package dav

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

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

func UserOptions() []sdk.CheckerOptionDocumentation {
	return []sdk.CheckerOptionDocumentation{
		{
			Id:          "username",
			Type:        "string",
			Label:       "Username",
			Description: "Optional. Supplying credentials unlocks authenticated checks (principal, home-set, collections, report probe).",
		},
		{
			Id:          "password",
			Type:        "string",
			Label:       "Password or token",
			Description: "Optional. Paired with the username for HTTP Basic authentication.",
			Secret:      true,
		},
		{
			Id:          "context_url",
			Type:        "string",
			Label:       "Explicit context URL",
			Description: "Optional. Bypasses /.well-known and SRV discovery. Use for servers with a non-standard layout.",
			Placeholder: "https://dav.example.com/caldav/",
		},
	}
}

func DomainOptions() []sdk.CheckerOptionDocumentation {
	return []sdk.CheckerOptionDocumentation{
		{
			Id:       "domain_name",
			Label:    "Domain name",
			AutoFill: sdk.AutoFillDomainName,
		},
	}
}

func RunOptions() []sdk.CheckerOptionDocumentation {
	return []sdk.CheckerOptionDocumentation{
		{
			Id:          "timeout_seconds",
			Type:        "number",
			Label:       "Timeout (seconds)",
			Description: "Per-request HTTP timeout.",
			Default:     float64(10),
		},
	}
}

// InteractiveForm mirrors UserOptions+DomainOptions+RunOptions for the
// standalone /check page. Discovery happens inside Collect, so all the
// human owes us is the domain.
func InteractiveForm() []sdk.CheckerOptionField {
	return []sdk.CheckerOptionField{
		{
			Id:          "domain_name",
			Type:        "string",
			Label:       "Domain name",
			Placeholder: "example.com",
			Required:    true,
		},
		{
			Id:          "username",
			Type:        "string",
			Label:       "Username",
			Description: "Optional. Supplying credentials unlocks authenticated checks.",
		},
		{
			Id:          "password",
			Type:        "string",
			Label:       "Password or token",
			Description: "Optional. Paired with the username for HTTP Basic auth.",
			Secret:      true,
		},
		{
			Id:          "context_url",
			Type:        "string",
			Label:       "Explicit context URL",
			Description: "Optional. Bypasses /.well-known and SRV discovery.",
			Placeholder: "https://dav.example.com/caldav/",
		},
		{
			Id:          "timeout_seconds",
			Type:        "number",
			Label:       "Timeout (seconds)",
			Description: "Per-request HTTP timeout.",
			Default:     float64(10),
		},
	}
}

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

	opts := sdk.CheckerOptions{"domain_name": domain}
	if v := strings.TrimSpace(r.FormValue("username")); v != "" {
		opts["username"] = v
	}
	if v := r.FormValue("password"); v != "" {
		opts["password"] = v
	}
	if v := strings.TrimSpace(r.FormValue("context_url")); v != "" {
		opts["context_url"] = v
	}
	if v := strings.TrimSpace(r.FormValue("timeout_seconds")); v != "" {
		f, err := strconv.ParseFloat(v, 64)
		if err != nil {
			return nil, errors.New("timeout must be a number")
		}
		opts["timeout_seconds"] = f
	}
	return opts, nil
}