<?php
defined('BASEPATH') or exit('No direct script access allowed');

require_once(APPPATH . 'libraries/fpdf/fpdf.php');

// =============================================================================
// Custom FPDF: override Footer() agar tampil otomatis di SETIAP halaman
// Footer tidak bisa bergeser karena FPDF memanggil Footer() sebelum ganti hal.
// =============================================================================
class StockReqFpdf extends FPDF
{
   public $printUsername = '-';
   public $printDate     = '';

   public function __construct($orientation = 'P', $unit = 'mm', $size = 'A4')
   {
      parent::__construct($orientation, $unit, $size);
      // Daftarkan Arial Narrow — file font ada di fpdf/font/Arial_Narrow.php
      $this->AddFont('Arial_Narrow', '',  'Arial_Narrow.php');   // regular
      $this->AddFont('Arial_Narrow', 'B', 'Arial_Narrow_B.php'); // bold (Liberation Sans Narrow Bold)
   }

   public function Footer()
   {
      $pageW = $this->GetPageWidth() - 30; // sama dengan margin 15+15

      // ── Posisi: 20mm dari bawah halaman ──────────────────────────────────
      $this->SetY(-20);

      // ── Baris 1: Print Oleh (kiri) | Nomor Halaman (tengah) ───────────────
      $colSide   = ($pageW - 40) / 2;
      $colCenter = 40;

      $this->SetFont('Arial_Narrow', '', 7);
      $this->Cell($colSide,   4, 'Print Oleh : ' . $this->printUsername, 0, 0, 'L');
      $this->Cell($colCenter, 4, $this->PageNo() . ' / {nb}',            0, 0, 'C');
      $this->Cell($colSide,   4, '',                                      0, 1, 'R');

      // ── Baris 2: Tgl Print (kiri) ──────────────────────────────────────────
      $this->SetFont('Arial_Narrow', '', 7);
      $this->Cell($colSide, 4, 'Tgl Print   : ' . $this->printDate, 0, 0, 'L');
      $this->Cell($colCenter + $colSide, 4, '', 0, 1, 'L');
   }
}

// =============================================================================
// Controller
// =============================================================================
class Rpt_stock_request extends MY_Controller
{
   // ── Properti bersama antar fungsi PDF ─────────────────────────────────────
   /** @var StockReqFpdf */
   private $_pdf;
   private $_pageW;
   private $_header_data;
   private $_username;

   public function __construct()
   {
      parent::__construct();
   }

   public function index()
   {
      echo "Stock Request (PR) Report API";
   }

   // =========================================================================
   // ENDPOINT: pdf
   // GET/POST: id (PurchaseRequestID), username (opsional)
   // =========================================================================
   public function pdf()
   {
      try {
         $id       = intval($this->input->get_post('id'));
         $username = trim($this->input->get_post('username') ?? '');

         if ($id <= 0) {
            $this->sys_error("ID tidak valid");
            exit;
         }

         // ── Ambil data header & detail dari DB ────────────────────────────
         $header  = $this->_get_header($id);
         $details = $this->_get_detail($id);

         // ── Inisialisasi FPDF custom ──────────────────────────────────────
         $this->_pdf                  = new StockReqFpdf('P', 'mm', 'A4');
         $this->_pdf->printUsername   = $username !== '' ? $username : '-';
         $this->_pdf->printDate       = date('d-m-Y H:i:s');
         $this->_pageW                = $this->_pdf->GetPageWidth() - 30;
         $this->_header_data          = $header;
         $this->_username             = $this->_pdf->printUsername;

         $this->_pdf->AliasNbPages();                 // aktifkan alias total halaman
         $this->_pdf->SetMargins(15, 15, 15);
         $this->_pdf->SetAutoPageBreak(true, 22);     // 22mm ruang footer di bawah
         $this->_pdf->AddPage();

         // ── Susun isi halaman ─────────────────────────────────────────────
         $this->_pdf_header();
         $this->_pdf_data($details);
         $this->_pdf_terms();

         // ── Output ────────────────────────────────────────────────────────
         $filename = 'SR_' . str_replace('/', '-', $header['PurchaseRequestNumber']) . '.pdf';
         header('Content-Type: application/pdf');
         header('Content-Disposition: inline; filename="' . $filename . '"');
         header('Cache-Control: private, max-age=0, must-revalidate');
         header('Pragma: public');
         echo $this->_pdf->Output('S');
      } catch (Exception $exc) {
         $this->sys_error($exc->getMessage());
      }
   }

   // =========================================================================
   // DATABASE: Ambil data header
   // =========================================================================
   private function _get_header($id)
   {
      $sql = "
         SELECT
            pr.*,
            b.M_BranchName,
            b.M_BranchAddress,
            r.S_RegionalName,
            ic.itemCategoryName,
            IFNULL(u.M_UserUsername,'')  AS CreatedByName,
            IFNULL(ua.M_UserUsername,'') AS ApprovedByName
         FROM purchase_request pr
         LEFT JOIN m_branch   b  ON b.M_BranchCode = pr.PurchaseRequestM_BranchCode
         LEFT JOIN s_regional r  ON r.S_RegionalID = pr.PurchaseRequestS_RegionalID
         LEFT JOIN item_category ic ON ic.itemCategoryID = pr.PurchaseRequestItemCategoryID
         LEFT JOIN m_user     u  ON u.M_UserID     = pr.PurchaseRequestCreatedUserID
         LEFT JOIN m_user     ua ON ua.M_UserID    = pr.PurchaseRequestApprovedBy
         WHERE pr.PurchaseRequestID = ?
         LIMIT 1
      ";
      $qry = $this->db->query($sql, array($id));
      if (!$qry || $qry->num_rows() === 0) {
         $this->sys_error("Data Purchase Request tidak ditemukan");
         exit;
      }
      return $qry->row_array();
   }

   // =========================================================================
   // DATABASE: Ambil data detail
   // =========================================================================
   private function _get_detail($id)
   {
      $sql = "
         SELECT
            prd.*,
            item.M_ItemCode,
            item.M_ItemDesc,
            iu.ItemUnitName,
            iu.ItemUnitCode
         FROM purchase_request_detail prd
         LEFT JOIN m_item item ON item.M_ItemID = prd.PurchaseRequestDetailM_ItemID
         LEFT JOIN itemunit iu ON iu.ItemUnitID = prd.PurchaseRequestDetailItemUnitID
         WHERE prd.PurchaseRequestDetailPurchaseRequestID = ?
           AND prd.PurchaseRequestDetailIsActive = 'Y'
         ORDER BY prd.PurchaseRequestDetailID ASC
      ";
      $qry = $this->db->query($sql, array($id));
      return $qry ? $qry->result_array() : array();
   }

   // =========================================================================
   // PDF SECTION: Header — Judul + Informasi Dokumen (2 kolom)
   // =========================================================================
   private function _pdf_header()
   {
      $pdf    = $this->_pdf;
      $pageW  = $this->_pageW;
      $header = $this->_header_data;

      // ── Judul utama ───────────────────────────────────────────────────────
      $pdf->SetFont('Arial_Narrow', 'B', 14);
      $pdf->Cell($pageW, 8, 'STOCK REQUEST REPORT (PR)', 0, 1, 'L');
      $pdf->SetDrawColor(0, 0, 0);
      $pdf->SetLineWidth(0.5);
      $pdf->Line(15, $pdf->GetY(), 15 + $pageW, $pdf->GetY());
      $pdf->Ln(2);

      $startY = $pdf->GetY();
      $halfW  = $pageW / 2;
      $lblW   = 28;
      $valW   = $halfW - $lblW - 4;

      // ── Kolom Kiri ────────────────────────────────────────────────────────
      $pdf->SetY($startY);

      $leftItems = array(
         array('Nomor',         $header['PurchaseRequestNumber'], true),
         array('Ref Nomor',     $header['PurchaseRequestRefNumber'] ?: '-', false),
         array('Tanggal',       $this->_fmt_date($header['PurchaseRequestDate']), false),
         array('Tanggal Approved', $this->_fmt_datetime($header['PurchaseRequestApprovedDate'])),
      );

      foreach ($leftItems as $item) {
         $pdf->SetX(15);
         $pdf->SetFont('Arial_Narrow', '', 9);
         $pdf->Cell($lblW, 5, $item[0], 0, 0, 'L');
         $pdf->Cell(4,    5, ':', 0, 0, 'C');
         if (isset($item[2]) && $item[2]) {
            $pdf->SetFont('Arial_Narrow', 'B', 9);
         } else {
            $pdf->SetFont('Arial_Narrow', '', 9);
         }
         $pdf->Cell($valW, 5, $item[1], 0, 1, 'L');
      }

      // Keterangan / Note langsung di bawah Status (tanpa spasi vertikal)
      if (!empty($header['PurchaseRequestNote'])) {
         $pdf->SetX(15);
         $pdf->SetFont('Arial_Narrow', '', 9);
         $pdf->Cell($lblW, 5, 'Keterangan', 0, 0, 'L');
         $pdf->Cell(4,    5, ':', 0, 0, 'C');
         $pdf->MultiCell($valW, 5, $header['PurchaseRequestNote'], 0, 'L');
      }
      $leftY = $pdf->GetY();

      // ── Kolom Kanan ───────────────────────────────────────────────────────
      $pdf->SetY($startY);
      $rightX = 15 + $halfW;

      $rightItems = array(
         array('Cabang',           $header['M_BranchName']),
         array('Regional',         $header['S_RegionalName']),
         array('Kategori',         $header['itemCategoryName'] ?: '-'),
         array('Dibuat Oleh',      $header['CreatedByName']),
         array('Disetujui Oleh',   $header['ApprovedByName'] ?: '-'),
      );

      foreach ($rightItems as $item) {
         $pdf->SetX($rightX);
         $pdf->SetFont('Arial_Narrow', '', 9);
         $pdf->Cell($lblW, 5, $item[0], 0, 0, 'L');
         $pdf->Cell(4,    5, ':', 0, 0, 'C');
         $pdf->SetFont('Arial_Narrow', '', 9);
         $pdf->Cell($valW, 5, $item[1], 0, 1, 'L');
      }
      $rightY = $pdf->GetY();

      // Posisikan Y ke yang paling bawah + margin
      $pdf->SetY(max($leftY, $rightY) + 4);
   }

   // =========================================================================
   // PDF SECTION: Data — Tabel detail item + ringkasan nilai
   // =========================================================================
   private function _pdf_data($details)
   {
      $pdf    = $this->_pdf;
      $pageW  = $this->_pageW;
      $header = $this->_header_data;

      // ── Definisi kolom: [label, lebar, align] ─────────────────────────────
      // Total lebar = 180mm (A4 portrait: 210 - margin 15 kiri - 15 kanan)
      // 8 + 82 + 20 + 20 + 25 + 25 = 180
      $cols = array(
         array('No',            8,  'C'),
         array('Nama / Item',   82, 'L'),
         array('Unit',          20, 'C'),
         array('Qty',           20, 'R'),
         array('Harga',         25, 'R'),
         array('Total',         25, 'R'),
      );

      // Header kolom
      $pdf->SetLineWidth(0.3); // border medium
      $pdf->SetFont('Arial_Narrow', 'B', 8);
      $pdf->SetFillColor(220, 220, 220);
      $pdf->SetDrawColor(0, 0, 0);
      foreach ($cols as $c) {
         $pdf->Cell($c[1], 7, $c[0], 1, 0, 'C', true);
      }
      $pdf->Ln();

      // Baris data
      $pdf->SetLineWidth(0.2); // border lebih tipis di data
      $pdf->SetFont('Arial_Narrow', '', 8);
      $pdf->SetFillColor(255, 255, 255);
      $no        = 1;
      $total_est = 0;

      foreach ($details as $d) {
         $pdf->Cell($cols[0][1], 6, $no,                                                         1, 0, 'C');
         $pdf->Cell($cols[1][1], 6, $d['M_ItemDesc'] ?: ($d['M_ItemCode'] ?: '-'),               1, 0, 'L');
         $pdf->Cell($cols[2][1], 6, $d['ItemUnitName'] ?: ($d['ItemUnitCode'] ?: '-'),           1, 0, 'C');
         $pdf->Cell($cols[3][1], 6, $this->_fmt_qty($d['PurchaseRequestDetailQty']),             1, 0, 'C');
         $pdf->Cell($cols[4][1], 6, $this->_fmt_rp($d['PurchaseRequestDetailPrice']),           1, 0, 'R');
         $pdf->Cell($cols[5][1], 6, $this->_fmt_rp($d['PurchaseRequestDetailTotal']),           1, 0, 'R');
         $pdf->Ln();

         $total_est += floatval($d['PurchaseRequestDetailTotal']);
         $no++;
      }

      // Baris TOTAL
      $span = array_sum(array_column(array_slice($cols, 0, 5), 1));
      $pdf->SetLineWidth(0.3);
      $pdf->SetFont('Arial_Narrow', 'B', 9); // bold + size 9 agar menonjol
      $pdf->SetFillColor(220, 220, 220);
      $pdf->Cell($span,        7, 'TOTAL',                    1, 0, 'R', true);
      $pdf->Cell($cols[5][1], 7, $this->_fmt_rp($total_est), 1, 0, 'R', true);
      $pdf->Ln();

      $pdf->Ln(4);
   }

   // =========================================================================
   // PDF SECTION: Syarat & Ketentuan
   // =========================================================================
   private function _pdf_terms()
   {
      $pdf   = $this->_pdf;
      $pageW = $this->_pageW;

      $terms = array(
         'Pengajuan pembelian ini harus mendapatkan persetujuan dari pejabat berwenang sebelum proses pembelian dilakukan.',
         'Barang/jasa yang dibeli harus sesuai dengan spesifikasi dan kebutuhan yang tercantum dalam dokumen ini.',
         'Pembayaran dilakukan setelah barang/jasa diterima dan diverifikasi sesuai pesanan.',
         'Dokumen ini bersifat internal dan hanya digunakan untuk keperluan proses pengadaan.',
      );

      $pdf->SetFont('Arial_Narrow', 'B', 9);
      $pdf->Cell($pageW, 5, 'Syarat & Ketentuan:', 0, 1, 'L');

      $pdf->SetFont('Arial_Narrow', '', 8);
      foreach ($terms as $i => $t) {
         $pdf->Cell(6,            5, ($i + 1) . '.', 0, 0, 'R');
         $pdf->Cell($pageW - 6,   5, $t,             0, 1, 'L');
      }
   }

   // =========================================================================
   // HELPER: Format tampilan
   // =========================================================================
   private function _fmt_date($d)
   {
      if (!$d || $d === '0000-00-00') return '-';
      return date('d-m-Y', strtotime($d));
   }

   private function _fmt_datetime($d)
   {
      if (!$d || $d === '0000-00-00 00:00:00') return '-';
      return date('d-m-Y H:i', strtotime($d));
   }

   private function _fmt_num($n)
   {
      return number_format(floatval($n), 2, ',', '.');
   }

   // format jumlah/qty: tanpa desimal
   private function _fmt_qty($n)
   {
      return number_format(floatval($n), 0, ',', '.');
   }

   private function _fmt_rp($n)
   {
      return 'Rp ' . number_format(floatval($n), 2, ',', '.');
   }
}
