/*
    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/>.

 */

#pragma once

#include <cstdint>
#include <memory>
#include <vector>

#include "graphics/Bitmap.hpp"
#include "interface/IPrinterDriver.hpp"
#include "interface/IPrinterTypes.hpp"
#include "libusbwrap/LibUsbTypes.hpp"
#include "libusbwrap/interface/IUsbDevice.hpp"

namespace ptprnt::printer {

/**
 * @brief Virtual printer driver for testing without hardware
 *
 * FakePrinter simulates a real label printer by processing bitmap data
 * column by column and reconstructing it into a new bitmap, mimicking
 * the physical printing process of label printers.
 */
class FakePrinter : public ::ptprnt::IPrinterDriver {
   public:
    FakePrinter()           = default;
    ~FakePrinter() override = default;

    FakePrinter(const FakePrinter&)            = delete;
    FakePrinter& operator=(const FakePrinter&) = delete;
    FakePrinter(FakePrinter&&)                 = default;
    FakePrinter& operator=(FakePrinter&&)      = default;

    // Printer info - static to be accessed without instantiation
    static const PrinterInfo mInfo;

    // IPrinterDriver interface
    [[nodiscard]] std::string_view getDriverName() override;
    [[nodiscard]] std::string_view getName() override;
    [[nodiscard]] libusbwrap::usbId getUsbId() override;
    [[nodiscard]] std::string_view getVersion() override;
    [[nodiscard]] PrinterInfo getPrinterInfo() override;
    [[nodiscard]] PrinterStatus getPrinterStatus() override;
    bool attachUsbDevice(std::shared_ptr<libusbwrap::IUsbDevice> usbHndl) override;
    bool detachUsbDevice() override;
    bool printBitmap(const graphics::Bitmap<graphics::ALPHA8>& bitmap) override;
    bool printMonochromeData(const graphics::MonochromeData& data) override;
    bool printLabel(const std::unique_ptr<graphics::ILabel> label) override;
    bool print() override;

    /**
     * @brief Get the last printed bitmap
     * @return The reconstructed bitmap from simulated printing
     */
    [[nodiscard]] const graphics::Bitmap<graphics::ALPHA8>& getLastPrint() const;

    /**
     * @brief Save the last print to a PNG file
     * @param filename Path to save the PNG
     * @return true if successful
     */
    bool saveLastPrintToPng(const std::string& filename) const;

   private:
    /**
     * @brief Simulate printing by reconstructing bitmap column by column
     * @param data Monochrome data to "print"
     * @return Reconstructed bitmap
     */
    graphics::Bitmap<graphics::ALPHA8> simulatePrinting(const graphics::MonochromeData& data);

    /**
     * @brief Save bitmap to PNG file using Cairo
     * @param bitmap The bitmap to save
     * @param filename Output filename
     * @return true if successful
     */
    bool saveBitmapToPng(const graphics::Bitmap<graphics::ALPHA8>& bitmap, const std::string& filename) const;

    /**
     * @brief Generate timestamped filename for fake label output
     * @return Filename like "fakelabel_20231011_123456.png"
     */
    std::string generateTimestampedFilename() const;

    std::unique_ptr<graphics::Bitmap<graphics::ALPHA8>> mLastPrint;
    bool mHasAttachedDevice = false;
    PrinterStatus mStatus{.tapeWidthMm = 12};  // Default to 12mm tape
};

}  // namespace ptprnt::printer