<?php
/**
 * DeclarationTVA Main Interface
 * French CA-3 VAT Declaration Module for Dolibarr
 * MVP Version - Phase 1
 */

// Load Dolibarr environment
if (file_exists('../main.inc.php')) {
    $res = @include '../main.inc.php';
} elseif (file_exists('../../main.inc.php')) {
    $res = @include '../../main.inc.php';
} else {
    $res = 0;
}

if (!$res) {
    die("Include of main fails");
}

// Load module classes
require_once DOL_DOCUMENT_ROOT . '/custom/declarationtva/core/class/declarationtva.class.php';
require_once DOL_DOCUMENT_ROOT . '/custom/declarationtva/core/class/declarationtva_config.class.php';
require_once DOL_DOCUMENT_ROOT . '/custom/declarationtva/core/class/declarationtva_period.class.php';

// Access control
if (!$user->hasRight("declarationtva", "declarationtva", "read")) {
    accessforbidden();
}

// Load language files
$langs->load("declarationtva@declarationtva");

// Initialize objects
$declarationtva = new DeclarationTVA($db, $conf->entity);
$config = new DeclarationTVA_Config($db, $conf->entity);
$period = new DeclarationTVA_Period($db, $conf->entity);

// Handle actions
$action = GETPOST('action', 'alpha');
$declaration_id = GETPOST('declaration_id', 'int');
$period_id = GETPOST('period_id', 'int');

// Process actions
$token = GETPOST('token', 'alpha');

if ($action == 'create_declaration' && $period_id > 0) {
    $declaration_id = $declarationtva->createDeclaration($period_id);
    if ($declaration_id > 0) {
        setEventMessages($langs->trans("DeclarationCreated"), null, 'mesgs');
    } else {
        setEventMessages($langs->trans("ErrorCreatingDeclaration") . ": " . $declarationtva->error, null, 'errors');
    }
} elseif ($action == 'validate_declaration' && $declaration_id > 0 && $token) {
    if ($declarationtva->validateDeclaration($declaration_id)) {
        setEventMessages($langs->trans("DeclarationValidated"), null, 'mesgs');
    } else {
        setEventMessages($langs->trans("ErrorValidatingDeclaration"), null, 'errors');
    }
} elseif ($action == 'submit_declaration' && $declaration_id > 0 && $token) {
    if ($declarationtva->submitDeclaration($declaration_id)) {
        setEventMessages($langs->trans("DeclarationSubmitted"), null, 'mesgs');
    } else {
        setEventMessages($langs->trans("ErrorSubmittingDeclaration"), null, 'errors');
    }
} elseif ($action == 'delete_declaration' && $declaration_id > 0 && $token) {
    if ($declarationtva->deleteDeclaration($declaration_id)) {
        setEventMessages($langs->trans("DeclarationDeleted"), null, 'mesgs');
    } else {
        setEventMessages($langs->trans("ErrorDeletingDeclaration"), null, 'errors');
    }
}

// Get data for display
$declarations = array();

// Get all declarations
$sql = "SELECT d.*, p.period_name, p.start_date as period_start_date, p.end_date as period_end_date 
        FROM " . MAIN_DB_PREFIX . "declarationtva_declarations d
        LEFT JOIN " . MAIN_DB_PREFIX . "declarationtva_periods p ON d.period_id = p.rowid
        WHERE d.entity = " . $conf->entity . " 
        ORDER BY d.created_date DESC";

$result = $db->query($sql);
if ($result) {
    while ($obj = $db->fetch_object($result)) {
        // Use declaration's own dates
        $start_date = $obj->start_date ? $obj->start_date : $obj->period_start_date;
        $end_date = $obj->end_date ? $obj->end_date : $obj->period_end_date;
        
        $declarations[] = array(
            'rowid' => $obj->rowid,
            'declaration_number' => $obj->declaration_number,
            'status' => $obj->status,
            'total_vat_collected' => $obj->total_vat_collected,
            'total_vat_deductible' => $obj->total_vat_deductible,
            'net_vat_due' => $obj->net_vat_due,
            'vat_credit' => $obj->vat_credit,
            'created_date' => $obj->created_date,
            'start_date' => $start_date,
            'end_date' => $end_date
        );
    }
}

// Page title
$title = $langs->trans("DeclarationTVAMainInterface");
llxHeader('', $title);

// Print page header with create button
print load_fiche_titre($title, '<a href="declarationtva_create.php" class="butAction">' . $langs->trans("CreateDeclaration") . '</a>');

// Print declarations section
print '<div class="fiche">';
print '<div class="titre">' . $langs->trans("DeclarationTVADeclarations") . '</div>';

if (empty($declarations)) {
    print '<div class="info">' . $langs->trans("NoDeclarationsFound") . '</div>';
} else {
    print '<table class="noborder centpercent">';
    print '<tr class="liste_titre">';
    print '<th>' . $langs->trans("DeclarationNumber") . '</th>';
    print '<th class="center">' . $langs->trans("Period") . '</th>';
    print '<th class="center">' . $langs->trans("Status") . '</th>';
    print '<th class="center">' . $langs->trans("NetVATDue") . '</th>';
    print '<th class="center">' . $langs->trans("Document") . '</th>';
    print '<th class="center">' . $langs->trans("Actions") . '</th>';
    print '</tr>';

    foreach ($declarations as $d) {
        print '<tr>';
        print '<td>' . $d['declaration_number'] . '</td>';
        print '<td class="center">' . dol_print_date($d['start_date'], 'day') . ' - ' . dol_print_date($d['end_date'], 'day') . '</td>';
        
        // Status with icon
        $status_icon = '';
        if ($d['status'] == 'validated') {
            $status_icon = ' <i class="fa fa-check-circle text-success" title="' . $langs->trans("ValidatedDeclaration") . '"></i>';
        } elseif ($d['status'] == 'draft') {
            $status_icon = ' <i class="fa fa-edit text-warning" title="' . $langs->trans("DraftDeclaration") . '"></i>';
        }
        print '<td class="center">' . $langs->trans("Status" . ucfirst($d['status'])) . $status_icon . '</td>';
        
        // Show VAT amount with proper label - use CA-3 line values instead of main table
        $declarationtva = new DeclarationTVA($db, $conf->entity);
        $ca3_lines = $declarationtva->getCA3Lines($d['rowid']);
        
        // Get line 32 (net VAT due) and lines 26/27 (VAT credit)
        $line_32_amount = 0;
        $line_26_amount = 0;
        $line_27_amount = 0;
        
        foreach ($ca3_lines as $line) {
            if ($line['ca3_line'] == '32') {
                $line_32_amount = $line['vat_amount'];
            } elseif ($line['ca3_line'] == '26') {
                $line_26_amount = $line['vat_amount'];
            } elseif ($line['ca3_line'] == '27') {
                $line_27_amount = $line['vat_amount'];
            }
        }
        
        // Determine which value to show based on CA-3 lines
        if ($line_32_amount > 0) {
            // VAT due case - use line 32
            print '<td class="center"><strong style="color: #dc3545;">' . price($line_32_amount) . '</strong><br><small>' . $langs->trans("NetVATDue") . '</small></td>';
        } elseif ($line_26_amount > 0 || $line_27_amount > 0) {
            // VAT refund case - use line 26 or 27 (whichever is not 0)
            $refund_amount = $line_26_amount > 0 ? $line_26_amount : $line_27_amount;
            print '<td class="center"><strong style="color: #28a745;">' . price($refund_amount) . '</strong><br><small>' . $langs->trans("VATToReceive") . '</small></td>';
        } else {
            // Balanced case
            print '<td class="center"><strong>' . price(0) . '</strong><br><small>' . $langs->trans("VATBalanced") . '</small></td>';
        }
        
        // Document column
        print '<td class="center">';
        if ($d['status'] == 'validated') {
            // Check if document exists
            $has_document = $declarationtva->hasValidatedDocument($d['rowid']);
            
            if ($has_document) {
                $pdf_path = $declarationtva->getValidatedPDFPath($d['rowid']);
                
                if ($pdf_path) {
                    // Create a secure download link through the download handler
                    $download_url = $_SERVER['PHP_SELF'] . '?action=download_pdf&declaration_id=' . $d['rowid'] . '&token=' . newToken();
                    print '<a href="download_pdf.php?id=' . $d['rowid'] . '&token=' . newToken() . '" target="_blank" title="' . $langs->trans("DownloadPDF") . '" style="color: #28a745; text-decoration: none; font-weight: bold;">';
                    print '<i class="fa fa-file-pdf" style="font-size: 16px; color: #dc3545;"></i> PDF';
                    print '</a>';
                } else {
                    print '<i class="fa fa-file-pdf" style="font-size: 16px; color: #28a745;" title="' . $langs->trans("ValidatedPDFAvailable") . '"></i>';
                }
            } else {
                print '<i class="fa fa-file-o text-muted" title="' . $langs->trans("NoDocument") . '"></i>';
            }
        } else {
            print '<i class="fa fa-minus text-muted"></i>';
        }
        print '</td>';
        
        print '<td class="center">';
        
        if ($d['status'] == 'draft') {
            print '<a href="' . $_SERVER['PHP_SELF'] . '?action=delete_declaration&declaration_id=' . $d['rowid'] . '&token=' . newToken() . '" class="button button-delete" onclick="return confirm(\'' . $langs->trans("ConfirmDeleteDeclaration") . '\')">' . $langs->trans("Delete") . '</a> ';
        }
        
        print '<a href="declarationtva_view.php?id=' . $d['rowid'] . '" class="button">' . $langs->trans("View") . '</a>';
        print '</td>';
        print '</tr>';
    }
    print '</table>';
}

print '</div>';

// Print configuration section
print '<div class="fiche">';
print '<div class="titre">' . $langs->trans("DeclarationTVAConfiguration") . '</div>';
print '<div class="info">';
print '<a href="admin/setup_mvp.php" class="butAction">' . $langs->trans("ConfigurePCGAccounts") . '</a>';
print '</div>';
print '</div>';

// Print footer
llxFooter();
?>