#!/bin/env python

from yaml import safe_load
from glob import glob
from os.path import dirname

BASE = dirname(__file__) + '/src'
FILES = glob(f'{BASE}/*.yaml')

# GLOBAL VARIABLES

global CORNER_LEFT, CORNER_RIGHT, WALL_LEFT, WALL_RIGHT

# CONSTANTS

MAX_WIDTH_TITLE = 40
MAX_WIDTH_PLATFORM = 4
MAX_WIDTH_NAME = 54
MAX_WIDTH = 1 + MAX_WIDTH_PLATFORM + 3 + MAX_WIDTH_NAME + 1
TITLE_PADDING = 7
DELIMITER = "|   :|"

# FUNCTIONS

# split strings longer than length into a list
# strings are split at last index of delim
def split_to_list(str, length, delim=' '):
	l = []

	while len(str) > length:
		sep = str.rfind(delim, 0, length)
		l.append(str[0:sep])
		str = str[sep+1:]

	l.append(str)

	return l

def len_wall(wl, wr):
	return len(wl + wr)

def build_header(s_title, add_index=False, index=None):
	global CORNER_LEFT, CORNER_RIGHT, WALL_LEFT, WALL_RIGHT

	# split title to list if it's too long
	if len(s_title) > MAX_WIDTH_TITLE:
		l_title = split_to_list(s_title, MAX_WIDTH_TITLE)
	else:
		l_title = [s_title]

	header = []

	# prepare left and right padding to center title
	len_title = len(l_title[0])
	pad, pad_left = divmod((MAX_WIDTH + len_wall(WALL_LEFT, WALL_RIGHT)) - (len_title + (TITLE_PADDING * 2)) - 2, 2)
	len_border = len_title + ((TITLE_PADDING * 2) - 2)

	# upper part
	header.append(' ' * (pad + pad_left + 2) + '_' * len_border + ' ' * (pad + 2))
	header.append('_' * (pad + pad_left) + '//' + ' ' * len_border + '\\\\' + '_' * pad)

	# ' ' padded Title
	for title_index, title in enumerate(l_title):
		char_pad = '_' if title_index+1 == len(l_title) else ' '
		pad_right = len_title - len(title)
		header.append(char_pad * (pad + pad_left) + '|' + ' ' * TITLE_PADDING + title + ' ' * (TITLE_PADDING + pad_right) + '|' + char_pad * pad)

	# lower part
	# optional navigation tag
	if add_index == True and index != None:
		header.append(' ' * (pad + pad_left) + '\\\\' + '_' * len_border + '//' + ' ' * (pad - 7) + f'[{index}] ')
	else:
		header.append(' ' * (pad + pad_left) + '\\\\' + '_' * len_border + '//' + ' ' * pad)

	header.append(' ' * (MAX_WIDTH + len_wall(WALL_LEFT, WALL_RIGHT)))

	return header

def index_identifier(prefix, index):
	return f'{prefix}{index:>03d}'

def build_index(titles, prefix):
	global CORNER_LEFT, CORNER_RIGHT, WALL_LEFT, WALL_RIGHT

	index = [
		' - ' + item.ljust((MAX_WIDTH + len_wall(WALL_LEFT, WALL_RIGHT)) - 10) + '[' + index_identifier(prefix, i+1) + '] '
		for i, item in enumerate(titles)
	]

	# add one line of blank space for aesthetic reasons
	index += [' ' * (MAX_WIDTH + len_wall(WALL_LEFT, WALL_RIGHT))]

	return index

def build_game(name, platform):
	return f' {platform.ljust(MAX_WIDTH_PLATFORM)} | {name.ljust(MAX_WIDTH_NAME)} '

def build_table(index, games):
	global CORNER_LEFT, CORNER_RIGHT, WALL_LEFT, WALL_RIGHT

	# top of table
	table_result = [
		CORNER_LEFT + '_' * (MAX_WIDTH_PLATFORM + 2) + ' ' + '_' * (MAX_WIDTH_NAME + 2) + CORNER_RIGHT
		, WALL_LEFT + '=' * (MAX_WIDTH_PLATFORM + 2) + '|' + '=' * (MAX_WIDTH_NAME + 2) + WALL_RIGHT
	]

	# actual game text
	for game in games:
		name = game['name']
		platform = game['platform']
		if len(platform) > MAX_WIDTH_PLATFORM:
			raise Exception(f"Platform shortcode for {name} is longer than {MAX_WIDTH_PLATFORM} characters. Invalid.")

		if len(name) > MAX_WIDTH_NAME:
			for i,i_name in enumerate(split_to_list(name, MAX_WIDTH_NAME)):
				table_result += [
					WALL_LEFT + build_game(i_name, platform if i == 0 else '') + WALL_RIGHT
				]
		else:
			table_result += [
				WALL_LEFT + build_game(name, platform) + WALL_RIGHT
			]

	# bottom of table
	table_result += [
		WALL_LEFT + '_' * (MAX_WIDTH_PLATFORM + 2) + '|' + '_' * (MAX_WIDTH_NAME + 2) + WALL_RIGHT
	]

	return table_result

def get_border_for_index(index):
	last_index = len(FILES) - 1
	if index == 0:
		return ' ', '', '|', ''
	elif index == last_index:
		return '', ' ', '', '|'
	else:
		return '', '', '', ''

########
# MAIN #
########

def main():
	print('go')

	lists = []
	result = []

	# parse every file into list
	for file_index, file_item in enumerate(FILES):
		with open(file_item, 'r') as file:
			yaml = safe_load(file)

		# prepare corners and walls
		global CORNER_LEFT, CORNER_RIGHT, WALL_LEFT, WALL_RIGHT
		CORNER_LEFT, CORNER_RIGHT, WALL_LEFT, WALL_RIGHT = get_border_for_index(file_index)

		# create list by opening with header
		list_result = build_header(yaml['title'])

		# add index right after
		list_result += build_index([ i['title'] for i in yaml['sections'] ], yaml['prefix'])

		# build sections
		for section_index, section in enumerate(yaml['sections']):
			list_result += build_header(section['title'], add_index=True, index=index_identifier(yaml['prefix'], section_index+1))
			list_result += build_table(file_index, section['games'])

		lists.insert(file_index, list_result)

	max_length = len(max(lists, key=len))

	for list_index, list_item in enumerate(lists):
		if len(list_item) < max_length:
			_, _, wl, wr = get_border_for_index(list_index)
			
			list_item += [' ' * (MAX_WIDTH + len_wall(wl, wr))] * (max_length - len(list_item))

		if list_index == 0:
			result = list_item
			continue

		# add list to result line by line
		for game_index, game_item in enumerate(list_item):
			result[game_index] += ( DELIMITER + game_item )

		with open('gamelog.txt', 'w') as file:
			for line in result:
				file.write(f"{line}\n")

	print('done')

	return

if __name__ == "__main__":
	main()