from pathlib import Path as PI_PATH
import subprocess as PI_SUBPROCESS
import sys as PI_SYS
import os as PI_OS

def FC_INSTALL_REQUIREMENTS(*,ZVFCI_ST_02PROG_FOLDER): 

    ZV_OB_02PROG_FOLDER = PI_PATH(ZVFCI_ST_02PROG_FOLDER)

    # 1/ Find requirements.txt
    ZV_LI_OB_PATH_REQ_FILES = list(
        ZV_OB_02PROG_FOLDER.rglob('requirements.txt')
    )
    if not ZV_LI_OB_PATH_REQ_FILES:
        raise FileNotFoundError(f'No requirements.txt file found under {ZV_OB_02PROG_FOLDER}')

    ZV_OB_PATH_REQUIREMENTS_FILE = ZV_LI_OB_PATH_REQ_FILES[0]

    # 2/ Install python requirements
    PI_SUBPROCESS.run(
        [
            PI_SYS.executable,
            '-m',
            'pip',
            'install',
            '-r',
            str(ZV_OB_PATH_REQUIREMENTS_FILE)
        ],
        check=True
    )