package robot

// Robot display names are composed, not hand-listed. Per language there is a pool of
// 32 full first names and a paired pool of 32 colloquial forms (William/Bill,
// Анастасия/Настя), a surname pool, and three rendering forms: first name only;
// first name plus a surname initial; first name plus full surname. Because robots are
// durable accounts whose name must stay stable across restarts (a player's opponent
// must not rename itself on every deploy, nor mid-game), the composition is
// deterministic per pool slot — seeded by the slot index through mix — rather than
// re-randomised each boot. Russian surnames are gender-agreed with the first name.

// robotPoolSize is the number of robot accounts provisioned per language. It equals
// the first-name pool size, so each slot draws a distinct person.
const robotPoolSize = 32

// latinShareInRussian is the approximate percentage of Russian-variant games that
// draw a Latin-named robot rather than a Russian-named one (the owner's "≤20%").
const latinShareInRussian = 20

// name composition forms.
const (
	nameFormFirstOnly = iota // "Anna"
	nameFormInitial          // "Anna C."
	nameFormFull             // "Anna Carter"
)

// genderedName is a Russian first name tagged by grammatical gender so the surname
// form (masculine vs feminine) can agree with it.
type genderedName struct {
	name   string
	female bool
}

// surnamePair holds a Russian surname's masculine and feminine forms.
type surnamePair struct{ m, f string }

// firstNamesFullEN and firstNamesShortEN are paired by index: the same person's
// official and colloquial English first name (William/Bill).
var firstNamesFullEN = []string{
	"William", "Robert", "Thomas", "Nicholas", "Joseph", "Edward", "Charles", "Margaret",
	"Elizabeth", "Katherine", "Alexander", "Samuel", "Andrew", "Christopher", "Benjamin", "Daniel",
	"Matthew", "Anthony", "Michael", "Richard", "Jonathan", "Patricia", "Jennifer", "Jessica",
	"Stephanie", "Victoria", "Theodore", "Frederick", "Gabriel", "Vincent", "Eleanor", "Josephine",
}

var firstNamesShortEN = []string{
	"Will", "Bob", "Tom", "Nick", "Joe", "Eddie", "Charlie", "Maggie",
	"Liz", "Kate", "Alex", "Sam", "Drew", "Chris", "Ben", "Dan",
	"Matt", "Tony", "Mike", "Rick", "Jon", "Pat", "Jen", "Jess",
	"Steph", "Vicky", "Ted", "Fred", "Gabe", "Vince", "Ellie", "Josie",
}

// surnamesEN is a pool of gender-neutral English surnames.
var surnamesEN = []string{
	"Carter", "Hayes", "Brooks", "Reed", "Cole", "Lane", "Bishop", "Hart",
	"Shaw", "Wells", "Pierce", "Wade", "Frost", "Doyle", "Boyd", "Marsh",
	"Hale", "Nash", "Webb", "Dale", "Park", "Lyon", "Snow", "Cross",
	"Vance", "Knox", "Page", "Ford", "Banks", "Foster", "Greer", "Mills",
}

// firstNamesFullRU and firstNamesShortRU are paired by index: the same person's
// official and colloquial Russian first name (Анастасия/Настя), gender-tagged.
var firstNamesFullRU = []genderedName{
	{"Александр", false}, {"Дмитрий", false}, {"Сергей", false}, {"Алексей", false},
	{"Михаил", false}, {"Николай", false}, {"Владимир", false}, {"Константин", false},
	{"Павел", false}, {"Григорий", false}, {"Андрей", false}, {"Иван", false},
	{"Пётр", false}, {"Роман", false}, {"Антон", false}, {"Евгений", false},
	{"Анна", true}, {"Мария", true}, {"Анастасия", true}, {"Наталья", true},
	{"Татьяна", true}, {"Екатерина", true}, {"Юлия", true}, {"Ольга", true},
	{"Елена", true}, {"Ирина", true}, {"Светлана", true}, {"Полина", true},
	{"Дарья", true}, {"София", true}, {"Алина", true}, {"Вера", true},
}

var firstNamesShortRU = []genderedName{
	{"Саша", false}, {"Дима", false}, {"Серёжа", false}, {"Лёша", false},
	{"Миша", false}, {"Коля", false}, {"Володя", false}, {"Костя", false},
	{"Паша", false}, {"Гриша", false}, {"Андрюша", false}, {"Ваня", false},
	{"Петя", false}, {"Рома", false}, {"Антоша", false}, {"Женя", false},
	{"Аня", true}, {"Маша", true}, {"Настя", true}, {"Наташа", true},
	{"Таня", true}, {"Катя", true}, {"Юля", true}, {"Оля", true},
	{"Лена", true}, {"Ира", true}, {"Света", true}, {"Поля", true},
	{"Даша", true}, {"Соня", true}, {"Аля", true}, {"Верочка", true},
}

// surnamesRU is a pool of common Russian surnames in masculine and feminine forms.
var surnamesRU = []surnamePair{
	{"Иванов", "Иванова"}, {"Смирнов", "Смирнова"}, {"Кузнецов", "Кузнецова"},
	{"Соколов", "Соколова"}, {"Попов", "Попова"}, {"Лебедев", "Лебедева"},
	{"Новиков", "Новикова"}, {"Морозов", "Морозова"}, {"Волков", "Волкова"},
	{"Зайцев", "Зайцева"}, {"Павлов", "Павлова"}, {"Беляев", "Беляева"},
	{"Орлов", "Орлова"}, {"Громов", "Громова"}, {"Суханов", "Суханова"},
	{"Киселёв", "Киселёва"}, {"Макаров", "Макарова"}, {"Фёдоров", "Фёдорова"},
	{"Никитин", "Никитина"}, {"Захаров", "Захарова"}, {"Борисов", "Борисова"},
	{"Королёв", "Королёва"}, {"Герасимов", "Герасимова"}, {"Пономарёв", "Пономарёва"},
	{"Григорьев", "Григорьева"}, {"Романов", "Романова"}, {"Виноградов", "Виноградова"},
	{"Богданов", "Богданова"}, {"Воробьёв", "Воробьёва"}, {"Сергеев", "Сергеева"},
	{"Кузьмин", "Кузьмина"}, {"Соловьёв", "Соловьёва"},
}

// robotDisplayNamesEN builds the English robot display-name pool, one per slot. Each
// slot draws its paired full or colloquial first name, a surname, and a form.
func robotDisplayNamesEN() []string {
	out := make([]string, robotPoolSize)
	for i := range out {
		h := mix(int64(i), "robot-en")
		first := firstNamesFullEN[i%len(firstNamesFullEN)]
		if (h>>16)&1 == 1 {
			first = firstNamesShortEN[i%len(firstNamesShortEN)]
		}
		surname := surnamesEN[h%uint64(len(surnamesEN))]
		out[i] = composeName(first, surname, int((h>>8)%3))
	}
	return out
}

// robotDisplayNamesRU builds the Russian robot display-name pool, one per slot, with
// the surname form agreeing with the first name's gender.
func robotDisplayNamesRU() []string {
	out := make([]string, robotPoolSize)
	for i := range out {
		h := mix(int64(i), "robot-ru")
		fn := firstNamesFullRU[i%len(firstNamesFullRU)]
		if (h>>16)&1 == 1 {
			fn = firstNamesShortRU[i%len(firstNamesShortRU)]
		}
		sp := surnamesRU[h%uint64(len(surnamesRU))]
		surname := sp.m
		if fn.female {
			surname = sp.f
		}
		out[i] = composeName(fn.name, surname, int((h>>8)%3))
	}
	return out
}

// composeName renders one of the three name forms from a first name and a surname.
func composeName(first, surname string, form int) string {
	switch form {
	case nameFormInitial:
		return first + " " + string([]rune(surname)[:1]) + "."
	case nameFormFull:
		return first + " " + surname
	default:
		return first
	}
}
