/* 
    ptrnt - print labels on linux
    Copyright (C) 2023  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 "Image.hpp"

#include <algorithm>
#include <spdlog/spdlog.h>

#include <cstddef>
#include <iostream>  // remove me
#include <string>

#include "cairo.h"
#include "pango/pango-context.h"
#include "pango/pango-font.h"
#include "pango/pango-layout.h"
#include "pango/pango-types.h"
#include "pango/pangocairo.h"

namespace ptprnt::graphics {
Image::Image() {
    /*mSurface         = cairo_image_surface_create(CAIRO_FORMAT_A8, 512, 128);
    cairo_t* cr      = cairo_create(mSurface);
    mFontDescription = pango_font_description_new();
    pango_font_description_set_family(mFontDescription, "sans");
    pango_font_description_set_weight(mFontDescription, PANGO_WEIGHT_SEMIBOLD);
    pango_font_description_set_size(mFontDescription, 60 * PANGO_SCALE);

    std::string printThis("Mist 💩");

    mLayout = pango_cairo_create_layout(cr);
    pango_layout_set_font_description(mLayout, mFontDescription);
    pango_layout_set_text(mLayout, printThis.c_str(), -1);

    cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
    cairo_move_to(cr, 0.0, 94.0);
    pango_cairo_show_layout_line(cr, pango_layout_get_line(mLayout, 0));

    cairo_surface_write_to_png(mSurface, "hello.png");*/
}

uint8_t* Image::getRaw() {
    cairo_surface_flush(mSurface);
    return cairo_image_surface_get_data(mSurface);
}

uint8_t Image::getNumLines(std::string_view strv) {
    return std::count(strv.begin(), strv.end(), '\n');
}

void Image::createLabel(const std::string& str) {
    // create Pango layout first, to get the render dimensions
    mSurface    = cairo_image_surface_create(CAIRO_FORMAT_A8, 512, 128);
    cairo_t* cr = cairo_create(mSurface);
    //auto pangoCtx{pango_context_new()};
    auto pangoLyt{pango_cairo_create_layout(cr)};
    auto pangoFontDesc{pango_font_description_from_string("FreeSans 32")};

    pango_layout_set_single_paragraph_mode(pangoLyt, true);
    pango_layout_set_height(pangoLyt, getNumLines(str) * -1);
    pango_layout_set_alignment(pangoLyt, PANGO_ALIGN_CENTER);
    pango_layout_set_font_description(pangoLyt, pangoFontDesc);
    pango_layout_set_text(pangoLyt, str.c_str(), static_cast<int>(str.length()));

    // Debug only
    GError* gerr{nullptr};
    pango_layout_write_to_file(pangoLyt, PANGO_LAYOUT_SERIALIZE_DEFAULT, "hello.txt", &gerr);

    // create Cairo surface from p ango layout
    int* width{};
    int* height{};  // TODO: change me, fixed for current printer (128px)
    PangoRectangle* rect{};

    pango_cairo_show_layout(cr, pangoLyt);
    pango_layout_get_extents(pangoLyt, rect, rect);
    std::cerr << "Width is: " << rect->width << " height is:" << rect->height << std::endl;

    //auto cairoSfc{cairo_image_surface_create(CAIRO_FORMAT_A8, *width, *height)};

    cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);

    // Debug only
    cairo_surface_write_to_png(mSurface, "hellow.png");
}

Image::~Image() {
    spdlog::info("Image dtor...");
}
}  // namespace ptprnt::graphics