"""
resources.py provides useful tools for resources processing.

There are 2 commands available.
- clean: clean and unify the resources file names with some rules.
- round: generate the rounded images from the original squared images.
"""

import os
import subprocess
import sys

import config as cfg
from . import resource_dir

_usage = "Usage: resources.py <cmd> <pvd>"


def cleaner_aws(f):
    f = f.replace("_", "-")
    f = f.replace("@4x", "")
    for p in cfg.FILE_PREFIXES["aws"]:
        if f.startswith(p):
            f = f[len(p):]
            break
    return f.lower()


def cleaner_azure(f):
    f = f.replace("_", "-")
    f = f.replace("(", "").replace(")", "")
    f = "-".join(f.split())
    for p in cfg.FILE_PREFIXES["azure"]:
        if f.startswith(p):
            f = f[len(p):]
            break
    return f.lower()


def cleaner_gcp(f):
    f = f.replace("_", "-")
    f = "-".join(f.split())
    for p in cfg.FILE_PREFIXES["gcp"]:
        if f.startswith(p):
            f = f[len(p):]
            break
    return f.lower()


cleaners = {
    "aws": cleaner_aws,
    "azure": cleaner_azure,
    "gcp": cleaner_gcp,
}


def clean_png(pvd: str) -> None:
    """Refine the resources files names."""

    def _rename(base: str, png: str):
        new = cleaners[pvd](png)
        old_path = os.path.join(base, png)
        new_path = os.path.join(base, new)
        os.rename(old_path, new_path)

    for root, _, files in os.walk(resource_dir(pvd)):
        pngs = filter(lambda f: f.endswith(".png"), files)
        [_rename(root, png) for png in pngs]


def round_png(pvd: str) -> None:
    """Round the images."""

    def _round(base: str, path: str):
        path = os.path.join(base, path)
        subprocess.call([cfg.CMD_ROUND, *cfg.CMD_ROUND_OPTS, path])

    for root, _, files in os.walk(resource_dir(pvd)):
        pngs = filter(lambda f: f.endswith(".png"), files)
        paths = filter(lambda f: "rounded" not in f, pngs)
        [_round(root, path) for path in paths]


def svg2png(pvd: str) -> None:
    """Convert the svg into png"""

    def _convert(base: str, path: str):
        path = os.path.join(base, path)
        subprocess.call([cfg.CMD_SVG2PNG, *cfg.CMD_SVG2PNG_OPTS, path])
        subprocess.call(['rm', path])

    for root, _, files in os.walk(resource_dir(pvd)):
        svgs = filter(lambda f: f.endswith(".svg"), files)
        [_convert(root, path) for path in svgs]


# fmt: off
commands = {
    "clean": clean_png,
    "round": round_png,
    "svg2png": svg2png,
}
# fmt: on

if __name__ == "__main__":
    if len(sys.argv) < 3:
        print(_usage)
        sys.exit()

    cmd = sys.argv[1]
    pvd = sys.argv[2]
    if cmd not in commands:
        sys.exit()
    if pvd not in cfg.PROVIDERS:
        sys.exit()
    commands[cmd](pvd)