<?php
// +----------------------------------------------------------------------
// | Niucloud-admin 企业快速开发的多应用管理平台
// +----------------------------------------------------------------------
// | 官方网址：https://www.niucloud.com
// +----------------------------------------------------------------------
// | niucloud团队 版权所有 开源版本可自由商用
// +----------------------------------------------------------------------
// | Author: Niucloud Team
// +----------------------------------------------------------------------

namespace app\service\admin\document;

use app\model\document\DocumentGenerateLog;
use app\model\contract\Contract;
use app\job\contract\DocumentGenerateJob;
use core\base\BaseAdminService;
use think\facade\Queue;
use think\facade\Db;

/**
 * 文档生成服务类
 * Class DocumentGenerateService
 * @package app\service\admin\document
 */
class DocumentGenerateService extends BaseAdminService
{
    public function __construct()
    {
        parent::__construct();
        $this->model = new DocumentGenerateLog();
    }

    /**
     * 获取生成记录分页列表
     * @param array $where
     * @return array
     */
    public function getPage(array $where = []): array
    {
        $field = 'id, user_type, template_id, user_id, generated_file, status, error_msg, created_at, completed_at';
        $order = 'created_at desc';

        $search_model = $this->model
            ->withSearch(['template_id', 'user_id', 'user_type', 'status'], $where)
            ->field($field)
            ->order($order);

        $list = $this->pageQuery($search_model, $where);
        
        // 关联合同信息
        if (!empty($list['data'])) {
            $template_ids = array_unique(array_column($list['data'], 'template_id'));
            $contracts = (new Contract())->whereIn('id', $template_ids)->column('name', 'id');
            
            foreach ($list['data'] as &$item) {
                $item['template_name'] = $contracts[$item['template_id']] ?? '';
                $item['user_type_text'] = $item['user_type'] == 1 ? '内部员工' : '外部会员';
                $item['status_text'] = $this->getStatusText($item['status']);
            }
        }

        return $list;
    }

    /**
     * 获取生成记录信息
     * @param int $id
     * @return array
     */
    public function getInfo(int $id): array
    {
        $field = 'id, user_type, template_id, user_id, fill_data, generated_file, status, error_msg, created_at, completed_at';
        
        $info = $this->model->field($field)->where([['id', '=', $id]])->findOrEmpty()->toArray();
        if (empty($info)) {
            throw new \Exception('DATA_NOT_EXIST');
        }
        
        // 获取合同信息
        if (!empty($info['template_id'])) {
            $contract = (new Contract())->where('id', $info['template_id'])->field('id, name')->findOrEmpty();
            $info['template_name'] = $contract['name'] ?? '';
        }
        
        // 解析填充数据
        $info['fill_data'] = json_decode($info['fill_data'], true) ?: [];
        $info['user_type_text'] = $info['user_type'] == 1 ? '内部员工' : '外部会员';
        $info['status_text'] = $this->getStatusText($info['status']);
        
        return $info;
    }

    /**
     * 生成文档
     * @param array $data
     * @return array
     */
    public function generate(array $data): array
    {
        // 验证模板是否存在
        $contract = (new Contract())->find($data['template_id']);
        if (!$contract) {
            throw new \Exception('合同模板不存在');
        }

        // 创建生成记录
        $logData = [
            'user_type' => $data['user_type'],
            'template_id' => $data['template_id'],
            'user_id' => $data['user_id'],
            'fill_data' => json_encode($data['fill_data']),
            'status' => 'pending',
            'created_at' => time()
        ];

        $log = $this->model->create($logData);
        if (!$log) {
            throw new \Exception('创建生成记录失败');
        }

        // 推送到队列
        Queue::push(DocumentGenerateJob::class, ['log_id' => $log->id]);

        return [
            'log_id' => $log->id,
            'status' => 'pending'
        ];
    }

    /**
     * 重新生成文档
     * @param int $id
     * @return array
     */
    public function regenerate(int $id): array
    {
        $log = $this->model->find($id);
        if (!$log) {
            throw new \Exception('生成记录不存在');
        }

        // 重置状态
        $log->save([
            'status' => 'pending',
            'error_msg' => null,
            'completed_at' => 0
        ]);

        // 重新推送到队列
        Queue::push(DocumentGenerateJob::class, ['log_id' => $id]);

        return [
            'log_id' => $id,
            'status' => 'pending'
        ];
    }

    /**
     * 下载生成的文档
     * @param int $id
     * @return array
     */
    public function download(int $id): array
    {
        $log = $this->model->find($id);
        if (!$log) {
            return ['success' => false, 'error' => '生成记录不存在'];
        }

        if ($log['status'] !== 'completed') {
            return ['success' => false, 'error' => '文档尚未生成完成'];
        }

        if (empty($log['generated_file']) || !file_exists($log['generated_file'])) {
            return ['success' => false, 'error' => '文件不存在'];
        }

        return [
            'success' => true,
            'file_path' => $log['generated_file'],
            'file_name' => basename($log['generated_file'])
        ];
    }

    /**
     * 删除生成记录
     * @param int $id
     * @return bool
     */
    public function del(int $id): bool
    {
        $info = $this->model->findOrEmpty($id);
        if ($info->isEmpty()) {
            throw new \Exception('DATA_NOT_EXIST');
        }
        
        // 删除生成的文件
        if (!empty($info['generated_file']) && file_exists($info['generated_file'])) {
            unlink($info['generated_file']);
        }
        
        $res = $info->delete();
        if (!$res) {
            throw new \Exception('DELETE_FAIL');
        }
        
        return true;
    }

    /**
     * 批量删除生成记录
     * @param array $ids
     * @return bool
     */
    public function batchDel(array $ids): bool
    {
        if (empty($ids)) {
            throw new \Exception('请选择要删除的记录');
        }

        Db::startTrans();
        try {
            foreach ($ids as $id) {
                $this->del($id);
            }
            Db::commit();
            return true;
        } catch (\Exception $e) {
            Db::rollback();
            throw $e;
        }
    }

    /**
     * 获取生成统计信息
     * @param int $templateId
     * @return array
     */
    public function getStats(int $templateId = 0): array
    {
        $where = [];
        if ($templateId) {
            $where[] = ['template_id', '=', $templateId];
        }

        $stats = [
            'total' => $this->model->where($where)->count(),
            'pending' => $this->model->where($where)->where('status', 'pending')->count(),
            'processing' => $this->model->where($where)->where('status', 'processing')->count(),
            'completed' => $this->model->where($where)->where('status', 'completed')->count(),
            'failed' => $this->model->where($where)->where('status', 'failed')->count(),
        ];

        return $stats;
    }

    /**
     * 预览文档数据
     * @param int $templateId
     * @param array $fillData
     * @return array
     */
    public function preview(int $templateId, array $fillData): array
    {
        // 获取数据源配置
        $dataSourceService = new DocumentDataSourceService();
        return $dataSourceService->preview($templateId, $fillData);
    }

    /**
     * 获取状态文本
     * @param string $status
     * @return string
     */
    private function getStatusText(string $status): string
    {
        $statusMap = [
            'pending' => '等待处理',
            'processing' => '处理中',
            'completed' => '已完成',
            'failed' => '失败'
        ];

        return $statusMap[$status] ?? '未知状态';
    }
}