<?php

declare(strict_types=1);

namespace App\Services;

use App\Contracts\Action;
use App\Contracts\ActionInput;
use App\Contracts\Executor;
use App\Contracts\Query;
use App\Contracts\QueryInput;
use Illuminate\Support\Facades\DB;
use Override;
use Psr\Log\LoggerInterface;

final class ActionExecutorService implements Executor
{
    public function __construct(
        private readonly ?LoggerInterface $logger = null,
    ) {
    }

    #[Override]
    public function execute(Action | Query $executable, ActionInput | QueryInput $input): mixed
    {
        $executableClass = $executable::class;
        $actionName      = class_basename($executableClass);
        $type            = $executable instanceof Action ? 'Action' : 'Query';

        $this->logger?->info("[{$type}] Executing {$actionName}", [
            'action' => $executableClass,
            'input'  => $input::class,
        ]);

        try {
            if ($executable instanceof Action) {
                $this->assertInputIsAction($input);

                return $this->executeWithinTransaction(
                    $executable,
                    $input,
                    $actionName
                );
            }

            $this->assertInputIsQuery($input);

            return $this->executeWithoutTransaction(
                $executable,
                $input,
                $actionName
            );
        } catch (\Throwable $e) {
            $this->logger?->error("[{$type}] Failed {$actionName}: {$e->getMessage()}", [
                'action'    => $executableClass,
                'input'     => $input::class,
                'message'   => $e->getMessage(),
                'exception' => $e,
            ]);

            throw $e;
        }
    }

    /**
     * @template TQuery of Query
     * @template TQueryInput of QueryInput
     *
     * @param  TQuery  $executable
     * @param  TQueryInput  $input
     */
    private function executeWithoutTransaction(Query $executable, QueryInput $input, string $actionName): mixed
    {
        $result = $executable($input);

        $this->logger?->info("[Query] Succeeded {$actionName}");

        return $result;
    }

    /**
     * @template TAction of Action
     * @template TActionInput of ActionInput
     *
     * @param  TAction  $executable
     * @param  TActionInput  $input
     */
    private function executeWithinTransaction(Action $executable, ActionInput $input, string $actionName): mixed
    {
        return DB::transaction(function () use ($executable, $input, $actionName): mixed {
            $result = $executable($input);

            $this->logger?->info("[Action] Succeeded {$actionName}");

            return $result;
        });
    }

    /**
     * @psalm-assert QueryInput $input
     */
    private function assertInputIsQuery(mixed $input): void
    {
        if (! $input instanceof QueryInput) {
            throw new \InvalidArgumentException('Input must be an instance of QueryInput.');
        }
    }

    /**
     * @psalm-assert ActionInput $input
     */
    private function assertInputIsAction(mixed $input): void
    {
        if (! $input instanceof ActionInput) {
            throw new \InvalidArgumentException('Input must be an instance of ActionInput.');
        }
    }
}