SimpleX-Chat/apps/ios/Shared/Views/Chat/Group/GroupWelcomeView.swift

//
//  GroupWelcomeView.swift
//  SimpleX (iOS)
//
//  Created by Avently on 21/03/2022.
//  Copyright © 2023 SimpleX Chat. All rights reserved.
//

import SwiftUI
import SimpleXChat

struct GroupWelcomeView: View {
    @Environment(\.dismiss) var dismiss: DismissAction
    @EnvironmentObject private var m: ChatModel
    var groupId: Int64
    @Binding var groupInfo: GroupInfo
    @State private var welcomeText: String = ""
    @FocusState private var keyboardVisible: Bool
    @State private var showSaveDialog = false

    var body: some View {
        List {
            Section {
                TextEditor(text: $welcomeText)
                .focused($keyboardVisible)
                .padding(.horizontal, -5)
                .padding(.top, -8)
                .frame(height: 90, alignment: .topLeading)
                .frame(maxWidth: .infinity, alignment: .leading)
            }
            Section {
                saveButton()
            }
        }
        .onAppear {
            welcomeText = groupInfo.groupProfile.description ?? ""
        }
        .modifier(BackButton {
            if welcomeText == groupInfo.groupProfile.description || (welcomeText == "" && groupInfo.groupProfile.description == nil) {
                dismiss()
            } else {
                showSaveDialog = true
            }
        })
        .confirmationDialog("Save welcome message?", isPresented: $showSaveDialog) {
            Button("Save and update group profile") {
                save()
                dismiss()
            }
            Button("Exit without saving") { dismiss() }
        }
    }

    @ViewBuilder private func saveButton() -> some View {
        Button("Save and update group profile") {
            save()
        }
        .disabled(welcomeText == groupInfo.groupProfile.description || (welcomeText == "" && groupInfo.groupProfile.description == nil))
    }

    private func save() {
        Task {
            do {
                var welcome: String? = welcomeText.trimmingCharacters(in: .whitespacesAndNewlines)
                if welcome?.count == 0 {
                    welcome = nil
                }
                var groupProfileUpdated = groupInfo.groupProfile
                groupProfileUpdated.description = welcome
                groupInfo = try await apiUpdateGroup(groupId, groupProfileUpdated)
                m.updateGroup(groupInfo)
                welcomeText = welcome ?? ""
            } catch let error {
                logger.error("apiUpdateGroup error: \(responseError(error))")
            }
        }
    }
}

struct GroupWelcomeView_Previews: PreviewProvider {
    static var previews: some View {
        GroupWelcomeView(groupId: 1, groupInfo: Binding.constant(GroupInfo.sampleData))
    }
}