Accessibility with VoiceOver support

import SwiftUI

struct AccessiblePostCard: View {
    let post: Post
    @State private var isLiked = false

    var body: some View {
        VStack(alignment: .leading, spacing: 12) {
            Text(post.title)
                .font(.headline)

            Text(post.body)
                .font(.body)
                .lineLimit(3)

            HStack {
                Button(action: toggleLike) {
                    Image(systemName: isLiked ? "heart.fill" : "heart")
                        .foregroundColor(isLiked ? .red : .gray)
                }
                .accessibilityLabel(isLiked ? "Unlike post" : "Like post")
                .accessibilityHint("Double tap to \(isLiked ? "remove" : "add") like")

                Text("\(post.likesCount) likes")
                    .accessibilityHidden(true) // Included in button label

                Spacer()

                Text(post.createdAt, style: .relative)
                    .font(.caption)
                    .accessibilityLabel("Posted \(post.createdAt, style: .relative)")
            }
        }
        .padding()
        .background(Color.white)
        .cornerRadius(12)
        .shadow(radius: 2)
        .accessibilityElement(children: .contain)
        .accessibilityLabel("Post by \(post.author.name)")
        .accessibilityValue(post.title)
    }

    private func toggleLike() {
        isLiked.toggle()

        // Announce change to VoiceOver
        UIAccessibility.post(
            notification: .announcement,
            argument: isLiked ? "Post liked" : "Post unliked"
        )
    }
}

struct AccessibleFormView: View {
    @State private var username = ""
    @State private var email = ""
    @State private var agreedToTerms = false
    @Environment(\.accessibilityReduceMotion) var reduceMotion

    var body: some View {
        Form {
            Section {
                TextField("Username", text: $username)
                    .accessibilityLabel("Username")
                    .accessibilityHint("Enter your username")

                TextField("Email", text: $email)
                    .keyboardType(.emailAddress)
                    .accessibilityLabel("Email address")
                    .accessibilityHint("Enter your email address")
            }

            Section {
                Toggle(isOn: $agreedToTerms) {
                    Text("I agree to the terms and conditions")
                }
                .accessibilityLabel("Agree to terms")
                .accessibilityValue(agreedToTerms ? "Agreed" : "Not agreed")
            }

            Section {
                Button("Submit") {
                    submitForm()
                }
                .disabled(username.isEmpty || email.isEmpty || !agreedToTerms)
                .accessibilityLabel("Submit form")
                .accessibilityHint(formIsValid ? "Double tap to submit" : "Complete all fields to enable")
            }
        }
        .navigationTitle("Sign Up")
    }

    private var formIsValid: Bool {
        !username.isEmpty && !email.isEmpty && agreedToTerms
    }

    private func submitForm() {
        // Submit logic
        UIAccessibility.post(
            notification: .announcement,
            argument: "Form submitted successfully"
        )
    }
}

struct DynamicTypeExample: View {
    @Environment(\.sizeCategory) var sizeCategory

    var body: some View {
        VStack(alignment: .leading, spacing: 16) {
            Text("Title")
                .font(.title)

            Text("This text automatically scales with user's Dynamic Type settings")
                .font(.body)

            // Custom scaling
            Text("Custom scaled text")
                .font(.system(size: scaledSize))
        }
        .padding()
    }

    private var scaledSize: CGFloat {
        switch sizeCategory {
        case .extraSmall, .small, .medium:
            return 14
        case .large, .extraLarge:
            return 16
        case .extraExtraLarge, .extraExtraExtraLarge:
            return 18
        default:
            return 20
        }
    }
}