"""Convert raw KLE to JSON
"""
import json
import os
from pathlib import Path
from decimal import Decimal
from collections import OrderedDict

from milc import cli
from kle2xy import KLE2xy

from qmk.converter import kle2qmk


class CustomJSONEncoder(json.JSONEncoder):
    def default(self, obj):
        try:
            if isinstance(obj, Decimal):
                if obj % 2 in (Decimal(0), Decimal(1)):
                    return int(obj)
                return float(obj)
        except TypeError:
            pass
        return json.JSONEncoder.default(self, obj)


@cli.argument('filename', help='The KLE raw txt to convert')
@cli.argument('-f', '--force', action='store_true', help='Flag to overwrite current info.json')
@cli.subcommand('Convert a KLE layout to a Configurator JSON')
def kle2json(cli):
    """Convert a KLE layout to QMK's layout format.
    """  # If filename is a path
    if cli.args.filename.startswith("/") or cli.args.filename.startswith("./"):
        file_path = Path(cli.args.filename)
    # Otherwise assume it is a file name
    else:
        file_path = Path(os.environ['ORIG_CWD'], cli.args.filename)
    # Check for valid file_path for more graceful failure
    if not file_path.exists():
        return cli.log.error('File {fg_cyan}%s{style_reset_all} was not found.', str(file_path))
    out_path = file_path.parent
    raw_code = file_path.open().read()
    # Check if info.json exists, allow overwrite with force
    if Path(out_path, "info.json").exists() and not cli.args.force:
        cli.log.error('File {fg_cyan}%s/info.json{style_reset_all} already exists, use -f or --force to overwrite.', str(out_path))
        return False
    try:
        # Convert KLE raw to x/y coordinates (using kle2xy package from skullydazed)
        kle = KLE2xy(raw_code)
    except Exception as e:
        cli.log.error('Could not parse KLE raw data: %s', raw_code)
        cli.log.exception(e)
        # FIXME: This should be better
        return cli.log.error('Could not parse KLE raw data.')
    keyboard = OrderedDict(
        keyboard_name=kle.name,
        url='',
        maintainer='qmk',
        width=kle.columns,
        height=kle.rows,
        layouts={'LAYOUT': {
            'layout': 'LAYOUT_JSON_HERE'
        }},
    )
    # Initialize keyboard with json encoded from ordered dict
    keyboard = json.dumps(keyboard, indent=4, separators=(', ', ': '), sort_keys=False, cls=CustomJSONEncoder)
    # Initialize layout with kle2qmk from converter module
    layout = json.dumps(kle2qmk(kle), separators=(', ', ':'), cls=CustomJSONEncoder)
    # Replace layout in keyboard json
    keyboard = keyboard.replace('"LAYOUT_JSON_HERE"', layout)
    # Write our info.json
    file = open(str(out_path) + "/info.json", "w")
    file.write(keyboard)
    file.close()
    cli.log.info('Wrote out {fg_cyan}%s/info.json', str(out_path))