from django.template.response import TemplateResponse
from django.http import JsonResponse as JSONResponse
from .interpreter import Interpreter
from urllib.parse import parse_qsl, unquote_plus, unquote
from typing import Dict


def index(request):
	args = {}
	return TemplateResponse(request, 'brainfuck/index.html', args)


def process_code(request):
	qs = request.META['QUERY_STRING']
	params: Dict[str, str] = {}
	for pair in qs.split('&'):
		if not pair:
			continue
		key, sep, val = pair.partition('=')
		# decode key (still treat '+'→space in parameter names)
		decoded_key = unquote_plus(key)
		# decode value: unquote (leaves '+' intact), then percent-decode
		decoded_val = unquote(val)
		params[decoded_key] = decoded_val
	
	print('params:', params)

	code = params.get('code', '')
	input_data = params.get('user_input', '') 
	# interpreter
	interpreter = Interpreter(commands_per_second=1_000_000_000_000, debug=True, comma_standart_input=False)
	interpreter.user_input = input_data
	interpreter.load_code_from_string(code)
	# should be try/except?
	try:
		interpreter.execute_loaded_code()
		out = interpreter.saved_output	
	except Exception as e:
		print('Error:', e)
		out = 'Error: Code execution failed'
	
	end_state = interpreter.print_data(interpreter.last_step)
	
	return JSONResponse({
		'code': code,
		'input_data': input_data,
		'output': out,
		'end_state': end_state,
	})