/**
 * @file main.cpp
 * @brief MSDF 字体构建工具命令行入口
 *
 * 用法:
 *   msdf_font_builder -i <input.ttf> -o <output.png> [options]
 *
 * 选项:
 *   -i, --input <file>      输入 TTF 字体文件路径
 *   -o, --output <file>     输出 PNG 图集路径
 *   -c, --charset <string>  字符集字符串
 *   -f, --charset-file <file> 字符集文件路径
 *   -s, --size <pixels>     字体大小（默认 48）
 *   -r, --range <pixels>    像素范围（默认 4.0）
 *   -w, --width <pixels>    图集宽度（默认 2048）
 *   -h, --height <pixels>   图集高度（默认 2048）
 *   --help                  显示帮助信息
 */

#include "msdf_font_builder.h"
#include <iostream>
#include <string>
#include <cstdlib>

using namespace extra2d::tools;

void printUsage(const char* programName) {
    std::cout << "MSDF Font Builder - TTF 转 MSDF PNG 图集工具\n\n";
    std::cout << "用法:\n";
    std::cout << "  " << programName << " -i <input.ttf> -o <output.png> [options]\n\n";
    std::cout << "选项:\n";
    std::cout << "  -i, --input <file>       输入 TTF 字体文件路径\n";
    std::cout << "  -o, --output <file>      输出 PNG 图集路径\n";
    std::cout << "  -c, --charset <string>   字符集字符串\n";
    std::cout << "  -f, --charset-file <file> 字符集文件路径\n";
    std::cout << "  -s, --size <pixels>      字体大小（默认 48）\n";
    std::cout << "  -r, --range <pixels>     像素范围（默认 4.0）\n";
    std::cout << "  -w, --width <pixels>     图集宽度（默认 2048）\n";
    std::cout << "  -h, --height <pixels>    图集高度（默认 2048）\n";
    std::cout << "  --help                   显示帮助信息\n\n";
    std::cout << "示例:\n";
    std::cout << "  " << programName << " -i font.ttf -o font.msdf.png\n";
    std::cout << "  " << programName << " -i font.ttf -o font.msdf.png -s 64 -c \"ABCabc123\"\n";
    std::cout << "  " << programName << " -i font.ttf -o font.msdf.png -f charset.txt\n";
}

int main(int argc, char* argv[]) {
    MSDFFontBuilder builder;
    bool showHelp = false;
    int width = 2048;
    int height = 2048;

    for (int i = 1; i < argc; ++i) {
        std::string arg = argv[i];

        if (arg == "--help") {
            showHelp = true;
        } else if ((arg == "-i" || arg == "--input") && i + 1 < argc) {
            builder.setInputFont(argv[++i]);
        } else if ((arg == "-o" || arg == "--output") && i + 1 < argc) {
            builder.setOutputPath(argv[++i]);
        } else if ((arg == "-c" || arg == "--charset") && i + 1 < argc) {
            builder.setCharset(argv[++i]);
        } else if ((arg == "-f" || arg == "--charset-file") && i + 1 < argc) {
            builder.setCharsetFile(argv[++i]);
        } else if ((arg == "-s" || arg == "--size") && i + 1 < argc) {
            builder.setFontSize(std::atoi(argv[++i]));
        } else if ((arg == "-r" || arg == "--range") && i + 1 < argc) {
            builder.setPxRange(static_cast<float>(std::atof(argv[++i])));
        } else if ((arg == "-w" || arg == "--width") && i + 1 < argc) {
            width = std::atoi(argv[++i]);
        } else if ((arg == "-h" || arg == "--height") && i + 1 < argc) {
            height = std::atoi(argv[++i]);
        } else {
            std::cerr << "未知参数: " << arg << "\n";
            showHelp = true;
        }
    }

    builder.setAtlasSize(width, height);

    if (showHelp) {
        printUsage(argv[0]);
        return 0;
    }

    std::cout << "MSDF Font Builder\n";
    std::cout << "==================\n\n";
    std::cout << "开始构建...\n\n";

    if (!builder.build()) {
        std::cerr << "错误: " << builder.getError() << "\n";
        return 1;
    }

    std::cout << "成功生成 MSDF 字体图集!\n";
    std::cout << "字形数量: " << builder.getMetadata().glyphs.size() << "\n";

    return 0;
}