import SwiftUI

enum AttachmentTab: Int, CaseIterable {
    case media
    case files
    case location
    case contacts
}

struct AttachmentTabBar: View {
    @Binding var selectedTab: AttachmentTab

    var body: some View {
        VStack(spacing: 0) {
            Rectangle()
                .frame(maxWidth: .infinity)
                .frame(height: 0.2)
                .foregroundColor(.Main.separator)
            HStack(spacing: 0) {
                AttachmentTabBarButton(tab: .media, selected: $selectedTab)
                AttachmentTabBarButton(tab: .files, selected: $selectedTab)
                AttachmentTabBarButton(tab: .location, selected: $selectedTab)
                AttachmentTabBarButton(tab: .contacts, selected: $selectedTab)
            }
            .background(Color.Main.backgroundDark)
        }
        .frame(height: 50)
    }
}

private struct AttachmentTabBarButton: View {
    let tab: AttachmentTab
    @Binding var selected: AttachmentTab

    var body: some View {
        ZStack {
            VStack(spacing: 2) {
                buttonImg
                    .foregroundColor(selected == tab ? .Material.greenDark500 : .Main.gray)
                    .font(.system(size: 24, weight: .light))
                    .symbolRenderingMode(.hierarchical)
                Text(buttonTitle)
                    .font(.sub1)
                    .foregroundColor(selected == tab ? .Main.black : .Main.gray)
            }
            Rectangle()
                .foregroundColor(.white.opacity(0.01))
                .onTapGesture {
                    selected = tab
                }
        }
    }

    var buttonImg: Image {
        switch tab {
        case .media:
            return Image(systemName: "photo.on.rectangle.angled")

        case .files:
            return Image(systemName: "doc.on.doc")

        case .location:
            return Image(systemName: "location.circle")

        case .contacts:
            return Image(systemName: "person.crop.circle")
        }
    }

    var buttonTitle: String {
        switch tab {
        case .media:
            return L10n.Attachment.Tab.media

        case .files:
            return L10n.Attachment.Tab.files

        case .location:
            return L10n.Attachment.Tab.location

        case .contacts:
            return L10n.Attachment.Tab.contacts
        }
    }
}