import os
import sys
import threading
import time
import uvicorn
import subprocess

from fastapi import FastAPI, UploadFile, File, Form
from fastapi import Request
from fastapi.middleware.cors import CORSMiddleware
from starlette.middleware.sessions import SessionMiddleware
from starlette.responses import JSONResponse, RedirectResponse, FileResponse


def save_upload_file(file: UploadFile, dir_path=None, file_name=None):
    if not dir_path:
        dir_path = "./"
    if not dir_path.endswith("/"):
        dir_path += "/"
    if not file_name:
        file_name = file.filename
    with open(dir_path + file_name, 'wb') as f:
        f.write(file.file.read())


app = FastAPI(title="project name ", description="通用系统 ", version="v 0.0.0")

# 添加 session 中间键，使项目中可以使用session
app.add_middleware(SessionMiddleware, secret_key='123456hhh')
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*", ],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)


@app.exception_handler(Exception)
async def validation_exception_handler(request, exc):
    """请求校验异常捕获; application/json """
    return JSONResponse({'message': "服务器内部错误", 'status_code': 500})


@app.middleware("http")
async def add_process_time_header(request: Request, call_next):
    """接口响应中间键; 当前只支持 http 请求"""
    start_time = time.time()
    response = await call_next(request)
    process_time = time.time() - start_time
    response.headers["API-Process-Time"] = f"{process_time} seconds"
    return response


@app.get("/call_sh")
def call_sh(path: str):
    """
    echo "$(curl 127.0.0.1:9999/call_sh?path=/Users/mlamp/IdeaProjects/python-base/tmp.sh)"
    :param path:
    :return:
    """
    # return os.popen(f"sh {path}").read()
    os.system(f"sh {path} &")
    return "请等待结果"


def run_shell(shell):
    cmd = subprocess.Popen(shell, stdin=subprocess.PIPE, stderr=sys.stderr, close_fds=True,
                           stdout=sys.stdout, universal_newlines=True, shell=True, bufsize=1)
    cmd.communicate()
    return cmd.returncode


@app.post("/upload")
def upload(file: UploadFile = File(...), path: str = Form(...)):
    """
    curl 127.0.0.1:9999/upload -F "file=@稻香.flac" -F 'path=/Users/mlamp/tmp'
    :param file:
    :param path:
    :return:
    """
    save_upload_file(file, path)
    return "OK"


@app.get("/download")
def download(path: str):
    """
    wget 127.0.0.1:9999/download?path=/Users/mlamp/tmp/稻香.flac
    :param path:
    :return:
    """
    return FileResponse(
        path,
        filename=path.split("/")[-1]
    )


if __name__ == '__main__':
    # uvicorn call_sh:app --reload --port 19999
    uvicorn.run(app='call_sh:app', host="0.0.0.0", port=9999, reload=True, debug=True)