#include <filesystem>
#include <string>
#include <array>
#include <memory>
#include "crow_all.h"

std::string exec(const std::string &cmd) {
    std::array<char, 128> buffer;
    std::string result;
    std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd.c_str(), "r"), pclose);
    if (!pipe) {
        throw std::runtime_error("popen() failed!");
    }
    while (fgets(buffer.data(), static_cast<int>(buffer.size()), pipe.get()) != nullptr) {
        result += buffer.data();
    }
    return result;
}

int main() {
	crow::SimpleApp app;

    CROW_ROUTE(app, "/")([](){
        return crow::mustache::load_text("index.html");
    });

	CROW_ROUTE(app, "/blog")([](){
		std::string posts = "";
		std::filesystem::path postsDir("posts");
		for (auto const& entry : std::filesystem::directory_iterator{postsDir}) {
			posts.append("<a href=\"/blog/");
            posts.append(entry.path().filename());
            posts.append("\"><li>");
			posts.append(entry.path().filename());
			posts.append("</li></a>");
		}

		auto page = crow::mustache::load("posts.html");
		crow::mustache::context ctx( {{"posts", posts}} );
		return page.render(ctx);
	});

	CROW_ROUTE(app, "/blog/<string>")([](const std::string &name){
        return exec("pandoc --standalone --template templates/template.html ./posts/" + name);
	});

	app.port(8080).multithreaded().run();
}