package report

import "time"

func Resolve(id ID, req ResolveRequest) (Resolved, error) {
	return DefaultRegistry().Resolve(id, req)
}

func (r Registry) Resolve(id ID, req ResolveRequest) (Resolved, error) {
	definition, err := r.Lookup(id)
	if err != nil {
		return Resolved{}, err
	}
	return r.resolveDefinition(definition, req)
}

func (r Registry) resolveDefinition(definition Definition, req ResolveRequest) (Resolved, error) {
	if req.Location == nil {
		req.Location = time.UTC
	}
	if req.Now.IsZero() {
		req.Now = time.Now()
	}
	period, err := definition.ResolvePeriod(req)
	if err != nil {
		return Resolved{}, err
	}
	return Resolved{
		Definition:  definition,
		GeneratedAt: req.Now,
		Timezone:    req.Location.String(),
		ValidPeriod: period,
	}, nil
}