"""
SiliconCloud Embedding Interface Module
==========================

This module provides interfaces for interacting with SiliconCloud system,
including embedding capabilities.

Author: Lightrag team
Created: 2024-01-24
License: MIT License

Copyright (c) 2024 Lightrag

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

Version: 1.0.0

Change Log:
- 1.0.0 (2024-01-24): Initial release
    * Added embedding generation

Dependencies:
    - tenacity
    - numpy
    - pipmaster
    - Python >= 3.10

Usage:
    from llm_interfaces.siliconcloud import siliconcloud_model_complete, siliconcloud_embed
"""

__version__ = "1.0.0"
__author__ = "lightrag Team"
__status__ = "Production"

import sys

if sys.version_info < (3, 9):
    pass
else:
    pass
import pipmaster as pm  # Pipmaster for dynamic library install

# install specific modules
if not pm.is_installed("lmdeploy"):
    pm.install("lmdeploy")

from openai import (
    APIConnectionError,
    RateLimitError,
    APITimeoutError,
)
from tenacity import (
    retry,
    stop_after_attempt,
    wait_exponential,
    retry_if_exception_type,
)


import numpy as np
import aiohttp
import base64
import struct


@retry(
    stop=stop_after_attempt(3),
    wait=wait_exponential(multiplier=1, min=4, max=60),
    retry=retry_if_exception_type(
        (RateLimitError, APIConnectionError, APITimeoutError)
    ),
)
async def siliconcloud_embedding(
    texts: list[str],
    model: str = "netease-youdao/bce-embedding-base_v1",
    base_url: str = "https://api.siliconflow.cn/v1/embeddings",
    max_token_size: int = 512,
    api_key: str = None,
) -> np.ndarray:
    if api_key and not api_key.startswith("Bearer "):
        api_key = "Bearer " + api_key

    headers = {"Authorization": api_key, "Content-Type": "application/json"}

    truncate_texts = [text[0:max_token_size] for text in texts]

    payload = {"model": model, "input": truncate_texts, "encoding_format": "base64"}

    base64_strings = []
    async with aiohttp.ClientSession() as session:
        async with session.post(base_url, headers=headers, json=payload) as response:
            content = await response.json()
            if "code" in content:
                raise ValueError(content)
            base64_strings = [item["embedding"] for item in content["data"]]

    embeddings = []
    for string in base64_strings:
        decode_bytes = base64.b64decode(string)
        n = len(decode_bytes) // 4
        float_array = struct.unpack("<" + "f" * n, decode_bytes)
        embeddings.append(float_array)
    return np.array(embeddings)