import asyncio
import json
import math
import unittest
import xml.etree.ElementTree as ET

import boto3
import httpx
from botocore.client import BaseClient
from botocore.config import Config
from loguru import logger

from BowongModalFunctions.utils.PathUtils import FileUtils


class S3TestCase(unittest.IsolatedAsyncioTestCase):
    AWS_ACCESS_KEY_ID = "AKIAYRH5NGRSWHN2L4M6"
    AWS_SECRET_ACCESS_KEY = "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"
    S3_BUCKET = "modal-media-cache"
    S3_REGION = "ap-northeast-2"
    client: BaseClient
    semaphore = asyncio.Semaphore(20)

    def setUp(self):
        self.client = boto3.client("s3",
                                   aws_access_key_id=self.AWS_ACCESS_KEY_ID,
                                   aws_secret_access_key=self.AWS_SECRET_ACCESS_KEY,
                                   region_name=self.S3_REGION,
                                   endpoint_url="https://s3-accelerate.amazonaws.com",
                                   config=Config(s3={'addressing_style': 'virtual'}, signature_version='s3v4'))

    async def test_cloudfront_presign_upload(self):
        key = "upload/test.mp4"
        signed_url = self.client.generate_presigned_url("put_object",
                                                        Params={
                                                            'Bucket': self.S3_BUCKET,
                                                            'Key': key,
                                                            "ContentType": "video/mp4",
                                                        }, ExpiresIn=3600)
        logger.info(signed_url)

    async def test_cloudfront_presign_multipart_upload(self):
        local_filename = "./videos/fc-01JWDYP1PXBQ0MQGM9YBNPZQ1E.mp4"
        chunk_size = 1024 * 1024 * 5
        total_file_size = FileUtils.get_file_size(local_filename)
        chunk_count = math.ceil(total_file_size / chunk_size)
        logger.info(f"{chunk_count} * {chunk_size} of {total_file_size} bytes")
        key = "upload/test2.mp4"
        content_type = "video/mp4"
        multipart_upload_response = self.client.create_multipart_upload(Bucket=self.S3_BUCKET, Key=key,
                                                                        ContentType=content_type, )
        logger.info(multipart_upload_response)
        upload_id = multipart_upload_response.get("UploadId")
        signed_urls = []
        for i in range(chunk_count):
            signed_url = self.client.generate_presigned_url("upload_part",
                                                            Params={
                                                                'Bucket': self.S3_BUCKET,
                                                                'Key': key,
                                                                'PartNumber': i + 1,
                                                                'UploadId': upload_id,
                                                            }, ExpiresIn=3600)
            signed_urls.append(signed_url)
            # logger.info(signed_url)
        logger.info(signed_urls)
        signed_completed_url = self.client.generate_presigned_url("complete_multipart_upload",
                                                                  Params={
                                                                      'Bucket': self.S3_BUCKET,
                                                                      'Key': key,
                                                                      'UploadId': upload_id,
                                                                  }, ExpiresIn=3600)
        signed_list_url = self.client.generate_presigned_url("list_parts",
                                                             Params={
                                                                 'Bucket': self.S3_BUCKET,
                                                                 'Key': key,
                                                                 'UploadId': upload_id,
                                                             }, ExpiresIn=3600)
        json_data = {
            "parts": signed_urls,
            "list": signed_list_url,
            "completed": signed_completed_url
        }
        logger.info(json.dumps(json_data, ensure_ascii=False, indent=2))

        async def upload_task(part_number: int, url: str, local_file: str, start: int, end: int,
                              client: httpx.AsyncClient):
            async with self.semaphore:
                try:
                    logger.info(f"[{part_number}] Uploading {start} -> {end}")
                    with open(local_file, "rb") as f:
                        f.seek(start)
                        data = f.read(end - start)
                    response = await client.put(url=url, content=data)
                    response.raise_for_status()
                    Etag = response.headers.get("ETag").strip('"')
                    # logger.info(f"headers: {response.headers}")
                    logger.info(Etag)
                    return {"ETag": Etag, "PartNumber": part_number}
                except Exception as e:
                    logger.exception(e)
                    raise e

        upload_tasks = []
        async with httpx.AsyncClient(timeout=30) as client:
            async with self.semaphore:
                for i, signed_url in enumerate(signed_urls):
                    start = i * chunk_size
                    end = min(start + chunk_size, total_file_size)
                    curr_chunk_size = end - start
                    logger.info(f"No.{i + 1} chunks of {curr_chunk_size} bytes")
                    upload_tasks.append(
                        upload_task(part_number=i + 1, url=signed_url,
                                    local_file=local_filename, start=start, end=end,
                                    client=client))
                # 等待所有上传任务完成
                results = await asyncio.gather(*upload_tasks)
                logger.info(results)
            results.sort(key=lambda x: x["PartNumber"])
            logger.info(json.dumps(results, ensure_ascii=False, indent=2))
            # 生成XML格式的请求体
            root = ET.Element('CompleteMultipartUpload')
            for part in results:
                part_elem = ET.SubElement(root, 'Part')
                part_number = ET.SubElement(part_elem, 'PartNumber')
                part_number.text = str(part['PartNumber'])
                etag = ET.SubElement(part_elem, 'ETag')
                etag_str = part['ETag']
                etag.text = f'"{etag_str}"'
            # 将XML转换为字符串
            xml_data = ET.tostring(root, encoding='utf-8')
            logger.info(f"xml : {xml_data}")
            completed_response = await client.post(url=signed_completed_url, content=xml_data,
                                                   headers={"Content-Type": "application/xml"})
            logger.info(f"[HTTP {completed_response.status_code}] {completed_response.text}")


if __name__ == '__main__':
    unittest.main()