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

class Generateneracasaldo extends CI_Controller {

    public function __construct()
    {
        parent::__construct();
        $this->load->model('DynamicModel', 'dm');

        if (!$this->session->userdata('logged_in')) {
            redirect('auth');
        }
    }

    public function index()
    {

        if($this->session->userdata('role') != 'Admin'){
            show_error('Akses ditolak', 403);
        }

        $data = ["active_menu" => "neraca_saldo"];
        $this->load->view('partials/header', $data);
        $this->load->view('laporan/neraca_saldo');
        $this->load->view('partials/footer');
    }

    // =========================
    // HITUNG LABA BERJALAN (REALTIME)
    // =========================
    private function get_laba_berjalan()
    {
        $this->db->select('
            accounts.tipe,
            COALESCE(SUM(journal_details.debit),0) as debit,
            COALESCE(SUM(journal_details.kredit),0) as kredit
        ');
        $this->db->from('accounts');
        $this->db->join('journal_details','journal_details.account_id = accounts.id','LEFT');
        $this->db->where_in('accounts.tipe',['revenue','expense']);

        $rows = $this->db->get()->result();

        $revenue = 0;
        $expense = 0;

        foreach ($rows as $r) {
            if ($r->tipe == 'revenue') {
                $revenue += ($r->kredit - $r->debit);
            } else {
                $expense += ($r->debit - $r->kredit);
            }
        }

        return $revenue - $expense;
    }

    // =========================
    // AMBIL DATA NERACA SALDO (DIPAKAI BERSAMA OLEH get_data() & generatepdf())
    // =========================
    private function get_neracasaldo_data()
    {
        $this->db->select('
            accounts.kode_akun,
            accounts.nama_akun,
            accounts.tipe,
            accounts.posisi,
            COALESCE(SUM(journal_details.debit),0) as debit,
            COALESCE(SUM(journal_details.kredit),0) as kredit
        ');
        $this->db->from('accounts');
        $this->db->join('journal_details','journal_details.account_id = accounts.id','LEFT');

        // OPTIONAL (best practice)
        $this->db->where('accounts.is_active',1);
        $this->db->where('accounts.kategori','neraca');

        $this->db->group_by('accounts.id');
        $this->db->order_by('accounts.kode_akun','ASC');

        $rows = $this->db->get()->result();

        // =========================
        // HITUNG LABA BERJALAN
        // =========================
        $laba = $this->get_laba_berjalan();

        $result       = [];
        $total_debit  = 0;
        $total_kredit = 0;

        foreach ($rows as $r) {

            // ================= SALDO NORMAL
            if ($r->posisi == 'debit') {
                $saldo = $r->debit - $r->kredit;
            } else {
                $saldo = $r->kredit - $r->debit;
            }

            // ================= OVERRIDE LABA BERJALAN
            if ($r->kode_akun == '302') {
                $saldo = $laba;
            }

            // ================= NORMALISASI KE KOLOM
            if ($saldo >= 0 AND $r->posisi == 'debit') {
                $r->saldo_debit  = $saldo;
                $r->saldo_kredit = 0;
            } else {
                $r->saldo_debit  = 0;
                $r->saldo_kredit = abs($saldo);
            }

            $total_debit  += $r->saldo_debit;
            $total_kredit += $r->saldo_kredit;

            $result[] = [
                'kode'          => $r->kode_akun,
                'nama'          => $r->nama_akun,
                'saldo_debit'   => $r->saldo_debit,
                'saldo_kredit'  => $r->saldo_kredit,
            ];
        }

        return [
            'rows'         => $rows,
            'data'         => $result,
            'total_debit'  => $total_debit,
            'total_kredit' => $total_kredit,
        ];
    }

    // =========================
    // GET DATA NERACA SALDO (JSON, untuk AJAX/datatable)
    // =========================
    public function get_data()
    {
        $result = $this->get_neracasaldo_data();

        echo json_encode($result['rows']);
    }

    // =========================
    // PDF GENERATE — NERACA SALDO
    // =========================
    public function generatepdf()
    {
        if ($this->session->userdata('role') != 'Admin') {
            show_error('Akses ditolak', 403);
        }

        if (ob_get_length()) {
            ob_end_clean();
        }

        // =============================================================
        // AMBIL DATA
        // =============================================================
        $neracasaldo = $this->get_neracasaldo_data();

        // =============================================================
        // DATA PERUSAHAAN
        // =============================================================
        $company = $this->db->get('pengaturan')->row();

        // =============================================================
        // BUILD STRING PERIODE
        // =============================================================
        $periodeStr = 'Per Tanggal : ' . date('d-m-Y');

        // =============================================================
        // LOAD LIBRARY PDF
        // =============================================================
        require_once(APPPATH . 'third_party/fpdf/fpdf.php');
        require_once(APPPATH . 'libraries/PDF_Neracasaldo.php');

        $pdf = new PDF ('P', 'mm', 'A4');
        $pdf->SetMargins(10, 10, 10);

        $pdf->setHeaderData(
            $company->nama_perusahaan,
            $company->alamat_perusahaan,
            FCPATH . 'uploads/img/logo-ljn.png'
        );

        $pdf->setInfoLaporan($periodeStr);

        $pdf->AddPage('P', 'A4');
        $pdf->NeracaSaldoTable(
            $neracasaldo['data'],
            $neracasaldo['total_debit'],
            $neracasaldo['total_kredit']
        );
        $pdf->NeracaSaldoRingkasan(
            $neracasaldo['total_debit'],
            $neracasaldo['total_kredit']
        );
        $pdf->Pembuat('Tito Ngudiana', 'Finance Department');

        // =============================================================
        // OUTPUT
        // =============================================================
        $filename = 'Neraca_Saldo_' . date('YmdHis') . '.pdf';
        $pdf->Output('I', $filename);
        exit;
    }
}