package auth

import "testing"

func TestValidator_IsValid(t *testing.T) {
	t.Parallel()

	validator, err := NewValidator([]string{"token-one", "token-two", "token-three"})
	if err != nil {
		t.Fatalf("NewValidator() error = %v", err)
	}

	tests := []struct {
		name  string
		token string
		want  bool
	}{
		{name: "valid token one", token: "token-one", want: true},
		{name: "valid token two", token: "token-two", want: true},
		{name: "unknown token", token: "wrong-token", want: false},
		{name: "empty token", token: "", want: false},
		{name: "whitespace token", token: "   ", want: false},
	}

	for _, tc := range tests {
		tc := tc
		t.Run(tc.name, func(t *testing.T) {
			t.Parallel()
			if got := validator.IsValid(tc.token); got != tc.want {
				t.Fatalf("IsValid() = %v, want %v", got, tc.want)
			}
		})
	}
}

func TestNewValidator_EmptyTokenSet(t *testing.T) {
	t.Parallel()

	if _, err := NewValidator(nil); err == nil {
		t.Fatal("NewValidator(nil) expected error, got nil")
	}

	if _, err := NewValidator([]string{"", "   "}); err == nil {
		t.Fatal("NewValidator(empty tokens) expected error, got nil")
	}
}

func TestParseBearerToken(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name    string
		header  string
		want    string
		wantErr bool
	}{
		{name: "valid bearer", header: "Bearer abc123", want: "abc123"},
		{name: "valid lowercase prefix", header: "bearer abc123", want: "abc123"},
		{name: "valid uppercase prefix", header: "BEARER abc123", want: "abc123"},
		{name: "missing header", header: "", wantErr: true},
		{name: "wrong scheme", header: "Basic abc123", wantErr: true},
		{name: "missing token", header: "Bearer", wantErr: true},
		{name: "too many parts", header: "Bearer one two", wantErr: true},
	}

	for _, tc := range tests {
		tc := tc
		t.Run(tc.name, func(t *testing.T) {
			t.Parallel()
			got, err := ParseBearerToken(tc.header)
			if tc.wantErr {
				if err == nil {
					t.Fatal("ParseBearerToken() expected error, got nil")
				}
				return
			}

			if err != nil {
				t.Fatalf("ParseBearerToken() error = %v", err)
			}

			if got != tc.want {
				t.Fatalf("ParseBearerToken() = %q, want %q", got, tc.want)
			}
		})
	}
}