<?php
namespace app\common\utils\pdf\controller;

use support\Request;
use support\Response;
use app\common\utils\pdf\service\document\ReimbursementDocumentService;
use app\common\utils\pdf\service\PdfGeneratorService; // 用于通用 HTML 生成
use Exception;

class DocumentController
{

    protected $noNeedLogin = ['downloadReimbursementPdf', 'viewReimbursementPdf'];

    protected $noNeedHeaderData = ['downloadReimbursementPdf', 'viewReimbursementPdf'];

    /**
     * 下载报销单 PDF
     * 访问路由: GET /document/reimbursement/{id}
     * 示例: /document/reimbursement/123
     */
    public function downloadReimbursementPdf(Request $request, int $id)
    {
        try {
            $service = new ReimbursementDocumentService();
            $pdfData = $service->generatePdfById($id);

            $filename = 'reimbursement_' . $id . '_' . date('Ymd_His') . '.pdf';
            return response($pdfData, 200, [
                'Content-Type' => 'application/pdf',
                'Content-Disposition' => 'attachment; filename="' . $filename . '"',
            ]);

        } catch (Exception $e) {
            // 记录日志
            // \support\Log::error("Failed to generate reimbursement PDF: " . $e->getMessage());
            return json(['code' => 1, 'msg' => 'Failed to generate PDF: ' . $e->getMessage()]);
        }
    }

    /**
     * 在浏览器中查看报销单 PDF
     * 访问路由: GET /document/reimbursement/view/{id}
     * 示例: /document/reimbursement/view/123
     */
    public function viewReimbursementPdf(Request $request, int $id)
    {
        try {
            $service = new ReimbursementDocumentService();
            $pdfData = $service->generatePdfById($id);

            return response($pdfData, 200, [
                'Content-Type' => 'application/pdf',
                'Content-Disposition' => 'inline; filename="reimbursement_view_' . $id . '.pdf"', // 'inline' 关键
            ]);

        } catch (Exception $e) {
            return json(['code' => 1, 'msg' => 'Failed to view PDF: ' . $e->getMessage()]);
        }
    }

     /**
     * 保存报销单 PDF 到服务器
     * 访问路由: POST /document/reimbursement/save
     * 参数: id (POST)
     */
    public function saveReimbursementPdf(Request $request)
    {
        $id = $request->post('id');
        if (!$id || !is_numeric($id)) {
             return json(['code' => 1, 'msg' => 'Invalid ID']);
        }

        try {
            // 指定保存路径
            $savePath = runtime_path() . '/generated_pdfs/reimbursements/';
            $service = new ReimbursementDocumentService();
            $service->savePdfToFile((int)$id, $savePath);

            return json(['code' => 0, 'msg' => 'PDF saved successfully', 'path' => $savePath]);

        } catch (Exception $e) {
            return json(['code' => 1, 'msg' => 'Failed to save PDF: ' . $e->getMessage()]);
        }
    }

    /**
     * 通用 HTML 到 PDF 生成接口 (示例)
     * 访问路由: POST /document/generate-from-html
     * 参数: html_content (POST)
     */
    public function generateFromHtml(Request $request)
    {
        $htmlContent = $request->post('html_content');
        if (!$htmlContent) {
             return json(['code' => 1, 'msg' => 'HTML content is required']);
        }

        try {
            $generator = new PdfGeneratorService();
            // 这里直接传入 HTML，不需要模板。可以创建一个简单的 'html_wrapper' 模板来应用样式。
            // 或者直接处理 HTML 字符串。
            // 为简化，我们假设传入的 HTML 已经包含所需样式。
            // 注意：TCPDF 对复杂 CSS 支持有限，内联样式通常更可靠。

            // 创建一个临时数据结构
            $tempData = ['content' => $htmlContent];
            // 创建一个简单的模板 app/view/pdf/html_wrapper.php
            /* 内容示例: <?php echo $data['content']; ?> */
            // 但更简单的是直接使用 TCPDF 的 writeHTMLCell 或类似方法处理原始 HTML 片段
            // 这里我们直接调用 TCPDF (绕过服务的模板机制)

            $pdf = new \TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);
            $pdf->SetCreator('Your System');
            $pdf->SetTitle('Generated from HTML');
            $pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);
            $pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
            $pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);
            $pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);
            $pdf->setFontSubsetting(true);
            $pdf->SetFont('dejavusans', '', 10, '', true);
            $pdf->AddPage();
            // 直接写入 HTML
            $pdf->writeHTML($htmlContent, true, false, true, false, '');
            $pdf->endPage();
            $pdfData = $pdf->Output('', 'S');

            $filename = 'custom_html_' . date('Ymd_His') . '.pdf';
            return response($pdfData, 200, [
                'Content-Type' => 'application/pdf',
                'Content-Disposition' => 'attachment; filename="' . $filename . '"',
            ]);

        } catch (Exception $e) {
            return json(['code' => 1, 'msg' => 'Failed to generate PDF from HTML: ' . $e->getMessage()]);
        }
    }
}