<?php

namespace App\Rules;

use Closure;
use Illuminate\Contracts\Validation\ValidationRule;
use Illuminate\Support\Facades\DB;

class UniqueInSchema implements ValidationRule
{
    protected $schema;
    protected $table;
    protected $column;
    protected $ignoreId;

    public function __construct($schema, $table, $column, $ignoreId = null)
    {
        $this->schema = $schema;
        $this->table = $table;
        $this->column = $column;
        $this->ignoreId = $ignoreId;
    }

    public function passes($attribute, $value)
    {
        $query = DB::table($this->schema . '.' . $this->table)
            ->where($this->column, $value);

        if ($this->ignoreId !== null) {
            $query->where('id', '!=', $this->ignoreId);
        }

        return !$query->exists();
    }

    public function message()
    {
        return 'The :attribute has already been taken.';
    }

    public function validate(string $attribute, mixed $value, Closure $fail): void
    {
        if (!$this->passes($attribute, $value)) {
            $fail($this->message());
        }
    }
}