/*
    ptrnt - print labels on linux
    Copyright (C) 2025  Moritz Martinius

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.

 */

#include <gmock/gmock.h>
#include <gtest/gtest.h>

#include <memory>
#include <vector>

#include "core/PrinterDriverFactory.hpp"
#include "core/PrinterService.hpp"

using ::testing::_;
using ::testing::NiceMock;
using ::testing::Return;

namespace ptprnt::core {

// Test fixture for PrinterService tests
class PrinterServiceTest : public ::testing::Test {
   protected:
    void SetUp() override {
        // Service under test
        service = std::make_unique<PrinterService>();
    }

    void TearDown() override { service.reset(); }

    std::unique_ptr<PrinterService> service;
};

// Test: PrinterService initialization
TEST_F(PrinterServiceTest, InitializeSuccess) {
    // PrinterService::initialize() calls UsbDeviceFactory::init()
    // This will attempt to initialize libusb - we can't easily mock this
    // without dependency injection, but we can test the call succeeds
    // when libusb is available
    EXPECT_TRUE(service->initialize());
}

// Test: Detect printers when none are connected
TEST_F(PrinterServiceTest, DetectPrintersNoneFound) {
    service->initialize();

    auto printers = service->detectPrinters();

    // With no compatible USB devices, we should get an empty list
    // (This depends on actual USB devices present, so it might find real hardware)
    // In a real test environment without hardware, this should be empty
    EXPECT_GE(printers.size(), 0);  // Non-negative count
}

// Test: Select printer with auto-detect
TEST_F(PrinterServiceTest, SelectPrinterAuto) {
    service->initialize();
    service->detectPrinters();

    auto printer = service->selectPrinter("auto");

    // This will be nullptr if no printers detected
    // In test environment without hardware, expect nullptr
    // (Test passes either way - just exercises the code path)
    if (printer != nullptr) {
        EXPECT_NE(printer, nullptr);
        EXPECT_EQ(service->getCurrentPrinter(), printer);
    } else {
        EXPECT_EQ(printer, nullptr);
    }
}

// Test: Select non-existent printer
TEST_F(PrinterServiceTest, SelectPrinterNotFound) {
    service->initialize();
    service->detectPrinters();

    auto printer = service->selectPrinter("NonExistentPrinter");

    EXPECT_EQ(printer, nullptr);
    EXPECT_EQ(service->getCurrentPrinter(), nullptr);
}

// Test: Get current printer when none selected
TEST_F(PrinterServiceTest, GetCurrentPrinterNoneSelected) {
    EXPECT_EQ(service->getCurrentPrinter(), nullptr);
}

// Test: Print label without selecting printer
TEST_F(PrinterServiceTest, PrintLabelNoPrinterSelected) {
    // Create a simple label (we need a valid ILabel pointer)
    std::unique_ptr<graphics::ILabel> label = nullptr;  // nullptr label for this test

    bool result = service->printLabel(std::move(label));

    // Should fail because no printer is selected
    EXPECT_FALSE(result);
}

}  // namespace ptprnt::core