package fees

import "testing"

func TestCalculateFee(t *testing.T) {
	t.Parallel()

	// All expected outputs verified against live Python implementation on 2026-05-06:
	//   PYTHONPATH=scripts:. python -c 'from attendance import calculate_fee; print([calculate_fee(c,m) for c,m in [(0,"2026-05"),(0,""),(1,"2026-05"),(1,"unknown"),(2,"2026-05"),(2,"2026-03"),(2,"2025-09"),(5,"2026-05"),(2,"2027-01"),(2,"")]])'
	tests := []struct {
		name  string
		count int
		month string
		want  int
	}{
		{"zero short-circuits", 0, "2026-05", 0},
		{"zero empty month", 0, "", 0},
		{"single practice", 1, "2026-05", 200},
		{"single ignores monthKey", 1, "unknown", 200},
		{"two practices configured month", 2, "2026-05", 700},
		{"two practices reduced march", 2, "2026-03", 350},
		{"two practices early season", 2, "2025-09", 750},
		{"high count same as two", 5, "2026-05", 700},
		{"unknown future month falls back", 2, "2027-01", 700},
		{"empty month falls back", 2, "", 700},
	}

	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			t.Parallel()
			got := CalculateFee(tc.count, tc.month)
			if got != tc.want {
				t.Errorf("CalculateFee(%d, %q) = %d, want %d", tc.count, tc.month, got, tc.want)
			}
		})
	}
}