<?php
/**
 * DeclarationTVA Create Declaration
 * 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", "write")) {
    accessforbidden();
}

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

// Ensure tables exist (create if missing)
$tables_to_check = array(
    'declarationtva_declarations',
    'declarationtva_periods',
    'declarationtva_ca3_lines'
);

foreach ($tables_to_check as $table_name) {
    $full_table_name = MAIN_DB_PREFIX . $table_name;
    $check_table_sql = "SHOW TABLES LIKE '" . $full_table_name . "'";
    $table_exists = $db->query($check_table_sql);
    
    if (!$table_exists || $db->num_rows($table_exists) == 0) {
        // Create the table based on schema
        if ($table_name == 'declarationtva_declarations') {
            $create_table_sql = "CREATE TABLE IF NOT EXISTS `" . $full_table_name . "` (
                `rowid` int(11) NOT NULL AUTO_INCREMENT,
                `entity` int(11) NOT NULL DEFAULT 1,
                `period_id` int(11) NOT NULL DEFAULT 0,
                `declaration_number` varchar(32) NOT NULL,
                `declaration_name` varchar(255) DEFAULT NULL,
                `start_date` date DEFAULT NULL,
                `end_date` date DEFAULT NULL,
                `status` varchar(32) DEFAULT 'draft' COMMENT 'draft, validated, submitted',
                `total_vat_collected` decimal(15,2) DEFAULT 0.00,
                `total_vat_deductible` decimal(15,2) DEFAULT 0.00,
                `net_vat_due` decimal(15,2) DEFAULT 0.00,
                `vat_credit` decimal(15,2) DEFAULT 0.00,
                `submission_date` datetime DEFAULT NULL,
                `created_date` datetime DEFAULT NULL,
                PRIMARY KEY (`rowid`),
                UNIQUE KEY `uk_declaration_entity_number` (`entity`, `declaration_number`),
                KEY `idx_period_id` (`period_id`)
            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci";
        } elseif ($table_name == 'declarationtva_periods') {
            $create_table_sql = "CREATE TABLE IF NOT EXISTS `" . $full_table_name . "` (
                `rowid` int(11) NOT NULL AUTO_INCREMENT,
                `entity` int(11) NOT NULL DEFAULT 1,
                `period_name` varchar(32) NOT NULL COMMENT 'Q1-2024, Q2-2024, etc.',
                `start_date` date NOT NULL,
                `end_date` date NOT NULL,
                `status` varchar(32) DEFAULT 'draft' COMMENT 'draft, validated, submitted',
                `created_date` datetime DEFAULT NULL,
                PRIMARY KEY (`rowid`),
                UNIQUE KEY `uk_period_entity_name` (`entity`, `period_name`),
                KEY `idx_period_dates` (`start_date`, `end_date`)
            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci";
        } elseif ($table_name == 'declarationtva_ca3_lines') {
            $create_table_sql = "CREATE TABLE IF NOT EXISTS `" . $full_table_name . "` (
                `rowid` int(11) NOT NULL AUTO_INCREMENT,
                `declaration_id` int(11) NOT NULL,
                `ca3_line` varchar(8) NOT NULL,
                `line_label` varchar(255) DEFAULT NULL,
                `base_amount` decimal(15,2) DEFAULT 0.00,
                `vat_amount` decimal(15,2) DEFAULT 0.00,
                `total_amount` decimal(15,2) DEFAULT 0.00,
                `created_date` datetime DEFAULT NULL,
                PRIMARY KEY (`rowid`),
                KEY `idx_declaration_id` (`declaration_id`),
                KEY `idx_ca3_line` (`ca3_line`)
            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci";
        }
        
        $db->query($create_table_sql);
    }
}

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

// Handle form submission
$action = GETPOST('action', 'alpha');
$declaration_name = GETPOST('declaration_name', 'alpha');
$start_date = GETPOST('start_date', 'alpha');
$end_date = GETPOST('end_date', 'alpha');

$error = '';
$success = '';

if ($action == 'create' && !empty($start_date) && !empty($end_date)) {
    // Create the declaration with dates
    $declaration_id = $declarationtva->createDeclarationWithDates($start_date, $end_date, $declaration_name);
    
    if ($declaration_id > 0) {
        $success = $langs->trans("DeclarationCreated");
        // Redirect to view the created declaration
        header("Location: declarationtva_view.php?id=" . $declaration_id);
        exit;
    } else {
        $error = $langs->trans("ErrorCreatingDeclaration") . ": " . $declarationtva->error;
    }
} elseif ($action == 'create' && (empty($start_date) || empty($end_date))) {
    $error = $langs->trans("ErrorMissingDates");
}

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

// Print page header
print load_fiche_titre($title, '', 'title_accountancy');

// Display messages
if ($error) {
    setEventMessages($error, null, 'errors');
}
if ($success) {
    setEventMessages($success, null, 'mesgs');
}

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

print '<form method="POST" action="' . $_SERVER['PHP_SELF'] . '">';
print '<input type="hidden" name="action" value="create">';
print '<input type="hidden" name="token" value="' . newToken() . '">';

print '<table class="noborder centpercent">';

// Date range (now mandatory and at the top)
print '<tr>';
print '<td class="fieldrequired">' . $langs->trans("SelectPeriod") . '</td>';
print '<td>';
print '<input type="date" name="start_date" class="flat" value="' . dol_escape_htmltag($start_date) . '" required>';
print ' - ';
print '<input type="date" name="end_date" class="flat" value="' . dol_escape_htmltag($end_date) . '" required>';
print '<br><small>' . $langs->trans("DateRangeHelp") . '</small>';
print '</td>';
print '</tr>';

// Declaration name
print '<tr>';
print '<td class="fieldrequired">' . $langs->trans("DeclarationName") . '</td>';
print '<td>';
print '<input type="text" name="declaration_name" class="flat" value="' . dol_escape_htmltag($declaration_name) . '" required>';
print '<br><small>' . $langs->trans("DeclarationNameHelp") . '</small>';
print '</td>';
print '</tr>';

print '</table>';

// Buttons
print '<div class="center">';
print '<input type="submit" class="button" value="' . $langs->trans("CreateDeclaration") . '">';
print '<a href="declarationtvaindex.php" class="button">' . $langs->trans("Cancel") . '</a>';
print '</div>';

print '</form>';
print '</div>';

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

// Print footer
llxFooter();
?>