using System;
using System.Windows.Forms;

namespace MangsIpulApp
{
    internal static class Program
    {
        /// <summary>
        /// Entry point utama aplikasi.
        /// </summary>
        [STAThread]
        static void Main()
        {
            // Mengaktifkan visual styles untuk tampilan modern
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            
            // Menampilkan form login terlebih dahulu
            // LoginForm akan mengecek apakah user sudah login sebelumnya
            Application.Run(new LoginForm());
        }
    }
}
                                

private void chkShowPassword_CheckedChanged(object sender, EventArgs e)
{
    // Jika checkbox dicentang, tampilkan password asli
    // Jika tidak, tampilkan bullet
    txtPassword.UseSystemPasswordChar = !chkShowPassword.Checked;
}
                                

using System;

namespace MangsIpulApp.Services
{
    public static class SessionManager
    {
        // Menyimpan token JWT yang didapat dari API
        public static string BearerToken { get; set; }
        
        // Informasi user yang sedang login
        public static string CurrentUserId { get; set; }
        public static string CurrentUsername { get; set; }
        public static string CurrentUserEmail { get; set; }
        public static string CurrentUserRole { get; set; }
        
        // Cek apakah user sudah login
        public static bool IsLoggedIn => !string.IsNullOrEmpty(BearerToken);
        
        // Logout: hapus semua session
        public static void Logout()
        {
            BearerToken = null;
            CurrentUserId = null;
            CurrentUsername = null;
            CurrentUserEmail = null;
            CurrentUserRole = null;
        }
    }
}
                                

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;

namespace MangsIpulApp.Services
{
    public class ApiService
    {
        private static HttpClient _client;
        private static readonly object _lock = new object();
        
        // Singleton pattern untuk HttpClient
        public static HttpClient Client
        {
            get
            {
                lock (_lock)
                {
                    if (_client == null)
                    {
                        _client = new HttpClient();
                        _client.BaseAddress = new Uri("http://localhost:8000/api/");
                        _client.DefaultRequestHeaders.Accept.Clear();
                        _client.DefaultRequestHeaders.Accept.Add(
                            new MediaTypeWithQualityHeaderValue("application/json"));
                        _client.Timeout = TimeSpan.FromSeconds(30);
                    }
                    return _client;
                }
            }
        }
        
        // Method untuk menambahkan token Authorization ke setiap request
        public static void SetAuthorizationHeader()
        {
            if (SessionManager.IsLoggedIn)
            {
                Client.DefaultRequestHeaders.Authorization = 
                    new AuthenticationHeaderValue("Bearer", SessionManager.BearerToken);
            }
        }
        
        // Hapus authorization header saat logout
        public static void RemoveAuthorizationHeader()
        {
            Client.DefaultRequestHeaders.Authorization = null;
        }
    }
}
                                

using Newtonsoft.Json;

namespace MangsIpulApp.Models
{
    public class LoginRequest
    {
        public string email { get; set; }
        public string password { get; set; }
    }
    
    public class LoginResponse
    {
        [JsonProperty("token")]
        public string Token { get; set; }
        
        [JsonProperty("user")]
        public User User { get; set; }
        
        [JsonProperty("message")]
        public string Message { get; set; }
    }
    
    public class User
    {
        [JsonProperty("id")]
        public int Id { get; set; }
        
        [JsonProperty("username")]
        public string Username { get; set; }
        
        [JsonProperty("email")]
        public string Email { get; set; }
        
        [JsonProperty("role")]
        public string Role { get; set; }
    }
    
    public class ErrorResponse
    {
        [JsonProperty("message")]
        public string Message { get; set; }
        
        [JsonProperty("errors")]
        public object Errors { get; set; }
    }
}
                                

using System;
using System.Net.Http;
using System.Threading.Tasks;
using System.Windows.Forms;
using Newtonsoft.Json;
using MangsIpulApp.Models;
using MangsIpulApp.Services;

namespace MangsIpulApp.Forms
{
    public partial class LoginForm : Form
    {
        private readonly HttpClient _httpClient;
        
        public LoginForm()
        {
            InitializeComponent();
            _httpClient = ApiService.Client;
        }
        
        private async void btnLogin_Click(object sender, EventArgs e)
        {
            // Validasi input tidak boleh kosong
            if (string.IsNullOrWhiteSpace(txtUsername.Text))
            {
                MessageBox.Show("Username/Email tidak boleh kosong!", 
                    "Validasi", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                txtUsername.Focus();
                return;
            }
            
            if (string.IsNullOrWhiteSpace(txtPassword.Text))
            {
                MessageBox.Show("Password tidak boleh kosong!", 
                    "Validasi", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                txtPassword.Focus();
                return;
            }
            
            // Disable button sambil proses login
            btnLogin.Enabled = false;
            btnLogin.Text = "Memproses...";
            
            // Buat request object
            var loginRequest = new LoginRequest
            {
                email = txtUsername.Text.Trim(),
                password = txtPassword.Text
            };
            
            try
            {
                // Serialize ke JSON
                var json = JsonConvert.SerializeObject(loginRequest);
                var content = new StringContent(json, System.Text.Encoding.UTF8, "application/json");
                
                // Kirim POST request ke endpoint login
                var response = await _httpClient.PostAsync("login", content);
                var responseBody = await response.Content.ReadAsStringAsync();
                
                if (response.IsSuccessStatusCode)
                {
                    // Parse response JSON
                    var loginResult = JsonConvert.DeserializeObject<LoginResponse>(responseBody);
                    
                    // Simpan token dan data user ke SessionManager
                    SessionManager.BearerToken = loginResult.Token;
                    SessionManager.CurrentUserId = loginResult.User.Id.ToString();
                    SessionManager.CurrentUsername = loginResult.User.Username;
                    SessionManager.CurrentUserEmail = loginResult.User.Email;
                    SessionManager.CurrentUserRole = loginResult.User.Role;
                    
                    // Set header Authorization untuk request selanjutnya
                    ApiService.SetAuthorizationHeader();
                    
                    // Tampilkan pesan sukses
                    MessageBox.Show($"Selamat datang, {loginResult.User.Username}!", 
                        "Login Berhasil", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    
                    // Buka Main Dashboard
                    var dashboard = new MainDashboard();
                    dashboard.Show();
                    
                    // Sembunyikan form login, jangan di Close() karena akan mengakhiri aplikasi
                    this.Hide();
                }
                else
                {
                    // Handle error dari API (401, 404, 500, dll)
                    try
                    {
                        var errorResult = JsonConvert.DeserializeObject<ErrorResponse>(responseBody);
                        MessageBox.Show($"Login gagal: {errorResult?.Message ?? "Username atau password salah"}", 
                            "Error Login", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                    catch
                    {
                        MessageBox.Show($"Login gagal: Server mengembalikan error ({(int)response.StatusCode})", 
                            "Error Login", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
                }
            }
            catch (HttpRequestException ex)
            {
                MessageBox.Show($"Tidak dapat terhubung ke server.\nPeriksa koneksi internet Anda.\nDetail: {ex.Message}", 
                    "Network Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            catch (TaskCanceledException)
            {
                MessageBox.Show("Request timeout. Server mungkin sedang sibuk atau koneksi lambat.", 
                    "Timeout", MessageBoxButtons.OK, MessageBoxIcon.Warning);
            }
            catch (Exception ex)
            {
                MessageBox.Show($"Terjadi kesalahan: {ex.Message}", 
                    "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {
                // Enable button kembali
                btnLogin.Enabled = true;
                btnLogin.Text = "LOGIN";
            }
        }
        
        // Event handler untuk tombol Close
        private void btnClose_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
    }
}
                                

using Newtonsoft.Json;
using MangsIpulApp.Services;
using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace MangsIpulApp.Forms
{
    public partial class TransaksiForm : Form
    {
        private readonly HttpClient _httpClient;
        
        public TransaksiForm()
        {
            InitializeComponent();
            _httpClient = ApiService.Client;
            Load += async (s, e) => await LoadTransaksiData();
        }
        
        private async Task LoadTransaksiData()
        {
            try
            {
                // Tampilkan loading indicator
                dgvTransaksi.DataSource = null;
                lblStatus.Text = "Loading data...";
                
                // Panggil API GET /transaksi
                var response = await _httpClient.GetAsync("transaksi");
                var jsonResponse = await response.Content.ReadAsStringAsync();
                
                if (response.IsSuccessStatusCode)
                {
                    // Deserialize ke list of dynamic atau model
                    var transaksiList = JsonConvert.DeserializeObject<List<dynamic>>(jsonResponse);
                    
                    // Flatten data untuk ditampilkan di DataGridView
                    var flatList = new List<TransaksiViewModel>();
                    foreach (var item in transaksiList)
                    {
                        flatList.Add(new TransaksiViewModel
                        {
                            KodeTransaksi = item.kode_transaksi,
                            Tanggal = DateTime.Parse(item.tanggal.ToString()),
                            Pembeli = item.user.username,
                            Alamat = item.user.alamat,
                            NamaBarang = item.barang.nama,
                            Jumlah = item.jumlah,
                            TotalHarga = item.total_harga,
                            Status = item.status
                        });
                    }
                    
                    // Binding ke DataGridView
                    dgvTransaksi.DataSource = flatList;
                    
                    // Format kolom
                    FormatDataGridView();
                    
                    lblStatus.Text = $"Menampilkan {flatList.Count} transaksi";
                }
                else
                {
                    lblStatus.Text = $"Error: {response.StatusCode}";
                    MessageBox.Show($"Gagal load data: {jsonResponse}", "Error", 
                        MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
            catch (Exception ex)
            {
                lblStatus.Text = "Error loading data";
                MessageBox.Show($"Error: {ex.Message}", "Exception", 
                    MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        
        private void FormatDataGridView()
        {
            // Set alignment untuk kolom angka
            if (dgvTransaksi.Columns["TotalHarga"] != null)
                dgvTransaksi.Columns["TotalHarga"].DefaultCellStyle.Format = "Rp #,0";
            
            if (dgvTransaksi.Columns["Tanggal"] != null)
                dgvTransaksi.Columns["Tanggal"].DefaultCellStyle.Format = "dd MMM yyyy HH:mm";
            
            // Warna background berdasarkan status
            dgvTransaksi.CellFormatting += (s, e) => {
                if (dgvTransaksi.Columns[e.ColumnIndex].Name == "Status" && e.Value != null)
                {
                    string status = e.Value.ToString().ToLower();
                    if (status == "completed")
                        e.CellStyle.BackColor = System.Drawing.Color.LightGreen;
                    else if (status == "pending")
                        e.CellStyle.BackColor = System.Drawing.Color.LightYellow;
                    else if (status == "cancelled")
                        e.CellStyle.BackColor = System.Drawing.Color.LightPink;
                }
            };
        }
    }
    
    // ViewModel untuk flatten data
    public class TransaksiViewModel
    {
        public string KodeTransaksi { get; set; }
        public DateTime Tanggal { get; set; }
        public string Pembeli { get; set; }
        public string Alamat { get; set; }
        public string NamaBarang { get; set; }
        public int Jumlah { get; set; }
        public decimal TotalHarga { get; set; }
        public string Status { get; set; }
    }
}
                                

namespace MangsIpulApp.Models
{
    public class Produk
    {
        public int id { get; set; }
        public string nama { get; set; }
        public string kode_produk { get; set; }
        public decimal harga { get; set; }
        public int stok { get; set; }
        public string kategori { get; set; }
        public string deskripsi { get; set; }
        public DateTime created_at { get; set; }
    }
}
                                

public partial class ProdukForm : Form
{
    private async Task LoadProdukData()
    {
        try
        {
            var response = await _httpClient.GetAsync("produk");
            var json = await response.Content.ReadAsStringAsync();
            
            if (response.IsSuccessStatusCode)
            {
                var produkList = JsonConvert.DeserializeObject<List<Produk>>(json);
                dgvProduk.DataSource = produkList;
                
                // Format kolom harga
                dgvProduk.Columns["harga"].DefaultCellStyle.Format = "Rp #,0";
                
                // Color warning jika stok < 10
                dgvProduk.CellFormatting += (s, e) => {
                    if (dgvProduk.Columns[e.ColumnIndex].Name == "stok" && e.Value != null)
                    {
                        int stok = Convert.ToInt32(e.Value);
                        if (stok < 10)
                            e.CellStyle.ForeColor = System.Drawing.Color.Red;
                    }
                };
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show($"Error load produk: {ex.Message}");
        }
    }
}
                                

public partial class MainDashboard : Form
{
    public MainDashboard()
    {
        InitializeComponent();
        this.IsMdiContainer = true;
        this.WindowState = FormWindowState.Maximized;
    }
    
    // Event handler untuk menu Transaksi
    private void transaksiToolStripMenuItem_Click(object sender, EventArgs e)
    {
        OpenChildForm(new TransaksiForm());
        SetTitle("Modul Transaksi");
    }
    
    // Event handler untuk menu Produk
    private void produkToolStripMenuItem_Click(object sender, EventArgs e)
    {
        OpenChildForm(new ProdukForm());
        SetTitle("Modul Manajemen Produk");
    }
    
    // Event handler untuk menu Logout
    private void logoutToolStripMenuItem_Click(object sender, EventArgs e)
    {
        var confirm = MessageBox.Show("Yakin ingin logout?", "Konfirmasi", 
            MessageBoxButtons.YesNo, MessageBoxIcon.Question);
        
        if (confirm == DialogResult.Yes)
        {
            SessionManager.Logout();
            ApiService.RemoveAuthorizationHeader();
            
            // Kembali ke LoginForm
            var loginForm = new LoginForm();
            loginForm.Show();
            this.Close();
        }
    }
    
    private void SetTitle(string title)
    {
        lblModuleTitle.Text = title;
    }
}