public var unlockedForLockId: String?
    
    public init(accountId: Int64, content: Content, unlockedForLockId: String?) {
        self.accountId = accountId
        self.content = content
        self.unlockedForLockId = unlockedForLockId
    }
}