package application

import (
	"context"

	"git.cin.su/m/Assistant/contracts/epistemics"
	domain "git.cin.su/m/Assistant/modules/epistemics/domain"
)

// ReadOnlyConnector is the only integration point for web/repository sources.
// Implementations return immutable evidence; they cannot persist claims.
type ReadOnlyConnector interface {
	Collect(context.Context, epistemics.ResearchPlan) ([]epistemics.ResearchCandidate, error)
}

type ResearchService struct{ Connector ReadOnlyConnector }

func (s ResearchService) Evaluate(ctx context.Context, plan epistemics.ResearchPlan, nowUnixMillis int64) (epistemics.ResearchResult, error) {
	if s.Connector == nil {
		return epistemics.ResearchResult{}, domain.ErrNoResearchEvidence
	}
	candidates, err := s.Connector.Collect(ctx, plan)
	if err != nil {
		return epistemics.ResearchResult{}, err
	}
	return domain.EvaluateResearch(plan, candidates, nowUnixMillis)
}