//
//  GroupBrowserView.swift
//  MyPass
//

import SwiftUI
import MyPassCore

struct GroupBrowserView: View {
    @ObservedObject var vm: VaultViewModel
    let group: MyPassCore.Group

    @State private var selectedEntry: Entry?
    @State private var showAddEntry = false

    var body: some View {
        List {
            if vm.isSearching {
                searchResultsSection
            } else {
                groupTreeSection
            }
        }
        .navigationTitle(group.name)
        .searchable(text: $vm.searchQuery, prompt: "Search all entries…")
        .toolbar {
            #if os(iOS)
            ToolbarItem(placement: .navigationBarTrailing) { EditButton() }
            #endif
            ToolbarItem(placement: .primaryAction) {
                Button { showAddEntry = true } label: {
                    Image(systemName: "plus")
                }
            }
        }
        .sheet(isPresented: $showAddEntry) {
            let editVM = EntryEditViewModel(session: vm.session, groupId: group.id)
            EntryEditView(vm: editVM)
        }
        .alert("Error", isPresented: Binding(
            get: { vm.errorMessage != nil },
            set: { if !$0 { vm.errorMessage = nil } }
        )) {
            Button("OK", role: .cancel) { vm.errorMessage = nil }
        } message: {
            Text(vm.errorMessage ?? "")
        }
    }

    @ViewBuilder
    private var searchResultsSection: some View {
        ForEach(vm.filteredEntries) { entry in
            NavigationLink(destination: EntryDetailView(entry: entry, session: vm.session)) {
                EntryRow(entry: entry)
            }
        }
    }

    @ViewBuilder
    private var groupTreeSection: some View {
        if !group.subgroups.isEmpty {
            Section("Groups") {
                ForEach(group.subgroups) { sub in
                    NavigationLink(destination: GroupBrowserView(vm: vm, group: sub)) {
                        Label(sub.name, systemImage: "folder")
                    }
                }
            }
        }
        if !group.entries.isEmpty {
            Section("Entries") {
                ForEach(group.entries) { entry in
                    NavigationLink(destination: EntryDetailView(entry: entry, session: vm.session)) {
                        EntryRow(entry: entry)
                    }
                }
                .onDelete { offsets in
                    offsets.map { group.entries[$0] }.forEach { vm.deleteEntry($0, fromGroup: group) }
                }
            }
        }
    }
}

private struct EntryRow: View {
    let entry: Entry
    var body: some View {
        VStack(alignment: .leading, spacing: 2) {
            Text(entry.title).font(.body)
            Text(entry.username).font(.caption).foregroundStyle(.secondary)
        }
    }
}