//
//  ResultView.swift
//  Note
//
//  Created by fish on 2026/7/12.
//

import SwiftUI

struct ResultView: View {
    let formattedText: String
    @Environment(\.dismiss) private var dismiss
    @State private var showCopied: Bool = false

    var body: some View {
        ScrollView {
            VStack(alignment: .leading, spacing: 16) {
                Text(formattedText)
                    .font(.body)
                    .lineSpacing(4)
                    .frame(maxWidth: .infinity, alignment: .leading)
                    .padding()
                    .background(Color(.systemGray6))
                    .cornerRadius(12)

                Button(action: copyText) {
                    Label("复制结果", systemImage: "doc.on.doc")
                        .font(.headline)
                        .frame(maxWidth: .infinity)
                        .padding()
                        .background(Color.accentColor)
                        .foregroundStyle(.white)
                        .cornerRadius(10)
                }
            }
            .padding()
        }
        .navigationTitle("格式化结果")
        .navigationBarTitleDisplayMode(.inline)
        .toolbar {
            ToolbarItem(placement: .topBarTrailing) {
                Button("完成") {
                    dismiss()
                }
            }
        }
        .overlay {
            if showCopied {
                VStack {
                    Spacer()
                    Text("已复制")
                        .font(.subheadline)
                        .padding(.horizontal, 16)
                        .padding(.vertical, 8)
                        .background(Color.black.opacity(0.75))
                        .foregroundStyle(.white)
                        .cornerRadius(20)
                        .padding(.bottom, 32)
                }
                .transition(.opacity)
            }
        }
    }

    private func copyText() {
        UIPasteboard.general.string = formattedText
        withAnimation {
            showCopied = true
        }
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.5) {
            withAnimation {
                showCopied = false
            }
        }
    }
}

#Preview {
    NavigationStack {
        ResultView(formattedText: "# 示例文本")
    }
}