import base64
import json
import ntpath
import os
import time

import gradio as gr
import requests
from google.cloud import storage

from base_task_executor import BaseTaskExecutor

# ---
enc = "utf-8"


def decode(string):
    return json.loads(base64.b64decode(string.encode(enc)).decode(enc))


def get_storage_client_from_env():
    credentials_json = decode(os.environ["GCP_API_KEY"])
    return storage.Client.from_service_account_info(credentials_json)


def get_name_ext(filepath):
    filepath = os.path.abspath(filepath)
    _, name_ext = os.path.split(filepath)
    name, ext = os.path.splitext(name_ext)
    return name, ext


def make_remote_media_path(request_id, media_path):
    assert len(request_id) > 6
    assert os.path.exists(media_path)
    src_id = request_id[:3]
    slot_id = request_id[3:6]
    request_suffix = request_id[6:]
    name, ext = get_name_ext(media_path)
    return os.path.join(src_id, slot_id, request_suffix, name + ext)


def copy_file_to_gcloud(bucket, local_file_path, remote_file_path):
    blob = bucket.blob(remote_file_path)
    blob.upload_from_filename(local_file_path)

def copy_to_gcloud(storage_client, local_media_path, bucket_name, remote_media_path):
    bucket = storage_client.get_bucket(bucket_name)
    copy_file_to_gcloud(bucket, local_media_path, remote_media_path)


# ---


class CloudTaskExecutor(BaseTaskExecutor):
    def __init__(self):
        super().__init__()
        self.base_url = os.getenv("SUTRA_AVATAR_BASE_URL")
        self.headers = {"Authorization": f'{os.getenv("SUTRA_AVATAR_API_KEY")}', "Content-Type": "application/json"}
        self.bucket_name = os.getenv("SUTRA_AVATAR_BUCKET_NAME")
        self.storage_client = get_storage_client_from_env()

    def submit_task(self, submit_request):
        url = f"{self.base_url}/task/submit"
        response = requests.post(url, json=submit_request, headers=self.headers)
        if response.status_code == 200:
            return response.json()
        else:
            response.raise_for_status()

    def get_task_status(self, request_id):
        url = f"{self.base_url}/task/status"
        response = requests.get(url, params={"rid": request_id}, headers=self.headers)
        if response.status_code == 200:
            return response.json()
        else:
            response.raise_for_status()

    def generate(
        self,
        input_base_path,
        input_driving_path,
        base_motion_expression,
        input_driving_audio_path,
        output_video_path,
        request_id,
    ):

        # Upload files
        media_paths = [input_base_path, input_driving_audio_path]
        for media_path in media_paths:
            if media_path:
                remote_media_path = make_remote_media_path(request_id, media_path)
                copy_to_gcloud(self.storage_client, media_path, self.bucket_name, remote_media_path)

        submit_request = {
            "requestId": request_id,
            "input_base_path": ntpath.basename(input_base_path),
            "input_driving_path": "",
            "base_motion_expression": base_motion_expression,
            "input_driving_audio_path": ntpath.basename(input_driving_audio_path),
            "output_video_path": ntpath.basename(output_video_path),
        }
        submit_reply = self.submit_task(submit_request)
        estimatedWaitSeconds = "unknown"
        if "estimatedWaitSeconds" in submit_reply.keys():
            estimatedWaitSeconds = submit_reply["estimatedWaitSeconds"]

        completion_statuses = {"Succeeded", "Cancelled", "Failed", "NotFound"}
        timeout = 240  # maximum time to wait in seconds
        if isinstance(estimatedWaitSeconds, int):
            timeout += estimatedWaitSeconds
        start_time = time.time()

        result = {"messages": ''}
        while True:
            status_reply = self.get_task_status(request_id)
            task_status = status_reply["taskStatus"]

            if status_reply["taskStatus"] in completion_statuses:
                break

            if time.time() - start_time > timeout:
                msg = "The task did not complete within the timeout period.\n The server is very busy serving other requests.\n Please try again."
                result["success"] = False
                result["messages"] = msg
                gr.Error(msg)
                break
            time.sleep(3)

        task_status = status_reply["taskStatus"]
        if task_status == "Succeeded":
            pipe_reply = status_reply["pipeReply"]
            result["success"] = pipe_reply["status"] == "success"
            result["messages"] = pipe_reply["messages"]
            output_video_path = status_reply["videoURL"]
        else:
            messages = ""
            if "pipeReply" in status_reply.keys():
                messages = status_reply["pipeReply"]["messages"]
            result["success"] = False
            result["messages"] += messages
        return result, output_video_path