import Foundation
import Postbox
import TelegramCore
import SyncCore
import TelegramPresentationData
import TelegramUIPreferences
import TelegramStringFormatting
import LocalizedPeerData

public func chatListItemStrings(strings: PresentationStrings, nameDisplayOrder: PresentationPersonNameOrder, message: Message?, chatPeer: RenderedPeer, accountPeerId: PeerId, enableMediaEmoji: Bool = true, isPeerGroup: Bool = false) -> (peer: Peer?, hideAuthor: Bool, messageText: String) {
    let peer: Peer?
    
    var hideAuthor = false
    var messageText: String
    if let message = message {
        if let messageMain = messageMainPeer(message) {
            peer = messageMain
        } else {
            peer = chatPeer.chatMainPeer
        }
        
        messageText = message.text
        
        for media in message.media {
            switch media {
                case _ as TelegramMediaImage:
                    if message.text.isEmpty {
                        messageText = strings.Message_Photo
                    } else if #available(iOSApplicationExtension 9.0, iOS 9.0, *) {
                        if enableMediaEmoji {
                            messageText = "🖼 \(messageText)"
                        }
                    }
                case let fileMedia as TelegramMediaFile:
                    var processed = false
                    inner: for attribute in fileMedia.attributes {
                        switch attribute {
                            case .Animated:
                                messageText = strings.Message_Animation
                                processed = true
                                break inner
                            case let .Audio(isVoice, _, title, performer, _):
                                if !message.text.isEmpty {
                                    messageText = "🎤 \(messageText)"
                                } else if isVoice {
                                    if message.text.isEmpty {
                                        messageText = strings.Message_Audio
                                    } else {
                                        messageText = "🎤 \(messageText)"
                                    }
                                    processed = true
                                    break inner
                                } else {
                                    let descriptionString: String
                                    if let title = title, let performer = performer, !title.isEmpty, !performer.isEmpty {
                                        descriptionString = title + " — " + performer
                                    } else if let title = title, !title.isEmpty {
                                        descriptionString = title
                                    } else if let performer = performer, !performer.isEmpty {
                                        descriptionString = performer
                                    } else if let fileName = fileMedia.fileName {
                                        descriptionString = fileName
                                    } else {
                                        descriptionString = strings.Message_Audio
                                    }
                                    messageText = descriptionString
                                    processed = true
                                    break inner
                                }
                            case let .Sticker(displayText, _, _):
                                if displayText.isEmpty {
                                    messageText = strings.Message_Sticker
                                    processed = true
                                    break inner
                                } else {
                                    messageText = strings.Message_StickerText(displayText).0
                                    processed = true
                                    break inner
                                }
                            case let .Video(_, _, flags):
                                if flags.contains(.instantRoundVideo) {
                                    messageText = strings.Message_VideoMessage
                                    processed = true
                                    break inner
                                } else {
                                    if message.text.isEmpty {
                                        messageText = strings.Message_Video
                                        processed = true
                                    } else if #available(iOSApplicationExtension 9.0, iOS 9.0, *) {
                                        if !fileMedia.isAnimated && enableMediaEmoji {
                                            messageText = "📹 \(messageText)"
                                            processed = true
                                        }
                                        break inner
                                    }
                                }
                            default:
                                break
                        }
                    }
                    if !processed {
                        if !message.text.isEmpty {
                            messageText = "📎 \(messageText)"
                        } else {
                            if fileMedia.isAnimatedSticker {
                                messageText = strings.Message_Sticker
                            } else {
                                if let fileName = fileMedia.fileName {
                                    messageText = fileName
                                } else {
                                    messageText = strings.Message_File
                                }
                            }
                        }
                    }
                case let location as TelegramMediaMap:
                    if location.liveBroadcastingTimeout != nil {
                        messageText = strings.Message_LiveLocation
                    } else {
                        messageText = strings.Message_Location
                    }
                case _ as TelegramMediaContact:
                    messageText = strings.Message_Contact
                case let game as TelegramMediaGame:
                    messageText = "🎮 \(game.title)"
                case let invoice as TelegramMediaInvoice:
                    messageText = invoice.title
                case let action as TelegramMediaAction:
                    switch action.action {
                        case let .phoneCall(_, discardReason, _):
                            hideAuthor = !isPeerGroup
                            let incoming = message.flags.contains(.Incoming)
                            if let discardReason = discardReason {
                                switch discardReason {
                                    case .busy, .disconnect:
                                        messageText = strings.Notification_CallCanceled
                                    case .missed:
                                        messageText = incoming ? strings.Notification_CallMissed : strings.Notification_CallCanceled
                                    case .hangup:
                                        break
                                }
                            }
                            
                            if messageText.isEmpty {
                                if incoming {
                                    messageText = strings.Notification_CallIncoming
                                } else {
                                    messageText = strings.Notification_CallOutgoing
                                }
                            }
                        default:
                            hideAuthor = true
                            if let text = plainServiceMessageString(strings: strings, nameDisplayOrder: nameDisplayOrder, message: message, accountPeerId: accountPeerId) {
                                messageText = text
                            }
                    }
                case _ as TelegramMediaExpiredContent:
                    if let text = plainServiceMessageString(strings: strings, nameDisplayOrder: nameDisplayOrder, message: message, accountPeerId: accountPeerId) {
                        messageText = text
                    }
                case let poll as TelegramMediaPoll:
                    messageText = "📊 \(poll.text)"
                default:
                    break
            }
        }
    } else {
        peer = chatPeer.chatMainPeer
        messageText = ""
        if chatPeer.peerId.namespace == Namespaces.Peer.SecretChat {
            if let secretChat = chatPeer.peers[chatPeer.peerId] as? TelegramSecretChat {
                switch secretChat.embeddedState {
                    case .active:
                        switch secretChat.role {
                            case .creator:
                                messageText = strings.DialogList_EncryptedChatStartedOutgoing(peer?.compactDisplayTitle ?? "").0
                            case .participant:
                                messageText = strings.DialogList_EncryptedChatStartedIncoming(peer?.compactDisplayTitle ?? "").0
                        }
                    case .terminated:
                        messageText = strings.DialogList_EncryptionRejected
                    case .handshake:
                        switch secretChat.role {
                            case .creator:
                                messageText = strings.DialogList_AwaitingEncryption(peer?.compactDisplayTitle ?? "").0
                            case .participant:
                                messageText = strings.DialogList_EncryptionProcessing
                        }
                }
            }
        }
    }
    
    return (peer, hideAuthor, messageText)
}