//
//  OnboardingServerView.swift
//  readeck
//
//  Created by Ilyas Hallak on 31.10.25.
//

import SwiftUI

struct OnboardingServerView: View {
    @State private var viewModel = SettingsServerViewModel()

    var body: some View {
        VStack(spacing: 20) {
            SectionHeader(title: "Server Settings".localized, icon: "server.rack")
                .padding(.bottom, 4)

            Text("Enter your Readeck server details to get started.")
                .font(.body)
                .foregroundColor(.secondary)
                .multilineTextAlignment(.center)
                .padding(.bottom, 8)

            // Form
            VStack(spacing: 16) {
                // Server Endpoint
                VStack(alignment: .leading, spacing: 8) {
                    TextField("",
                              text: $viewModel.endpoint,
                              prompt: Text("Server Endpoint").foregroundColor(.secondary))
                        .textFieldStyle(.roundedBorder)
                        .keyboardType(.URL)
                        .autocapitalization(.none)
                        .disableAutocorrection(true)
                        .onChange(of: viewModel.endpoint) {
                            viewModel.clearMessages()
                        }

                    // Quick Input Chips
                    ScrollView(.horizontal, showsIndicators: false) {
                        HStack(spacing: 8) {
                            QuickInputChip(text: "http://", action: {
                                if !viewModel.endpoint.starts(with: "http") {
                                    viewModel.endpoint = "http://" + viewModel.endpoint
                                }
                            })
                            QuickInputChip(text: "https://", action: {
                                if !viewModel.endpoint.starts(with: "http") {
                                    viewModel.endpoint = "https://" + viewModel.endpoint
                                }
                            })
                            QuickInputChip(text: "192.168.", action: {
                                if viewModel.endpoint.isEmpty || viewModel.endpoint == "http://" || viewModel.endpoint == "https://" {
                                    if viewModel.endpoint.starts(with: "http") {
                                        viewModel.endpoint += "192.168."
                                    } else {
                                        viewModel.endpoint = "http://192.168."
                                    }
                                }
                            })
                            QuickInputChip(text: ":8000", action: {
                                if !viewModel.endpoint.contains(":") || viewModel.endpoint.hasSuffix("://") {
                                    viewModel.endpoint += ":8000"
                                }
                            })
                        }
                        .padding(.horizontal, 1)
                    }

                    Text("HTTP/HTTPS supported. HTTP only for local networks. Port optional. No trailing slash needed.")
                        .font(.caption)
                        .foregroundColor(.secondary)
                        .fixedSize(horizontal: false, vertical: true)
                }

                // Username
                VStack(alignment: .leading, spacing: 8) {
                    TextField("",
                              text: $viewModel.username,
                              prompt: Text("Username").foregroundColor(.secondary))
                        .textFieldStyle(.roundedBorder)
                        .autocapitalization(.none)
                        .disableAutocorrection(true)
                        .onChange(of: viewModel.username) {
                            viewModel.clearMessages()
                        }
                }

                // Password
                VStack(alignment: .leading, spacing: 8) {
                    SecureField("",
                                text: $viewModel.password,
                                prompt: Text("Password").foregroundColor(.secondary))
                        .textFieldStyle(.roundedBorder)
                        .onChange(of: viewModel.password) {
                            viewModel.clearMessages()
                        }
                }
            }

            // Messages
            if let errorMessage = viewModel.errorMessage {
                HStack {
                    Image(systemName: "exclamationmark.triangle.fill")
                        .foregroundColor(.red)
                    Text(errorMessage)
                        .foregroundColor(.red)
                        .font(.caption)
                }
            }

            if let successMessage = viewModel.successMessage {
                HStack {
                    Image(systemName: "checkmark.circle.fill")
                        .foregroundColor(.green)
                    Text(successMessage)
                        .foregroundColor(.green)
                        .font(.caption)
                }
            }

            VStack(spacing: 10) {
                Button(action: {
                    Task {
                        await viewModel.saveServerSettings()
                    }
                }) {
                    HStack {
                        if viewModel.isLoading {
                            ProgressView()
                                .scaleEffect(0.8)
                                .progressViewStyle(CircularProgressViewStyle(tint: .white))
                        }
                        Text(viewModel.isLoading ? "Saving..." : (viewModel.isLoggedIn ? "Re-login & Save" : "Login & Save"))
                            .fontWeight(.semibold)
                    }
                    .frame(maxWidth: .infinity)
                    .padding()
                    .background(viewModel.canLogin ? Color.accentColor : Color.gray)
                    .foregroundColor(.white)
                    .cornerRadius(10)
                }
                .disabled(!viewModel.canLogin || viewModel.isLoading)
            }
        }
        .task {
            await viewModel.loadServerSettings()
        }
    }
}

// MARK: - Quick Input Chip Component

struct QuickInputChip: View {
    let text: String
    let action: () -> Void

    var body: some View {
        Button(action: action) {
            Text(text)
                .font(.caption)
                .fontWeight(.medium)
                .padding(.horizontal, 12)
                .padding(.vertical, 6)
                .background(Color(.systemGray5))
                .foregroundColor(.secondary)
                .cornerRadius(12)
        }
    }
}

#Preview {
    OnboardingServerView()
        .padding()
}