# license: bsd-3-clause
# origin: https://huggingface.co/AXERA-TECH/DeepSeek-R1-Distill-Qwen-1.5B/blob/main/deepseek-r1_tokenizer.py

from transformers import AutoTokenizer
from http.server import HTTPServer, BaseHTTPRequestHandler
import json
import argparse


class Tokenizer_Http:
    def __init__(self):
        model_id = "TinySwallow-1.5B-Instruct-ax630c"
        self.tokenizer = AutoTokenizer.from_pretrained(model_id)

    def encode(self, prompt):
        messages = [
            {"role": "system", "content": "あなたは、Sakana AI株式会社が開発したTinySwallowです。小型ながら、誠実で優秀なアシスタントです。"},
            {"role": "user", "content": prompt}
        ]
        text = self.tokenizer.apply_chat_template(
            messages,
            tokenize=False,
            add_generation_prompt=True
        )
        print(text)
        token_ids = self.tokenizer.encode(text)
        return token_ids

    def decode(self, token_ids):
        return self.tokenizer.decode(token_ids)

    @property
    def bos_id(self):
        return self.tokenizer.bos_token_id

    @property
    def eos_id(self):
        return self.tokenizer.eos_token_id

    @property
    def bos_token(self):
        return self.tokenizer.bos_token

    @property
    def eos_token(self):
        return self.tokenizer.eos_token


tokenizer = Tokenizer_Http()

print(tokenizer.bos_id, tokenizer.bos_token, tokenizer.eos_id, tokenizer.eos_token)
print(tokenizer.encode("hello world"))


class Request(BaseHTTPRequestHandler):
    timeout = 5
    server_version = 'Apache'

    def _set_headers(self):
        self.send_response(200)
        self.send_header("Content-Type", "application/json; charset=utf-8")
        self.end_headers()

    def do_GET(self):
        print(self.path)
        self._set_headers()

        if self.path == '/bos_id':
            bos_id = tokenizer.bos_id
            msg = json.dumps({'bos_id': bos_id if bos_id is not None else -1}, ensure_ascii=False)
        elif self.path == '/eos_id':
            eos_id = tokenizer.eos_id
            msg = json.dumps({'eos_id': eos_id if eos_id is not None else -1}, ensure_ascii=False)
        else:
            msg = json.dumps({'error': 'Invalid path'}, ensure_ascii=False)

        print(msg)
        self.wfile.write(msg.encode('utf-8'))

    def do_POST(self):
        content_length = int(self.headers['Content-Length'])
        data = self.rfile.read(content_length).decode('utf-8')

        self._set_headers()

        try:
            req = json.loads(data)
        except json.JSONDecodeError:
            msg = json.dumps({'error': 'Invalid JSON'}, ensure_ascii=False)
            self.wfile.write(msg.encode('utf-8'))
            return

        if self.path == '/encode':
            prompt = req.get('text', '')
            token_ids = tokenizer.encode(prompt)
            msg = json.dumps({'token_ids': token_ids if token_ids else -1}, ensure_ascii=False)

        elif self.path == '/decode':
            token_ids = req.get('token_ids', [])
            text = tokenizer.decode(token_ids)
            msg = json.dumps({'text': text if text else ""}, ensure_ascii=False)

        else:
            msg = json.dumps({'error': 'Invalid path'}, ensure_ascii=False)

        print(msg)
        self.wfile.write(msg.encode('utf-8'))


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument('--host', type=str, default='localhost')
    parser.add_argument('--port', type=int, default=8080)
    args = parser.parse_args()

    host = (args.host, args.port)
    print(f'http://{host[0]}:{host[1]}')
    server = HTTPServer(host, Request)
    server.serve_forever()