import SwiftUI

struct AddBookmarkView: View {
    @Bindable var viewModel: BookmarksViewModel
    @Environment(\.dismiss) private var dismiss

    @State private var url = ""
    @State private var title = ""
    @State private var tagsText = ""
    @State private var isSaving = false
    @State private var error: String?

    var body: some View {
        NavigationStack {
            Form {
                Section {
                    TextField("https://", text: $url)
                        .keyboardType(.URL)
                        .textInputAutocapitalization(.never)
                        .autocorrectionDisabled()
                } header: {
                    Text("URL")
                }

                Section {
                    TextField("Optional", text: $title)
                } header: {
                    Text("Title")
                }

                Section {
                    TextField("comma separated", text: $tagsText)
                        .textInputAutocapitalization(.never)
                        .autocorrectionDisabled()
                } header: {
                    Text("Tags")
                } footer: {
                    Text("Separate tags with commas")
                }

                if let error {
                    Section {
                        Text(error)
                            .foregroundStyle(.red)
                            .font(.footnote)
                    }
                }
            }
            .navigationTitle("Add Bookmark")
            .navigationBarTitleDisplayMode(.inline)
            .toolbar {
                ToolbarItem(placement: .cancellationAction) {
                    Button("Cancel") { dismiss() }
                }
                ToolbarItem(placement: .confirmationAction) {
                    Button("Save") { save() }
                        .disabled(url.trimmingCharacters(in: .whitespaces).isEmpty || isSaving)
                        .overlay {
                            if isSaving { ProgressView().scaleEffect(0.7) }
                        }
                }
            }
        }
    }

    private func save() {
        var urlString = url.trimmingCharacters(in: .whitespaces)
        if !urlString.hasPrefix("http://") && !urlString.hasPrefix("https://") {
            urlString = "https://" + urlString
        }
        guard URL(string: urlString) != nil else {
            error = "Invalid URL"
            return
        }
        let tags = tagsText.split(separator: ",").map { $0.trimmingCharacters(in: .whitespaces) }.filter { !$0.isEmpty }
        isSaving = true
        error = nil
        Task {
            do {
                try await viewModel.addBookmark(url: urlString, title: title.trimmingCharacters(in: .whitespaces), tags: tags)
                dismiss()
            } catch {
                self.error = error.localizedDescription
                isSaving = false
            }
        }
    }
}