#pragma once

#include "fonts/face/font_face.hpp"
#include "fonts/shaping/hb_shaper.hpp"
#include "fonts/cache/glyph_cache.hpp"
#include "fonts/pdf_fonts/font.hpp"
#include "fonts/pdf_fonts/types/truetype_font.hpp"
#include "fonts/pdf_fonts/types/type1_font.hpp"
#include "fonts/pdf_fonts/types/cid_font.hpp"
#include "fonts/pdf_fonts/font_loader.hpp"
#include "fonts/pdf_fonts/encoding/encoding.hpp"
#include "fonts/pdf_fonts/encoding/cjk_collection_db.hpp"
#include "fonts/pdf_fonts/font_fallback.hpp"
#include "fonts/pdf_fonts/font_subset.hpp"

#include <gtest/gtest.h>
#include <algorithm>
#include <cctype>
#include <filesystem>
#include <fstream>
#include <iostream>
#include <string>
#include <vector>

namespace {

bool containsCI(const std::string& haystack, const std::string& needle) {
    auto it = std::search(
        haystack.begin(), haystack.end(), needle.begin(), needle.end(),
        [](char a, char b) {
            return std::tolower(static_cast<unsigned char>(a)) ==
                   std::tolower(static_cast<unsigned char>(b));
        });
    return it != haystack.end();
}

bool saveGlyphAsPGM(const pdfengine::fonts::GlyphBitmap& bitmap, const std::string& filename) {
    if (bitmap.width == 0 || bitmap.height == 0 || bitmap.pixels.empty()) {
        return false;
    }
    std::ofstream out(filename, std::ios::binary);
    if (!out) {
        return false;
    }
    out << "P5\n" << bitmap.width << " " << bitmap.height << "\n255\n";
    out.write(reinterpret_cast<const char*>(bitmap.pixels.data()), bitmap.pixels.size());
    return true;
}

std::string getSystemFontPath() {
#if defined(_WIN32)
    std::vector<std::string> paths = {
        "C:\\Windows\\Fonts\\arial.ttf",
        "C:\\Windows\\Fonts\\consola.ttf",
        "C:\\Windows\\Fonts\\tahoma.ttf"
    };
#elif defined(__APPLE__)
    std::vector<std::string> paths = {
        "/Library/Fonts/Arial.ttf",
        "/System/Library/Fonts/Geneva.ttf",
        "/System/Library/Fonts/Helvetica.ttc",
        "/System/Library/Fonts/Supplemental/Arial.ttf"
    };
#else
    std::vector<std::string> paths = {
        "/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf",
        "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf",
        "/usr/share/fonts/truetype/freefont/FreeSans.ttf"
    };
#endif

    for (const auto& path : paths) {
        if (std::filesystem::exists(path)) {
            return path;
        }
    }
    return "";
}

}