<?php
require_once __DIR__ . '/../src/config.php';
require_once __DIR__ . '/../src/auth.php';
require_once __DIR__ . '/../src/db.php';
require_once __DIR__ . '/../src/journal_functions.php';
require_login();

header('Content-Type: application/json');

$action = $_POST['action'] ?? $_GET['action'] ?? '';

try {
    switch ($action) {
        case 'save_entry':
            $id = !empty($_POST['id']) ? (int)$_POST['id'] : null;
            $data = [
                'year_id' => (int)$_POST['year_id'],
                'entry_date' => $_POST['entry_date'] ?? '',
                'description' => $_POST['description'] ?? '',
                'attachment_note' => $_POST['attachment_note'] ?? '',
                'amount' => $_POST['amount'] ?? 0,
                'supplier_id' => !empty($_POST['supplier_id']) ? (int)$_POST['supplier_id'] : null,
                'sort_order' => (int)($_POST['sort_order'] ?? 0),
            ];

            if (!$data['entry_date'] || !$data['description']) {
                echo json_encode(['ok' => false, 'error' => 'Datum und Text sind Pflichtfelder.']);
                exit;
            }

            $accounts = [];
            $acct_types = $_POST['acct_type'] ?? [];
            $acct_sides = $_POST['acct_side'] ?? [];
            $acct_amounts = $_POST['acct_amount'] ?? [];
            $acct_rev_ids = $_POST['acct_rev_id'] ?? [];
            $acct_exp_ids = $_POST['acct_exp_id'] ?? [];
            $acct_notes = $_POST['acct_note'] ?? [];

            for ($i = 0; $i < count($acct_types); $i++) {
                if (empty($acct_types[$i]) || (float)($acct_amounts[$i] ?? 0) == 0) continue;
                $accounts[] = [
                    'account_type' => $acct_types[$i],
                    'side' => $acct_sides[$i] ?? 'soll',
                    'amount' => (float)($acct_amounts[$i] ?? 0),
                    'revenue_category_id' => !empty($acct_rev_ids[$i]) ? (int)$acct_rev_ids[$i] : null,
                    'expense_category_id' => !empty($acct_exp_ids[$i]) ? (int)$acct_exp_ids[$i] : null,
                    'note' => $acct_notes[$i] ?? '',
                ];
            }

            if (empty($accounts)) {
                echo json_encode(['ok' => false, 'error' => 'Mindestens eine Kontenbuchung erforderlich.']);
                exit;
            }

            $saved_id = save_journal_entry($id, $data, $accounts);
            echo json_encode(['ok' => true, 'id' => $saved_id]);
            break;

        case 'delete_entry':
            $del_id = (int)($_POST['id'] ?? 0);
            if ($del_id) {
                delete_journal_entry($del_id);
                echo json_encode(['ok' => true]);
            } else {
                echo json_encode(['ok' => false, 'error' => 'Keine ID.']);
            }
            break;

        case 'get_entry':
            $get_id = (int)($_GET['id'] ?? 0);
            $entry = get_journal_entry($get_id);
            echo json_encode(['ok' => true, 'entry' => $entry]);
            break;

        default:
            echo json_encode(['ok' => false, 'error' => 'Unbekannte Aktion.']);
    }
} catch (\Exception $e) {
    echo json_encode(['ok' => false, 'error' => $e->getMessage()]);
}