package app

import (
	"context"

	"github.com/geo-platform/tenant-api/internal/ops/domain"
)

type Actor struct {
	OperatorID  int64
	Username    string
	DisplayName string
	Role        string
	IP          string
	UserAgent   string
	RequestID   string
}

func (a *Actor) audit(action, targetType string, targetID int64, metadata map[string]any) domain.AuditEvent {
	id := a.OperatorID
	var tt, ti string
	tt = targetType
	if targetID != 0 {
		ti = formatInt64(targetID)
	}
	return domain.AuditEvent{
		OperatorID:   &id,
		OperatorName: a.DisplayName,
		Action:       action,
		TargetType:   tt,
		TargetID:     ti,
		Metadata:     metadata,
		IP:           a.IP,
		UserAgent:    a.UserAgent,
		RequestID:    a.RequestID,
	}
}

type actorContextKey struct{}

func WithActor(ctx context.Context, actor *Actor) context.Context {
	return context.WithValue(ctx, actorContextKey{}, actor)
}

func ActorFromContext(ctx context.Context) *Actor {
	if actor, ok := ctx.Value(actorContextKey{}).(*Actor); ok {
		return actor
	}
	return nil
}

func formatInt64(n int64) string {
	if n == 0 {
		return ""
	}
	const digits = "0123456789"
	if n < 0 {
		return "-" + formatInt64(-n)
	}
	buf := make([]byte, 0, 20)
	for n > 0 {
		buf = append([]byte{digits[n%10]}, buf...)
		n /= 10
	}
	return string(buf)
}