package credentials

import (
	"strings"
	"testing"
)

func TestIsValidEmail(t *testing.T) {
	tests := []struct {
		email string
		want  bool
	}{
		{email: "a@example.com", want: true},
		{email: "user.name+tag@example.co.uk", want: true},
		{email: "", want: false},
		{email: "plainaddress", want: false},
		{email: "user@localhost", want: false},
		{email: "user@example", want: false},
	}

	for _, tc := range tests {
		if got := IsValidEmail(tc.email); got != tc.want {
			t.Fatalf("IsValidEmail(%q) = %v, want %v", tc.email, got, tc.want)
		}
	}
}

func TestIsValidUsername(t *testing.T) {
	tests := []struct {
		username string
		want     bool
	}{
		{username: "abc", want: true},
		{username: "user_name-1", want: true},
		{username: "ab", want: false},
		{username: "this_username_is_way_too_long_for_rules", want: false},
		{username: "user..name", want: false},
		{username: "user__name", want: false},
		{username: "user--name", want: false},
		{username: "user name", want: false},
	}

	for _, tc := range tests {
		if got := IsValidUsername(tc.username); got != tc.want {
			t.Fatalf("IsValidUsername(%q) = %v, want %v", tc.username, got, tc.want)
		}
	}
}

func TestIsValidPassword(t *testing.T) {
	longerThan72 := "A1" + strings.Repeat("x", 71)
	exactly72 := "A1" + strings.Repeat("x", 70)
	tests := []struct {
		password string
		want     bool
	}{
		{password: "LongPassword1", want: true},
		{password: "abcdefghijk1", want: true},
		{password: exactly72, want: true},
		{password: longerThan72, want: false},
		{password: "123456789012", want: false},
		{password: "OnlyLettersAB", want: false},
		{password: "short1A", want: false},
	}

	for _, tc := range tests {
		if got := IsValidPassword(tc.password); got != tc.want {
			t.Fatalf("IsValidPassword(%q) = %v, want %v", tc.password, got, tc.want)
		}
	}
}