#!/usr/bin/env python3
# Copyright (c) 2016 Comcast Cable Communications Management, LLC.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Filter for .siphon files that are generated by other filters.
# The idea is to siphon off certain initializers so that we can better
# auto-document the contents of that initializer.

import argparse
import logging
import os
import sys

import siphon

DEFAULT_LOGFILE = None
DEFAULT_LOGLEVEL = "info"
DEFAULT_SIPHON = "clicmd"
DEFAULT_FORMAT = "markdown"
DEFAULT_OUTPUT = None
DEFAULT_TEMPLATES = os.path.dirname(__file__) + "/siphon_templates"

ap = argparse.ArgumentParser()
ap.add_argument("--log-file", default=DEFAULT_LOGFILE,
                help="Log file [%s]" % DEFAULT_LOGFILE)
ap.add_argument("--log-level", default=DEFAULT_LOGLEVEL,
                choices=["debug", "info", "warning", "error", "critical"],
                help="Logging level [%s]" % DEFAULT_LOGLEVEL)

ap.add_argument("--type", '-t', metavar="siphon_type", default=DEFAULT_SIPHON,
                choices=siphon.process.siphons.keys(),
                help="Siphon type to process [%s]" % DEFAULT_SIPHON)
ap.add_argument("--format", '-f', default=DEFAULT_FORMAT,
                choices=siphon.process.formats.keys(),
                help="Output format to generate [%s]" % DEFAULT_FORMAT)
ap.add_argument("--output", '-o', metavar="file", default=DEFAULT_OUTPUT,
                help="Output file (uses stdout if not defined) [%s]" %
                     DEFAULT_OUTPUT)
ap.add_argument("--templates", metavar="directory", default=DEFAULT_TEMPLATES,
                help="Path to render templates directory [%s]" %
                     DEFAULT_TEMPLATES)
ap.add_argument("input", nargs='+', metavar="input_file",
                help="Input .siphon files")
args = ap.parse_args()

logging.basicConfig(filename=args.log_file,
                    level=getattr(logging, args.log_level.upper(), None))
log = logging.getLogger("siphon_process")

# Determine where to send the generated output
if args.output is None:
    out = sys.stdout
else:
    out = open(args.output, "w+")

# Get our processor
klass = siphon.process.siphons[args.type]
processor = klass(template_directory=args.templates, format=args.format)

# Load the input files
processor.load_json(args.input)

# Process the data
processor.process(out=out)

# All done