package service

import (
	"context"
	"errors"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"

	"apskel-pos-be/internal/logger"
)

type missingEarnerFake struct {
	since  time.Time
	max    int
	earned int
	err    error
	calls  int
}

func (f *missingEarnerFake) EarnMissing(_ context.Context, since time.Time, maxOrders int) (int, int, error) {
	f.calls++
	f.since, f.max = since, maxOrders
	return f.earned * 2, f.earned, f.err
}

func TestEarningBackfillJob(t *testing.T) {
	logger.Setup("fatal", "json")
	now := time.Date(2026, 9, 30, 12, 0, 0, 0, time.UTC)
	earner := &missingEarnerFake{earned: 3}
	job := NewEarningBackfillJob(earner)
	job.now = func() time.Time { return now }

	assert.Equal(t, 3, job.RunOnce(context.Background()))
	assert.Equal(t, now.Add(-72*time.Hour), earner.since, "looks back three days")
	assert.Equal(t, earningBackfillMaxOrders, earner.max)

	// A failing run is logged, not fatal.
	earner.earned, earner.err = 0, errors.New("db down")
	assert.Equal(t, 0, job.RunOnce(context.Background()))

	job.Start(time.Hour)
	job.Stop()
	job.Stop()
}