//
//  RecordingView.swift
//  voicekeyboard
//
//  Informational view shown when app is launched via voicekeyboard://record
//  Pure UI component - business logic handled in voicekeyboardApp.handleRecognitionRequest
//

import SwiftUI

struct RecordingView: View {
    @State private var animationOffset: CGFloat = -50
    @State private var animationOpacity: Double = 0

    private var bottomInset: CGFloat {
        if let keyWindow = UIApplication.shared.keyWindow {
            return keyWindow.safeAreaInsets.bottom
        } else {
            return 0
        }
    }

    // Detect if device has home button (iPhone SE, older models)
    private var hasHomeButton: Bool {
        return bottomInset == 0
    }

    var body: some View {
        ZStack {
            VStack(spacing: 24) {
                Image("AppIcon")
                    .resizable()
                    .scaledToFit()
                    .frame(width: 140, height: 140)
                    .clipShape(RoundedRectangle(cornerRadius: 44, style: .continuous))
                    .overlay(
                        RoundedRectangle(cornerRadius: 44, style: .continuous)
                            .stroke(Color.black.opacity(0.1), lineWidth: 0.5)
                    )
                // Informational Text

                Text("Due to system limitations, starting voice input requires opening the app")
                    .font(.headline)
                    .multilineTextAlignment(.center)
            }
            .padding(.horizontal, 30)
            if hasHomeButton {
                VStack {
                    // Animated tap indicator for top-left corner
                    HStack(spacing: 12) {
                        Image(systemName: "hand.tap.fill")
                            .font(.system(size: 32))
                            .foregroundColor(.accentColor)
                            .opacity(animationOpacity)
                        // Instructions for devices with home button (iPhone SE, etc.)
                        Text("Tap to return to the previous app.")
                            .font(.subheadline)
                            .foregroundColor(.secondary)
                        Spacer()
                    }
                    .padding(.horizontal, 12)
                    .onAppear {  // Tap/pulse animation for home button devices
                        withAnimation(
                            .easeInOut(duration: 0.8)
                                .repeatForever(autoreverses: true)
                        ) {
                            animationOpacity = 1
                        }
                    }
                    Spacer()
                }
            } else {
                VStack {
                    Spacer()
                    // Instructions for devices with swipe gestures (iPhone X and newer)
                    Text("Swipe right to return to the previous app.")
                        .font(.subheadline)
                        .foregroundColor(.secondary)
                        .multilineTextAlignment(.center)
                    // Animated swipe gesture indicator
                    HStack(spacing: 12) {
                        Image(systemName: "hand.tap.fill")
                            .font(.system(size: 32))
                            .foregroundColor(.accentColor)
                            .offset(x: animationOffset)
                            .opacity(animationOpacity)
                        Image(systemName: "arrow.right")
                            .font(.system(size: 16))
                            .foregroundColor(.accentColor)
                            .offset(x: animationOffset)
                            .opacity(animationOpacity)
                    }
                    .onAppear {
                        // Swipe animation for gesture-based devices
                        withAnimation(
                            .easeInOut(duration: 1.5)
                                .repeatForever(autoreverses: false)
                        ) {
                            animationOffset = 50
                            animationOpacity = 1
                        }

                        withAnimation(
                            .easeInOut(duration: 0.75)
                                .repeatForever(autoreverses: true)
                        ) {
                            animationOpacity = 0.3
                        }
                    }
                }
            }
        }
    }
}

#Preview {
    NavigationView {
        RecordingView()
    }
}