from django import template
from django.utils.safestring import mark_safe
from seminar.utils import TypDeadline, deadline
register = template.Library()

@register.filter(name='deadline')
def deadline_text(datum):
	if deadline(datum) is None:
		return 'Neznámý deadline'
	typ, cislo, dl = deadline(datum)
	strings = {
		TypDeadline.PredDeadline: f"1. deadline čísla {cislo} ({dl})",
		TypDeadline.SousDeadline: f"Soustřeďkový deadline čísla {cislo} ({dl})",
		TypDeadline.FinalDeadline: f"Finální deadline čísla {cislo} ({dl})",
		}
	return strings[typ]

@register.filter(name='deadline_kratseji')
def deadline_kratsi_text(datum):
	if deadline(datum) is None:
		return 'NONE'
	typ, cislo, dl = deadline(datum)
	strings = {
		TypDeadline.PredDeadline: f"{cislo} ♲",
		TypDeadline.SousDeadline: f"{cislo} Ⓢ",
		TypDeadline.FinalDeadline: f"{cislo} ✓",
		}
	return strings[typ]

@register.filter(name='deadline_html')
def deadline_html(datum):
	if deadline(datum) is None:
		return 'Neznámý deadline'
	typ, _, _ = deadline(datum)
	text = deadline_kratsi_text(datum)
	classes = {
		TypDeadline.PredDeadline: 'preddeadline',
		TypDeadline.SousDeadline: 'sous_deadline',
		TypDeadline.FinalDeadline: 'final_deadline',
		}
	return mark_safe(f'<span class="{classes[typ]}">{text}</span>')

@register.filter(name='zkrat_nazev_problemu')
def zkrat_nazev_problemu(nazev):
	if len(nazev) > 10:
		if nazev[9] == " ":
			nazev = nazev[:9] + "..."
		else:
			nazev = nazev[:10] + "..."
	return nazev