<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Summary extends Model
{
    protected $fillable = [
        'content',
        'key_insights',
        'book_id',
        'processing_status',
        'processing_error',
        'processed_at',
        'model_used',
    ];

    /**
     * Get the attributes that should be cast.
     */
    protected function casts(): array
    {
        return [
            'processed_at' => 'datetime',
        ];
    }

    /**
     * Get the book that owns the summary.
     */
    public function book()
    {
        return $this->belongsTo(Book::class);
    }

    /**
     * Scope a query to only include summaries with a specific status.
     */
    public function scopeWithStatus($query, string $status)
    {
        return $query->where('processing_status', $status);
    }

    /**
     * Scope a query to only include pending summaries.
     */
    public function scopePending($query)
    {
        return $query->where('processing_status', 'pending');
    }

    /**
     * Scope a query to only include processing summaries.
     */
    public function scopeProcessing($query)
    {
        return $query->where('processing_status', 'processing');
    }

    /**
     * Scope a query to only include completed summaries.
     */
    public function scopeCompleted($query)
    {
        return $query->where('processing_status', 'completed');
    }

    /**
     * Scope a query to only include failed summaries.
     */
    public function scopeFailed($query)
    {
        return $query->where('processing_status', 'failed');
    }

    /**
     * Mark the summary as processing.
     */
    public function markAsProcessing(): void
    {
        $this->update([
            'processing_status' => 'processing',
            'processing_error' => null,
        ]);
    }

    /**
     * Mark the summary as completed.
     */
    public function markAsCompleted(string $modelUsed): void
    {
        $this->update([
            'processing_status' => 'completed',
            'processing_error' => null,
            'processed_at' => now(),
            'model_used' => $modelUsed,
        ]);
    }

    /**
     * Mark the summary as failed with an error message.
     */
    public function markAsFailed(string $error): void
    {
        $this->update([
            'processing_status' => 'failed',
            'processing_error' => $error,
        ]);
    }
}