<?php
require_once('../conn.php');
require dirname(dirname(dirname(__DIR__))) . '/common/composer/vendor/autoload.php';
header("Content-Type: application/json");

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
use PhpOffice\PhpSpreadsheet\Style\Fill;

//數字轉英文(0=>A、1=>B、26=>AA...以此類推)
function num2alpha($n)
{
    for ($r = ""; $n >= 0; $n = intval($n / 26) - 1)
        $r = chr($n % 26 + 0x41) . $r;
    return $r;
}

//英文轉數字(A=>0、B=>1、AA=>26...以此類推)
function alpha2num($a)
{
    $l = strlen($a);
    $n = 0;
    for ($i = 0; $i < $l; $i++)
        $n = $n * 26 + ord($a[$i]) - 0x40;
    return $n - 1;
}

try {
    $department_id = isset($_REQUEST['department_id']) ? $_REQUEST['department_id'] : '';
    $user_id = isset($_REQUEST['user_id']) ? $_REQUEST['user_id'] : '';
    $search = isset($_REQUEST['search']) ? $_REQUEST['search'] : '';

    $sql_str = "
        SELECT 
            sm.system_name AS '序號',
            fm.flow_name AS '系統名稱',
            f.form_key AS '流程名稱',
            sf.current_assigner AS '當前簽核者',
            a.name AS '姓名',
            d.depart_name AS '所屬部門',
            sf.update_date AS '接收日期'
        FROM flow AS f
        LEFT JOIN system_main as sm
        ON f.system_id = sm.system_id
        LEFT JOIN flow_main as fm
        ON f.flow_id = fm.flow_id
        LEFT JOIN (
            SELECT
                form_key,
                current_assigner,
                IF(update_date IS NULL,create_date,update_date) AS update_date,
                MAX(seq) AS seq
            FROM subflow
            WHERE 1 = 1
            GROUP BY form_key, current_assigner, update_date
        ) AS sf 
        ON f.form_key = sf.form_key
        LEFT JOIN account AS a
        ON sf.current_assigner = a.accountid
        LEFT JOIN (
            SELECT DISTINCT
            department_id,
            name AS depart_name
            FROM department
        ) AS d
        ON a.department_id = d.department_id
        WHERE 1 =1
        AND f.flow_code != 'Z'
        AND sf.form_key != ''
        AND sf.form_key IS NOT NULL
        AND sf.current_assigner != ''
        AND sf.current_assigner IS NOT NULL
    ";
    $sql_str .= !empty($department_id) ? " AND a.department_id = :department_id " : "";
    $sql_str .= !empty($user_id) ? " AND sf.current_assigner = :user_id " : "";
    if (!empty($search)) {
        $sql_str .= " AND (
        sm.system_name LIKE :search
        OR fm.flow_name LIKE :search
        OR f.form_key LIKE :search
        OR sf.current_assigner LIKE :search
        OR a.name LIKE :search
        OR d.department_id LIKE :search
        OR d.depart_name LIKE :search
        OR sf.update_date LIKE :search
    ) ";
    }
    $stmt = $conn->prepare($sql_str);

    !empty($department_id) ? $stmt->bindParam(':department_id', $department_id) : '';
    !empty($user_id) ? $stmt->bindParam(':user_id', $user_id) : '';
    !empty($search) ? $stmt->bindValue(':search', '%' . $search . '%') : '';
    $stmt->execute();
    $data = $stmt->fetchAll(PDO::FETCH_ASSOC);

    $stmt->execute();

    $spreadsheet = new Spreadsheet();
    $sheet = $spreadsheet->getActiveSheet();
    $sheet->setTitle('部門逾期待簽');

    // 設定標題
    $colTitleArr = [];
    for ($i = 0; $i < $stmt->columnCount(); $i++) {
        $columnMeta = $stmt->getColumnMeta($i);
        $colTitleArr[] = $columnMeta['name'];
    }
    // 標題寫入 excel 第一列
    for ($i = 0; $i < count($colTitleArr); $i++)
        $sheet->setCellValue(num2alpha($i) . '1', $colTitleArr[$i]);

    // 設定內容
    $data = $stmt->fetchAll(PDO::FETCH_NUM);
    $i = 2;
    foreach ($data as $row) {
        for ($j = 0; $j < count($row); $j++) {
            $sheet->setCellValue(num2alpha($j) . $i, $row[$j]);
        }
        $i++;
    }


    $writer = new Xlsx($spreadsheet);
    $file_path = dirname(dirname(dirname(__DIR__))) . '/wms/excel/' . 'signed_overdue_date.xlsx';

    $writer->save($file_path);
    try {
        $writer->save($file_path);
        // 回傳檔案路徑給 JavaScript
        echo json_encode(['data' => $file_path]);
    } catch (Exception $e) {
        echo 'Error: ' . $e->getMessage();
    }
    exit();
} catch (PDOException $e) {
    die("ERROR!!!: " . $e->getMessage());
}