<?php
// app/Traits/HasSaves.php
namespace App\Traits;

use App\Models\SavedItem;

trait HasSaves
{
    public function saves()
    {
        return $this->morphMany(SavedItem::class, 'saveable');
    }

    public function getIsSavedAttribute()
    {
        return $this->isSavedByAuthUser();
    }

    public function getSavedCountAttribute()
    {
        return $this->saves()->count();
    }

    // Check the saves() relation directly (not the is_saved attribute, which a
    // model may override to point at a different table — e.g. Media), so toggle
    // always decides against the same table it writes to.
    protected function isSavedByAuthUser(): bool
    {
        if (!auth()->check()) {
            return false;
        }

        return $this->saves()->where('user_id', auth()->id())->exists();
    }

    public function toggleSaveStatus()
    {
        return $this->isSavedByAuthUser() ? $this->removeSave() : $this->addSave();
    }

    public function addSave()
    {
        if (!auth()->check()) {
            return false;
        }

        // Idempotent: never inserts a duplicate even on repeated/racing calls.
        return SavedItem::firstOrCreate([
            'user_id' => auth()->id(),
            'saveable_id' => $this->id,
            'saveable_type' => get_class($this),
        ]);
    }

    public function removeSave()
    {
        if (!auth()->check()) {
            return false;
        }

        return SavedItem::where([
            'user_id' => auth()->id(),
            'saveable_id' => $this->id,
            'saveable_type' => get_class($this),
        ])->delete();
    }
}