<?php

namespace App\Console\Commands;

use App\Jobs\ImportBookFromGutendex;
use App\Models\Book;
use Illuminate\Console\Command;

class SyncBookFromGutendex extends Command
{
    /**
     * The name and signature of the console command.
     *
     * @var string
     */
    protected $signature = 'gutendex:sync-book
                            {gutenberg_id : The Gutenberg book ID to import}
                            {--force : Force re-import even if book exists}
                            {--no-summary : Skip summary generation}';

    /**
     * The console command description.
     *
     * @var string
     */
    protected $description = 'Import or update a specific book from Gutendex by its ID';

    /**
     * Execute the console command.
     */
    public function handle(): int
    {
        $gutenbergId = (int) $this->argument('gutenberg_id');
        $force = $this->option('force');
        $generateSummary = !$this->option('no-summary');

        if ($gutenbergId <= 0) {
            $this->error('Invalid Gutenberg ID. Must be a positive integer.');
            return self::FAILURE;
        }

        $this->info("Syncing book from Gutendex (ID: {$gutenbergId})");
        $this->newLine();

        // Check if book already exists
        $existingBook = Book::where('gutenberg_id', $gutenbergId)->first();

        if ($existingBook && !$force) {
            $this->warn('Book already exists in the database!');
            $this->newLine();
            $this->table(
                ['Field', 'Value'],
                [
                    ['Database ID', $existingBook->id],
                    ['Title', $existingBook->title],
                    ['Author', $existingBook->author],
                    ['Slug', $existingBook->slug],
                    ['Category', $existingBook->category->name ?? 'N/A'],
                    ['Has Summary', $existingBook->summary ? 'Yes' : 'No'],
                    ['Summary Status', $existingBook->summary->processing_status ?? 'N/A'],
                ]
            );
            $this->newLine();

            if (!$this->confirm('Use --force to re-import. Continue anyway?', false)) {
                $this->info('Operation cancelled.');
                return self::SUCCESS;
            }

            // Delete existing book to re-import
            $this->warn('Deleting existing book...');
            $existingBook->delete();
            $this->info('✓ Existing book deleted.');
            $this->newLine();
        }

        // Fetch book info from Gutendex first to show details
        $this->info('Fetching book details from Gutendex...');
        $gutendexClient = app(\App\Services\GutendexClient::class);
        $gutendexBook = $gutendexClient->getBook($gutenbergId);

        if (!$gutendexBook) {
            $this->error("Failed to fetch book {$gutenbergId} from Gutendex API.");
            $this->comment('The book may not exist or the API may be unavailable.');
            return self::FAILURE;
        }

        // Display book info
        $this->info('✓ Book found on Gutendex');
        $this->newLine();
        $this->table(
            ['Field', 'Value'],
            [
                ['Gutenberg ID', $gutendexBook->id],
                ['Title', $gutendexBook->title],
                ['Author(s)', $gutendexBook->getAuthorNamesString()],
                ['Language', $gutendexBook->getPrimaryLanguage()],
                ['Public Domain', $gutendexBook->isPublicDomain() ? 'Yes' : 'No'],
                ['Plain Text Available', $gutendexBook->getPlainTextUrl() ? 'Yes' : 'No'],
                ['Download Count', number_format($gutendexBook->downloadCount)],
            ]
        );
        $this->newLine();

        // Validate book
        if (!$gutendexBook->isPublicDomain()) {
            $this->error('This book is not in the public domain and cannot be imported.');
            return self::FAILURE;
        }

        if (!$gutendexBook->getPlainTextUrl()) {
            $this->error('This book does not have a plain text version available.');
            return self::FAILURE;
        }

        // Dispatch import job
        $this->info('Dispatching import job...');
        ImportBookFromGutendex::dispatch($gutenbergId, $generateSummary);

        $this->newLine();
        $this->info('✓ Import job dispatched successfully!');
        $this->newLine();
        $this->comment('The book will be imported in the background.');
        $this->comment('Run the queue worker: php artisan queue:work');

        if ($generateSummary) {
            $this->comment('Summary will be generated automatically after import.');
        } else {
            $this->comment('Summary generation was skipped (--no-summary flag).');
        }

        return self::SUCCESS;
    }
}