import json
import math
import os
import sys

from jinja2 import Template


# Konstanten zum Einsetzen
heading = {
	'de': 'Ophasenstundenplan',
	'en': 'Ophase Timetable'
}
dayNames = [
	{
		'de': 'Montag',
		'en': 'Monday'
	},
	{
		'de': 'Dienstag',
		'en': 'Tuesday'
	},
	{
		'de': 'Mittwoch',
		'en': 'Wednesday'
	},
	{
		'de': 'Donnerstag',
		'en': 'Thursday'
	},
	{
		'de': 'Freitag',
		'en': 'Friday'
	}
]


def main(argv):
	if len(sys.argv) < 5:
		raise Exception('Zu wenige Argumente gegeben ({} <language> <input-json> <output-pdf> <template>)'.format(sys.argv[0]))

	language = sys.argv[1]
	input_path = sys.argv[2]
	output_path = sys.argv[3]
	template_path = sys.argv[4]
	if output_path.endswith('.pdf'):
		output_path = output_path[0:output_path.rfind('.pdf')]


	with open(input_path, 'r') as f:
		data = json.load(f)

	# Kategorien der Veranstaltungen, z.B. "Zentrale Veranstaltung"
	categories = ''
	for category in data['categories']:
		name = category["name"][language]
		name = name.replace('&', '\\&').replace('_', '\\_')
		categories += '\\farbe{{{}}}{{{}}}{{{}}}\n'.format(category["id"], name, category["colour"][1:])

	# Randanmerkungen
	notes = ''
	for note in data['notes']:
		notes += '\\notiz{{{}}}'.format(note[language])

	# Einzelne Zeitfenster der Veranstaltungen
	time_min = 24
	time_max = 0
	events = ''
	for day in data['days']:
		events += '\\begin{{tag}}{{{}}}\n'.format(dayNames[day['dayOfWeek']-1][language])
		for slot in day['slots']:
			start = slot['from']
			end = slot['to']
			time_min = min(time_min, math.floor(float(start.replace(':', '.'))))
			time_max = max(time_max, math.ceil (float(  end.replace(':', '.'))))

			name = slot['name'][language]
			name = name.replace('&', '\\&').replace('_', '\\_').replace('\n', '\\\\')
			room = slot['room']
			room = room.replace('&', '\\&').replace('_', '\\_')
			# Referenz auf Randanmerkungen
			if 'notes' in slot:
				for i in slot['notes']:
					name += '\\textsuperscript{{{})}}'.format(i)
			events += '\t\\slot{{{}}}{{{}}}{{{}}}{{{}}}{{{}}}\n'.format(start, end, name, room, slot['category'])
		events += '\\end{tag}\n'

	# Spalte für Stunden
	time = ''
	time += '\\begin{tag}{Zeit}\n'
	for h in range(time_min, time_max, 1):
		time += '\t\zeit{{{:02d}:00}}{{{:02d}:00}}'.format(h, h+1)
	time += '\\end{tag}\n'

	with open(template_path, 'r') as f:
		template = f.read()

	template = template.replace('{{SCALING}}', str(data['scaling']))
	template = template.replace('{{HEADING}}', heading[language])
	template = template.replace('{{STUDIENGANG}}', data['study'])
	template = template.replace('{{KATEGORIEN}}', categories)
	template = template.replace('{{ZEITEN}}', time)
	template = template.replace('{{VERANSTALTUNGEN}}', events)
	template = template.replace('{{NOTIZEN}}', notes)

	with open('stundenplan-working-copy.tex', 'w') as f:
		f.write(template)

	os.system('xelatex --jobname={}_{} stundenplan-working-copy.tex'.format(output_path, language))


main(sys.argv)