<?php

namespace App\Modules\Chatbot\Models;

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

class ChatbotConversation extends Model
{
    protected $table = 'chatbot_conversations';

    protected $fillable = [
        'session_id',
        'visitor_name',
        'visitor_email',
        'visitor_phone',
        'visitor_city',
        'status',
        'rating',
        'rating_comment',
        'ended_at',
    ];

    protected $casts = [
        'rating' => 'integer',
        'ended_at' => 'datetime',
    ];

    /**
     * Get the messages for this conversation.
     */
    public function messages(): HasMany
    {
        return $this->hasMany(ChatbotMessage::class, 'conversation_id');
    }

    /**
     * Get or create a conversation by session ID.
     */
    public static function getOrCreateBySession(string $sessionId): self
    {
        return self::firstOrCreate(
            ['session_id' => $sessionId],
            ['session_id' => $sessionId]
        );
    }

    /**
     * Check if the conversation is active.
     */
    public function isActive(): bool
    {
        return $this->status === 'active';
    }

    /**
     * Check if the conversation is ended.
     */
    public function isEnded(): bool
    {
        return $this->status === 'ended';
    }

    /**
     * Get the conversation context as an array of messages for the API.
     */
    public function getContextForApi(int $maxMessages = 20): array
    {
        $messages = $this->messages()
            ->orderBy('created_at', 'asc')
            ->take($maxMessages)
            ->get(['role', 'content']);

        return $messages->map(fn($m) => [
            'role' => $m->role,
            'content' => $m->content,
        ])->toArray();
    }

    /**
     * Get the rating as star display text.
     */
    public function getRatingStarsAttribute(): string
    {
        if (!$this->rating) {
            return '—';
        }

        $stars = str_repeat('★', $this->rating) . str_repeat('☆', 5 - $this->rating);
        return $stars;
    }
}