/*
DingusPPC - The Experimental PowerPC Macintosh emulator
Copyright (C) 2018-20 divingkatae and maximum
                      (theweirdo)     spatium

(Contact divingkatae#1017 or powermax#2286 on Discord for more info)

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

// The main runfile - main.cpp
// This is where the magic begins

#include "debugger/debugger.h"
#include "machines/machinefactory.h"
#include "machines/machineproperties.h"
#include "ppcemu.h"
#include <cinttypes>
#include <cstring>
#include <fstream>
#include <iostream>
#include <sstream>
#include <stdio.h>
#include <thirdparty/CLI11/CLI11.hpp>
#include <thirdparty/SDL2/include/SDL.h>
#include <thirdparty/loguru/loguru.hpp>

using namespace std;

void display_help() {
    std::cout << "                                                   " << endl;
    std::cout << "To interact with DingusPPC, please refer to the    " << endl;
    std::cout << "following command line reference guide:            " << endl;
    std::cout << "___________________________________________________" << endl;
    std::cout << "| COMMAND  | FUNCTION                             |" << endl;
    std::cout << "___________________________________________________" << endl;
    std::cout << " realtime  | Run the emulator in real-time         " << endl;
    std::cout << " debugger  | Enter the interactive debugger        " << endl;
    std::cout << " ram       | Specify the number of RAM banks,      " << endl;
    std::cout << "           | followed by how much each bank holds  " << endl;
    std::cout << " videocard | Specify the video card to emulate     " << endl;
    std::cout << " gfxmem    | Specify the how much memory           " << endl;
    std::cout << "           | to allocate to the emulated video card" << endl;
    std::cout << " romfile   | Insert the ROM file to use            " << endl;
    std::cout << "                                                   " << endl;
}

void display_recognized_machines() {
    std::cout << "                                                   " << endl;
    std::cout << "The following machines are supported by DingusPPC: " << endl;
    std::cout << "___________________________________________________" << endl;
    std::cout << "| COMMAND  | MACHINE RECOGNIZED                   |" << endl;
    std::cout << "___________________________________________________" << endl;
    std::cout << " pmg3      | Power Mac G3 Beige                    " << endl;
    std::cout << " pm6100    | Power Mac 6100                        " << endl;
    std::cout << "                                                   " << endl;
}

int main(int argc, char** argv) {
    /*
    Execution Type:
    0 = Realtime (Interpreter)
    1 = Realtime (Debugger)
    2 = Recompiler (to-do)

    The rest will be decided later
    */

    uint32_t execution_mode    = 0;
    uint32_t sys_ram_size[12]  = {64, 0, 0, 0};
    uint32_t gfx_mem           = 2;
    string machine_name        = "";

    CLI::App app("DingusPPC CLI");
    app.allow_windows_style_options(); /* we want Windows-style options */
    app.allow_extras();

    cout << endl;
    cout << "DingusPPC - Prototype 5bf5 (8/23/2020)       " << endl;
    cout << "Written by divingkatae and maximumspatium    " << endl;
    cout << "(c) 2018-2020 The DingusPPC Dev Team.        " << endl;
    cout << "This is not intended for general use.        " << endl;
    cout << "Use at your own discretion.                  " << endl;
    cout << endl;

    bool   realtime_enabled, debugger_enabled;
    string machine_str;
    string bootrom_path("bootrom.bin");

    app.add_flag("-r,--realtime", realtime_enabled,
        "Run the emulator in real-time");

    app.add_flag("-d,--debugger", debugger_enabled,
        "Enter the built-in debugger");

    app.add_option("-b,--bootrom", bootrom_path, "Specifies BootROM path")
        ->check(CLI::ExistingFile);

    CLI::Option* machine_opt = app.add_option("-m,--machine",
        machine_str, "Specify machine ID");

    auto list_cmd = app.add_subcommand("machines",
        "Display available machine configurations and exit");

    CLI11_PARSE(app, argc, argv);

    if (debugger_enabled) {
        if (realtime_enabled)
            cout << "Both realtime and debugger enabled! Using debugger" << endl;
        execution_mode = 1;
    }

    /* initialize logging */
    loguru::g_preamble_date    = false;
    loguru::g_preamble_time    = false;
    loguru::g_preamble_thread  = false;

    if (execution_mode) {
        loguru::g_stderr_verbosity = loguru::Verbosity_OFF;
        loguru::init(argc, argv);
        loguru::add_file("dingusppc.log", loguru::Append, 0);
    } else {
        loguru::g_stderr_verbosity = 0;
        loguru::init(argc, argv);
    }

    if (*machine_opt) {
        LOG_F(INFO, "Machine option was passed in: %s", machine_str.c_str());
        create_machine_for_rom(bootrom_path.c_str(), sys_ram_size, gfx_mem);
    } else {
        machine_str = machine_name_from_rom(bootrom_path);
        if (machine_str.empty()) {
            LOG_F(ERROR, "Could not autodetect machine");
            return 0;
        } 
        else {
            LOG_F(INFO, "Machine was autodetected as: %s", machine_str.c_str());
            if (machine_str.compare("pmg3") == 0) {
                LOG_F(INFO, "Time to build up a machine");
                establish_machine_presets(bootrom_path.c_str(), machine_str, sys_ram_size, gfx_mem);
            } else if (machine_str.compare("pm6100") == 0) {
                LOG_F(ERROR, "Board not yet ready for: %s", machine_str.c_str());
                return -1;
            } else {
                cout << "Unable to define machine: " << machine_str << endl;
                return -1;
            }
        }
    }

    /* handle overriding of machine settings from CLI */
    map<string, string> settings;
    get_machine_settings(machine_str, settings);

    CLI::App sa;
    sa.allow_extras();

    for (auto& s : settings) {
        sa.add_option("--" + s.first, s.second);
    }
    sa.parse(app.remaining_for_passthrough()); /* TODO: handle exceptions! */

    set_machine_settings(settings);

    cout << "BootROM path: " << bootrom_path << endl;
    cout << "Execution mode: " << execution_mode << endl;

#ifdef SDL
        if (SDL_Init(SDL_INIT_AUDIO)){
            LOG_F(ERROR, "SDL_Init error: %s", SDL_GetError());
            return 0;
        }
#endif
    
    switch (execution_mode) {
        case 0:
            for (;;) {
                ppc_exec();
            }
            break;
        case 1:
            enter_debugger();
            break;
        default:
            LOG_F(ERROR, "Invalid EXECUTION MODE");
            return 0;
    }
    
    /*
    bail:
    LOG_F(INFO, "Cleaning up...");

    delete gMachineObj.release();

    return 0;
    */
}