import SwiftUI

struct ProfileScreen: View {
    @EnvironmentObject var appState: AppState
    @Environment(\.dismiss) private var dismiss
    @State private var appearAnimation = false
    @State private var avatarURLLoaded: URL?

    private var displayName: String {
        appState.userName ?? "Worker"
    }

    private var avatarURL: URL? {
        if let loaded = avatarURLLoaded { return loaded }
        guard let urlString = appState.userPhotoUrl, !urlString.isEmpty else { return nil }
        return URL(string: urlString)
    }

    var body: some View {
        ScrollView {
            VStack(spacing: 20) {
                // Avatar section
                VStack(spacing: 8) {
                    if let url = avatarURL {
                        AsyncImage(url: url) { phase in
                            switch phase {
                            case .success(let image):
                                image
                                    .resizable()
                                    .scaledToFill()
                            case .failure:
                                placeholderAvatar
                            default:
                                ProgressView()
                                    .frame(width: 80, height: 80)
                            }
                        }
                        .frame(width: 80, height: 80)
                        .clipShape(Circle())
                        .overlay(Circle().stroke(Color.payfritGreen.opacity(0.3), lineWidth: 2))
                        .shadow(color: .black.opacity(0.1), radius: 6, y: 3)
                    } else {
                        placeholderAvatar
                    }

                    Text(displayName)
                        .font(.title3)
                        .fontWeight(.bold)
                        .foregroundColor(.primary)

                    Text("Worker")
                        .font(.caption)
                        .foregroundColor(.secondary)
                }
                .frame(maxWidth: .infinity)
                .padding(.top, 16)
                .scaleEffect(appearAnimation ? 1 : 0.9)
                .opacity(appearAnimation ? 1 : 0)

                // Info section
                VStack(alignment: .leading, spacing: 12) {
                    Text("Account Information")
                        .font(.subheadline)
                        .fontWeight(.semibold)
                        .foregroundColor(.payfritGreen)
                        .padding(.horizontal, 16)

                    VStack(spacing: 0) {
                        infoRow(icon: "person.fill", label: "Name", value: displayName)
                        Divider().padding(.leading, 54)
                        infoRow(icon: "briefcase.fill", label: "Role", value: "Worker")
                    }
                    .background(Color(.secondarySystemGroupedBackground))
                    .clipShape(RoundedRectangle(cornerRadius: 10, style: .continuous))
                    .padding(.horizontal, 16)
                }
                .opacity(appearAnimation ? 1 : 0)
                .offset(y: appearAnimation ? 0 : 15)

                // Note
                Text("Profile information is managed through your employer. Contact your manager if you need to update your details.")
                    .font(.caption)
                    .foregroundColor(.secondary)
                    .multilineTextAlignment(.center)
                    .padding(.horizontal, 24)
                    .padding(.top, 8)
                    .opacity(appearAnimation ? 1 : 0)

                Spacer()
                    .frame(height: 20)
            }
        }
        .background(Color(.systemGroupedBackground).ignoresSafeArea())
        .navigationTitle("Profile")
        .navigationBarTitleDisplayMode(.inline)
        .task {
            do {
                if let urlString = try await APIService.shared.getAvatarUrl(),
                   let url = URL(string: urlString) {
                    avatarURLLoaded = url
                }
            } catch {
                // Avatar load failed
            }
        }
        .onAppear {
            withAnimation(.spring(response: 0.5, dampingFraction: 0.8)) {
                appearAnimation = true
            }
        }
    }

    private var placeholderAvatar: some View {
        Image(systemName: "person.circle.fill")
            .resizable()
            .foregroundStyle(.linearGradient(
                colors: [Color.payfritGreen.opacity(0.6), Color.payfritGreen.opacity(0.3)],
                startPoint: .top,
                endPoint: .bottom
            ))
            .frame(width: 80, height: 80)
            .shadow(color: .black.opacity(0.1), radius: 6, y: 3)
    }

    private func infoRow(icon: String, label: String, value: String) -> some View {
        HStack(spacing: 14) {
            Image(systemName: icon)
                .font(.subheadline)
                .foregroundColor(.payfritGreen)
                .frame(width: 24)

            VStack(alignment: .leading, spacing: 2) {
                Text(label)
                    .font(.caption)
                    .foregroundColor(.secondary)
                Text(value)
                    .font(.subheadline)
                    .foregroundColor(.primary)
            }

            Spacer()
        }
        .padding(.horizontal, 16)
        .padding(.vertical, 12)
    }
}

#Preview {
    NavigationStack {
        ProfileScreen()
            .environmentObject(AppState())
    }
}