package address

import "testing"

func testDictionary() *Dictionary {
	return NewDictionary([]City{
		{Name: "Новосибирск", Aliases: []string{"нск", "новосиб", "новосибирская область", "нсо"}},
		{Name: "Бердск"},
	})
}

func TestParseCityFromAliases(t *testing.T) {
	parser := NewParser(testDictionary(), "")

	tests := []struct {
		raw     string
		city    string
		nameKey string
	}{
		{"нск, 2-я Станционная улица 1", "Новосибирск", "станционная"},
		{"НСК Ленина 5", "Новосибирск", "ленина"},
		{"Новосибирская область, Станционная 1", "Новосибирск", "станционная"},
		{"Бердск, Ленина 5", "Бердск", "ленина"},
		{"г. Новосибирск, ул. Ленина 5", "Новосибирск", "ленина"},
	}
	for _, tt := range tests {
		got := parser.Parse(tt.raw)
		if got.City != tt.city {
			t.Errorf("%q: City = %q, want %q", tt.raw, got.City, tt.city)
		}
		if got.NameKey != tt.nameKey {
			t.Errorf("%q: NameKey = %q, want %q", tt.raw, got.NameKey, tt.nameKey)
		}
	}
}

func TestParseCityIsPartOfStreetKey(t *testing.T) {
	parser := NewParser(testDictionary(), "")

	nsk := parser.Parse("Новосибирск, Ленина 5")
	berdsk := parser.Parse("Бердск, Ленина 5")
	if nsk.StreetKey == berdsk.StreetKey {
		t.Fatalf("same street key for different cities: %q", nsk.StreetKey)
	}
	if nsk.CityKey != "новосибирск" || berdsk.CityKey != "бердск" {
		t.Fatalf("city keys = %q / %q", nsk.CityKey, berdsk.CityKey)
	}
}

func TestParseDefaultCity(t *testing.T) {
	parser := NewParser(testDictionary(), "Новосибирск")
	got := parser.Parse("Ленина 5")
	if got.City != "Новосибирск" || got.CityKey != "новосибирск" {
		t.Fatalf("City = %q / %q", got.City, got.CityKey)
	}

	// The default city is also recognised when the user spells it out, even
	// if the dictionary contains only aliases.
	explicit := NewParser(DefaultDictionary(), "Новосибирск").Parse("г. Новосибирск, Ленина 5")
	if explicit.City != "Новосибирск" || explicit.NameKey != "ленина" {
		t.Fatalf("explicit default city: %+v", explicit)
	}
}

func TestParseInCityOverridesDetectedCity(t *testing.T) {
	parser := NewParser(testDictionary(), "")
	got := parser.ParseInCity("Бердск, Ленина 5", "Новосибирск")
	if got.City != "Новосибирск" {
		t.Fatalf("City = %q, want forced Новосибирск", got.City)
	}
	if got.NameKey != "ленина" {
		t.Fatalf("NameKey = %q", got.NameKey)
	}
}

func TestParseWithoutCityKeepsCityKeyEmpty(t *testing.T) {
	parser := NewParser(testDictionary(), "")
	got := parser.Parse("Ленина 5")
	if got.City != "" || got.CityKey != "" {
		t.Fatalf("City = %q / %q, want empty", got.City, got.CityKey)
	}
}

func TestNormalizeTextStillLeavesUnknownCityTokens(t *testing.T) {
	// A city that is not in the dictionary must not be silently dropped: the
	// resolver should fail rather than guess another city.
	parser := NewParser(testDictionary(), "")
	got := parser.Parse("Томск, Ленина 5")
	if got.City != "" {
		t.Fatalf("City = %q, want empty for unknown city", got.City)
	}
	if got.NameKey == "ленина" {
		t.Fatalf("unknown city token disappeared from the street name")
	}
}

func TestMatchCity(t *testing.T) {
	dict := testDictionary()
	cases := []struct {
		query string
		want  string
		ok    bool
	}{
		{"нск", "Новосибирск", true},
		{"г. Новосибирск", "Новосибирск", true},
		{"Новосибирская область", "Новосибирск", true},
		{"Бердск", "Бердск", true},
		{"Бердск, Ленина 5", "", false},
		{"Томск", "", false},
	}
	for _, tt := range cases {
		got, ok := dict.MatchCity(tt.query)
		if ok != tt.ok || got.Name != tt.want {
			t.Errorf("MatchCity(%q) = %+v, %v; want %q, %v", tt.query, got, ok, tt.want, tt.ok)
		}
	}
}

func FuzzParse(f *testing.F) {
	for _, seed := range []string{
		"",
		"2-я Станционная улица 1/1 стр.",
		"нск, Ленина 5",
		"Бердск, Ленина 5 к2",
		"г. Новосибирск, ул. Кошурникова, д. 11/1 кв. 5",
		"\x00\xff",
	} {
		f.Add(seed)
	}
	parser := NewParser(testDictionary(), "")
	f.Fuzz(func(t *testing.T, raw string) {
		first := parser.Parse(raw)
		second := parser.Parse(raw)
		if first.StreetKey != second.StreetKey {
			t.Fatalf("non-deterministic street key for %q: %q vs %q", raw, first.StreetKey, second.StreetKey)
		}
		if NormalizeText(raw) != NormalizeText(NormalizeText(raw)) {
			t.Fatalf("NormalizeText is not idempotent for %q", raw)
		}
	})
}