import ctypes
import platform
import os
import sys 
sys.path.append("..") 
from api import project
from api import parser


def _verify_platform():
    _platform = platform.system()
    if _platform != "Windows":
        raise Exception(f'Platform {_platform} unsupported (not yet)')


# readable True => json, False => binary output
def run_project(name: str, readable: bool = True) -> str:
    if not project.have_project(name):
        raise Exception(f'Not found project {name}')

    dir = os.path.dirname(os.getcwd())

    db_inp = os.path.join(os.path.join(dir, 'db_inp'), name + '.db.inp')
    parser.dump_inp(name, db_inp)

    input = name + '.db'
    exe = os.path.join(os.path.join(dir, 'epanet'), 'runepanet.exe')
    inp = os.path.join(os.path.join(dir, 'db_inp'), input + '.inp')
    rpt = os.path.join(os.path.join(dir, 'temp'), input + '.rpt')
    opt = os.path.join(os.path.join(dir, 'temp'), input + '.opt')
    command = f'{exe} {inp} {rpt} {opt}'

    result = os.system(command)
    if result != 0:
        raise Exception("Failed to run simulation for project {name}")

    _lib_output = ctypes.CDLL(os.path.join(os.getcwd(), 'epanet-output.dll'))

    handle = ctypes.c_void_p()

    def _check(result):
        if result != 0:
            raise Exception(f'Failed to read output {name}')

    _check(_lib_output.ENR_init(ctypes.byref(handle)))

    _check(_lib_output.ENR_open(handle, ctypes.c_char_p(opt.encode())))

    _check(_lib_output.ENR_close(ctypes.byref(handle)))

    return ''


if __name__ == '__main__':
    _verify_platform()
    run_project('net3')