#include "Bus.h"
#include "cpu.h"

#include "spdlog/spdlog.h"
#include "spdlog/sinks/rotating_file_sink.h"

#include "CLI11/include/CLI/CLI.hpp"

Bus* g_bus;

IMemoryAccessor* g_cpuMemory;
CPU* g_cpu;

Cartridge* g_cartridge;

std::shared_ptr<spdlog::logger> gLogger;
spdlog::logger* Logger() { return gLogger.get(); }

void initLogger()
{
    constexpr static std::size_t MAX_LOG_SIZE = 1048576 * 5;
    constexpr static std::size_t MAX_LOG_FILES = 10;

    gLogger = spdlog::rotating_logger_mt("bear", "logs/bear.log", MAX_LOG_SIZE, MAX_LOG_FILES);
}

int main(int argc, char** argv)
{
    initLogger();
    Logger()->info("Bear started...");

    CLI::App args { "A NES Emulator" };
    argv = args.ensure_utf8(argv);

    std::string filename;
    args.add_option("-f, --file", filename, ".nes ROM file to load");

    CLI11_PARSE(args, argc, argv);

    if (filename.empty())
    {
        Logger()->error("ROM file not specified");
        exit(-1);
    }

    std::ifstream romFile(filename.c_str(), std::ios::binary);
    if (!romFile.is_open())
    {
        Logger()->error("Could not open ROM file");
        exit(-1);
    }

    romFile.seekg(0, std::ios::end);
    const std::streamsize romFileSize = romFile.tellg();
    romFile.seekg(0, std::ios::beg);

    auto* rom = new std::byte[romFileSize];

    if (!romFile.read(reinterpret_cast<char*>(rom), romFileSize))
    {
        Logger()->error("Could not read ROM file");
        exit(-1);
    }

    g_cartridge = new Cartridge(rom);
    g_bus->cartridge = g_cartridge;

    g_cpuMemory = new CPUMemoryAccessor(g_bus);
    g_cpu = new CPU(g_cpuMemory);
    g_bus->cpu = g_cpu;

    g_cpu->start();

    return 0;
}