//
//  DraftsView.swift
//  Tusker
//
//  Created by Shadowfacts on 11/9/22.
//  Copyright © 2022 Shadowfacts. All rights reserved.
//

import SwiftUI

@available(iOS, obsoleted: 16.0)
struct DraftsRepresentable: UIViewControllerRepresentable {
    typealias UIViewControllerType = UIHostingController<DraftsView>
    
    let currentDraft: OldDraft
    let mastodonController: MastodonController
    
    func makeUIViewController(context: Context) -> UIHostingController<DraftsView> {
        return UIHostingController(rootView: DraftsView(currentDraft: currentDraft, mastodonController: mastodonController))
    }
    
    func updateUIViewController(_ uiViewController: UIHostingController<DraftsView>, context: Context) {
    }
}

struct DraftsView: View {
    let currentDraft: OldDraft
    // don't pass this in via the environment b/c it crashes on macOS (at least, in Designed for iPad mode) since the environment doesn't get propagated through the modal popup window or something
    let mastodonController: MastodonController
    @EnvironmentObject var uiState: ComposeUIState
    @StateObject private var draftsManager = OldDraftsManager.shared
    @State private var draftForDifferentReply: OldDraft?
    
    private var visibleDrafts: [OldDraft] {
        draftsManager.sorted.filter {
            $0.accountID == mastodonController.accountInfo!.id && $0.id != currentDraft.id
        }
    }
    
    var body: some View {
//        NavigationView {
//            List {
//                ForEach(visibleDrafts) { draft in
//                    Button {
//                        maybeSelectDraft(draft)
//                    } label: {
//                        DraftView(draft: draft)
//                    }
//                    .contextMenu {
//                        Button(role: .destructive) {
//                            OldDraftsManager.remove(draft)
//                        } label: {
//                            Label("Delete Draft", systemImage: "trash")
//                        }
//                    }
//                    .onDrag {
//                        let activity = UserActivityManager.editDraftActivity(id: draft.id, accountID: mastodonController.accountInfo!.id)
//                        activity.displaysAuxiliaryScene = true
//                        return NSItemProvider(object: activity)
//                    }
//                }
//                .onDelete { indices in
//                    indices
//                        .map { visibleDrafts[$0] }
//                        .forEach { OldDraftsManager.remove($0) }
//                }
//                .appGroupedListRowBackground()
//            }
//            .listStyle(.plain)
//            .appGroupedListBackground(container: DraftsRepresentable.UIViewControllerType.self)
//            .navigationTitle(Text("Drafts"))
//            .navigationBarTitleDisplayMode(.inline)
//            .toolbar {
//                ToolbarItem(placement: .cancellationAction) {
//                    Button("Cancel") {
//                        uiState.isShowingDraftsList = false
//                    }
//                }
//            }
//        }
//        .alertWithData("Different Reply", data: $draftForDifferentReply) { draft in
//            Button("Cancel", role: .cancel) {
//                draftForDifferentReply = nil
//            }
//            Button("Restore Draft") {
//                uiState.delegate?.selectDraft(draft)
//            }
//        } message: { draft in
//            Text("The selected draft is a reply to a different post, do you wish to use it?")
//        }
        Text("drafts")
    }
    
    private func maybeSelectDraft(_ draft: OldDraft) {
        if draft.inReplyToID != currentDraft.inReplyToID,
           currentDraft.hasContent {
            draftForDifferentReply = draft
        } else {
            uiState.delegate?.selectDraft(draft)
        }
    }
}

struct DraftView: View {
    @ObservedObject private var draft: OldDraft
    
    init(draft: OldDraft) {
        self._draft = ObservedObject(wrappedValue: draft)
    }
    
    var body: some View {
        HStack {
            VStack(alignment: .leading) {
                if draft.contentWarningEnabled {
                    Text(draft.contentWarning)
                        .font(.body.bold())
                        .foregroundColor(.secondary)
                }
                
                Text(draft.text)
                    .font(.body)
                
                HStack(spacing: 8) {
                    ForEach(draft.attachments) { attachment in
                        ComposeAttachmentImage(attachment: attachment, fullSize: false)
                            .frame(width: 50, height: 50)
                            .cornerRadius(5)
                    }
                }
            }
            
            Spacer()
            
            Text(draft.lastModified.timeAgoString())
                .font(.body)
                .foregroundColor(.secondary)
        }
    }
}

//struct DraftsView_Previews: PreviewProvider {
//    static var previews: some View {
//        DraftsView(currentDraft: Draft(accountID: ""))
//    }
//}