import Foundation
import GRDB
import Martin

final class ClientMartinChatsManager: Martin.ChatManager {
    func chats(for context: Martin.Context) -> [any Martin.ChatProtocol] {
        do {
            let chats: [Chat] = try Database.shared.dbQueue.read { db in
                try Chat.filter(Column("account") == context.userBareJid.stringValue).fetchAll(db)
            }
            return chats.map { chat in
                Martin.ChatBase(context: context, jid: BareJID(chat.participant))
            }
        } catch {
            logIt(.error, "Error fetching chats: \(error.localizedDescription)")
            return []
        }
    }

    func chat(for context: Martin.Context, with: Martin.BareJID) -> (any Martin.ChatProtocol)? {
        do {
            let chat: Chat? = try Database.shared.dbQueue.read { db in
                try Chat
                    .filter(Column("account") == context.userBareJid.stringValue)
                    .filter(Column("participant") == with.stringValue)
                    .fetchOne(db)
            }
            if chat != nil {
                return Martin.ChatBase(context: context, jid: with)
            } else {
                return nil
            }
        } catch {
            logIt(.error, "Error fetching chat: \(error.localizedDescription)")
            return nil
        }
    }

    func createChat(for context: Martin.Context, with: Martin.BareJID) -> (any Martin.ChatProtocol)? {
        do {
            let chat: Chat? = try Database.shared.dbQueue.read { db in
                try Chat
                    .filter(Column("account") == context.userBareJid.stringValue)
                    .filter(Column("participant") == with.stringValue)
                    .fetchOne(db)
            }
            if chat != nil {
                return Martin.ChatBase(context: context, jid: with)
            } else {
                let chat = Chat(
                    id: UUID().uuidString,
                    account: context.userBareJid.stringValue,
                    participant: with.stringValue,
                    type: .chat
                )
                try Database.shared.dbQueue.write { db in
                    try chat.save(db)
                }
                return Martin.ChatBase(context: context, jid: with)
            }
        } catch {
            logIt(.error, "Error fetching chat: \(error.localizedDescription)")
            return nil
        }
    }

    func close(chat: any Martin.ChatProtocol) -> Bool {
        // not used in Martin library for now
        print("Closing chat: \(chat)")
        return false
    }

    func initialize(context _: Martin.Context) {}
    func deinitialize(context _: Martin.Context) {}
}