#include <filesystem>
#include <fstream>

#include <drogon/drogon.h>

#include "dto/dto.h"

bool dev_mode = false;

void cleanup() {
    std::cout << "Stopping..." << std::endl;
    drogon::app().quit();
    std::cout << "Cleanup up uploads...";
    std::filesystem::remove_all("uploads");
    std::cout << " [Done]" << std::endl;
    std::cout << "Removing temp folder..." << std::flush;
    std::filesystem::remove_all("temp");
    std::cout << " [Done]" << std::endl;
    std::cout << "Goodbye!" << std::endl;
}

std::string get_index_content() {
    std::ifstream file("./static/index.html");
    return {std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>()};
}

void default_handler(const drogon::HttpRequestPtr& req, std::function<void(const drogon::HttpResponsePtr&)>&& cbk) {
    static std::string index_html = get_index_content();
    if (req->path().starts_with("/api")) {
        std::cout << "Unknown api request: " << req->getMethodString() << " " << req->path() << std::endl;
        cbk(drogon::HttpResponse::newNotFoundResponse());
    } else {
        if (dev_mode) cbk(drogon::HttpResponse::newFileResponse("./static/index.html"));
        else cbk(drogon::HttpResponse::newFileResponse((unsigned char*)index_html.data(), index_html.size()));
    }
}

int main(int argc, char* argv[]) {
    std::vector<std::string> args(argv+1, argv+argc);
    if (std::find(args.begin(), args.end(), "--dev") != args.end()) dev_mode = true;
    if (dev_mode) std::cout << "Starting in development mode" << std::endl;
    std::cout << "Setting up..." << std::endl;
    if (!std::filesystem::exists("files")) {
        std::cout << "Creating files..." << std::flush;
        std::filesystem::create_directory("files");
        std::cout << " [Done]" << std::endl;
    }
    if (!std::filesystem::exists("logs")) {
        std::cout << "Creating logs..." << std::flush;
        std::filesystem::create_directory("logs");
        std::cout << " [Done]" << std::endl;
    }
    if (std::filesystem::exists("temp")) {
        std::cout << "Removing existing temp folder..." << std::flush;
        std::filesystem::remove_all("temp");
        std::cout << " [Done]" << std::endl;
    }
    std::cout << "Creating temp folder..." << std::flush;
    std::filesystem::create_directory("temp");
    std::cout << " [Done]" << std::endl;


    auto* loop = drogon::app().getLoop();
    loop->queueInLoop([]{
        std::cout << "Starting..." << std::endl;
        std::cout << "Creating db tables..." << std::flush;
        auto db = drogon::app().getDbClient();
        db->execSqlSync("CREATE TABLE IF NOT EXISTS 'tokens' (\n"
                        "  'id' INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,\n"
                        "  'owner_id' INTEGER NOT NULL,\n"
                        "  'exp' INTEGER NOT NULL\n"
                        ")");
        db->execSqlSync("CREATE TABLE IF NOT EXISTS 'user' (\n"
                        "  'id' INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,\n"
                        "  'gitlab' INTEGER NOT NULL,\n"
                        "  'name' TEXT NOT NULL,\n"
                        "  'password' TEXT NOT NULL,\n"
                        "  'role' INTEGER NOT NULL,\n"
                        "  'root_id' INTEGER NOT NULL,\n"
                        "  'tfa_type' INTEGER NOT NULL,\n"
                        "  'tfa_secret' BLOB,\n"
                        "  'gitlab_at' TEXT,\n"
                        "  'gitlab_rt' TEXT\n"
                        ")");
        db->execSqlSync("CREATE TABLE IF NOT EXISTS 'inode' (\n"
                        "  'id' INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,\n"
                        "  'is_file' INTEGER NOT NULL,\n"
                        "  'name' TEXT,\n"
                        "  'parent_id' INTEGER,\n"
                        "  'owner_id' INTEGER NOT NULL,\n"
                        "  'size' INTEGER,\n"
                        "  'has_preview' INTEGER NOT NULL\n"
                        ")");
        std::cout << " [Done]" << std::endl;
        std::cout << "Started!" << std::endl;
        std::cout << "Registered paths: " << std::endl;
        auto handlers = drogon::app().getHandlersInfo();
        for (const auto& handler : handlers) {
            std::cout << "  ";
            if (std::get<1>(handler) == drogon::HttpMethod::Post) std::cout << "POST ";
            else std::cout << "GET  ";
            std::string func = std::get<2>(handler).substr(16);
            func.resize(30, ' ');
            std::cout << '[' << func << "] ";
            std::cout << std::get<0>(handler) << std::endl;
        }
        std::cout << "Listening on:" << std::endl;
        auto listeners = drogon::app().getListeners();
        for (const auto& listener : listeners) {
            std::cout << "  " << listener.toIpPort() << std::endl;
        }
    });

    Json::Value access_logger;
    access_logger["name"] = "drogon::plugin::AccessLogger";

    Json::Value smtp_mail;
    smtp_mail["name"] = "SMTPMail";

    Json::Value config;
    config["plugins"].append(access_logger);
    config["plugins"].append(smtp_mail);

    drogon::app()
            .setClientMaxBodySize(std::numeric_limits<size_t>::max())

            .loadConfigJson(config)

            .createDbClient("sqlite3", "", 0, "", "", "", 1, "sqlite.db")

            .setDefaultHandler(default_handler)

            .setDocumentRoot("./static")
            .setBrStatic(true)
            .setStaticFilesCacheTime(dev_mode ? -1 : 0)

            .setLogPath("./logs")
            .setLogLevel(trantor::Logger::LogLevel::kDebug)

            .setIntSignalHandler(cleanup)
            .setTermSignalHandler(cleanup)

            .enableRelaunchOnError()

            .addListener("0.0.0.0", 2345)
            .setThreadNum(8);
    std::cout << "Setup done!" << std::endl;

    drogon::app().run();
}