import SwiftUI
import CoreData

struct CreateCodeView: View {
    @Environment(\.dismiss) private var dismiss
    @StateObject private var coreDataManager = CoreDataManager.shared
    
    @State private var selectedDataType: DataType = .qrcode
    @State private var selectedBarcodeType: BarcodeType = .ean13
    @State private var selectedQRCodeType: QRCodeType = .text
    @State private var content = ""
    @State private var showingAlert = false
    @State private var alertMessage = ""
    
    var body: some View {
        NavigationView {
            Form {
                // 数据类型选择
                Section("数据类型") {
                    Picker("数据类型", selection: $selectedDataType) {
                        ForEach(DataType.allCases, id: \.self) { type in
                            HStack {
                                Image(systemName: type.icon)
                                Text(type.displayName)
                            }
                            .tag(type)
                        }
                    }
                    .pickerStyle(SegmentedPickerStyle())
                }
                
                // 具体类型选择
                if selectedDataType == .barcode {
                    Section("条形码类型") {
                        Picker("条形码类型", selection: $selectedBarcodeType) {
                            ForEach(BarcodeType.allCases, id: \.self) { type in
                                HStack {
                                    Image(systemName: type.icon)
                                    Text(type.displayName)
                                }
                                .tag(type)
                            }
                        }
                        .pickerStyle(WheelPickerStyle())
                    }
                } else {
                    Section("二维码类型") {
                        Picker("二维码类型", selection: $selectedQRCodeType) {
                            ForEach(QRCodeType.allCases, id: \.self) { type in
                                HStack {
                                    Image(systemName: type.icon)
                                    Text(type.displayName)
                                }
                                .tag(type)
                            }
                        }
                        .pickerStyle(WheelPickerStyle())
                    }
                }
                
                // 内容输入
                Section("内容") {
                    TextField("请输入内容", text: $content)
                        .frame(minHeight: 80)
                }
                
                // 预览
                if !content.isEmpty {
                    Section("预览") {
                        VStack(alignment: .leading, spacing: 8) {
                            HStack {
                                Image(systemName: selectedDataType.icon)
                                Text(selectedDataType.displayName)
                                Spacer()
                                if selectedDataType == .barcode {
                                    Text(selectedBarcodeType.displayName)
                                        .font(.caption)
                                        .padding(.horizontal, 8)
                                        .padding(.vertical, 2)
                                        .background(Color.green.opacity(0.1))
                                        .foregroundColor(.green)
                                        .cornerRadius(8)
                                } else {
                                    Text(selectedQRCodeType.displayName)
                                        .font(.caption)
                                        .padding(.horizontal, 8)
                                        .padding(.vertical, 2)
                                        .background(Color.orange.opacity(0.1))
                                        .foregroundColor(.orange)
                                        .cornerRadius(8)
                                }
                            }
                            
                            Text(content)
                                .font(.body)
                                .foregroundColor(.secondary)
                        }
                        .padding()
                        .background(Color(.systemGray6))
                        .cornerRadius(8)
                    }
                }
            }
            .navigationTitle("创建\(selectedDataType.displayName)")
            .navigationBarTitleDisplayMode(.inline)
            .toolbar {
                ToolbarItem(placement: .navigationBarLeading) {
                    Button("取消") {
                        dismiss()
                    }
                }
                
                ToolbarItem(placement: .navigationBarTrailing) {
                    Button("创建") {
                        createCode()
                    }
                    .disabled(content.isEmpty)
                }
            }
            .alert("提示", isPresented: $showingAlert) {
                Button("确定") { }
            } message: {
                Text(alertMessage)
            }
        }
    }
    
    private func createCode() {
        guard !content.isEmpty else { return }
        
        let context = coreDataManager.container.viewContext
        let historyItem = HistoryItem(context: context)
        
        historyItem.id = UUID()
        historyItem.content = content
        historyItem.dataType = selectedDataType.rawValue
        historyItem.dataSource = DataSource.created.rawValue
        historyItem.createdAt = Date()
        historyItem.isFavorite = false
        
        if selectedDataType == .barcode {
            historyItem.barcodeType = selectedBarcodeType.rawValue
        } else {
            historyItem.qrCodeType = selectedQRCodeType.rawValue
        }
        
        coreDataManager.addHistoryItem(historyItem)
        alertMessage = "\(selectedDataType.displayName)创建成功！"
        showingAlert = true
        
        // 延迟关闭
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
            dismiss()
        }
    }
}

#Preview {
    CreateCodeView()
}