package nws

import (
	"context"
	"fmt"
	"strings"

	"gitea.maximumdirect.net/ejr/feedkit/config"
	"gitea.maximumdirect.net/ejr/feedkit/event"
)

type AlertsSource struct {
	name      string
	url       string
	userAgent string
}

func NewAlertsSource(cfg config.SourceConfig) (*AlertsSource, error) {
	if strings.TrimSpace(cfg.Name) == "" {
		return nil, fmt.Errorf("nws_alerts: name is required")
	}
	if cfg.Params == nil {
		return nil, fmt.Errorf("nws_alerts %q: params are required (need params.url and params.user_agent)", cfg.Name)
	}

	// Driver-specific options live in cfg.Params to keep feedkit domain-agnostic.
	// Use the typed accessor so callers can’t accidentally pass non-strings to TrimSpace.
	url, ok := cfg.ParamString("url", "URL")
	if !ok {
		return nil, fmt.Errorf("nws_alerts %q: params.url is required", cfg.Name)
	}

	ua, ok := cfg.ParamString("user_agent", "userAgent")
	if !ok {
		return nil, fmt.Errorf("nws_alerts %q: params.user_agent is required", cfg.Name)
	}

	return &AlertsSource{
		name:      cfg.Name,
		url:       url,
		userAgent: ua,
	}, nil
}

func (s *AlertsSource) Name() string { return s.name }

// Kind is used for routing/policy.
// The envelope type is event.Event; payload will eventually be something like model.WeatherAlert.
func (s *AlertsSource) Kind() event.Kind { return event.Kind("alert") }

func (s *AlertsSource) Poll(ctx context.Context) ([]event.Event, error) {
	_ = ctx
	return nil, fmt.Errorf("nws.AlertsSource.Poll: TODO implement (url=%s)", s.url)
}