BusinessCard/BusinessCard/Views/ShareCardView.swift

import SwiftUI
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 },
                            onShareAction: { showingContactSheet = true }
                        )
                        
                        TrackContactButton {
                            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
                ) {
                    if !recipientName.isEmpty, let card = appState.cardStore.selectedCard {
                        appState.contactsStore.recordShare(
                            for: recipientName,
                            role: recipientRole,
                            company: recipientCompany,
                            cardLabel: card.label
                        )
                        recipientName = ""
                        recipientRole = ""
                        recipientCompany = ""
                    }
                }
            }
        }
    }
}

private struct TrackContactButton: View {
    let action: () -> Void
    
    var body: some View {
        Button(action: action) {
            HStack(spacing: Design.Spacing.medium) {
                Image(systemName: "person.badge.plus")
                    .foregroundStyle(Color.Accent.red)
                    .frame(width: Design.Size.avatarSize, height: Design.Size.avatarSize)
                    .background(Color.AppBackground.accent)
                    .clipShape(.rect(cornerRadius: Design.CornerRadius.medium))
                
                VStack(alignment: .leading, spacing: Design.Spacing.xxSmall) {
                    Text("Track this share")
                        .font(.headline)
                        .foregroundStyle(Color.Text.primary)
                    Text("Record who received your card")
                        .font(.subheadline)
                        .foregroundStyle(Color.Text.secondary)
                }
                
                Spacer()
                
                Image(systemName: "chevron.right")
                    .foregroundStyle(Color.Text.secondary)
            }
            .padding(Design.Spacing.large)
            .background(Color.AppBackground.elevated)
            .clipShape(.rect(cornerRadius: Design.CornerRadius.large))
        }
        .buttonStyle(.plain)
        .accessibilityHint(String.localized("Opens a form to record who you shared your card with"))
    }
}

private struct RecordContactSheet: View {
    @Environment(\.dismiss) private var dismiss
    @Binding var recipientName: String
    @Binding var recipientRole: String
    @Binding var recipientCompany: String
    let onSave: () -> Void
    
    private var isValid: Bool {
        !recipientName.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
    }
    
    var body: some View {
        NavigationStack {
            Form {
                Section(String.localized("Recipient Details")) {
                    TextField(String.localized("Name"), text: $recipientName)
                        .textContentType(.name)
                    
                    TextField(String.localized("Role (optional)"), text: $recipientRole)
                        .textContentType(.jobTitle)
                    
                    TextField(String.localized("Company (optional)"), text: $recipientCompany)
                        .textContentType(.organizationName)
                }
                
                Section {
                    Text("This person will appear in your Contacts tab so you can track who has your card.")
                        .font(.footnote)
                        .foregroundStyle(Color.Text.secondary)
                }
            }
            .navigationTitle(String.localized("Track Share"))
            .navigationBarTitleDisplayMode(.inline)
            .toolbar {
                ToolbarItem(placement: .cancellationAction) {
                    Button(String.localized("Cancel")) {
                        dismiss()
                    }
                }
                
                ToolbarItem(placement: .confirmationAction) {
                    Button(String.localized("Save")) {
                        onSave()
                        dismiss()
                    }
                    .disabled(!isValid)
                }
            }
        }
        .presentationDetents([.medium])
    }
}

private struct QRCodeCardView: View {
    let card: BusinessCard

    var body: some View {
        VStack(spacing: Design.Spacing.medium) {
            QRCodeView(payload: card.vCardPayload)
                .frame(width: Design.Size.qrSize, height: Design.Size.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(Color.Text.secondary)
                .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
        )
    }
}

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

    var body: some View {
        VStack(spacing: Design.Spacing.small) {
            ShareOptionShareRow(
                title: String.localized("Copy link"),
                systemImage: "link",
                item: shareLinkService.shareURL(for: card)
            )

            ShareOptionLinkRow(
                title: String.localized("Text your card"),
                systemImage: "message",
                url: shareLinkService.smsURL(for: card)
            )

            ShareOptionLinkRow(
                title: String.localized("Email your card"),
                systemImage: "envelope",
                url: shareLinkService.emailURL(for: card)
            )

            ShareOptionLinkRow(
                title: String.localized("Send via WhatsApp"),
                systemImage: "message.fill",
                url: shareLinkService.whatsappURL(for: card)
            )

            ShareOptionLinkRow(
                title: String.localized("Send via LinkedIn"),
                systemImage: "link.circle",
                url: shareLinkService.linkedInURL(for: card)
            )

            ShareOptionActionRow(
                title: String.localized("Add to Apple Wallet"),
                systemImage: "wallet.pass",
                action: showWallet
            )

            ShareOptionActionRow(
                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))
    }
}

private struct ShareOptionLinkRow: View {
    let title: String
    let systemImage: String
    let url: URL

    var body: some View {
        Link(destination: url) {
            HStack(spacing: Design.Spacing.medium) {
                ShareRowIcon(systemImage: systemImage)
                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))
        }
        .buttonStyle(.plain)
    }
}

private struct ShareOptionShareRow: View {
    let title: String
    let systemImage: String
    let item: URL

    var body: some View {
        ShareLink(item: item) {
            HStack(spacing: Design.Spacing.medium) {
                ShareRowIcon(systemImage: systemImage)
                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))
        }
        .buttonStyle(.plain)
    }
}

private struct ShareOptionActionRow: View {
    let title: String
    let systemImage: String
    let action: () -> Void

    var body: some View {
        Button(action: action) {
            HStack(spacing: Design.Spacing.medium) {
                ShareRowIcon(systemImage: systemImage)
                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))
        }
        .buttonStyle(.plain)
    }
}

private struct ShareRowIcon: View {
    let systemImage: String

    var body: some View {
        Image(systemName: systemImage)
            .foregroundStyle(Color.Accent.red)
            .frame(width: Design.Size.avatarSize, height: Design.Size.avatarSize)
            .background(Color.AppBackground.accent)
            .clipShape(.rect(cornerRadius: Design.CornerRadius.medium))
    }
}

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