package inflation

import (
	"testing"
)

// This is your first Go test file!
// Run with: go test ./internal/inflation/...
// Go's testing package is built-in — no extra library needed.

func TestMatcher_ExactMatch(t *testing.T) {
	m := NewMatcher()

	tests := []struct {
		raw      string
		expected string
	}{
		{"whole milk gallon", "milk_whole_1gal"},
		{"large eggs 12ct", "eggs_large_dozen"},
		{"white bread", "bread_white_loaf"},
		{"ground beef", "ground_beef_1lb"},
	}

	for _, tt := range tests {
		t.Run(tt.raw, func(t *testing.T) {
			got := m.Match(tt.raw)
			if got != tt.expected {
				t.Errorf("Match(%q) = %q, want %q", tt.raw, got, tt.expected)
			}
		})
	}
}

func TestMatcher_CaseInsensitive(t *testing.T) {
	m := NewMatcher()
	got := m.Match("WHOLE MILK GALLON")
	if got != "milk_whole_1gal" {
		t.Errorf("expected milk_whole_1gal, got %q", got)
	}
}

func TestMatcher_TokenOverlap(t *testing.T) {
	m := NewMatcher()
	// "MILK WHL 1 GAL" should still match via token overlap
	got := m.Match("MILK WHL 1 GAL")
	if got != "milk_whole_1gal" {
		t.Logf("Note: token overlap match returned %q (may need alias tuning)", got)
	}
}

func TestMatcher_NoMatch(t *testing.T) {
	m := NewMatcher()
	got := m.Match("toilet paper mega roll 12ct")
	if got != "" {
		t.Errorf("expected no match, got %q", got)
	}
}

func TestNormalize(t *testing.T) {
	tests := []struct {
		input    string
		expected string
	}{
		{"Whole Milk, 1 Gal.", "whole milk 1 gal"},
		{"EGGS (LARGE) 12CT", "eggs large 12ct"},
		{"80/20 Ground Beef", "80/20 ground beef"},
	}

	for _, tt := range tests {
		got := normalize(tt.input)
		if got != tt.expected {
			t.Errorf("normalize(%q) = %q, want %q", tt.input, got, tt.expected)
		}
	}
}