from enum import Enum
from queue import Queue
import threading
from typing import List, Union


class IntCodeState(Enum):
    INITIALIZED = 0
    RUNNING = 1
    HALTED = 2


class IntCode(threading.Thread):
    def __init__(self, memory: List[int]):
        super().__init__()
        self.instr_ptr = 0
        self.memory = memory
        self.input_queue = Queue()
        self.output_queue = Queue()
        self.state = IntCodeState.INITIALIZED
        self.relative_base = 0

    def getMemoryValue(self, address: int) -> int:
        if address > len(self.memory) - 1:
            self.memory.extend([0] * (address - len(self.memory) + 1))

        return self.memory[address]

    def setMemoryValue(self, address: int, value: int):
        if address > len(self.memory) - 1:
            self.memory.extend([0] * (address - len(self.memory) + 1))

        self.memory[address] = value

    def getParameterValue(self, address: int, mode: int = 0) -> int:
        if mode == 0:
            return self.getMemoryValue(self.getMemoryValue(address))
        elif mode == 1:
            return self.getMemoryValue(address)
        elif mode == 2:
            return self.getMemoryValue(self.relative_base + self.getMemoryValue(address))

    def getTargetAddress(self, address: int, mode: int = 0) -> int:
        if mode == 0:
            return self.getMemoryValue(address)
        elif mode == 2:
            return self.getMemoryValue(address) + self.relative_base

    def isRunning(self):
        return self.state == IntCodeState.RUNNING

    def isHalted(self):
        return self.state == IntCodeState.HALTED

    def sendOutputTo(self, target_queue: Queue):
        self.output_queue = target_queue

    def addInput(self, value: int):
        self.input_queue.put(value)

    def hasOutput(self):
        return self.output_queue.qsize() > 0

    def getOutput(self, count: int = 1, block: bool = True, timeout: int = None) -> Union[int, List[int]]:
        if count == 1:
            res = self.output_queue.get(block=block, timeout=timeout)
            self.output_queue.task_done()
        else:
            res = []
            for _ in range(count):
                res.append(self.output_queue.get(block=block, timeout=timeout))
                self.output_queue.task_done()

        return res

    def run(self):
        self.state = IntCodeState.RUNNING
        while not self.isHalted():
            instr = self.getMemoryValue(self.instr_ptr)
            op_code = instr % 100
            p1_mode = instr // 100 % 10
            p2_mode = instr // 1_000 % 10
            p3_mode = instr // 10_000 % 10

            if op_code == 1:  # add
                param1 = self.getParameterValue(self.instr_ptr + 1, p1_mode)
                param2 = self.getParameterValue(self.instr_ptr + 2, p2_mode)
                target_addr = self.getTargetAddress(self.instr_ptr + 3, p3_mode)
                self.setMemoryValue(target_addr, param1 + param2)
                self.instr_ptr += 4
            elif op_code == 2:  # multiply
                param1 = self.getParameterValue(self.instr_ptr + 1, p1_mode)
                param2 = self.getParameterValue(self.instr_ptr + 2, p2_mode)
                target_addr = self.getTargetAddress(self.instr_ptr + 3, p3_mode)
                self.setMemoryValue(target_addr, param1 * param2)
                self.instr_ptr += 4
            elif op_code == 3:  # input
                target_addr = self.getTargetAddress(self.instr_ptr + 1, p1_mode)
                self.setMemoryValue(target_addr, self.input_queue.get(timeout=30))
                self.input_queue.task_done()
                self.instr_ptr += 2
            elif op_code == 4:  # output
                self.output_queue.put(self.getParameterValue(self.instr_ptr + 1, p1_mode))
                self.instr_ptr += 2
            elif op_code == 5:  # jump-if-true
                if self.getParameterValue(self.instr_ptr + 1, p1_mode) != 0:
                    self.instr_ptr = self.getParameterValue(self.instr_ptr + 2, p2_mode)
                else:
                    self.instr_ptr += 3
            elif op_code == 6:  # jump-if-false
                if self.getParameterValue(self.instr_ptr + 1, p1_mode) == 0:
                    self.instr_ptr = self.getParameterValue(self.instr_ptr + 2, p2_mode)
                else:
                    self.instr_ptr += 3
            elif op_code == 7:  # less than
                param1 = self.getParameterValue(self.instr_ptr + 1, p1_mode)
                param2 = self.getParameterValue(self.instr_ptr + 2, p2_mode)
                target_addr = self.getTargetAddress(self.instr_ptr + 3, p3_mode)
                self.setMemoryValue(target_addr, param1 < param2)
                self.instr_ptr += 4
            elif op_code == 8:  # equals
                param1 = self.getParameterValue(self.instr_ptr + 1, p1_mode)
                param2 = self.getParameterValue(self.instr_ptr + 2, p2_mode)
                target_addr = self.getTargetAddress(self.instr_ptr + 3, p3_mode)
                self.setMemoryValue(target_addr, param1 == param2)
                self.instr_ptr += 4
            elif op_code == 9:
                param1 = self.getParameterValue(self.instr_ptr + 1, p1_mode)
                self.relative_base += param1
                self.instr_ptr += 2
            elif op_code == 99:
                self.state = IntCodeState.HALTED
                return
            else:
                raise ValueError("Invalid instruction encountered at pos %d: %d" % (self.instr_ptr, instr))