<?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
// =============================================================================
class PemakaianItemDivisiFpdf extends FPDF
{
   public $printUsername = '-';
   public $printDate     = '';

   public function __construct($orientation = 'P', $unit = 'mm', $size = 'A4')
   {
      parent::__construct($orientation, $unit, $size);
      // Daftarkan Arial Narrow
      $this->AddFont('Arial_Narrow', '',  'Arial_Narrow.php');   // regular
      $this->AddFont('Arial_Narrow', 'B', 'Arial_Narrow_B.php'); // bold
   }

   public function Footer()
   {
      $pageW = $this->GetPageWidth() - 30; // 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_pemakaian_item_divisi extends MY_Controller
{
   // -- Properti bersama antar fungsi PDF -------------------------------------
   /** @var PemakaianItemDivisiFpdf */
   private $_pdf;
   private $_pageW;
   private $_start_date;
   private $_end_date;
   private $_division_id;
   private $_division_name;
   private $_username;

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

   public function index()
   {
      echo "Pemakaian Item per Divisi Report API";
   }

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

         if ($start_date === '' || $end_date === '') {
            $this->sys_error("Periode tanggal harus diisi");
            exit;
         }

         // -- Ambil data dari DB --------------------------------------------
         $data = $this->_get_data($start_date, $end_date, $division_id);
         if (empty($data)) {
            $this->sys_error("Tidak ada data pemakaian item pada periode tersebut");
            exit;
         }

         $this->_start_date   = $start_date;
         $this->_end_date     = $end_date;
         $this->_division_id  = $division_id;

         // Ambil nama divisi jika dipilih
         if ($division_id > 0) {
            $div = $this->_get_division($division_id);
            $this->_division_name = $div ? $div['DivisionName'] : '';
         } else {
            $this->_division_name = 'Semua Divisi';
         }

         // -- Inisialisasi FPDF custom --------------------------------------
         $this->_pdf                = new PemakaianItemDivisiFpdf('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->_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();
         $this->_pdf_data($data);
         $this->_pdf_terms();

         // -- Output --------------------------------------------------------
         $filename = 'PID_' . date('Ymd') . '.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 divisi
   // =========================================================================
   private function _get_division($id)
   {
      $sql = "
         SELECT DivisionID, DivisionCode, DivisionName
         FROM division
         WHERE DivisionID = ?
           AND DivisionIsActive = 'Y'
         LIMIT 1
      ";
      $qry = $this->db->query($sql, array($id));
      return $qry && $qry->num_rows() > 0 ? $qry->row_array() : null;
   }

   // =========================================================================
   // DATABASE: Ambil data pemakaian item per divisi
   // =========================================================================
   private function _get_data($start_date, $end_date, $division_id = 0)
   {
      $sql_where = "
         WHERE iu.ItemUsedIsActive = 'Y'
           AND iu.ItemUsedIsConfirm = 'Y'
           AND iu.ItemUsedDate BETWEEN ? AND ?
      ";
      $params = array($start_date, $end_date);

      if ($division_id > 0) {
         // Filter by division melalui item_usage
         $sql_where .= " AND iu.ItemUsedItemUsageID IN (
            SELECT ItemUsageID FROM item_usage
            WHERE ItemUsageDivisionID = ?
              AND ItemUsageIsActive = 'Y'
         )";
         $params[] = $division_id;
      }

      $sql = "
         SELECT
            d.DivisionID,
            d.DivisionCode,
            d.DivisionName,
            iu.ItemUsedID,
            iu.ItemUsedDate,
            iu.ItemUsedNumber,
            iu.ItemUsedBatchNo,
            iu.ItemUsedQty,
            iu.ItemUsedPrice,
            iu.ItemUsedTotal,
            item.M_ItemID,
            item.M_ItemCode,
            item.M_ItemDesc,
            iunit.ItemUnitName,
            iunit.ItemUnitCode,
            us.ItemUsageID,
            us.ItemUsageDivisionID
         FROM item_used iu
         JOIN item_usage us ON us.ItemUsageID = iu.ItemUsedItemUsageID
            AND us.ItemUsageIsActive = 'Y'
         JOIN division d ON d.DivisionID = us.ItemUsageDivisionID
            AND d.DivisionIsActive = 'Y'
         JOIN m_item item ON item.M_ItemID = iu.ItemUsedM_ItemID
            AND item.M_ItemIsActive = 'Y'
         JOIN itemunit iunit ON iunit.ItemUnitID = iu.ItemUsedItemUnitID
            AND iunit.ItemUnitIsActive = 'Y'
         $sql_where
         ORDER BY d.DivisionCode ASC, d.DivisionName ASC, iu.ItemUsedDate ASC, iu.ItemUsedNumber ASC
      ";
      $qry = $this->db->query($sql, $params);
      return $qry ? $qry->result_array() : array();
   }

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

      // -- Judul utama -------------------------------------------------------
      $pdf->SetFont('Arial_Narrow', 'B', 14);
      $pdf->Cell($pageW, 8, 'LAPORAN PEMAKAIAN ITEM PER DIVISI', 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   = 30;
      $valW   = $halfW - $lblW - 4;

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

      $leftItems = array(
         array('Periode Awal',  $this->_fmt_date($this->_start_date), false),
         array('Periode Akhir', $this->_fmt_date($this->_end_date), false),
         array('Divisi',        $this->_division_name, true),
      );

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

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

      $rightItems = array(
         array('Print Oleh', $this->_username),
         array('Tgl Print',  $this->_pdf->printDate),
      );

      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 pemakaian item per divisi
   // =========================================================================
   private function _pdf_data($data)
   {
      $pdf   = $this->_pdf;
      $pageW = $this->_pageW;

      // -- Definisi kolom: [label, lebar, align] -----------------------------
      // Total lebar = 180mm (A4 portrait: 210 - margin 15 kiri - 15 kanan)
      // 8 + 8 + 68 + 15 + 15 + 22 + 22 + 22 = 180
      $cols = array(
         array('No',            6,  'C'),
         array('Tgl',           16,  'C'),
         array('Nama Item',     62, 'L'),
         array('Batch No',      24, 'C'),
         array('Unit',          14, 'C'),
         array('Qty',           10, 'R'),
         array('Harga',         18, 'R'),
         array('Total',         30, 'R'),
      );

      $no       = 1;
      $prevDivID = null;
      $divTotalQty  = 0;
      $divTotalVal  = 0;
      $grandTotalQty = 0;
      $grandTotalVal = 0;

      // Simpan posisi awal Y untuk setiap divisi — dipakai untuk bounding box
      $divStartY = 0;

      foreach ($data as $d) {
         $divID = $d['DivisionID'];

         // -- Jika berganti divisi, cetak subtotal divisi sebelumnya ----------
         if ($prevDivID !== null && $divID !== $prevDivID) {
            $this->_pdf_divisi_subtotal($divTotalQty, $divTotalVal);
            $grandTotalQty += $divTotalQty;
            $grandTotalVal += $divTotalVal;
            $divTotalQty = 0;
            $divTotalVal = 0;
         }

         // -- Jika divisi baru, cetak header nama divisi ---------------------
         if ($prevDivID === null || $divID !== $prevDivID) {
            // Cek sisa ruang: butuh minimal 8+7+6*n+8 ˜ 40mm untuk header+1 baris+subtotal
            if ($pdf->GetY() > 230) {
               $pdf->AddPage();
            }

            $divStartY = $pdf->GetY();

            // Nama Divisi
            $pdf->SetFillColor(50, 80, 130);
            $pdf->SetTextColor(255, 255, 255);
            $pdf->SetFont('Arial_Narrow', 'B', 10);
            $pdf->Cell($pageW, 7, '  ' . $d['DivisionName'] . ' (' . $d['DivisionCode'] . ')', 1, 1, 'L', true);
            $pdf->SetTextColor(0, 0, 0);

            // Header kolom
            $pdf->SetLineWidth(0.3);
            $pdf->SetFont('Arial_Narrow', 'B', 7);
            $pdf->SetFillColor(220, 220, 220);
            $pdf->SetDrawColor(0, 0, 0);
            foreach ($cols as $c) {
               $pdf->Cell($c[1], 6, $c[0], 1, 0, 'C', true);
            }
            $pdf->Ln();

            $no = 1;
         }

         // -- Cek apakah perlu halaman baru (min 12mm untuk 1 baris + subtotal) -
         if ($pdf->GetY() > 258) {
            $pdf->AddPage();
            // Ulang header kolom di halaman baru
            $pdf->SetLineWidth(0.3);
            $pdf->SetFont('Arial_Narrow', 'B', 7);
            $pdf->SetFillColor(220, 220, 220);
            $pdf->SetDrawColor(0, 0, 0);
            foreach ($cols as $c) {
               $pdf->Cell($c[1], 6, $c[0], 1, 0, 'C', true);
            }
            $pdf->Ln();
         }

         // -- Baris data item -----------------------------------------------
         $pdf->SetLineWidth(0.2);
         $pdf->SetFont('Arial_Narrow', '', 7.5);
         $pdf->SetFillColor(255, 255, 255);

         $itemDesc = $d['M_ItemDesc'] ?: ($d['M_ItemCode'] ?: '-');
         $batchNo  = $d['ItemUsedBatchNo'] ?: '-';
         $qty      = floatval($d['ItemUsedQty']);
         $price    = floatval($d['ItemUsedPrice']);
         $total    = floatval($d['ItemUsedTotal']);

         // Simpan posisi Y sebelum cell untuk wrap detection
         $beforeY = $pdf->GetY();

         $pdf->Cell($cols[0][1], 5, $no,             1, 0, 'C');
         $pdf->Cell($cols[1][1], 5, $this->_fmt_date($d['ItemUsedDate']), 1, 0, 'C');
         $pdf->Cell($cols[2][1], 5, $itemDesc,        1, 0, 'L');
         $pdf->Cell($cols[3][1], 5, $batchNo,         1, 0, 'C');
         $pdf->Cell($cols[4][1], 5, $d['ItemUnitName'] ?: ($d['ItemUnitCode'] ?: '-'), 1, 0, 'C');
         $pdf->Cell($cols[5][1], 5, $this->_fmt_qty($qty), 1, 0, 'R');
         $pdf->Cell($cols[6][1], 5, $this->_fmt_rp($price), 1, 0, 'R');
         $pdf->Cell($cols[7][1], 5, $this->_fmt_rp($total), 1, 0, 'R');
         $pdf->Ln();

         $divTotalQty += $qty;
         $divTotalVal += $total;
         $prevDivID    = $divID;
         $no++;
      }

      // -- Subtotal divisi terakhir -----------------------------------------
      if ($prevDivID !== null) {
         $this->_pdf_divisi_subtotal($divTotalQty, $divTotalVal);
         $grandTotalQty += $divTotalQty;
         $grandTotalVal += $divTotalVal;
      }

      // -- Grand Total ------------------------------------------------------
      $pdf->Ln(3);

      // Cek ruang untuk grand total
      if ($pdf->GetY() > 270) {
         $pdf->AddPage();
      }

      $pdf->SetLineWidth(0.4);
      $pdf->SetFont('Arial_Narrow', 'B', 10);
      $pdf->SetFillColor(180, 200, 220);
      $pdf->SetDrawColor(0, 0, 0);

      $spanSum = array_sum(array_column(array_slice($cols, 0, 5), 1));
      $pdf->Cell($spanSum,                       7, 'GRAND TOTAL',           1, 0, 'R', true);
      $pdf->Cell($cols[5][1],                    7, $this->_fmt_qty($grandTotalQty), 1, 0, 'R', true);
      $pdf->Cell($cols[6][1],                    7, '',                      1, 0, 'R', true);
      $pdf->Cell($cols[7][1],                    7, $this->_fmt_rp($grandTotalVal), 1, 0, 'R', true);
      $pdf->Ln();

      $pdf->Ln(4);

      // -- Ringkasan Akhir --------------------------------------------------
      $summaryX = 15 + $pageW - 90;
      $cW1      = 50;
      $cW2      = 40;

      $pdf->SetFont('Arial_Narrow', '', 9);
      $pdf->SetX($summaryX);
      $pdf->Cell($cW1, 5, 'Total Item Digunakan', 0, 0, 'L');
      $pdf->SetFont('Arial_Narrow', 'B', 9);
      $pdf->Cell($cW2, 5, $this->_fmt_qty($grandTotalQty) . ' ' . 'pcs', 0, 1, 'R');

      $pdf->SetFont('Arial_Narrow', '', 9);
      $pdf->SetX($summaryX);
      $pdf->Cell($cW1, 5, 'Total Nilai Pemakaian', 0, 0, 'L');
      $pdf->SetFont('Arial_Narrow', 'B', 9);
      $pdf->Cell($cW2, 5, $this->_fmt_rp($grandTotalVal), 0, 1, 'R');

      $pdf->Ln(4);
   }

   // =========================================================================
   // PDF SUB-SECTION: Subtotal per Divisi
   // =========================================================================
   private function _pdf_divisi_subtotal($qty, $val)
   {
      $pdf   = $this->_pdf;
      $pageW = $this->_pageW;
      // Gunakan lebar kolom yang   sama persis dengan _pdf_data()
      $cols  = array(
         array('No',            6,  'C'),
         array('Tgl',           16, 'C'),
         array('Nama Item',     62, 'L'),
         array('Batch No',      24, 'C'),
         array('Unit',          14, 'C'),
         array('Qty',           10, 'R'),
         array('Harga',         18, 'R'),
         array('Total',         30, 'R'),
      );

      if ($pdf->GetY() > 270) {
         $pdf->AddPage();
      }

      $spanSum = array_sum(array_column(array_slice($cols, 0, 5), 1));
      $pdf->SetLineWidth(0.3);
      $pdf->SetFont('Arial_Narrow', 'B', 8);
      $pdf->SetFillColor(235, 240, 248);
      $pdf->SetDrawColor(0, 0, 0);
      $pdf->Cell($spanSum,                    6, 'Sub Total',            1, 0, 'R', true);
      $pdf->Cell($cols[5][1],                 6, $this->_fmt_qty($qty), 1, 0, 'R', true);
      $pdf->Cell($cols[6][1],                 6, '',                     1, 0, 'R', true);
      $pdf->Cell($cols[7][1],                 6, $this->_fmt_rp($val),  1, 0, 'R', true);
      $pdf->Ln();
      $pdf->Ln(2);
   }

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

      $terms = array(
         'Laporan ini menampilkan seluruh pemakaian item yang telah dikonfirmasi pada periode yang dipilih.',
         'Data pemakaian dikelompokkan berdasarkan divisi yang melakukan pemakaian.',
         'Harga yang ditampilkan adalah harga rata-rata pada saat pemakaian item.',
         'Dokumen ini bersifat internal dan hanya digunakan untuk keperluan monitoring pemakaian item.',
      );

      $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, ',', '.');
   }

   private function _fmt_qty($n)
   {
      return number_format(floatval($n), 0, ',', '.');
   }

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