<?php
namespace app\job\contract;

use core\base\BaseJob;
use app\model\contract\ContractSign;
use app\model\document\DocumentGenerateLog;

/**
 * 文档生成队列任务
 */
class DocumentGenerateJobBasic extends BaseJob
{
    /**
     * 执行任务
     * @param array $data 任务数据
     * @return bool
     */
    public function doJob(array $data): bool
    {
        $contractSignId = $data['contract_sign_id'];
        
        try {
            // 1. 获取合同签署信息
            $contractSign = (new ContractSign())->find($contractSignId);
            if (!$contractSign) {
                throw new \Exception('合同签署记录不存在');
            }
            
            // 2. 获取填充数据
            $fillData = json_decode($contractSign['fill_data'], true);
            if (!$fillData) {
                throw new \Exception('填充数据格式错误');
            }
            
            // 3. 生成Word文档
            $generatedFile = $this->generateWordDocument($contractSign, $fillData);
            
            // 4. 更新生成记录
            $this->updateGenerateLog($contractSignId, 'completed', $generatedFile);
            
            return true;
        } catch (\Exception $e) {
            $this->updateGenerateLog($contractSignId, 'failed', null, $e->getMessage());
            return false;
        }
    }
    
    /**
     * 生成Word文档
     * @param ContractSign $contractSign 合同签署记录
     * @param array $fillData 填充数据
     * @return string 生成的文件路径
     * @throws \Exception
     */
    private function generateWordDocument(ContractSign $contractSign, array $fillData): string
    {
        // 1. 获取合同模板
        $contract = \app\model\contract\Contract::find($contractSign['contract_id']);
        if (!$contract) {
            throw new \Exception('合同模板不存在');
        }

        $templatePath = public_path() . '/' . $contract['file_path'];
        if (!file_exists($templatePath)) {
            throw new \Exception('模板文件不存在：' . $templatePath);
        }

        // 2. 获取数据源配置
        $configs = \app\model\document\DocumentDataSourceConfig::where('contract_id', $contractSign['contract_id'])
            ->select()
            ->toArray();

        // 3. 构建替换数据
        $replacements = [];
        foreach ($configs as $config) {
            $placeholder = '{{' . $config['placeholder'] . '}}';
            $value = $fillData[$config['field_name']] ?? $config['default_value'] ?? '';
            $replacements[$placeholder] = $this->formatValue($value, $config['field_type']);
        }

        // 4. 创建输出目录
        $outputDir = 'generated/' . date('Y/m/d/');
        $fullOutputDir = public_path() . '/' . $outputDir;
        if (!is_dir($fullOutputDir)) {
            mkdir($fullOutputDir, 0755, true);
        }

        // 5. 生成文件名
        $fileName = time() . '_' . $contractSign['personnel_id'] . '_contract.docx';
        $outputPath = $outputDir . $fileName;
        $fullOutputPath = public_path() . '/' . $outputPath;

        // 6. 使用PhpWord处理文档
        try {
            $phpWord = \PhpOffice\PhpWord\IOFactory::load($templatePath);

            // 7. 替换占位符
            $this->replaceDocumentPlaceholders($phpWord, $replacements);

            // 8. 保存文档
            $writer = \PhpOffice\PhpWord\IOFactory::createWriter($phpWord, 'Word2007');
            $writer->save($fullOutputPath);

            // 9. 验证文件是否生成成功
            if (!file_exists($fullOutputPath)) {
                throw new \Exception('文档生成失败');
            }

            return $outputPath;

        } catch (\Exception $e) {
            throw new \Exception('文档处理失败：' . $e->getMessage());
        }
    }

    /**
     * 替换文档中的占位符
     * @param \PhpOffice\PhpWord\PhpWord $phpWord
     * @param array $replacements
     */
    private function replaceDocumentPlaceholders(\PhpOffice\PhpWord\PhpWord $phpWord, array $replacements): void
    {
        foreach ($phpWord->getSections() as $section) {
            foreach ($section->getElements() as $element) {
                $this->replaceElementPlaceholders($element, $replacements);
            }
        }
    }

    /**
     * 递归替换元素中的占位符
     * @param mixed $element
     * @param array $replacements
     */
    private function replaceElementPlaceholders($element, array $replacements): void
    {
        if (method_exists($element, 'getElements')) {
            foreach ($element->getElements() as $subElement) {
                $this->replaceElementPlaceholders($subElement, $replacements);
            }
        }

        if (method_exists($element, 'getText')) {
            $text = $element->getText();
            if (is_string($text)) {
                $newText = str_replace(array_keys($replacements), array_values($replacements), $text);
                if (method_exists($element, 'setText')) {
                    $element->setText($newText);
                }
            }
        }
    }

    /**
     * 格式化值
     * @param mixed $value 原始值
     * @param string $type 字段类型
     * @return string
     */
    private function formatValue($value, string $type): string
    {
        switch ($type) {
            case 'datetime':
                if (is_numeric($value)) {
                    return date('Y-m-d H:i:s', $value);
                } elseif (strtotime($value)) {
                    return date('Y-m-d H:i:s', strtotime($value));
                }
                break;
            case 'date':
                if (is_numeric($value)) {
                    return date('Y-m-d', $value);
                } elseif (strtotime($value)) {
                    return date('Y-m-d', strtotime($value));
                }
                break;
            case 'decimal':
                return number_format((float)$value, 2);
            case 'integer':
                return (string)(int)$value;
            default:
                return (string)$value;
        }

        return (string)$value;
    }
    
    /**
     * 更新生成记录
     * @param int $contractSignId 合同签署ID
     * @param string $status 状态
     * @param string|null $generatedFile 生成的文件路径
     * @param string|null $errorMsg 错误信息
     */
    private function updateGenerateLog(int $contractSignId, string $status, ?string $generatedFile = null, ?string $errorMsg = null): void
    {
        $updateData = [
            'status' => $status,
            'completed_at' => time()
        ];
        
        if ($generatedFile) {
            $updateData['generated_file'] = $generatedFile;
        }
        
        if ($errorMsg) {
            $updateData['error_msg'] = $errorMsg;
        }
        
        (new DocumentGenerateLog())->where('id', $contractSignId)->update($updateData);
    }
}