package auth

import (
	"testing"
)

func TestHashAndCheckPassword(t *testing.T) {
	hash, err := HashPassword("testpass123")
	if err != nil {
		t.Fatalf("HashPassword: %v", err)
	}
	if hash == "" {
		t.Fatal("HashPassword returned empty string")
	}
	if hash == "testpass123" {
		t.Fatal("Hash should not equal plaintext")
	}

	// Correct password
	if !CheckPassword(hash, "testpass123") {
		t.Error("CheckPassword should return true for correct password")
	}

	// Wrong password
	if CheckPassword(hash, "wrongpassword") {
		t.Error("CheckPassword should return false for wrong password")
	}

	// Empty password
	if CheckPassword(hash, "") {
		t.Error("CheckPassword should return false for empty password")
	}
}

func TestValidateName(t *testing.T) {
	tests := []struct {
		name    string
		wantErr bool
	}{
		{"Alice", false},
		{"Bob Smith", false},
		{"user-1", false},
		{"user_2", false},
		{"test.user", false},
		{"CoolDude99", false},

		// Too short
		{"A", true},
		{"", true},

		// Reserved
		{"GUEST", true},
		{"guest", true},
		{"NEW", true},
		{"new", true},
		{"SYSOP", true},
		{"sysop", true},

		// No letters
		{"123", true},
		{"---", true},

		// Invalid characters
		{"user@name", true},
		{"user!name", true},
		{"user/name", true},
		{"user<script>", true},
	}

	for _, tt := range tests {
		err := validateName(tt.name)
		if tt.wantErr && err == nil {
			t.Errorf("validateName(%q) = nil, want error", tt.name)
		}
		if !tt.wantErr && err != nil {
			t.Errorf("validateName(%q) = %v, want nil", tt.name, err)
		}
	}
}