import SwiftUI

struct ContactsPickerView: View {
    @Environment(\.router) var router
    @EnvironmentObject var messages: MessagesStore

    @State private var rosters: [Roster] = []
    @State private var selectedContact: Roster?

    var body: some View {
        VStack(spacing: 0) {
            // Contacts list
            if !rosters.isEmpty {
                List {
                    ForEach(rosters) { roster in
                        ContactRow(roster: roster, selectedContact: $selectedContact)
                    }
                }
                .listStyle(.plain)
                .background(Color.Material.Background.light)
            } else {
                Spacer()
            }

            // Send panel
            Rectangle()
                .foregroundColor(.Material.Shape.black)
                .frame(maxWidth: .infinity)
                .frame(height: selectedContact == nil ? 0 : 50)
                .overlay {
                    HStack {
                        Text(L10n.Attachment.Send.contact)
                            .foregroundColor(.Material.Text.white)
                            .font(.body1)
                        Image(systemName: "arrow.up.circle")
                            .foregroundColor(.Material.Text.white)
                            .font(.body1)
                            .padding(.leading, 8)
                    }
                    .padding()
                }
                .clipped()
                .onTapGesture {
                    if let selectedContact = selectedContact {
                        messages.sendContact(selectedContact.contactBareJid)
                        router.dismissEnvironment()
                    }
                }
        }
        .task {
            rosters = await Roster.allActive
        }
    }
}

private struct ContactRow: View {
    var roster: Roster
    @Binding var selectedContact: Roster?

    var body: some View {
        SharedListRow(
            iconType: .charCircle(roster.name?.firstLetter ?? roster.contactBareJid.firstLetter),
            text: roster.contactBareJid
        )
        .onTapGesture {
            selectedContact = roster
        }
    }
}