import Foundation
import XuqmSDK

@MainActor
final class ConversationViewModel: ObservableObject {
    @Published var conversations: [ConversationData] = []
    @Published var state: ConversationLoadState = .idle
    @Published var query: String = ""
    @Published var totalUnreadCount: Int = 0

    var filteredConversations: [ConversationData] {
        if query.isEmpty { return conversations }
        let keyword = query.trimmingCharacters(in: .whitespaces)
        return conversations.filter {
            $0.targetId.localizedCaseInsensitiveContains(keyword)
                || conversationPreview($0).localizedCaseInsensitiveContains(keyword)
        }
    }

    func load() {
        state = .loading
        Task {
            do {
                conversations = try await ImSDK.shared.listConversations()
                totalUnreadCount = conversations.reduce(0) { $0 + $1.unreadCount }
                state = .loaded
            } catch {
                state = .error(error.localizedDescription)
            }
        }
    }

    func refresh() {
        Task {
            do {
                conversations = try await ImSDK.shared.listConversations()
                totalUnreadCount = conversations.reduce(0) { $0 + $1.unreadCount }
            } catch {
                state = .error(error.localizedDescription)
            }
        }
    }

    func deleteConversation(_ conversation: ConversationData) {
        Task {
            do {
                try await ImSDK.shared.deleteConversation(targetId: conversation.targetId, chatType: conversation.chatType)
                await refresh()
            } catch {
                state = .error(error.localizedDescription)
            }
        }
    }

    func togglePinned(_ conversation: ConversationData) {
        Task {
            do {
                try await ImSDK.shared.setConversationPinned(targetId: conversation.targetId, chatType: conversation.chatType, pinned: !conversation.isPinned)
                await refresh()
            } catch {
                state = .error(error.localizedDescription)
            }
        }
    }

    func toggleMuted(_ conversation: ConversationData) {
        Task {
            do {
                try await ImSDK.shared.setConversationMuted(targetId: conversation.targetId, chatType: conversation.chatType, muted: !conversation.isMuted)
                await refresh()
            } catch {
                state = .error(error.localizedDescription)
            }
        }
    }
}