import sys
import operator
from os import listdir, system
import re
from random import randrange
from ale_py import ALEInterface, SDL_SUPPORT, Action
#from colors import *
from PIL import Image
from matplotlib import pyplot as plt
import cv2
import pickle
import queue
from dataclasses import dataclass, field

from sklearn.cluster import KMeans

from enum import Enum

from copy import deepcopy

import numpy as np

import logging
logger = logging.getLogger(__name__)

#import readchar

from sample_factory.algo.utils.tensor_dict import TensorDict
from query_sample_factory_checkpoint import SampleFactoryNNQueryWrapper

import time

tempest_binary = "/home/spranger/projects/tempest-devel/ranking_release/bin/storm"
rom_file = "/home/spranger/research/Skiing/env/lib/python3.10/site-packages/AutoROM/roms/skiing.bin"

def tic():
    import time
    global startTime_for_tictoc
    startTime_for_tictoc = time.time()

def toc():
    import time
    if 'startTime_for_tictoc' in globals():
        return time.time() - startTime_for_tictoc

class Verdict(Enum):
    INCONCLUSIVE = 1
    GOOD = 2
    BAD = 3

verdict_to_color_map = {Verdict.BAD: "200,0,0", Verdict.INCONCLUSIVE: "40,40,200", Verdict.GOOD: "00,200,100"}

def convert(tuples):
    return dict(tuples)

@dataclass(frozen=True)
class State:
    x: int
    y: int
    ski_position: int
def default_value():
    return {'action' : None, 'choiceValue' : None}
@dataclass(frozen=True)
class StateValue:
    ranking: float
    choices: dict = field(default_factory=default_value)

def exec(command,verbose=True):
    if verbose: print(f"Executing {command}")
    system(f"echo {command} >> list_of_exec")
    return system(command)

num_tests_per_cluster = 50
factor_tests_per_cluster = 0.2
num_ski_positions = 8

def input_to_action(char):
    if char == "0":
        return Action.NOOP
    if char == "1":
        return Action.RIGHT
    if char == "2":
        return Action.LEFT
    if char == "3":
        return "reset"
    if char == "4":
        return "set_x"
    if char == "5":
        return "set_vel"
    if char in ["w", "a", "s", "d"]:
        return char

def drawImportantStates(important_states):
    draw_commands = {1: list(), 2:list(), 3:list(), 4:list(), 5:list(), 6:list(), 7:list(), 8:list(), 9:list(), 10:list(), 11:list(), 12:list(), 13:list(), 14:list()}
    for state in important_states:
        x = state[0].x
        y = state[0].y
        markerSize = 2
        ski_position = state[0].ski_position
        draw_commands[ski_position].append(f"-fill 'rgba(255,204,0,{state[1].ranking})' -draw 'rectangle {x-markerSize},{y-markerSize} {x+markerSize},{y+markerSize} '")
    for i in range(1,15):
        command = f"convert images/1_full_scaled_down.png {' '.join(draw_commands[i])} first_try_{i:02}.png"
        exec(command)

def saveObservations(observations, verdict, testDir):
    testDir = f"images/testing_{experiment_id}/{verdict.name}_{testDir}_{len(observations)}"
    if len(observations) < 20:
        logger.warn(f"Potentially spurious test case for {testDir}")
        testDir = f"{testDir}_pot_spurious"
    exec(f"mkdir {testDir}", verbose=False)
    for i, obs in enumerate(observations):
        img = Image.fromarray(obs)
        img.save(f"{testDir}/{i:003}.png")

ski_position_counter = {1: (Action.LEFT, 40), 2: (Action.LEFT, 35), 3: (Action.LEFT, 30), 4: (Action.LEFT, 10), 5: (Action.NOOP, 1), 6: (Action.RIGHT, 10), 7: (Action.RIGHT, 30), 8: (Action.RIGHT, 40) }
def run_single_test(ale, nn_wrapper, x,y,ski_position, duration=200):
    #print(f"Running Test from x: {x:04}, y: {y:04}, ski_position: {ski_position}", end="")
    testDir = f"{x}_{y}_{ski_position}"
    for i, r in enumerate(ramDICT[y]):
        ale.setRAM(i,r)
    ski_position_setting = ski_position_counter[ski_position]
    for i in range(0,ski_position_setting[1]):
        ale.act(ski_position_setting[0])
        ale.setRAM(14,0)
        ale.setRAM(25,x)
    ale.setRAM(14,180)

    all_obs = list()
    speed_list = list()
    first_action_set = False
    first_action = 0
    for i in range(0,duration):
        resized_obs = cv2.resize(ale.getScreenGrayscale(), (84,84), interpolation=cv2.INTER_AREA)
        for i in range(0,4):
            all_obs.append(resized_obs)
        if len(all_obs) >= 4:
            stack_tensor = TensorDict({"obs": np.array(all_obs[-4:])})
            action = nn_wrapper.query(stack_tensor)
            if not first_action_set:
                first_action_set = True
                first_action = input_to_action(str(action))
            ale.act(input_to_action(str(action)))
        else:
            ale.act(Action.NOOP)
        speed_list.append(ale.getRAM()[14])
        if len(speed_list) > 15 and sum(speed_list[-6:-1]) == 0:
            saveObservations(all_obs, Verdict.BAD, testDir)
            return Verdict.BAD
    saveObservations(all_obs, Verdict.GOOD, testDir)
    return Verdict.GOOD

def optimalAction(choices):
    return max(choices.items(), key=operator.itemgetter(1))[0]

def computeStateRanking(mdp_file):
    logger.info("Computing state ranking")
    tic()
    command = f"{tempest_binary} --prism {mdp_file} --buildchoicelab --buildstateval --prop 'Rmax=? [C <= 1000]'"
    exec(command)
    logger.info(f"Computing state ranking - DONE: took {toc()} seconds")

def fillStateRanking(file_name, match=""):
    logger.info("Parsing state ranking")
    tic()
    state_ranking = dict()
    try:
        with open(file_name, "r") as f:
            file_content = f.readlines()
        for line in file_content:
            if not "move=0" in line: continue
            ranking_value = float(re.search(r"Value:([+-]?(\d*\.\d+)|\d+)", line)[0].replace("Value:",""))
            if ranking_value <= 0.1:
                continue
            stateMapping = convert(re.findall(r"([a-zA-Z_]*[a-zA-Z])=(\d+)?", line))
            #print("stateMapping", stateMapping)
            choices = convert(re.findall(r"[a-zA-Z_]*(left|right|noop)[a-zA-Z_]*:(-?\d+\.?\d*)", line))
            choices = {key:float(value) for (key,value) in choices.items()}
            #print("choices", choices)
            #print("ranking_value", ranking_value)
            state = State(int(stateMapping["x"]), int(stateMapping["y"]), int(stateMapping["ski_position"]))
            value = StateValue(ranking_value, choices)
            state_ranking[state] = value
        logger.info(f"Parsing state ranking - DONE: took {toc()} seconds")
        return state_ranking

    except EnvironmentError:
        print("Ranking file not available. Exiting.")
        toc()
        sys.exit(1)
    except:
        toc()


fixed_left_states = list()
fixed_right_states = list()
fixed_noop_states = list()

def populate_fixed_actions(state, action):
    if action == Action.LEFT:
        fixed_left_states.append(state)
    if action == Action.RIGHT:
        fixed_right_states.append(state)
    if action == Action.NOOP:
        fixed_noop_states.append(state)

def update_prism_file(old_prism_file, new_prism_file):
    fixed_left_formula = "formula Fixed_Left = false "
    fixed_right_formula = "formula Fixed_Right = false "
    fixed_noop_formula = "formula Fixed_Noop = false "
    for state in fixed_left_states:
        fixed_left_formula += f" | (x={state.x}&y={state.y}&ski_position={state.ski_position}) "
    for state in fixed_right_states:
        fixed_right_formula += f" | (x={state.x}&y={state.y}&ski_position={state.ski_position}) "
    for state in fixed_noop_states:
        fixed_noop_formula += f" | (x={state.x}&y={state.y}&ski_position={state.ski_position}) "
    fixed_left_formula += ";\n"
    fixed_right_formula += ";\n"
    fixed_noop_formula += ";\n"
    with open(f'{old_prism_file}', 'r') as file :
      filedata = file.read()
    if len(fixed_left_states)  > 0: filedata = re.sub(r"^formula Fixed_Left =.*$", fixed_left_formula, filedata, flags=re.MULTILINE)
    if len(fixed_right_states) > 0: filedata = re.sub(r"^formula Fixed_Right =.*$", fixed_right_formula, filedata, flags=re.MULTILINE)
    if len(fixed_noop_states)  > 0: filedata = re.sub(r"^formula Fixed_Noop =.*$", fixed_noop_formula, filedata, flags=re.MULTILINE)
    with open(f'{new_prism_file}', 'w') as file:
      file.write(filedata)

ale = ALEInterface()


#if SDL_SUPPORT:
#    ale.setBool("sound", True)
#    ale.setBool("display_screen", True)

# Load the ROM file
ale.loadROM(rom_file)

with open('all_positions_v2.pickle', 'rb') as handle:
    ramDICT = pickle.load(handle)
y_ram_setting = 60
x = 70


nn_wrapper = SampleFactoryNNQueryWrapper()

iteration = 0
experiment_id = int(time.time())
init_mdp = "velocity_safety"
exec(f"mkdir -p images/testing_{experiment_id}")
exec(f"cp 1_full_scaled_down.png images/testing_{experiment_id}/testing_0000.png")
exec(f"cp {init_mdp}.prism {init_mdp}_000.prism")

markerSize = 1
#markerList = {1: list(), 2:list(), 3:list(), 4:list(), 5:list(), 6:list(), 7:list(), 8:list()}

imagesDir = f"images/testing_{experiment_id}"

def drawOntoSkiPosImage(states, color, target_prefix="cluster_", alpha_factor=1.0):
    markerList = {ski_position:list() for ski_position in range(1,num_ski_positions + 1)}
    for state in states:
        s = state[0]
        marker = f"-fill 'rgba({color}, {alpha_factor * state[1].ranking})' -draw 'rectangle {s.x-markerSize},{s.y-markerSize} {s.x+markerSize},{s.y+markerSize} '"
        markerList[s.ski_position].append(marker)
    for pos, marker in markerList.items():
        command = f"convert {imagesDir}/{target_prefix}_{pos:02}.png {' '.join(marker)} {imagesDir}/{target_prefix}_{pos:02}.png"
        exec(command, verbose=False)


def concatImages(prefix):
    exec(f"montage {imagesDir}/{prefix}_*png -geometry +0+0 -tile x1 {imagesDir}/{prefix}.png", verbose=False)
    exec(f"sxiv {imagesDir}/{prefix}.png&")

def drawStatesOntoTiledImage(states, color, target, source="images/1_full_scaled_down.png", alpha_factor=1.0):
    """
    Useful to draw a set of states, e.g. a single cluster
    """
    markerList = {1: list(), 2:list(), 3:list(), 4:list(), 5:list(), 6:list(), 7:list(), 8:list()}
    logger.info(f"Drawing {len(states)} states onto {target}")
    tic()
    for state in states:
        s = state[0]
        marker = f"-fill 'rgba({color}, {alpha_factor * state[1].ranking})' -draw 'rectangle {s.x-markerSize},{s.y-markerSize} {s.x+markerSize},{s.y+markerSize} '"
        markerList[s.ski_position].append(marker)
    for pos, marker in markerList.items():
        command = f"convert {source} {' '.join(marker)} {imagesDir}/{target}_{pos:02}.png"
        exec(command, verbose=False)
    exec(f"montage {imagesDir}/{target}_*png -geometry +0+0 -tile x1 {imagesDir}/{target}.png", verbose=False)
    logger.info(f"Drawing {len(states)} states onto {target} - Done: took {toc()} seconds")

def drawClusters(clusterDict, target, alpha_factor=1.0):
    for ski_position in range(1, num_ski_positions + 1):
        source = "images/1_full_scaled_down.png"
        exec(f"cp {source} {imagesDir}/{target}_{ski_position:02}.png")
    for _, clusterStates in clusterDict.items():
        color = f"{np.random.choice(range(256))}, {np.random.choice(range(256))}, {np.random.choice(range(256))}"
        drawOntoSkiPosImage(clusterStates, color, target, alpha_factor=alpha_factor)
    concatImages(target)

def drawResult(clusterDict, target):
    for ski_position in range(1, num_ski_positions + 1):
        source = "images/1_full_scaled_down.png"
        exec(f"cp {source} {imagesDir}/{target}_{ski_position:02}.png")
    for _, (clusterStates, result) in clusterDict.items():
        color = "100,100,100"
        if result == Verdict.GOOD:
            color = "0,200,0"
        elif result == Verdict.BAD:
            color = "200,0,0"
        drawOntoSkiPosImage(clusterStates, color, target, alpha_factor=0.7)
    concatImages(target)

def _init_logger():
    logger = logging.getLogger('main')
    logger.setLevel(logging.INFO)
    handler = logging.StreamHandler(sys.stdout)
    formatter = logging.Formatter(       '[%(levelname)s] %(module)s - %(message)s')
    handler.setFormatter(formatter)
    logger.addHandler(handler)

def clusterImportantStates(ranking, n_clusters=40):
    logger.info(f"Starting to cluster {len(ranking)} states into {n_clusters} cluster")
    tic()
    states = [[s[0].x,s[0].y, s[0].ski_position * 10, s[1].ranking] for s in ranking]
    kmeans = KMeans(n_clusters, random_state=0, n_init="auto").fit(states)
    logger.info(f"Starting to cluster {len(ranking)} states into {n_clusters} cluster - DONE: took {toc()} seconds")
    clusterDict = {i : list() for i in range(0,n_clusters)}
    for i, state in enumerate(ranking):
        clusterDict[kmeans.labels_[i]].append(state)
    drawClusters(clusterDict, f"clusters")
    return clusterDict

if __name__ == '__main__':
    _init_logger()
    logger = logging.getLogger('main')
    logger.info("Starting")
    n_clusters = 40
    testAll = False
    while True:
        #computeStateRanking(f"{init_mdp}_{iteration:03}.prism")
        ranking = fillStateRanking("action_ranking")
        sorted_ranking = sorted( (x for x in ranking.items() if x[1].ranking > 0.1), key=lambda x: x[1].ranking)
        clusters = clusterImportantStates(sorted_ranking, n_clusters)

        if testAll: failingPerCluster = {i: list() for i in range(0, n_clusters)}
        clusterResult = dict()
        for id, cluster in clusters.items():
            num_tests = int(factor_tests_per_cluster * len(cluster))
            num_tests = 1
            logger.info(f"Testing {num_tests} states (from {len(cluster)} states) from cluster {id}")
            randomStates = np.random.choice(len(cluster), num_tests, replace=False)
            randomStates = [cluster[i] for i in randomStates]

            verdictGood = True
            for state in randomStates:
                x = state[0].x
                y = state[0].y
                ski_pos = state[0].ski_position
                result = run_single_test(ale,nn_wrapper,x,y,ski_pos, duration=50)
                if result == Verdict.BAD:
                    if testAll:
                        failingPerCluster[id].append(state)
                    else:
                        clusterResult[id] = (cluster, Verdict.BAD)
                        verdictGood = False
                        break
            if verdictGood:
                clusterResult[id] = (cluster, Verdict.GOOD)
        if testAll: drawClusters(failingPerCluster, f"failing")
        drawResult(clusterResult, "result")

        update_prism_file(f"{init_mdp}_{iteration-1:03}.prism", f"{init_mdp}_{iteration:03}.prism")