<?php

namespace App\Console\Commands;

use App\Services\PointsService;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Schema;

class BackfillPointsScriptCommand extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'points:backfill-script
                            {--type= : 只回填指定类型（video/image/chat），默认三种类型全部回填}
                            {--dry-run : 只统计将回填的记录数，不实际更新}
                            {--force : 重算已有锚点的记录（默认只处理缺失动漫/剧本的记录）}
                            {--limit= : 最多处理记录数（默认全部）}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = '回填积分明细的动漫ID/动漫名与剧本ID/剧本名（历史数据无动漫/剧本维度时为空）';

    /**
     * 每批处理条数
     */
    const CHUNK_SIZE = 500;

    /**
     * Execute the console command.
     *
     * @param PointsService $pointsService
     * @return int
     */
    public function handle(PointsService $pointsService)
    {
        if (!Schema::hasColumn('mp_user_points_details', 'script_id')) {
            $this->error('mp_user_points_details 缺少 script_id/script_name 字段，请先执行 php artisan migrate');

            return 1;
        }

        $dryRun = (bool)$this->option('dry-run');
        $force = (bool)$this->option('force');
        $limit = (int)$this->option('limit');
        if ($limit < 0) {
            $limit = 0;
        }

        $type = trim((string)$this->option('type'));
        $types = in_array($type, ['video', 'image', 'chat'], true) ? [$type] : ['video', 'image', 'chat'];

        $query = DB::table('mp_user_points_details')
            ->select('id', 'type', 'task_id', 'charge_info')
            ->whereIn('type', $types)
            ->orderBy('id');

        if (!$force) {
            $query->where(function ($q) {
                $q->whereNull('anime_id')
                    ->orWhereNull('anime_name')
                    ->orWhereNull('script_id')
                    ->orWhere('script_id', 0);
            });
        }

        $total = (clone $query)->count();
        $this->info('待回填明细总数: ' . $total . ($dryRun ? '（dry-run 模式，不更新）' : ''));
        if ($total <= 0) {
            return 0;
        }
        if ($limit > 0) {
            $this->info('本次最多处理: ' . $limit . ' 条');
        }

        $scanned = 0;
        $filled = 0;
        $skipped = 0;

        $query->chunkById(self::CHUNK_SIZE, function ($rows) use ($pointsService, $dryRun, $limit, &$scanned, &$filled, &$skipped) {
            /** @var array 剧本 => 待更新明细ID */
            $pending = [];

            foreach ($rows as $row) {
                if ($limit > 0 && $scanned >= $limit) {
                    return false;
                }
                $scanned++;

                $chargeInfo = $row->charge_info;
                if (is_string($chargeInfo)) {
                    $chargeInfo = json_decode($chargeInfo, true);
                }
                $chargeInfo = is_array($chargeInfo) ? $chargeInfo : [];

                $context = $pointsService->resolveScriptContext(
                    $chargeInfo,
                    $row->task_id === null ? null : (int)$row->task_id,
                    (string)$row->type
                );

                if (empty($context['anime_id']) && empty($context['script_id'])) {
                    $skipped++;
                    continue;
                }

                $key = (int)$context['anime_id'] . '|' . (string)$context['anime_name'] . '|' . (int)$context['script_id'] . '|' . (string)$context['script_name'];
                $pending[$key][] = (int)$row->id;
            }

            foreach ($pending as $key => $ids) {
                list($animeId, $animeName, $scriptId, $scriptName) = explode('|', $key, 4);
                $filled += count($ids);

                if ($dryRun) {
                    continue;
                }

                DB::table('mp_user_points_details')->whereIn('id', $ids)->update([
                    'anime_id' => (int)$animeId ?: null,
                    'anime_name' => $animeName !== '' ? $animeName : null,
                    'script_id' => (int)$scriptId ?: null,
                    'script_name' => $scriptName !== '' ? $scriptName : null,
                ]);
            }

            return true;
        });

        $this->info('扫描明细: ' . $scanned . ' 条，可回填: ' . $filled . ' 条，与剧本无关: ' . $skipped . ' 条');
        $this->info($dryRun ? 'dry-run 结束，未更新任何数据' : '回填完成');

        return 0;
    }
}