#!/usr/bin/env python3

from . import parse_numberdealers


def link(link_text: str, message_obj: parse_numberdealers.Message):
	return f"[{link_text}]({parse_numberdealers.URL_PREFIX}{message_obj.id})"

def mention(message: parse_numberdealers.Message):
	if message.username is not None:
		return f" (@{message.username})"
	else:
		return ""

def str_from_error(err):
	if isinstance(err, parse_numberdealers.UnrecognizedNumber):
		msg = f"- Unrecognized post {link(err.message.message, err.message)}"
	elif isinstance(err, parse_numberdealers.EditedMessage):
		msg = f"- Edited post {link(err.message.message, err.message)}"
	elif isinstance(err, parse_numberdealers.NonNumberMessage):
		msg = f"- Non-number message {link(err.message.message, err.message)}"
	elif isinstance(err, parse_numberdealers.ShouldHaveBeen):
		msg = f"- {link(err.message.recognized_number, err.message)} should have been {err.expected_number}"
	elif isinstance(err, parse_numberdealers.Duplicate):
		msg = f"- Duplicate {link(err.message.recognized_number, err.message)}"
	elif isinstance(err, parse_numberdealers.Stray):
		msg = f"- Stray {link(err.message.recognized_number, err.message)}"
	elif isinstance(err, parse_numberdealers.Skipped):
		msg = f"- {link('Skipped', err.message)} {err.expected_number}"
	elif isinstance(err, parse_numberdealers.Jump):
		msg = f"- Going from {link(err.previous_message.recognized_number, err.previous_message)}" \
				f" to {link(err.message.recognized_number, err.message)}"

	return msg + mention(err.message)


def report_errors(errors):
	if errors:
		print("🚨 Errors: 🚨")
		print("\n".join(map(str_from_error, errors)))
	else:
		print("No errors! 🎉")


def main():
	import sys
	numbers, errors = parse_numberdealers.parse(sys.stdin)

	if numbers == [] and errors == []:
		print("No input data")
	else:
		if numbers == []:
			print("No valid number messages!")
		else:
			print(f"Checked from {numbers[0].recognized_number} up to {numbers[-1].recognized_number}")
			report_errors(errors)


if __name__ == "__main__":
	main()