// Copyright (c) The OpenTofu Authors
// SPDX-License-Identifier: MPL-2.0
// Copyright (c) 2023 HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0

package jsonfunction

import (
	"encoding/json"

	"github.com/zclconf/go-cty/cty/function"
)

// parameter represents a parameter to a function.
type parameter struct {
	// Name is an optional name for the argument.
	Name string `json:"name,omitempty"`

	// Description is an optional human-readable description
	// of the argument
	Description string `json:"description,omitempty"`

	// IsNullable is true if null is acceptable value for the argument
	IsNullable bool `json:"is_nullable,omitempty"`

	// A type that any argument for this parameter must conform to.
	// Use [marshalType] to populate this field.
	Type json.RawMessage `json:"type"`
}

func marshalParameter(p *function.Parameter) *parameter {
	if p == nil {
		return &parameter{}
	}

	return &parameter{
		Name:        p.Name,
		Description: p.Description,
		IsNullable:  p.AllowNull,
		Type:        marshalType(p.Type),
	}
}

func marshalParameters(parameters []function.Parameter) []*parameter {
	ret := make([]*parameter, len(parameters))
	for k, p := range parameters {
		ret[k] = marshalParameter(&p)
	}
	return ret
}