package notify

import (
	"fmt"
	"time"

	"vetting/internal/config"
)

// BuildRegistry translates the config surface into a live Registry.
// Unknown notifier types produce an error so typos fail startup loudly
// rather than silently drop events.
func BuildRegistry(notifiers []config.Notifier, routes []config.Route) (*Registry, error) {
	reg := NewRegistry(10 * time.Second)
	for _, n := range notifiers {
		switch n.Type {
		case "":
			continue // skip blank entries; useful for commented-out examples
		case "ntfy":
			reg.Register(NewNtfy(n.Name, n.Server, n.Topic))
		case "discord":
			reg.Register(NewDiscord(n.Name, n.WebhookURL))
		case "smtp":
			reg.Register(NewSMTP(n.Name, n.SMTP.Host, n.SMTP.Port, n.SMTP.From, n.SMTP.To))
		default:
			return nil, fmt.Errorf("notify: unknown notifier type %q (name=%q)", n.Type, n.Name)
		}
	}
	for _, r := range routes {
		if r.Notifier == "" {
			return nil, fmt.Errorf("notify: route has no notifier name")
		}
		reg.AddRoute(Route{
			MatchKind:     toKinds(r.MatchKind),
			MatchSeverity: toSeverities(r.MatchSeverity),
			Notifier:      r.Notifier,
		})
	}
	return reg, nil
}

func toKinds(ss []string) []Kind {
	out := make([]Kind, 0, len(ss))
	for _, s := range ss {
		out = append(out, Kind(s))
	}
	return out
}

func toSeverities(ss []string) []Severity {
	out := make([]Severity, 0, len(ss))
	for _, s := range ss {
		out = append(out, Severity(s))
	}
	return out
}