package calfeed

import (
	"testing"
	"time"

	"github.com/lukaszkasprzak/lectio/internal/caldata"
	"github.com/lukaszkasprzak/lectio/internal/calendar"
)

func TestBuildThreeDayRange(t *testing.T) {
	sel := calendar.DefaultSelection()
	sel.Form = "old"
	layers := []calendar.Layer{caldata.Tridentine()}

	from := time.Date(2026, 1, 5, 0, 0, 0, 0, time.UTC)
	to := time.Date(2026, 1, 7, 0, 0, 0, 0, time.UTC)
	days := Build(from, to, "en", sel, layers, func(date time.Time, day calendar.LiturgicalDay) []calendar.Reading {
		return caldata.Readings(sel, layers, date, day)
	})

	if len(days) != 3 {
		t.Fatalf("len(days) = %d, want 3", len(days))
	}

	wantDates := []string{"2026-01-05", "2026-01-06", "2026-01-07"}
	seenWeekday := false
	feastFound := false
	for i, d := range days {
		if d.Date != wantDates[i] {
			t.Errorf("day %d: date = %q, want %q", i, d.Date, wantDates[i])
		}
		if d.Weekday != "" {
			seenWeekday = true
		}
		if d.Date == "2026-01-06" && d.Observed.Name != "" {
			feastFound = true
		}
	}
	if !seenWeekday {
		t.Errorf("expected weekday strings to be set: %+v", days)
	}
	if !feastFound {
		t.Errorf("expected Epiphany (2026-01-06) to have a non-empty Observed.Name: %+v", days)
	}
}