BusinessCard/BusinessCard/Views/ShareCardView.swift

import SwiftUI
import Bedrock
import SwiftData

struct ShareCardView: View {
    @Environment(AppState.self) private var appState
    @State private var showingWalletAlert = false
    @State private var showingNfcAlert = false
    @State private var showingContactSheet = false
    @State private var recipientName = ""
    @State private var recipientRole = ""
    @State private var recipientCompany = ""

    var body: some View {
        NavigationStack {
            ScrollView {
                VStack(spacing: Design.Spacing.large) {
                    Text("Share with anyone")
                        .font(.title2)
                        .bold()
                        .foregroundStyle(Color.Text.primary)

                    if let card = appState.cardStore.selectedCard {
                        QRCodeCardView(card: card)
                        ShareOptionsView(
                            card: card,
                            shareLinkService: appState.shareLinkService,
                            showWallet: { showingWalletAlert = true },
                            showNfc: { showingNfcAlert = true }
                        )
                        TrackShareButton { showingContactSheet = true }
                    } else {
                        EmptyStateView(
                            title: String.localized("No card selected"),
                            message: String.localized("Choose a card in the My Cards tab to start sharing.")
                        )
                    }
                }
                .padding(.horizontal, Design.Spacing.large)
                .padding(.vertical, Design.Spacing.xLarge)
            }
            .background(Color.AppBackground.base)
            .navigationTitle(String.localized("Send Work Card"))
            .alert(String.localized("Apple Wallet"), isPresented: $showingWalletAlert) {
                Button(String.localized("OK")) { }
            } message: {
                Text("Wallet export is coming soon. We'll let you know as soon as it's ready.")
            }
            .alert(String.localized("NFC Sharing"), isPresented: $showingNfcAlert) {
                Button(String.localized("OK")) { }
            } message: {
                Text("Hold your phone near another device to share instantly. NFC setup is on the way.")
            }
            .sheet(isPresented: $showingContactSheet) {
                RecordContactSheet(
                    recipientName: $recipientName,
                    recipientRole: $recipientRole,
                    recipientCompany: $recipientCompany
                ) {
                    saveContact()
                }
            }
        }
    }
    
    private func saveContact() {
        guard !recipientName.isEmpty, let card = appState.cardStore.selectedCard else { return }
        appState.contactsStore.recordShare(
            for: recipientName,
            role: recipientRole,
            company: recipientCompany,
            cardLabel: card.label
        )
        recipientName = ""
        recipientRole = ""
        recipientCompany = ""
    }
}

// MARK: - QR Code Display

private struct QRCodeCardView: View {
    let card: BusinessCard
    
    private var textColor: Color { card.theme.textColor }

    var body: some View {
        VStack(spacing: Design.Spacing.medium) {
            QRCodeView(payload: card.vCardPayload)
                .frame(width: Design.CardSize.qrSize, height: Design.CardSize.qrSize)
                .padding(Design.Spacing.medium)
                .background(Color.AppBackground.elevated)
                .clipShape(.rect(cornerRadius: Design.CornerRadius.large))

            Text("Point your camera at the QR code to receive the card")
                .font(.subheadline)
                .foregroundStyle(textColor.opacity(Design.Opacity.strong))
                .multilineTextAlignment(.center)
        }
        .padding(Design.Spacing.large)
        .background(card.theme.primaryColor)
        .clipShape(.rect(cornerRadius: Design.CornerRadius.xLarge))
        .shadow(
            color: Color.Text.secondary.opacity(Design.Opacity.hint),
            radius: Design.Shadow.radiusLarge,
            x: Design.Shadow.offsetNone,
            y: Design.Shadow.offsetSmall
        )
    }
}

// MARK: - Share Options

private struct ShareOptionsView: View {
    let card: BusinessCard
    let shareLinkService: ShareLinkProviding
    let showWallet: () -> Void
    let showNfc: () -> Void

    var body: some View {
        VStack(spacing: Design.Spacing.small) {
            ShareOptionRow.share(
                title: String.localized("Copy link"),
                systemImage: "link",
                item: shareLinkService.shareURL(for: card)
            )
            ShareOptionRow.link(
                title: String.localized("Text your card"),
                systemImage: "message",
                url: shareLinkService.smsURL(for: card)
            )
            ShareOptionRow.link(
                title: String.localized("Email your card"),
                systemImage: "envelope",
                url: shareLinkService.emailURL(for: card)
            )
            ShareOptionRow.link(
                title: String.localized("Send via WhatsApp"),
                systemImage: "message.fill",
                url: shareLinkService.whatsappURL(for: card)
            )
            ShareOptionRow.link(
                title: String.localized("Send via LinkedIn"),
                systemImage: "link.circle",
                url: shareLinkService.linkedInURL(for: card)
            )
            ShareOptionRow.action(
                title: String.localized("Add to Apple Wallet"),
                systemImage: "wallet.pass",
                action: showWallet
            )
            ShareOptionRow.action(
                title: String.localized("Share via NFC"),
                systemImage: "dot.radiowaves.left.and.right",
                action: showNfc
            )
        }
        .padding(Design.Spacing.large)
        .background(Color.AppBackground.elevated)
        .clipShape(.rect(cornerRadius: Design.CornerRadius.large))
    }
}

// MARK: - Track Button

private struct TrackShareButton: View {
    let action: () -> Void
    
    var body: some View {
        Button(action: action) {
            ActionRowContent(
                title: String.localized("Track this share"),
                subtitle: String.localized("Record who received your card"),
                systemImage: "person.badge.plus"
            )
        }
        .buttonStyle(.plain)
        .accessibilityHint(String.localized("Opens a form to record who you shared your card with"))
    }
}

// MARK: - Share Option Row

private enum ShareOptionRow {
    static func link(title: String, systemImage: String, url: URL) -> some View {
        Link(destination: url) {
            RowContent(title: title, systemImage: systemImage)
        }
        .buttonStyle(.plain)
    }
    
    static func share(title: String, systemImage: String, item: URL) -> some View {
        ShareLink(item: item) {
            RowContent(title: title, systemImage: systemImage)
        }
        .buttonStyle(.plain)
    }
    
    static func action(title: String, systemImage: String, action: @escaping () -> Void) -> some View {
        Button(action: action) {
            RowContent(title: title, systemImage: systemImage)
        }
        .buttonStyle(.plain)
    }
}

private struct RowContent: View {
    let title: String
    let systemImage: String

    var body: some View {
        HStack(spacing: Design.Spacing.medium) {
            Image(systemName: systemImage)
                .foregroundStyle(Color.Accent.red)
                .frame(width: Design.CardSize.avatarSize, height: Design.CardSize.avatarSize)
                .background(Color.AppBackground.accent)
                .clipShape(.rect(cornerRadius: Design.CornerRadius.medium))
            Text(title)
                .foregroundStyle(Color.Text.primary)
            Spacer()
            Image(systemName: "chevron.right")
                .foregroundStyle(Color.Text.secondary)
        }
        .padding(.horizontal, Design.Spacing.medium)
        .padding(.vertical, Design.Spacing.small)
        .background(Color.AppBackground.base)
        .clipShape(.rect(cornerRadius: Design.CornerRadius.medium))
    }
}

// MARK: - Preview

#Preview {
    ShareCardView()
        .environment(AppState(modelContext: try! ModelContainer(for: BusinessCard.self, Contact.self).mainContext))
}