<?php

namespace App\Console\Commands;

use App\Models\Course;
use App\Services\SchoolmateEnrollmentService;
use Illuminate\Console\Command;

class BackfillSchoolmate extends Command
{
    protected $signature = 'schoolmate:backfill
        {course_ids : 课程ID，多个用英文逗号分隔}
        {--execute : 正式补齐；不传时只检查并输出遗漏名单}';

    protected $description = '按指定课程检查或补齐审核通过学员的校友资格';

    public function handle(SchoolmateEnrollmentService $service)
    {
        $raw = (string) $this->argument('course_ids');
        if (!preg_match('/^[1-9][0-9]*(,[1-9][0-9]*)*$/D', $raw)) {
            $this->error('课程ID必须为正整数，多个用英文逗号分隔。');
            return 1;
        }
        $ids = array_values(array_unique(explode(',', $raw)));
        $courses = Course::whereIn('id', $ids);
        $found = (clone $courses)->get(['id', 'name', 'start_date']);
        $missingIds = array_diff($ids, $found->pluck('id')->all());
        if ($missingIds) {
            $this->error('课程不存在或已删除：' . implode(',', $missingIds));
            return 1;
        }
        // 缺少开课日期时无法确定历史入库时间，整批停止，避免只补一部分。
        foreach ($found as $course) {
            if (!$course->start_date) {
                $this->error("课程 {$course->id}【{$course->name}】缺少开课日期，请先补全。");
                return 1;
            }
        }
        $this->table(['课程ID', '课程名称', '开课日期'], $found->map(function ($course) {
            return [$course->id, $course->name, $course->start_date];
        })->all());
        $execute = (bool) $this->option('execute');
        $this->info($execute ? '正式执行：仅补齐尚非校友的审核通过学员。' : '检查模式：不会修改任何学员数据。');
        $total = 0;
        $updated = 0;
        $service->pendingUsers($courses)->chunkById(200, function ($users) use ($service, $execute, &$total, &$updated) {
            $rows = [];
            foreach ($users as $user) {
                $total++;
                $rows[] = [$user->id, $user->name, $user->mobile, $user->source_start_date];
                if ($execute) {
                    $updated += $service->promote($user->id, $user->source_start_date);
                }
            }
            $this->table(['学员ID', '姓名', '手机号', '拟入库日期（所选课程最早开课日）'], $rows);
        }, 'users.id', 'id');
        $this->info("发现遗漏 {$total} 人" . ($execute ? "，实际补齐 {$updated} 人。" : '；正式补齐请追加 --execute。'));
        return 0;
    }
}