import os
import requests
import json
import time
from qiniu import put_file  
import tempfile
import shutil
import random

API_KEY = os.environ['API_KEY']

headers = {
    "User-Agent": "PexelDance Sdk/1.0",
    'Authorization': 'Bearer %s' % API_KEY,
    'Content-Type': 'application/json'
}

def get_endpoint():
    hosts = [
        "https://api-01.pexeldance.com",
        "https://api-02.pexeldance.com",
        "https://api-03.pexeldance.com",
        "https://api-04.pexeldance.com",
        "https://api-05.pexeldance.com",
        "https://api-06.pexeldance.com",
        "https://api-07.pexeldance.com",
        "https://api-08.pexeldance.com",
        "https://api-09.pexeldance.com",
        "https://api-10.pexeldance.com",
        # "https://api-11.pexeldance.com",
        # "https://api-12.pexeldance.com",
        # "https://api-13.pexeldance.com",
        # "https://api-14.pexeldance.com",
        # "https://api-15.pexeldance.com",
        # "https://api-16.pexeldance.com",
        # "https://api-17.pexeldance.com",
        # "https://api-18.pexeldance.com",
        # "https://api-19.pexeldance.com",
        # "https://api-20.pexeldance.com",
    ]
    return random.choice(hosts)


def get_upload_token(extension="mp4"):
    endpoint = get_endpoint()
    url = endpoint +  "/api/upload/token"

    payload = json.dumps({
    "file_ext": extension,
    })

    response = requests.request("POST", url, headers=headers, data=bytes(payload, "utf-8"))
    if 200<= response.status_code < 300:
        return response.json()
    return None

def upload_file(local_file, file_key, token):
    ret, info = put_file(token, file_key, local_file)
    if info.status_code == 200:
        return ret
    else:
        return None

def confirm_upload(key, name, hash_, fsize, bucket):
    endpoint = get_endpoint()
    url = endpoint +  "/api/upload/confirm"

    payload = json.dumps({
        "key": key,
        "name": name,
        "hash": hash_,
        "fsize": fsize,
        "bucket": bucket,
    })

    response = requests.request("POST", url, headers=headers, data=payload)
    if 200<= response.status_code < 300:
        return response.json()
    return None

def upload_video(file):
    ext = file.split(".")[-1]
    if not os.path.exists(file):
        return False
    token_res = get_upload_token(ext)
    upload_data = token_res.get('data')
    if not upload_data:
        return False
    upload_token = upload_data.get('token')
    if not upload_token:
        return False

    bucket_key = upload_data.get('bucket_key')
    if not bucket_key:
        return False

    ret = upload_file(file, bucket_key, upload_token)
    if not ret:
        return False
    key, name, hash_, fsize, bucket = ret.get('key'), upload_data.get('c_string'), ret.get('hash'), ret.get('fsize'), ret.get('bucket')
    upload_res = confirm_upload(key, name, hash_, fsize, bucket)
    if not upload_res:
        return False
    return upload_res.get('data')
    
def generate(item_id, style_id, width, height, prompt):
    endpoint = get_endpoint()
    url = endpoint +  "/api/job/common"
    payload = json.dumps({
    "user_content": {
        "item_id": item_id,
        "seed": 11111,
        "width": width,
        "height": height,
        "prompt": prompt
    },
    "unit": 3,
    "use_credit_type": "credit",
    "name": style_id
    })
    response = requests.request("POST", url, headers=headers, data=payload)
    if 200<= response.status_code < 300:
        return response.json()
    else:
        return None

def get_job_status(job_id):
    endpoint = get_endpoint()
    url = endpoint +  "/api/job"
    payload = json.dumps({
    "id": job_id
    })
    response = requests.request("GET", url, headers=headers, data=payload)
    if 200<= response.status_code < 300:
        return response.json()
    return None

def get_item_url(_id):
    endpoint = get_endpoint()
    url = endpoint +  "/api/download_item"
    payload = json.dumps({
    "key_id": [
        _id
    ]
    })
    response = requests.request("POST", url, headers=headers, data=payload)
    if 200<= response.status_code < 300:
        return response.json()
    return None

def get_result(job_id):
    endpoint = get_endpoint()
    url = endpoint +  "/api/item/job_id"
    payload = json.dumps({
    "job_id": job_id
    })
    response = requests.request("GET", url, headers=headers, data=payload)
    if 200<= response.status_code < 300:
        return response.json()
    return None

def download_file(url):
    response = requests.get(url, stream=True)
    if response.status_code == 200:
        tmpfile = tempfile.NamedTemporaryFile(delete=False)
        tmpfile.close() 
 
        with open(tmpfile.name, 'wb') as f:
            shutil.copyfileobj(response.raw, f)

        return tmpfile.name 
    else:
        return None

def processing(in_video, width, height, style_id,transfer_duration, prompt):
    videoRes = upload_video(in_video)
    if not videoRes:
        return None
    videoId = videoRes.get('id')
    if not videoId:
        return None
    
    req_access = False
    try_times = 1000
    for i in range(try_times):
        generate_result = generate(videoId, style_id, width, height, prompt)  
        if not generate_result:
            time.sleep(8)
            continue
        jobInfo = generate_result.get('data')
        if not jobInfo:
            time.sleep(8)
            continue
        job_id = jobInfo.get("job_id")
        if job_id:
            req_access = True
            break
    if not req_access:
        raise "too many requests"


    while True:
        jobStatusInfo = get_job_status(job_id)
        js = jobStatusInfo.get('data')
        if js is None:
            return None
        if js.get('status') == "finished":
            break
        elif  js.get('status')  == "failed":
            return None
        time.sleep(10)

    result = get_result(job_id)
    if not result:
        return None
    res_data = result.get('data')
    if not res_data:
        return None
    li = res_data.get('list')
    if len(li) == 0:
        return None
    jobRes = li[0]
    item_id = jobRes.get('id')
    if not item_id:
        return None
    itemDes = get_item_url(item_id)
    itemData = itemDes.get('data')
    if not itemData:
        return None
    signed_urls = itemData.get('signed_urls')
    if len(signed_urls) == 0:
        return None
    item_url = signed_urls[0]   

    file_path = download_file(item_url)
    if not file_path:
        return None
    return file_path