<?php

namespace App\Models;

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

class ChatFeedback extends Model
{
    protected $fillable = [
        'chat_log_id',
        'user_id',
        'rating',
        'comment',
        'correct_answer',
        'converted_to_faq',
        'converted_faq_id',
        'reviewed_by',
        'reviewed_at',
    ];

    protected $casts = [
        'converted_to_faq' => 'boolean',
        'reviewed_at'      => 'datetime',
    ];

    const RATING_HELPFUL           = 'helpful';
    const RATING_NOT_HELPFUL       = 'not_helpful';
    const RATING_PARTIALLY_HELPFUL = 'partially_helpful';

    // === Relationships ===

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

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

    public function reviewer(): BelongsTo
    {
        return $this->belongsTo(User::class, 'reviewed_by');
    }

    public function convertedFaq(): BelongsTo
    {
        return $this->belongsTo(KnowledgeItem::class, 'converted_faq_id');
    }

    // === Scopes ===

    public function scopeNegative(Builder $query): Builder
    {
        return $query->where('rating', self::RATING_NOT_HELPFUL);
    }

    public function scopeNotConverted(Builder $query): Builder
    {
        return $query->where('converted_to_faq', false)
                     ->where('rating', '!=', self::RATING_HELPFUL);
    }

    public function scopeUnreviewed(Builder $query): Builder
    {
        return $query->whereNull('reviewed_by');
    }
}