<?php

namespace app\mzl\modules\phpoffice\service;

use support\Db;
// use support\Log;
use support\exception\BusinessException;
use app\api\model\PracticeItemsModel;
use app\api\model\PracticeItemsScoreModel;
use app\api\model\PracticeModel;
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Style\Alignment;
use PhpOffice\PhpSpreadsheet\Style\Border;
use PhpOffice\PhpSpreadsheet\Worksheet\Drawing;
// use PhpOffice\PhpSpreadsheet\Style\Fill;
// use PhpOffice\PhpSpreadsheet\Shared\Drawing as SharedDrawing;
// use PhpOffice\PhpSpreadsheet\Writer\Pdf\Dompdf as PdfWriter;
use PhpOffice\PhpSpreadsheet\Worksheet\PageSetup;
use PhpOffice\PhpSpreadsheet\Writer\Pdf\Mpdf as PdfWriter;
use Mpdf\Config\ConfigVariables;
use Mpdf\Config\FontVariables;
use PhpOffice\PhpSpreadsheet\Writer\Pdf\Tcpdf as TcPdfWriter;

class ExcelService
{

    // 配置
    protected $config = [];

    public function __construct()
    {
        $this->config = getConfig('/mzl/modules/phpoffice/config/excel_import.php');
    }
    
    /**
     * 导入Excel数据
     */
    public function importToData(string $template_key, string $filePath): array
    {
        $config = $this->config[$template_key] ?? null;
        if (!$config) {
            throw new BusinessException("未找到模板配置：$template_key");
        }
        $spreadsheet = IOFactory::load($filePath);
        $sheet = $spreadsheet->getActiveSheet();
        $rows = $sheet->toArray(null, true, true, true);
        $callback = $this->callback($template_key) ?? null;
        return $this->toData($rows, $config['column_map'], $callback);
    }

    /**
     * 条件回调
     */
    public function callback(string $template_key)
    {
        switch ($template_key) {
            case 'student':
                $callback = function ($row, $i) {
                    return $i < 3 || empty($row['C']);
                };
                break;
            case 'user':
                $callback = function ($row, $i) {
                    return $i < 2 || empty($row['D']);
                };
                break;
        }
        return $callback;
    }

    /**
     * 获取数据
     */
    public function toData(array $rows = [], array $columnMap = [], $callback = null)
    {
        $data = [];
        foreach ($rows as $i => $row) {
            if ($callback && $callback($row, $i)) {
                continue;
            }
            $item = [];
            foreach ($columnMap as $excelKey => $dbField) {
                $item[$dbField] = trim((string)($row[$excelKey] ?? ''));
            }
            $data[] = $item;
        }
        return $data;
    }

    /**
     * 导入practice
     */
    public function importPractice(string $filePath)
    {
        Db::beginTransaction();
        try {
            $spreadsheet = IOFactory::load($filePath);
            $sheet = $spreadsheet->getSheet(0);
            $rows = $sheet->toArray();

            // 解析标题行
            $titleRow = trim($rows[0][0]);
            preg_match('/(.*?)\s+([A-Za-z0-9-]+\/[A-Za-z0-9]+)$/', $titleRow, $matches);

            $practice = PracticeModel::create([
                'sn' => generateRandomSN(),
                'title' => $matches[1] ?? '未知标题',
                'code' => $matches[2] ?? '未编号'
            ]);

            $currentItem = null;

            foreach ($rows as $index => $row) {
                // 跳过表头前两行（标题行+列头行）
                if ($index < 2 || empty(array_filter($row))) continue;

                // 处理主检查项
                if (!empty($row[0]) && is_numeric($row[0])) {
                    $currentItem = PracticeItemsModel::create([
                        'practice_id' => $practice->id,
                        'index' => $row[0],
                        'exam_content' => $row[1],
                        'scoring_element' => $row[2],
                        'score_allocation' => $row[3]
                    ]);
                }

                // 处理评分标准
                if ($currentItem && !empty($row[4])) {
                    PracticeItemsScoreModel::create([
                        'practice_item_id' => $currentItem->id,
                        'scoring_criteria' => $row[4],
                        'max_deduction' => $row[5],
                        'single_deduction' => $row[6]
                    ]);
                }
            }

            DB::commit();
            return true;
        } catch (\Throwable $e) {
            DB::rollBack();
            return false;
        }
    }


    // ====== ====== ====== 公共方法 ====== ====== ======
    private function setColumnWidths($sheet, array $widths)
    {
        foreach ($widths as $column => $width) {
            $sheet->getColumnDimension($column)->setWidth($width);
        }
    }
    private function setRowHeights($sheet, array $heights)
    {
        foreach ($heights as $row => $height) {
            $sheet->getRowDimension($row)->setRowHeight($height);
        }
    }
    private function centerAlignAllCells($sheet)
    {
        $maxRow = $sheet->getHighestRow();
        $maxCol = $sheet->getHighestColumn();
        $sheet->getStyle("A1:{$maxCol}{$maxRow}")->applyFromArray([
            'alignment' => [
                'horizontal' => \PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER,
                'vertical'   => \PhpOffice\PhpSpreadsheet\Style\Alignment::VERTICAL_CENTER,
            ]
        ]);
    }
    private function setGlobalFont($sheet, $start = null, $end = null, $name = '宋体', $size = 10)
    {
        if ($start && $end) {
            $fw = "{$start}:{$end}";
        } else {
            $maxRow = $sheet->getHighestRow();
            $maxCol = $sheet->getHighestColumn();
            $fw = "A1:{$maxCol}{$maxRow}";
        }
        $sheet->getStyle($fw)->applyFromArray([
            'font' => [
                'name' => $name,
                'size' => $size,
            ],
        ]);
    }
    // ====== ====== ====== 公共方法 ====== ====== ======


    /**
     * 导出 班级总结
     */
    public function exportClassSummary2(array $data, string $outputPath = '班级总结', ?string $signatureImage = null)
    {
        $spreadsheet = new Spreadsheet();
        $sheet       = $spreadsheet->getActiveSheet();

        // ====== 1. 标题 & 基础信息 ======
        $sheet->setCellValue('A1', $data['title'] ?? 'XX（班级名称）班级信息');
        // 标题行立即合并
        $sheet->mergeCells('A1:C1');

        $basicInfo = [
            ['开班地点',   'location'],
            ['开班类型',   'type'],
            ['培训项目',   'program'],
            ['授课老师',   'teacher'],
            ['培训时间',   'time'],
            ['参培学员',   'students'],
            ['合格人员',   'passed'],
            ['通过率',     'pass_rate'],
        ];
        $row = 2;
        foreach ($basicInfo as $info) {
            [$label, $key] = $info;
            $sheet->setCellValue("A{$row}", $label);
            $sheet->setCellValue("B{$row}", $data[$key] ?? '');
            $sheet->mergeCells("B{$row}:C{$row}");
            $row++;
        }

        // ====== 2. 理论考试 ======
        if (! empty($data['theory_exams'])) {
            foreach ($data['theory_exams'] as $idx => $exam) {
                $subject   = $exam['subject'] ?? "科目" . ($idx + 1);
                $fields    = [
                    '考试时间'    => 'time',
                    '考试地点'    => 'location',
                    '主监考'      => 'main_invigilator',
                    '监考人员'    => 'invigilators',
                    '不及格人数'  => 'fail_count',
                    '合格率'      => 'pass_rate',
                ];
                $blockSize = count($fields);
                $startRow  = $row;
                $endRow    = $row + $blockSize - 1;

                $sheet->mergeCells("A{$startRow}:A{$endRow}");
                $sheet->setCellValue("A{$startRow}", "理论考试信息（{$subject}）");

                $r = $startRow;
                foreach ($fields as $label => $key) {
                    $sheet->setCellValue("B{$r}", $label);
                    $sheet->setCellValue("C{$r}", $exam[$key] ?? '');
                    $r++;
                }

                $row = $endRow + 1;
            }
        }

        // ====== 3. 实操考试 ======
        if (! empty($data['practice_exams'])) {
            foreach ($data['practice_exams'] as $idx => $exam) {
                $subject   = $exam['subject'] ?? "实操" . ($idx + 1);
                $fields    = [
                    '考试科目'   => 'subject',
                    '考试时间'   => 'time',
                    '考试地点'   => 'location',
                    '不及格人数' => 'fail_count',
                    '合格率'     => 'pass_rate',
                ];
                $blockSize = count($fields);
                $startRow  = $row;
                $endRow    = $row + $blockSize - 1;

                $sheet->mergeCells("A{$startRow}:A{$endRow}");
                $sheet->setCellValue("A{$startRow}", "实操考试信息（{$subject}）");

                $r = $startRow;
                foreach ($fields as $label => $key) {
                    $sheet->setCellValue("B{$r}", $label);
                    $sheet->setCellValue("C{$r}", $exam[$key] ?? '');
                    $r++;
                }

                $row = $endRow + 1;
            }
        }

        // ====== 5. 样式：合并、边框、对齐、行高、字体 ======
        $lastRow = $row;

        // 全区域合并边框
        $sheet->getStyle("A1:C{$lastRow}")->applyFromArray([
            'borders' => ['allBorders'=>['borderStyle'=>Border::BORDER_THIN]],
        ]);

        // 对齐
        $maxCol = $sheet->getHighestColumn();
        $sheet->getStyle("A1:{$maxCol}{$lastRow}")->applyFromArray([
            'alignment'=>[
                'horizontal'=>\PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER,
                'vertical'  =>\PhpOffice\PhpSpreadsheet\Style\Alignment::VERTICAL_CENTER,
            ]
        ]);

        // 字体
        // 标题行
        $sheet->getStyle('A1')->applyFromArray([
            'font'=>['name'=>'黑体','size'=>22],
        ]);
        // 正文字体
        $sheet->getStyle("A2:C{$lastRow}")->applyFromArray([
            'font'=>['name'=>'宋体','size'=>10],
        ]);
        // 班主任行单独字号 12
        $sheet->getStyle("A{$row}:C{$row}")->applyFromArray([
            'font'=>['name'=>'宋体','size'=>12],
        ]);

        // 行高
        $sheet->getRowDimension(1)->setRowHeight(36);
        for ($r = 2; $r < $lastRow; $r++) {
            $sheet->getRowDimension($r)->setRowHeight(21.75);
        }
        $sheet->getRowDimension($lastRow)->setRowHeight(54);

        // 列宽
        $sheet->getColumnDimension('A')->setWidth(30);
        $sheet->getColumnDimension('B')->setWidth(30);
        $sheet->getColumnDimension('C')->setWidth(24);

        // ====== 4. 班主任签名（水平+垂直居中） ======
        $sheet->setCellValue("A{$row}", '班主任');
        // 合并 B、C 列
        $sheet->mergeCells("B{$row}:C{$row}");

        if ($signatureImage && file_exists($signatureImage)) {
            $drawing = new Drawing();
            $drawing->setPath($signatureImage);
            // 先指定高度，等比例缩放宽度
            $drawing->setHeight(40);
            $drawing->setResizeProportional(true);
            // 锚定到 B{$row} 单元格
            $drawing->setCoordinates("B{$row}");
            // 必须先 add 到工作表，才能正确计算后续的 getWidth()/getHeight()
            $drawing->setWorksheet($sheet);

            // —— 计算区域像素尺寸 —— 
            // 列宽单位转像素近似：1 单位 ≈ 7px
            // 行高点(pt)转像素近似：1pt ≈ 96/72 px
            $pxPerWidth = 7;
            $pxPerPoint = 96 / 72;

            $widthB = $sheet->getColumnDimension('B')->getWidth();
            $widthC = $sheet->getColumnDimension('C')->getWidth();
            $totalWidthPx  = ($widthB + $widthC) * $pxPerWidth;

            $rowHeightPt   = $sheet->getRowDimension($row)->getRowHeight();
            $totalHeightPx = $rowHeightPt * $pxPerPoint;

            // 这时 getWidth()/getHeight() 才会返回渲染后的像素值
            $imageWidthPx  = $drawing->getWidth();
            $imageHeightPx = $drawing->getHeight();

            // 计算居中偏移
            $offsetX = max(0, ($totalWidthPx  - $imageWidthPx)  / 2);
            $offsetY = max(0, ($totalHeightPx - $imageHeightPx) / 2);

            $drawing->setOffsetX($offsetX);
            $drawing->setOffsetY($offsetY);
        } else {
            $sheet->setCellValue("B{$row}", $data['class_teacher'] ?? '');
        }

        // 最后保存
        $writer = new Xlsx($spreadsheet);
        $writer->save($outputPath);
    }


    public function exportClassSummary(array $data, string $outputPath = '班级总结', ?string $signatureImage = null)
    {
        $spreadsheet = $this->buildClassSummarySpreadsheet($data, $signatureImage);
        $writer      = new Xlsx($spreadsheet);
        $writer->save($outputPath);
    }

    /**
     * 构建班级总结的 Spreadsheet 对象（复用给 XLSX 和 PDF）
     *
     * @param array       $data
     * @param string|null $signatureImage
     * @return Spreadsheet
     */
    protected function buildClassSummarySpreadsheet(array $data, ?string $signatureImage = null): Spreadsheet
    {
        $spreadsheet = new Spreadsheet();
        $sheet       = $spreadsheet->getActiveSheet();

        //
        // 1. 标题 & 基础信息
        //
        $sheet->setCellValue('A1', $data['title'] ?? 'XX（班级名称）班级信息');
        $sheet->mergeCells('A1:C1');

        $basicInfo = [
            ['开班地点', 'location'],
            ['开班类型', 'type'],
            ['培训项目', 'program'],
            ['授课老师', 'teacher'],
            ['培训时间', 'time'],
            ['参培学员', 'students'],
            ['合格人员', 'passed'],
            ['通过率',   'pass_rate'],
        ];
        $row = 2;
        foreach ($basicInfo as $info) {
            [$label, $key] = $info;
            $sheet->setCellValue("A{$row}", $label);
            $sheet->setCellValue("B{$row}", $data[$key] ?? '');
            $sheet->mergeCells("B{$row}:C{$row}");
            $row++;
        }

        //
        // 2. 理论考试（theory_exams）
        //
        if (! empty($data['theory_exams']) && is_array($data['theory_exams'])) {
            foreach ($data['theory_exams'] as $idx => $exam) {
                $subject   = $exam['subject'] ?? '科目' . ($idx + 1);
                $fields    = [
                    '考试时间'   => 'time',
                    '考试地点'   => 'location',
                    '主监考'     => 'main_invigilator',
                    '监考人员'   => 'invigilators',
                    '不及格人数' => 'fail_count',
                    '合格率'     => 'pass_rate',
                ];
                $blockSize = count($fields);
                $startRow  = $row;
                $endRow    = $row + $blockSize - 1;

                $sheet->mergeCells("A{$startRow}:A{$endRow}");
                $sheet->setCellValue("A{$startRow}", "理论考试信息（{$subject}）");

                $r = $startRow;
                foreach ($fields as $label => $key) {
                    $sheet->setCellValue("B{$r}", $label);
                    $sheet->setCellValue("C{$r}", $exam[$key] ?? '');
                    $r++;
                }

                $row = $endRow + 1;
            }
        }

        //
        // 3. 实操考试（practice_exams）
        //
        if (! empty($data['practice_exams']) && is_array($data['practice_exams'])) {
            foreach ($data['practice_exams'] as $idx => $exam) {
                $subject   = $exam['subject'] ?? '实操' . ($idx + 1);
                $fields    = [
                    '考试科目'   => 'subject',
                    '考试时间'   => 'time',
                    '考试地点'   => 'location',
                    '不及格人数' => 'fail_count',
                    '合格率'     => 'pass_rate',
                ];
                $blockSize = count($fields);
                $startRow  = $row;
                $endRow    = $row + $blockSize - 1;

                $sheet->mergeCells("A{$startRow}:A{$endRow}");
                $sheet->setCellValue("A{$startRow}", "实操考试信息（{$subject}）");

                $r = $startRow;
                foreach ($fields as $label => $key) {
                    $sheet->setCellValue("B{$r}", $label);
                    $sheet->setCellValue("C{$r}", $exam[$key] ?? '');
                    $r++;
                }

                $row = $endRow + 1;
            }
        }

        //
        // 4. 样式预设：列宽、行高、边框、对齐、字体
        //
        // 列宽
        $sheet->getColumnDimension('A')->setWidth(30);
        $sheet->getColumnDimension('B')->setWidth(30);
        $sheet->getColumnDimension('C')->setWidth(24);

        // 当前签名行号
        $lastRow = $row;

        // 行高
        $sheet->getRowDimension(1)->setRowHeight(36);
        for ($r = 2; $r < $lastRow; $r++) {
            $sheet->getRowDimension($r)->setRowHeight(21.75);
        }
        $sheet->getRowDimension($lastRow)->setRowHeight(54);

        // 边框 + 对齐 + 正文字体
        $sheet->getStyle("A1:C{$lastRow}")->applyFromArray([
            'borders'   => ['allBorders' => ['borderStyle' => Border::BORDER_THIN]],
            'alignment' => [
                'horizontal' => Alignment::HORIZONTAL_CENTER,
                'vertical'   => Alignment::VERTICAL_CENTER,
            ],
            'font'      => ['name' => '宋体', 'size' => 10],
        ]);

        // 标题行字体
        $sheet->getStyle('A1')->applyFromArray([
            'font' => ['name' => '黑体', 'size' => 22],
        ]);

        //
        // 5. 班主任签名 & 图片居中
        //
        $sheet->setCellValue("A{$lastRow}", '班主任');
        $sheet->mergeCells("B{$lastRow}:C{$lastRow}");

        if ($signatureImage && file_exists($signatureImage)) {
            $drawing = new Drawing();
            $drawing->setPath($signatureImage);
            $drawing->setResizeProportional(true);
            $drawing->setHeight(40);
            $drawing->setCoordinates("B{$lastRow}");
            $drawing->setWorksheet($sheet);

            // 近似像素转换系数
            $pxPerColWidth = 7;
            $pxPerPoint    = 96 / 72;

            // 区域宽度 & 高度
            $wB    = $sheet->getColumnDimension('B')->getWidth();
            $wC    = $sheet->getColumnDimension('C')->getWidth();
            $areaW = ($wB + $wC) * $pxPerColWidth;
            $hPt   = $sheet->getRowDimension($lastRow)->getRowHeight();
            $areaH = $hPt * $pxPerPoint;

            // 图片渲染后尺寸
            $imgW = $drawing->getWidth();
            $imgH = $drawing->getHeight();

            // 计算偏移并应用
            $drawing->setOffsetX(max(0, ($areaW - $imgW) / 2));
            $drawing->setOffsetY(max(0, ($areaH - $imgH) / 2));
        } else {
            // 文字班主任行单独字号
            $sheet->getStyle("B{$lastRow}:C{$lastRow}")->applyFromArray([
                'font' => ['name' => '宋体', 'size' => 12],
            ]);
            $sheet->setCellValue("B{$lastRow}", $data['class_teacher'] ?? '');
        }

        return $spreadsheet;
    }

    /**
     * 导出 PDF 文件
     *
     * @param array       $data
     * @param string      $pdfPath
     * @param string|null $signatureImage
     */
    public function exportClassSummaryPdf(array $data, string $pdfPath, ?string $signatureImage = null)
    {
        // 1. 复用生成表格的逻辑
        $spreadsheet = $this->buildClassSummarySpreadsheet($data, $signatureImage);

        // // 2) mPDF 默认目录和字体数据
        // $configVars = new ConfigVariables();
        // $fontDirs   = $configVars->getDefaults()['fontDir'];
        // $fontVars   = new FontVariables();
        // $fontData   = $fontVars->getDefaults()['fontdata'];
        // $myFontDir = base_path('resources/fonts');
        // $mpdfConfig = [
        //     'mode'        => 'utf-8',
        //     'format'      => 'A4',
        //     'fontDir'     => array_merge($fontDirs, [$myFontDir]),
        //     'fontdata'    => array_merge($fontData, [
        //         'sourcehansc' => [
        //             'R' => 'SourceHanSans-Regular.ttf',
        //             'B' => 'SourceHanSans-Bold.ttf',
        //         ]
        //     ]),
        //     'default_font'=> 'sourcehansc',
        //     'autoScriptToLang'=> true,
        //     'autoLangToFont'  => true,
        // ];
        // // 2. 用 mPDF Writer 输出 PDF
        // $pdfWriter = new PdfWriter($spreadsheet, $mpdfConfig);
        // $pdfWriter->setFont('宋体');
        // $pdfWriter->setPaperSize(PageSetup::PAPERSIZE_A4);
        // $pdfWriter->setOrientation(PageSetup::ORIENTATION_PORTRAIT);
        // $pdfWriter->save($pdfPath);


        // 2. 用 TCPDF Writer 输出 PDF
        $tcpdfWriter = new TcPdfWriter($spreadsheet);
        $tcpdfWriter->setFont('cid0cs');
        $tcpdfWriter->setPaperSize(PageSetup::PAPERSIZE_A4);
        $tcpdfWriter->setOrientation(PageSetup::ORIENTATION_PORTRAIT);
        $tcpdfWriter->save($pdfPath);
    }
}