<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class Segment extends Model
{
    use HasFactory;

    protected $fillable = [
        'website_id',
        'name',
        'filters',
    ];

    protected function casts(): array
    {
        return [
            'filters' => 'array',
        ];
    }

    public function website(): BelongsTo
    {
        return $this->belongsTo(Website::class);
    }

    /**
     * Get the visitor IDs that match this segment's filters.
     */
    public function matchingVisitorIds(): \Illuminate\Support\Collection
    {
        $query = Visitor::where('website_id', $this->website_id);

        foreach ($this->filters as $filter) {
            $field = $filter['field'];
            $operator = $filter['operator'] ?? '=';
            $value = $filter['value'];

            $allowedFields = ['country', 'region', 'city', 'browser', 'os', 'device_type', 'language', 'screen_resolution'];
            if (! in_array($field, $allowedFields)) {
                continue;
            }

            match ($operator) {
                '=' => $query->where($field, $value),
                '!=' => $query->where($field, '!=', $value),
                'contains' => $query->where($field, 'like', "%{$value}%"),
                'starts_with' => $query->where($field, 'like', "{$value}%"),
                default => null,
            };
        }

        return $query->pluck('id');
    }
}