/* 
    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 <pango/pangocairo.h>

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

#include "cairo.h"
#include "graphics/interface/ILabel.hpp"
#include "pango/pango-types.h"

namespace ptprnt::graphics {

// Forward declaration
class ICairoWrapper;

// Custom deleters for Cairo/Pango resources that use the wrapper
// Implementation in Label.cpp to avoid incomplete type issues
struct CairoSurfaceDeleter {
    std::shared_ptr<ICairoWrapper> wrapper;
    void operator()(cairo_surface_t* surface) const;
};

struct CairoDeleter {
    std::shared_ptr<ICairoWrapper> wrapper;
    void operator()(cairo_t* cr) const;
};

struct GObjectDeleter {
    std::shared_ptr<ICairoWrapper> wrapper;
    void operator()(gpointer obj) const;
};

class Label : public ILabel {
   public:
    // Default constructor using real Cairo/Pango implementation
    explicit Label(uint16_t heightPixel);

    // Constructor for dependency injection (testing)
    Label(uint16_t heightPixel, std::shared_ptr<ICairoWrapper> cairoWrapper);

    ~Label() override;

    Label(const Label&)            = delete;
    Label& operator=(const Label&) = delete;
    Label(Label&&)                 = delete;
    Label& operator=(Label&&)      = delete;

    bool create(PrintableText printableText) override;
    bool create(const std::string& labelText) override;
    void writeToPng(const std::string& file);
    [[nodiscard]] int getWidth() const override;
    [[nodiscard]] int getHeight() const override;
    [[nodiscard]] std::vector<uint8_t> getRaw() const override;
    void setFontSize(const double fontSize) override;
    void setFontFamily(const std::string& fontFamily) override;

    void setText(const std::string& text) override;
    void setHAlign(HAlignPosition hpos) override;
    void setVAlign(VAlignPosition vpos) override;

    bool append(const ILabel& other, uint32_t spacingPx = 60) override;

   private:
    // methods
    [[nodiscard]] uint8_t getNumLines(std::string_view str);
    [[nodiscard]] PangoFontMap* createCustomFontMap();
    void configureLayout(PangoLayout* layout, const std::string& text, PangoFontDescription* fontDesc);
    void applyHorizontalAlignment(PangoLayout* layout);

    // Cairo/Pango wrapper for dependency injection
    std::shared_ptr<ICairoWrapper> mCairoWrapper;

    std::unique_ptr<cairo_surface_t, CairoSurfaceDeleter> mSurface{nullptr};
    std::unique_ptr<cairo_t, CairoDeleter> mCairoCtx{nullptr};
    std::unique_ptr<PangoContext, GObjectDeleter> mPangoCtx{nullptr};
    std::unique_ptr<PangoLayout, GObjectDeleter> mPangoLyt{nullptr};
    std::unique_ptr<PangoFontMap, GObjectDeleter> mFontMap{nullptr};
    double mFontSize{DEFAULT_FONT_SIZE};
    std::string mFontFamily{DEFAULT_FONT_FAMILY};
    HAlignPosition mHAlign = HAlignPosition::LEFT;
    VAlignPosition mVAlign = VAlignPosition::MIDDLE;
    std::string mText{""};
    int mLayoutWidth = 0, mLayoutHeight = 0;
    int mPrinterHeight = 0;
};
}  // namespace ptprnt::graphics