package membership

import (
	"context"
	"io"

	domreconcile "fuj-management/go/internal/domain/reconcile"
)

// ReconcileReport loads attendance, transactions, and exceptions via s, runs
// the three-phase reconciliation, and writes the balance report to out.
// Returns ErrIOPending until real loaders are injected in M4.
func ReconcileReport(ctx context.Context, s Sources, defaultYear int, out io.Writer) error {
	members, sortedMonths, err := s.LoadAdults(ctx)
	if err != nil {
		return err
	}
	txns, err := s.LoadTransactions(ctx)
	if err != nil {
		return err
	}
	exceptions, err := s.LoadExceptions(ctx)
	if err != nil {
		return err
	}

	result := domreconcile.Reconcile(members, sortedMonths, txns, exceptions, defaultYear)
	printReconcileReport(out, result, sortedMonths)
	return nil
}