//go:build standalone

package checker

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

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

// RenderForm describes the standalone /check page inputs.
func (p *autoconfigProvider) RenderForm() []sdk.CheckerOptionField {
	return []sdk.CheckerOptionField{
		{
			Id:          sdk.AutoFillDomainName,
			Type:        "string",
			Label:       "Domain name",
			Placeholder: "example.com",
			Required:    true,
			Description: "Domain to probe for email autoconfiguration.",
		},
		{
			Id:          "probeEmail",
			Type:        "string",
			Label:       "Local-part used in probes",
			Placeholder: "test",
			Default:     "test",
			Description: "Local part sent in the autoconfig URL query string (before @).",
		},
		{
			Id:          "tryISPDB",
			Type:        "bool",
			Label:       "Try Mozilla ISPDB fallback",
			Default:     true,
			Description: "Probe Mozilla's public Thunderbird ISPDB when the domain itself does not publish autoconfig.",
		},
		{
			Id:          "tryHTTPAutoconfig",
			Type:        "bool",
			Label:       "Allow plain-HTTP fallback probe",
			Default:     false,
			Description: "Also attempt the plain-HTTP variant of autoconfig.<domain>.",
		},
		{
			Id:          "tryAutodiscoverPost",
			Type:        "bool",
			Label:       "Probe Microsoft Autodiscover (POST)",
			Default:     true,
			Description: "Exercise Exchange/Outlook Autodiscover endpoints as well.",
		},
	}
}

// ParseForm builds CheckerOptions from the submitted form. All probing is
// deferred to Collect, so we only validate the domain shape here.
func (p *autoconfigProvider) ParseForm(r *http.Request) (sdk.CheckerOptions, error) {
	if err := r.ParseForm(); err != nil {
		return nil, fmt.Errorf("parse form: %w", err)
	}

	domain := strings.TrimSuffix(strings.TrimSpace(r.FormValue(sdk.AutoFillDomainName)), ".")
	if domain == "" {
		return nil, errors.New("domain name is required")
	}

	opts := sdk.CheckerOptions{
		sdk.AutoFillDomainName: domain,
	}
	if v := strings.TrimSpace(r.FormValue("probeEmail")); v != "" {
		opts["probeEmail"] = v
	}

	// HTML omits unchecked boxes; treat absence as "use the documented default".
	for _, key := range []string{"tryISPDB", "tryHTTPAutoconfig", "tryAutodiscoverPost"} {
		if _, ok := r.Form[key]; !ok {
			continue
		}
		opts[key] = r.FormValue(key) == "true"
	}

	return opts, nil
}