//go:build standalone

package checker

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

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

func (p *happyDeliverProvider) RenderForm() []sdk.CheckerOptionField {
	return []sdk.CheckerOptionField{
		{
			Id:          "domain_name",
			Type:        "string",
			Label:       "Domain name",
			Placeholder: "example.com",
			Required:    true,
			Description: "Domain whose outbound deliverability will be tested.",
		},
		{
			Id:          "happydeliver_url",
			Type:        "string",
			Label:       "happyDeliver instance URL",
			Placeholder: "https://deliver.example.org",
			Required:    true,
			Description: "Base URL of the happyDeliver API used to allocate the test address and fetch the report.",
		},
		{
			Id:          "happydeliver_token",
			Type:        "string",
			Label:       "happyDeliver API token",
			Description: "Bearer token for the happyDeliver API (optional if the instance is open).",
		},
		{
			Id:          "smtp_host",
			Type:        "string",
			Label:       "Sending SMTP host",
			Required:    true,
			Description: "Hostname or IP of the submission server used to send the test email.",
		},
		{
			Id:          "smtp_port",
			Type:        "string",
			Label:       "Sending SMTP port",
			Placeholder: "587",
			Description: "Submission port (587 for STARTTLS, 465 for implicit TLS, 25 for plain). Defaults to 587.",
		},
		{
			Id:          "smtp_tls",
			Type:        "string",
			Label:       "TLS mode",
			Placeholder: "starttls",
			Description: "How to negotiate TLS with the submission server: starttls, tls, or none. Defaults to starttls.",
		},
		{
			Id:          "smtp_username",
			Type:        "string",
			Label:       "SMTP username",
			Description: "Username used to authenticate against the submission server (optional).",
		},
		{
			Id:          "smtp_password",
			Type:        "string",
			Label:       "SMTP password",
			Description: "Password used to authenticate against the submission server (optional).",
		},
		{
			Id:          "from_address",
			Type:        "string",
			Label:       "From address",
			Placeholder: "postmaster@example.com",
			Required:    true,
			Description: "Address used in the From header of the test email. Must belong to the tested domain.",
		},
		{
			Id:          "subject_override",
			Type:        "string",
			Label:       "Subject (optional)",
			Description: "Override the default test subject.",
		},
		{
			Id:          "body_text_override",
			Type:        "string",
			Label:       "Plain-text body (optional)",
			Description: "Override the default plain-text body.",
		},
		{
			Id:          "body_html_override",
			Type:        "string",
			Label:       "HTML body (optional)",
			Description: "Override the default HTML body.",
		},
		{
			Id:          "wait_timeout",
			Type:        "string",
			Label:       "Wait timeout (s)",
			Placeholder: "900",
			Description: "Seconds to wait for happyDeliver to receive and analyse the message. Defaults to 900.",
		},
		{
			Id:          "poll_interval",
			Type:        "string",
			Label:       "Poll interval (s)",
			Placeholder: "5",
			Description: "Seconds between status polls. Clamped to [2, 60]. Defaults to 5.",
		},
	}
}

func (p *happyDeliverProvider) ParseForm(r *http.Request) (sdk.CheckerOptions, error) {
	domain := strings.TrimSuffix(strings.TrimSpace(r.FormValue("domain_name")), ".")
	if domain == "" {
		return nil, errors.New("domain_name is required")
	}

	url := strings.TrimSpace(r.FormValue("happydeliver_url"))
	if url == "" {
		return nil, errors.New("happydeliver_url is required")
	}

	smtpHost := strings.TrimSpace(r.FormValue("smtp_host"))
	if smtpHost == "" {
		return nil, errors.New("smtp_host is required")
	}

	from := strings.TrimSpace(r.FormValue("from_address"))
	if from == "" {
		return nil, errors.New("from_address is required")
	}

	opts := sdk.CheckerOptions{
		"domain_name":        domain,
		"happydeliver_url":   url,
		"happydeliver_token": strings.TrimSpace(r.FormValue("happydeliver_token")),
		"smtp_host":          smtpHost,
		"smtp_username":      strings.TrimSpace(r.FormValue("smtp_username")),
		"smtp_password":      r.FormValue("smtp_password"),
		"from_address":       from,
		"subject_override":   r.FormValue("subject_override"),
		"body_text_override": r.FormValue("body_text_override"),
		"body_html_override": r.FormValue("body_html_override"),
	}

	if v := strings.TrimSpace(r.FormValue("smtp_tls")); v != "" {
		opts["smtp_tls"] = strings.ToLower(v)
	}
	if v := strings.TrimSpace(r.FormValue("smtp_port")); v != "" {
		port, err := strconv.Atoi(v)
		if err != nil {
			return nil, errors.New("smtp_port must be a number")
		}
		opts["smtp_port"] = float64(port)
	}
	if v := strings.TrimSpace(r.FormValue("wait_timeout")); v != "" {
		n, err := strconv.Atoi(v)
		if err != nil {
			return nil, errors.New("wait_timeout must be a number")
		}
		opts["wait_timeout"] = float64(n)
	}
	if v := strings.TrimSpace(r.FormValue("poll_interval")); v != "" {
		n, err := strconv.Atoi(v)
		if err != nil {
			return nil, errors.New("poll_interval must be a number")
		}
		opts["poll_interval"] = float64(n)
	}

	return opts, nil
}