#include "Compiler.h"
#include "goalc/logger/Logger.h"
#include "common/link_types.h"

using namespace goos;

Compiler::Compiler() {
  init_logger();
  m_ts.add_builtin_types();
  m_global_env = std::make_unique<GlobalEnv>();
  m_none = std::make_unique<None>(m_ts.make_typespec("none"));

  // todo - compile library
}

void Compiler::execute_repl() {
  while (!m_want_exit) {
    try {
      // 1). get a line from the user (READ)
      std::string prompt;
      if (m_listener.is_connected()) {
        prompt = "gc";
      } else {
        prompt = "g";
      }
      Object code = m_goos.reader.read_from_stdin(prompt);

      // 2). compile
      auto obj_file = compile_object_file("repl", code, m_listener.is_connected());
      obj_file->debug_print_tl();

      //        // 3). color
      //        color_object_file(obj_file);
      //
      //        // 4). codegen
      //        auto data = codegen_object_file(obj_file);
      //
      //        // 4). send!
      //        if(m_listener.is_connected()) {
      //          m_listener.send_code(data);
      //          if(!m_listener.most_recent_send_was_acked()) {
      //            gLogger.log(MSG_ERR, "Runtime is not responding. Did it crash?\n");
      //          }
      //        }

    } catch (std::exception& e) {
      gLogger.log(MSG_WARN, "REPL Error: %s\n", e.what());
    }
  }

  m_listener.disconnect();
}

Compiler::~Compiler() {
  gLogger.close();
}

void Compiler::init_logger() {
  gLogger.set_file("compiler.txt");  // todo, a better file than this...
  gLogger.config[MSG_COLOR].kind = LOG_FILE;
  gLogger.config[MSG_DEBUG].kind = LOG_IGNORE;
  gLogger.config[MSG_TGT].color = COLOR_GREEN;
  gLogger.config[MSG_TGT_INFO].color = COLOR_BLUE;
  gLogger.config[MSG_WARN].color = COLOR_RED;
  gLogger.config[MSG_ICE].color = COLOR_RED;
  gLogger.config[MSG_ERR].color = COLOR_RED;
}

FileEnv* Compiler::compile_object_file(const std::string& name,
                                       goos::Object code,
                                       bool allow_emit) {
  auto file_env = m_global_env->add_file(name);
  Env* compilation_env = file_env;
  if (!allow_emit) {
    compilation_env = file_env->add_no_emit_env();
  }

  file_env->add_top_level_function(
      compile_top_level_function("top-level", std::move(code), compilation_env));

  return file_env;
}

std::unique_ptr<FunctionEnv> Compiler::compile_top_level_function(const std::string& name,
                                                                  const goos::Object& code,
                                                                  Env* env) {
  auto fe = std::make_unique<FunctionEnv>(env, name);
  fe->set_segment(TOP_LEVEL_SEGMENT);

  auto result = compile_error_guard(code, fe.get());

  // only move to return register if we actually got a result
  if (!dynamic_cast<const None*>(result)) {
    fe->emit(std::make_unique<IR_Return>(fe->make_gpr(result->type()), result->to_gpr(fe.get())));
  }

  fe->finish();
  return fe;
}

Val* Compiler::compile_error_guard(const goos::Object& code, Env* env) {
  try {
    return compile(code, env);
  } catch (std::runtime_error& e) {
    printf(
        "------------------------------------------------------------------------------------------"
        "-\n");
    auto obj_print = code.print();
    if (obj_print.length() > 80) {
      obj_print = obj_print.substr(0, 80);
      obj_print += "...";
    }
    printf("object: %s\nfrom  : %s\n", obj_print.c_str(),
           m_goos.reader.db.get_info_for(code).c_str());
    throw e;
  }
}

void Compiler::throw_compile_error(const goos::Object& o, const std::string& err) {
  gLogger.log(MSG_ERR, "[Error] Could not compile %s!\nReason: %s\n", o.print().c_str(),
              err.c_str());
  throw std::runtime_error(err);
}

void Compiler::ice(const std::string& error) {
  gLogger.log(MSG_ICE, "[ICE] %s\n", error.c_str());
  throw std::runtime_error("ICE");
}