<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;

final class AgentNode extends Model
{
    protected $table = 'agent_nodes';

    protected $fillable = [
        'admin_site_id',
        'parent_id',
        'path',
        'depth',
        'code',
        'name',
        'status',
        'created_by',
        'extra_json',
    ];

    protected function casts(): array
    {
        return [
            'admin_site_id' => 'integer',
            'parent_id' => 'integer',
            'depth' => 'integer',
            'status' => 'integer',
            'extra_json' => 'array',
        ];
    }

    public function isEnabled(): bool
    {
        return (int) $this->status === 1;
    }

    public function isRoot(): bool
    {
        return $this->parent_id === null || (int) $this->depth === 0;
    }

    /** @return BelongsTo<AdminSite, AgentNode> */
    public function adminSite(): BelongsTo
    {
        return $this->belongsTo(AdminSite::class, 'admin_site_id');
    }

    /** @return BelongsTo<AgentNode, AgentNode> */
    public function parent(): BelongsTo
    {
        return $this->belongsTo(self::class, 'parent_id');
    }

    /** @return HasMany<AgentNode, AgentNode> */
    public function children(): HasMany
    {
        return $this->hasMany(self::class, 'parent_id')->orderBy('code');
    }

    public function isDescendantOf(self $ancestor): bool
    {
        if ((int) $this->admin_site_id !== (int) $ancestor->admin_site_id) {
            return false;
        }

        $ancestorPath = (string) $ancestor->path;
        if ($ancestorPath === '') {
            return false;
        }

        return str_starts_with((string) $this->path, $ancestorPath);
    }

    public function isSameOrDescendantOf(self $ancestor): bool
    {
        return (int) $this->id === (int) $ancestor->id || $this->isDescendantOf($ancestor);
    }
}