<?php

namespace App\Console\Commands;

use App\Models\MenuModel;
use App\Models\RoleMenuRelationModel;
use App\Service\common\RedisService;
use Illuminate\Console\Command;

/**
 * 按 config/lgp_menu.php 幂等同步 nl_menu
 *
 * name 是全局唯一键，同步以它为准：存在则按声明纠正字段，不存在则插入。
 * pid 用父节点的 name 反查，所以配置里不出现任何自增 id，反复执行结果一致。
 * 同步完必须清菜单缓存，否则前端还会拿到 Redis 里的旧树。
 */
class MenuSyncCommand extends Command
{
    protected $signature = 'lgp:menu-sync
                            {--dry-run : 只预演不写库}
                            {--grant-super : 同步后把新菜单补进超级管理员之外的角色（默认不动角色关系）}';

    protected $description = '同步 LGP 业务菜单到 nl_menu（幂等）';

    private bool $dryRun = false;

    private int $created = 0;

    private int $updated = 0;

    public function handle(): int
    {
        $this->dryRun = (bool) $this->option('dry-run');
        if ($this->dryRun) {
            $this->warn('预演模式：不会写入任何数据');
        }

        $tree = config('lgp_menu', []);
        if (empty($tree)) {
            $this->error('config/lgp_menu.php 为空');
            return self::FAILURE;
        }

        $this->walk($tree, 0);

        $this->newLine();
        $this->info("新增 {$this->created} 条，更新 {$this->updated} 条");

        if (!$this->dryRun) {
            // 菜单树按角色缓存在 Redis，不清的话前端看不到新菜单
            RedisService::getInstance()->init(config('nl.redis.menu_key'))->delAll();
            $this->info('已清空菜单缓存');
            $this->reportRoleBinding();
        }

        return self::SUCCESS;
    }

    /**
     * @param array<int, array<string, mixed>> $nodes
     */
    private function walk(array $nodes, int $pid): void
    {
        foreach ($nodes as $node) {
            // parent 显式声明时优先（用于挂到脚手架已有菜单下），否则跟随递归层级
            $parentId = isset($node['parent'])
                ? $this->resolveParentId((string) $node['parent'])
                : $pid;
            $id = $this->upsert($node, $parentId);
            if (!empty($node['children'])) {
                $this->walk($node['children'], $id);
            }
        }
    }

    private function resolveParentId(string $name): int
    {
        $id = (int) MenuModel::where('name', $name)->where('deleted_at', 0)->value('id');
        if ($id === 0) {
            $this->warn("父级菜单 {$name} 不存在，该节点挂到根目录");
        }
        return $id;
    }

    /**
     * @param array<string, mixed> $node
     * @return int 菜单 id（预演模式下返回 0，子节点会挂到根，仅影响预演输出）
     */
    private function upsert(array $node, int $pid): int
    {
        $isDirectory = ($node['component'] ?? '') === 'BasicLayout';
        $attributes = [
            'title' => (string) $node['title'],
            'icon' => (string) ($node['icon'] ?? ''),
            'path' => (string) $node['path'],
            'component' => (string) $node['component'],
            'redirect' => (string) ($node['redirect'] ?? ''),
            // 取反字段：0 开启缓存 / 0 固定标签
            'keep_alive' => (int) ($node['keep_alive'] ?? ($isDirectory ? 0 : 1)),
            'hide_in_menu' => (int) ($node['hide_in_menu'] ?? 0),
            'affix_tab' => (int) ($node['affix_tab'] ?? 1),
            'badge' => (string) ($node['badge'] ?? ''),
            'badge_type' => (int) ($node['badge_type'] ?? 0),
            'badge_variants' => (int) ($node['badge_variants'] ?? 0),
            'iframe_src' => (string) ($node['iframe_src'] ?? ''),
            'query' => (string) ($node['query'] ?? ''),
            'pid' => $pid,
            'sort' => (int) ($node['sort'] ?? 0),
        ];

        $name = (string) $node['name'];
        $exists = MenuModel::where('name', $name)->first();

        if ($exists) {
            $diff = array_filter(
                $attributes,
                fn ($value, $key) => (string) $exists->{$key} !== (string) $value,
                ARRAY_FILTER_USE_BOTH
            );
            // 已软删的菜单同步时一并复活，否则改配置也救不回来
            if ((int) $exists->deleted_at !== 0) {
                $diff['deleted_at'] = 0;
            }
            if (empty($diff)) {
                $this->line("  = {$attributes['title']} ({$name})");
                return (int) $exists->id;
            }
            $this->line("  ~ {$attributes['title']} ({$name}) " . implode(', ', array_keys($diff)));
            $this->updated++;
            if (!$this->dryRun) {
                $diff['updated_at'] = time();
                MenuModel::where('id', $exists->id)->update($diff);
            }
            return (int) $exists->id;
        }

        $this->line("  + {$attributes['title']} ({$name})");
        $this->created++;
        if ($this->dryRun) {
            return 0;
        }
        $attributes['created_at'] = time();
        return (int) MenuModel::insertGetId($attributes);
    }

    /**
     * 只提示不自动授权：给谁看哪些菜单是业务决策，命令替用户决定容易造成越权
     */
    private function reportRoleBinding(): void
    {
        if (!$this->option('grant-super')) {
            $bound = RoleMenuRelationModel::distinct()->count('role_id');
            $this->newLine();
            $this->warn("超级管理员（role_id=1）自动可见全部菜单；其余 {$bound} 个已授权角色需到「角色管理」重新勾选新菜单。");
        }
    }
}