// MyPass/Views/EntryListView.swift
import SwiftUI
import MyPassCore

struct EntryListView: View {
    @ObservedObject var vm: VaultViewModel
    @State private var isSearching = false
    @State private var showAddEntry = false

    var body: some View {
        List {
            ForEach(vm.displayedEntries) { flatEntry in
                NavigationLink(
                    destination: EntryDetailView(
                        entry: flatEntry.entry,
                        groupId: flatEntry.parentGroupId,
                        session: vm.session
                    )
                ) {
                    EntryRow(flatEntry: flatEntry)
                }
            }
            .onDelete { offsets in
                offsets.map { vm.displayedEntries[$0] }.forEach(vm.deleteEntry)
            }
        }
        .navigationTitle("MyPass")
        .searchable(text: $vm.searchQuery, isPresented: $isSearching, prompt: "Search entries…")
        .toolbar {
            ToolbarItem(placement: .primaryAction) {
                Button {
                    if isSearching { vm.searchQuery = "" }
                    isSearching.toggle()
                } label: {
                    Image(systemName: "magnifyingglass")
                }
            }
            ToolbarItem(placement: .primaryAction) {
                Button { showAddEntry = true } label: {
                    Image(systemName: "plus")
                }
            }
        }
        .sheet(isPresented: $showAddEntry) {
            EntryEditView(vm: EntryEditViewModel(session: vm.session, groupId: defaultGroupId))
        }
        .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 ?? "")
        }
    }

    /// The most recently toggled-on filter group, if any filter is still active via it,
    /// otherwise the vault root.
    private var defaultGroupId: UUID {
        vm.lastToggledGroupId ?? vm.session.database?.root.id ?? UUID()
    }
}

private struct EntryRow: View {
    let flatEntry: FlatEntry

    private var breadcrumbText: String? {
        guard !flatEntry.breadcrumb.isEmpty else { return nil }
        return flatEntry.breadcrumb.map(\.name).joined(separator: " > ")
    }

    var body: some View {
        HStack(alignment: .top, spacing: 12) {
            Image(systemName: KeePassIconMapper.symbolName(forIconIndex: flatEntry.entry.iconIndex))
                .foregroundStyle(.secondary)
                .frame(width: 24)
            VStack(alignment: .leading, spacing: 2) {
                Text(flatEntry.entry.title).font(.body)
                if let breadcrumbText {
                    Text("\(flatEntry.entry.username) · \(breadcrumbText)")
                        .font(.caption)
                        .foregroundStyle(.secondary)
                        .lineLimit(1)
                        .truncationMode(.middle)
                } else {
                    Text(flatEntry.entry.username)
                        .font(.caption)
                        .foregroundStyle(.secondary)
                }
            }
        }
    }
}