package checker

import (
	"errors"
	"net/http"
	"strings"

	sdk "git.happydns.org/checker-sdk-go/checker"
)

// RenderForm exposes a single "name" input for the standalone /check route.
func (p *aliasProvider) RenderForm() []sdk.CheckerOptionField {
	return []sdk.CheckerOptionField{
		{
			Id:          "name",
			Type:        "string",
			Label:       "Domain name to check",
			Placeholder: "alias.example.com",
			Required:    true,
			Description: "Fully-qualified name carrying (or suspected of carrying) a CNAME / DNAME / ALIAS record.",
		},
	}
}

// ParseForm turns the submitted name into a minimal CheckerOptions set. We
// let the collector discover the apex on its own.
func (p *aliasProvider) ParseForm(r *http.Request) (sdk.CheckerOptions, error) {
	name := strings.TrimSpace(r.FormValue("name"))
	if name == "" {
		return nil, errors.New("name is required")
	}
	name = strings.TrimSuffix(name, ".")

	// Split into subdomain + parent-like domain_name. The collector accepts
	// either representation; we hand both keys so rules that autoscope on
	// domain_name still work.
	parts := strings.SplitN(name, ".", 2)
	sub := parts[0]
	parent := ""
	if len(parts) == 2 {
		parent = parts[1]
	} else {
		parent = name
		sub = ""
	}

	return sdk.CheckerOptions{
		"domain_name": parent,
		"subdomain":   sub,
	}, nil
}