import paramiko
import numpy as np
import io, os
from PIL import Image
import requests
import json
import random
from .constants import SSH_SERVER, SSH_PORT, SSH_USER, SSH_PASSWORD, SSH_LOG, SSH_MSCOCO

ssh_client = None
sftp_client = None

def create_ssh_client(server, port, user, password):
    global ssh_client, sftp_client
    ssh_client = paramiko.SSHClient()
    ssh_client.load_system_host_keys()
    ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    ssh_client.connect(server, port, user, password)

    transport = ssh_client.get_transport()
    transport.set_keepalive(60)

    sftp_client = ssh_client.open_sftp()
def is_connected():
    global ssh_client, sftp_client
    if ssh_client is None or sftp_client is None:
        return False
    # 检查SSH连接是否正常
    if not ssh_client.get_transport().is_active():
        return False
    # 检查SFTP连接是否正常
    try:
        sftp_client.listdir('.')  # 尝试列出根目录
    except Exception as e:
        print(f"Error checking SFTP connection: {e}")
        return False
    return True

def get_image_from_url(image_url):
    response = requests.get(image_url)
    response.raise_for_status()  # success
    return Image.open(io.BytesIO(response.content))

def get_random_mscoco_prompt():
    global sftp_client
    if not is_connected():
        create_ssh_client(SSH_SERVER, SSH_PORT, SSH_USER, SSH_PASSWORD)
    num = random.randint(0, 2999)
    file = "{}.txt".format(num)

    remote_file_path = os.path.join(SSH_MSCOCO, file)
    with sftp_client.file(remote_file_path, 'r') as f:
        content = f.read().decode('utf-8')
        print(f"Content of {file}:")
        print("\n")
    return content


def create_remote_directory(remote_directory):
    global ssh_client
    if not is_connected():
        create_ssh_client(SSH_SERVER, SSH_PORT, SSH_USER, SSH_PASSWORD)
    stdin, stdout, stderr = ssh_client.exec_command(f'mkdir -p {SSH_LOG}/{remote_directory}')
    error = stderr.read().decode('utf-8')
    if error:
        print(f"Error: {error}")
    else:
        print(f"Directory {remote_directory} created successfully.")
    return f'{SSH_LOG}/{remote_directory}'
    
def upload_ssh_all(states, output_dir, data, data_path):
    global sftp_client
    if not is_connected():
        create_ssh_client(SSH_SERVER, SSH_PORT, SSH_USER, SSH_PASSWORD)
    output_file_list = []
    image_list = []
    for i in range(len(states)):
        output_file = os.path.join(output_dir, f"{i}.jpg")
        output_file_list.append(output_file)
        image_list.append(states[i].output)

    with sftp_client as sftp:
        for i in range(len(output_file_list)):
            if isinstance(image_list[i], str):
                print("get url image")
                image_list[i] = get_image_from_url(image_list[i])
            with io.BytesIO() as image_byte_stream:
                image_list[i].save(image_byte_stream, format='JPEG')
                image_byte_stream.seek(0)  
                sftp.putfo(image_byte_stream, output_file_list[i])
            print(f"Successfully uploaded image to {output_file_list[i]}")
        json_data = json.dumps(data, indent=4)
        with io.BytesIO(json_data.encode('utf-8')) as json_byte_stream:
            sftp.putfo(json_byte_stream, data_path)
        print(f"Successfully uploaded JSON data to {data_path}")
    # create_ssh_client(SSH_SERVER, SSH_PORT, SSH_USER, SSH_PASSWORD)