#include <iostream>

// copybara:import_next_line:gemma_cpp
#include "compression/compress.h"
// copybara:end
// copybara:import_next_line:gemma_cpp
#include "gemma.h"  // Gemma
// copybara:end
// copybara:import_next_line:gemma_cpp
#include "util/app.h"
// copybara:end
// copybara:import_next_line:gemma_cpp
#include "util/args.h"  // HasHelp
// copybara:end
// copybara:import_next_line:gemma_cpp
#include "configs.h"
// copybara:end
#include "hwy/base.h"
#include "hwy/contrib/thread_pool/thread_pool.h"
#include "hwy/highway.h"
#include "hwy/per_target.h"
#include "hwy/profiler.h"
#include "hwy/timer.h"

std::vector<int> tokenize(std::string prompt_string, const sentencepiece::SentencePieceProcessor& tokenizer) {
  prompt_string = "<start_of_turn>user\n" + prompt_string +
                  "<end_of_turn>\n<start_of_turn>model\n";
  std::vector<int> tokens;
  HWY_ASSERT(tokenizer.Encode(prompt_string, &tokens).ok());
  tokens.insert(tokens.begin(), 2); // BOS token
  return tokens;
}

int main(int argc, char** argv) {
  gcpp::InferenceArgs inference(argc, argv);
  gcpp::LoaderArgs loader(argc, argv);
  gcpp::AppArgs app(argc, argv);
  hwy::ThreadPool pool(app.num_threads);
  hwy::ThreadPool inner_pool(0);
  gcpp::Gemma model(loader, pool);
  std::mt19937 gen;
  std::random_device rd;
  gen.seed(rd());

  std::vector<int> tokens = tokenize("Hello, how are you?", model.Tokenizer());
  size_t ntokens = tokens.size();
  size_t pos = 0;
  auto stream_token = [&pos, &gen, &ntokens, tokenizer = &model.Tokenizer()](int token, float) {
    ++pos;
    if (pos < ntokens) {
      // print feedback
    } else if (token != gcpp::EOS_ID) {
      std::string token_text;
      HWY_ASSERT(tokenizer->Decode(std::vector<int>{token}, &token_text).ok());
      if (pos == ntokens + 1) {
        // first token of response
        token_text.erase(0, token_text.find_first_not_of(" \t\n\n"));
      }
      std::cout << token_text << std::flush;
    }
    return true;
  };

  inference.temperature = 1.0f;
  inference.deterministic = true;
  inference.multiturn = false;

  GenerateGemma(
      model, inference, tokens, 0, pool, inner_pool, stream_token,
      [](int) {return true;}, gen, 0);

  std::cout << std::endl;
}