<?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 {
    $create_at_start = isset($_REQUEST['create_at_start']) ? $_REQUEST['create_at_start'] : '';
    $create_at_end = isset($_REQUEST['create_at_end']) ? $_REQUEST['create_at_end'] : '';
    if (!empty($create_at_start) && !empty($create_at_end)) {
        $sql_str = "SELECT * 
            FROM sanlien_log 
            WHERE SUBSTR(create_at, 1, 10) 
            BETWEEN :create_at_start AND :create_at_end 
        ";
        $stmt = $conn->prepare($sql_str);
        $stmt->bindParam(':create_at_start', $create_at_start);
        $stmt->bindParam(':create_at_end', $create_at_end);
    } else {
        $sql_str = "SELECT * FROM sanlien_log ";
        $stmt = $conn->prepare($sql_str);
    }
    $stmt->execute();

    $spreadsheet = new Spreadsheet();
    $sheet = $spreadsheet->getActiveSheet();
    $sheet->setTitle('三連地震數據');

    // 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/' . 'sanlien.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());
}