<?php

namespace Database\Seeders;

use App\Models\Paper;
use App\Models\Teacher;
use App\Models\University;
use Illuminate\Database\Seeder;

/**
 * 演示论文库数据（对齐 prototype papers.html）。
 */
class PaperSampleSeeder extends Seeder
{
    public function run(): void
    {
        $sjtu = University::query()->where('name', '上海交通大学')->first();
        $zju = University::query()->where('name', '浙江大学')->first();
        $fdu = University::query()->where('name', '复旦大学')->first();

        $samples = [
            [
                'title' => 'Graph Neural Networks for Materials Discovery',
                'authors' => 'Zhang, Li',
                'school_name' => '上海交通大学',
                'university_id' => $sjtu?->id,
                'published_at' => '2025-11-01',
                'url' => 'https://example.com/paper/gnn-materials',
                'summary' => '图神经网络在材料发现中的高通量筛选方法。',
                'source' => 'crawl',
            ],
            [
                'title' => 'Efficient LLM Inference on Edge Devices',
                'authors' => 'Wang et al.',
                'school_name' => '浙江大学',
                'university_id' => $zju?->id,
                'published_at' => '2026-01-01',
                'url' => 'https://example.com/paper/llm-edge',
                'summary' => '面向边缘端的低延迟大模型推理优化。',
                'source' => 'crawl',
            ],
            [
                'title' => 'Multiscale simulation workflow for catalyst screening',
                'authors' => 'Sun Wei',
                'school_name' => '复旦大学',
                'university_id' => $fdu?->id,
                'published_at' => '2024-09-01',
                'url' => 'https://example.com/paper/catalyst-screening',
                'summary' => '结合多尺度模拟与机器学习排序的催化剂候选材料筛选流程。',
                'source' => 'manual',
            ],
        ];

        foreach ($samples as $row) {
            $paper = Paper::query()->firstOrCreate(
                ['title' => $row['title']],
                $row
            );

            if ($row['source'] === 'manual' && $sjtu) {
                $teacher = Teacher::query()
                    ->where('university_id', $sjtu->id)
                    ->where('name', '张某某')
                    ->first();
                if ($teacher) {
                    $teacher->papers()->syncWithoutDetaching([$paper->id]);
                }
            }
        }
    }
}