#!/usr/bin/env python3

import argparse
import sys

# Import local files
from formatitko.transform import transform
from formatitko.util import import_md
from formatitko.context import Context, Group
from formatitko.katex import KatexClient
from formatitko.images import ImageProcessor
from ksp_html_generator import KSPHTMLGenerator

from formatitko.mj_show import show

def main():
	# Initialize command line arguments
	parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
	parser.add_argument("-l", "--img-lookup-dirs", help="Image lookup directories. When processing images, the program will try to find the image in them first. Always looks for images in the same folder as the markdown file.", nargs="+", default=[])
	parser.add_argument("-p", "--img-public-dir", help="Directory to put processed images into. The program will overwrite images, whose dependencies are newer.", default="public")
	parser.add_argument("-c", "--img-cache-dir", help="Directory to cache processed images and intermediate products. The program will overwrite files, whose dependencies are newer.", default="cache")
	parser.add_argument("-i", "--img-web-path", help="Path where the processed images are available on the website.", default="/")
	parser.add_argument("-w", "--output-html", help="The HTML file (for Web) to write into.", default="output.html")
	parser.add_argument("-t", "--output-tex", help="The TEX file to write into.", default="output.tex")
	parser.add_argument("input_filename", help="The markdown file to process.")
	parser.add_argument("--debug", action='store_true')
	args = parser.parse_args()
	# TODO: Accept path to unix socket for katexClient, then don't init our own,
	# just connect to an existing one. For formátíking many files in a row.

	# Use panflute to parse the input MD file
	doc = import_md(open(args.input_filename, "r").read())

	if args.debug:
		print(show(doc))

	# The language metadatum is important, so it's read before transformation and
	# then attached to a group inside the Doc
	language = doc.get_metadata("language", None, True)
	context = Context(doc, args.input_filename)

	# Transform the document. This includes all the fancy formatting this software does.
	doc = doc.walk(transform, context)

	# Now wrap the document contents in a group, which is able to pop its language
	# setting out to TeX
	doc.content = [Group(*doc.content, metadata={"language":language})]

	# Initialize the image processor (this just keeps some basic state)
	imageProcessor = ImageProcessor(args.img_public_dir, args.img_web_path, args.img_cache_dir, *args.img_lookup_dirs)

	# Initialize KaTeX client (this runs the node app and connects to a unix socket)
	with KatexClient() as katexClient:
		# Generate HTML and TeX out of the transformed document
		#open(args.output_html, "w").write(html(doc, katexClient, imageProcessor))
		#open(args.output_tex, "w").write(tex(doc, imageProcessor))
		KSPHTMLGenerator(sys.stdout, katexClient, imageProcessor).generate(doc)

	if args.debug:
		print(show(doc))


if __name__ == "__main__":
    main()