import logging
import sys
import argparse
import pathlib
import subprocess
import configparser
import shutil
import tempfile


parser = argparse.ArgumentParser(description="Run swash model")
parser.add_argument("-v", "--verbose", action="count", default=0)
args = parser.parse_args()

logging.basicConfig(level=max((10, 20 - 10 * args.verbose)))
log = logging.getLogger("swash")

log.info("Starting swash model")
config = configparser.ConfigParser()
config.read("config.ini")

inp = pathlib.Path(config.get("swash", "input"))
out = pathlib.Path(config.get("swash", "out"))
if out.exists():
    log.error(f"Swash output '{out}' already exists")
    sys.exit(1)

with tempfile.TemporaryDirectory(prefix="swash_", dir=".") as tmp_raw:
    tmpdir = pathlib.Path(tmp_raw)

    log.info(f"Copying files to '{tmpdir}'")
    shutil.copy2(inp, tmpdir)
    shutil.copytree(
        pathlib.Path(config.get("data", "out")), tmpdir, dirs_exist_ok=True
    )
    with open(tmpdir.joinpath("sws.log"), "w") as logfile:
        log.info(f"Runing swash in '{tmpdir}'")
        subprocess.run(
            (config.get("swash", "swashrun"), "-input", inp.name),
            cwd=tmpdir,
            stdout=logfile,
            stderr=logfile,
        )

    log.info(f"Moving swash output to '{out}'")
    shutil.move(tmpdir, out)

log.info(f"Swash model finished successfully")