class Invocation

final class Invocation implements SelfDescribing {
    
    /**
     * @psalm-var class-string
     */
    private readonly string $className;
    
    /**
     * @psalm-var non-empty-string
     */
    private readonly string $methodName;
    private readonly array $parameters;
    private readonly string $returnType;
    private readonly bool $isReturnTypeNullable;
    private readonly bool $proxiedCall;
    private readonly MockObjectInternal|StubInternal $object;
    
    /**
     * @psalm-param class-string $className
     * @psalm-param non-empty-string $methodName
     */
    public function __construct(string $className, string $methodName, array $parameters, string $returnType, MockObjectInternal|StubInternal $object, bool $cloneObjects = false, bool $proxiedCall = false) {
        $this->className = $className;
        $this->methodName = $methodName;
        $this->object = $object;
        $this->proxiedCall = $proxiedCall;
        if (strtolower($methodName) === '__tostring') {
            $returnType = 'string';
        }
        if (str_starts_with($returnType, '?')) {
            $returnType = substr($returnType, 1);
            $this->isReturnTypeNullable = true;
        }
        else {
            $this->isReturnTypeNullable = false;
        }
        $this->returnType = $returnType;
        if (!$cloneObjects) {
            $this->parameters = $parameters;
            return;
        }
        foreach ($parameters as $key => $value) {
            if (is_object($value)) {
                $parameters[$key] = Cloner::clone($value);
            }
        }
        $this->parameters = $parameters;
    }
    
    /**
     * @psalm-return class-string
     */
    public function className() : string {
        return $this->className;
    }
    
    /**
     * @psalm-return non-empty-string
     */
    public function methodName() : string {
        return $this->methodName;
    }
    public function parameters() : array {
        return $this->parameters;
    }
    
    /**
     * @throws Exception
     */
    public function generateReturnValue() : mixed {
        if ($this->returnType === 'never') {
            throw new NeverReturningMethodException($this->className, $this->methodName);
        }
        if ($this->isReturnTypeNullable || $this->proxiedCall) {
            return null;
        }
        return (new ReturnValueGenerator())->generate($this->className, $this->methodName, $this->object::class, $this->returnType);
    }
    public function toString() : string {
        $exporter = new Exporter();
        return sprintf('%s::%s(%s)%s', $this->className, $this->methodName, implode(', ', array_map([
            $exporter,
            'shortenedExport',
        ], $this->parameters)), $this->returnType ? sprintf(': %s', $this->returnType) : '');
    }
    public function object() : MockObjectInternal|StubInternal {
        return $this->object;
    }

}