package qso

import (
	"testing"
	"time"
)

func tm(s string) time.Time {
	t, _ := time.Parse("2006-01-02T15:04", s)
	return t
}

func TestMatchIndexWindowAndMode(t *testing.T) {
	idx := &MatchIndex{byMode: map[string][]matchRef{}}
	// Local log: a CW QSO, an SSB (logged as USB) QSO, and an FT8 QSO.
	idx.Add("4Z4DX", "15m", "CW", tm("2026-06-20T10:13"), 1)
	idx.Add("V85NPV", "15m", "USB", tm("2025-04-18T17:01"), 2)
	idx.Add("DK0SWL", "20m", "FT8", tm("2026-03-01T09:00"), 3)

	win := 10 * time.Minute
	cases := []struct {
		name             string
		call, band, mode string
		when             string
		wantID           int64
		wantOK           bool
	}{
		{"exact", "4Z4DX", "15m", "CW", "2026-06-20T10:13", 1, true},
		{"1-min drift", "4Z4DX", "15m", "CW", "2026-06-20T10:12", 1, true},
		{"9-min drift ok", "4Z4DX", "15m", "CW", "2026-06-20T10:04", 1, true},
		{"30-min drift misses", "4Z4DX", "15m", "CW", "2026-06-20T10:43", 0, false},
		// Phone sidebands are interchangeable: an SSB confirmation matches a USB log.
		{"SSB conf vs USB log", "V85NPV", "15m", "SSB", "2025-04-18T17:00", 2, true},
		{"LSB conf vs USB log", "V85NPV", "15m", "LSB", "2025-04-18T17:00", 2, true},
		// But a digital/phone mismatch does NOT match (exact for non-phone).
		{"FT8 conf vs SSB log misses", "V85NPV", "15m", "FT8", "2025-04-18T17:00", 0, false},
		// Digital is exact: FT8 matches FT8, but FT4 would not.
		{"FT8 exact", "DK0SWL", "20m", "FT8", "2026-03-01T09:01", 3, true},
		{"FT4 vs FT8 misses", "DK0SWL", "20m", "FT4", "2026-03-01T09:01", 0, false},
		{"wrong band misses", "DK0SWL", "40m", "FT8", "2026-03-01T09:01", 0, false},
		{"unknown call misses", "N0CALL", "15m", "CW", "2026-06-20T10:13", 0, false},
	}
	for _, c := range cases {
		id, ok := idx.Match(c.call, c.band, c.mode, tm(c.when), win)
		if ok != c.wantOK || (ok && id != c.wantID) {
			t.Errorf("%s: got (id=%d ok=%v), want (id=%d ok=%v)", c.name, id, ok, c.wantID, c.wantOK)
		}
	}
}