<?php

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

class Generateneraca 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"];
        $this->load->view('partials/header', $data);
        $this->load->view('laporan/neraca');
        $this->load->view('partials/footer');
    }

    // =========================
    // LABA BERJALAN (PAKAI TANGGAL JOURNAL)
    // =========================
    private function get_laba_berjalan($tanggal_dari = null, $tanggal_sampai = null)
    {
        $this->db->select('
            accounts.tipe,
            COALESCE(SUM(jd.debit),0) as debit,
            COALESCE(SUM(jd.kredit),0) as kredit
        ');
        $this->db->from('accounts');
        $this->db->join('journal_details jd','jd.account_id = accounts.id','LEFT');
        $this->db->join('journals j','j.id = jd.journal_id','LEFT');

        $this->db->where_in('accounts.tipe',['revenue','expense']);

        // ================= FILTER TANGGAL
        if($tanggal_dari){
            $this->db->where('(j.tanggal >= "'.$tanggal_dari.'" OR j.tanggal IS NULL)');
        }

        if($tanggal_sampai){
            $this->db->where('(j.tanggal <= "'.$tanggal_sampai.'" OR j.tanggal IS NULL)');
        }

        $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 (DIPAKAI BERSAMA OLEH get_data() & generatepdf())
    // =========================
    private function get_neraca_data($tanggal_dari = null, $tanggal_sampai = null)
    {
        $this->db->select('
            a.id,
            a.kode_akun,
            a.nama_akun,
            a.tipe,
            a.posisi,
            a.is_kontra,
            COALESCE(SUM(jd.debit),0) as debit,
            COALESCE(SUM(jd.kredit),0) as kredit
        ');
        $this->db->from('accounts a');
        $this->db->join('journal_details jd','jd.account_id = a.id','LEFT');
        $this->db->join('journals j','j.id = jd.journal_id','LEFT');

        $this->db->where('a.kategori','neraca');

        // ================= FILTER TANGGAL
        if($tanggal_dari){
            $this->db->where('(j.tanggal >= "'.$tanggal_dari.'" OR j.tanggal IS NULL)');
        }

        if($tanggal_sampai){
            $this->db->where('(j.tanggal <= "'.$tanggal_sampai.'" OR j.tanggal IS NULL)');
        }

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

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

        $activa = [];
        $pasiva = [];

        $total_activa = 0;
        $total_pasiva = 0;

        // ================= LABA BERJALAN
        $laba = $this->get_laba_berjalan($tanggal_dari, $tanggal_sampai);

        foreach ($rows as $r) {

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

            // ================= KONTRA ACCOUNT
            if ($r->is_kontra == 1) {
                $saldo = -$saldo;
            }

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

            // ================= ACTIVA
            if ($r->tipe == 'asset') {

                $activa[] = [
                    'kode' => $r->kode_akun,
                    'nama' => $r->nama_akun,
                    'saldo' => $saldo
                ];

                $total_activa += $saldo;
            }

            // ================= PASIVA
            if (in_array($r->tipe, ['liability','equity'])) {

                $pasiva[] = [
                    'kode' => $r->kode_akun,
                    'nama' => $r->nama_akun,
                    'saldo' => $saldo
                ];

                $total_pasiva += $saldo;
            }
        }

        return [
            'activa'       => $activa,
            'pasiva'       => $pasiva,
            'total_activa' => $total_activa,
            'total_pasiva' => $total_pasiva,
            'laba'         => $laba,
            'selisih'      => $total_activa - $total_pasiva
        ];
    }

    // =========================
    // GET DATA NERACA (JSON, untuk AJAX/datatable)
    // =========================
    public function get_data()
    {
        $tanggal_dari   = $this->input->get('tanggal_dari');
        $tanggal_sampai = $this->input->get('tanggal_sampai');

        $data = $this->get_neraca_data($tanggal_dari, $tanggal_sampai);

        echo json_encode($data);
    }

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

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

        // Normalisasi parameter URL (0000-00-00 dianggap kosong)
        $tanggal_dari   = (!empty($start) && $start != '0000-00-00') ? $start : null;
        $tanggal_sampai = (!empty($end)   && $end   != '0000-00-00') ? $end   : null;

        // =============================================================
        // AMBIL DATA
        // =============================================================
        $neraca = $this->get_neraca_data($tanggal_dari, $tanggal_sampai);

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

        // =============================================================
        // BUILD STRING PERIODE
        // =============================================================
        $periodeStr = (!empty($tanggal_dari) && !empty($tanggal_sampai))
            ? 'Per Tanggal : ' . date('d-m-Y', strtotime($tanggal_sampai))
              . ' (Sejak ' . date('d-m-Y', strtotime($tanggal_dari)) . ')'
            : ((!empty($tanggal_sampai))
                ? 'Per Tanggal : ' . date('d-m-Y', strtotime($tanggal_sampai))
                : 'Per Tanggal : ' . date('d-m-Y'));

        // =============================================================
        // LOAD LIBRARY PDF
        // =============================================================
        require_once(APPPATH . 'third_party/fpdf/fpdf.php');
        require_once(APPPATH . 'libraries/PDF_Neraca.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->NeracaTable(
            $neraca['activa'],
            $neraca['pasiva'],
            $neraca['total_activa'],
            $neraca['total_pasiva']
        );
        $pdf->NeracaRingkasan($neraca['laba'], $neraca['selisih']);
        $pdf->Pembuat('Tito Ngudiana', 'Finance Department');

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