import re
import time
import importlib
import random
from itertools import count
from math import hypot, floor

from minecraft.networking.types import BlockFace

from mosfet.protocol.managers import ChunkNotLoadedException

from mosfet import utils
from mosfet import path
from mosfet import blocks
from mosfet import items
from mosfet import mcdata
from mosfet import mobs

class FillBlocksStates:
    def idle(self):
        return None

    def init(self):
        f = self.g.filling

        if not f:
            self.state = self.cleanup
            print('Aborting, nothing to fill')
            return

        if self.last_block:
            self.state = self.select_item
        else:
            self.state = self.find_last_block

    def find_last_block(self):
        w = self.g.world
        f = self.g.filling
        print('Finding last block')

        b1, b2 = utils.pboundingbox(f.coord1, f.coord2)
        box = utils.psub(b2, b1)
        xz_distance = hypot(box[0]+1, box[2]+1)
        y_start = f.coord1[1]
        y_end = f.coord2[1]

        for y in range(y_start, y_end+1):
            for offset in utils.search_2d(xz_distance):
                check = utils.padd(f.coord1, offset)
                check = (check[0], y, check[2])

                # ensure block is within fill area
                if check[0] < b1[0] or check[0] > b2[0]:
                    continue
                if check[2] < b1[2] or check[2] > b2[2]:
                    continue

                if w.block_at(*check) == blocks.AIR:
                    self.state = self.select_item
                    return

                self.last_block = check
        else:  # for
            self.state = self.cleanup
            print('Aborting, no air left')
            return

    def select_item(self):
        f = self.g.filling
        name = blocks.BLOCKS[f.block]
        item = items.ITEMS['minecraft:'+name]['protocol_id']

        if self.g.game.select_item([item]):
            #self.g.look_at = utils.padd(self.area, path.BLOCK_BELOW)
            self.state = self.find_next_block
        else:
            print('No blocks, aborting')
            self.state = self.cleanup

    def find_next_block(self):
        w = self.g.world
        f = self.g.filling
        print('Finding next block, last:', self.last_block)

        b1, b2 = utils.pboundingbox(f.coord1, f.coord2)
        box = utils.psub(b2, b1)
        xz_distance = hypot(box[0]+1, box[2]+1)
        y_start = f.coord1[1]
        y_end = f.coord2[1]

        for y in range(y_start, y_end+1):
            if y not in self.iterators:
                self.iterators[y] = utils.search_2d(xz_distance)

            for offset in self.iterators[y]:
                check = utils.padd(f.coord1, offset)
                check = (check[0], y, check[2])

                # ensure block is within fill area
                if check[0] < b1[0] or check[0] > b2[0]:
                    continue
                if check[2] < b1[2] or check[2] > b2[2]:
                    continue

                if w.block_at(*check) == blocks.AIR:
                    print('Found next block:', check)
                    self.next_block = check
                    self.state = self.check_block_distance
                    return

        # if there's nothing left to fill
        self.g.filling = None
        self.state = self.cleanup

    def check_block_distance(self):
        w = self.g.world
        p = utils.pint(self.g.pos)
        head = utils.padd(p, path.BLOCK_ABOVE)

        if utils.phyp(head, self.next_block) < 4:
            self.state = self.fill_block
        else:
            self.state = self.nav_to_block

    def nav_to_block(self):
        w = self.g.world
        p = utils.pint(self.g.pos)
        c = self.g.chunks

        tmp = c.get_block_at(*self.next_block)
        c.set_block_at(*self.next_block, blocks.STONE)
        pos = utils.padd(self.next_block, path.BLOCK_ABOVE)
        navpath = w.path_to_place(p, pos)
        c.set_block_at(*self.next_block, tmp)

        if navpath:
            self.g.path = navpath[:-1]
            self.state = self.going_to_block
        else:
            print('Cant get to that block')
            self.state = self.cleanup
            #self.bad_sand.append(self.sand)
            #self.state = self.find_new_sand

    def going_to_block(self):
        if not len(self.g.path):
            self.state = self.fill_block

    def fill_block(self):
        print('Filling block', self.next_block)

        self.g.game.place_block(self.next_block, BlockFace.TOP)
        self.g.look_at = self.next_block

        self.wait_time = 0.25
        self.state = self.wait_for_block

    def wait_for_block(self):
        w = self.g.world
        if w.block_at(*self.next_block) != blocks.AIR:
            self.last_block = self.next_block
            self.state = self.check_obstruction
        elif self.wait_time > 0:
            self.wait_time -= utils.TICK
        else:
            print('Block didnt appear')
            self.state = self.check_obstruction

    def check_obstruction(self):
        p = utils.pint(self.g.pos)
        f = self.g.filling
        print('last', self.last_block)
        print('p', p)
        if self.last_block[1] >= p[1] and f.block not in blocks.NON_SOLID_IDS:
            print('Obstructed, going to last block')
            self.state = self.nav_to_last_block
        else:
            self.state = self.cleanup

    def nav_to_last_block(self):
        w = self.g.world
        p = utils.pint(self.g.pos)
        c = self.g.chunks

        pos = utils.padd(self.last_block, path.BLOCK_ABOVE)
        navpath = w.path_to_place(p, pos)

        if navpath:
            self.g.path = navpath
            self.state = self.going_to_last_block
        else:
            print('Cant get to that block')
            self.state = self.cleanup

    def going_to_last_block(self):
        if not len(self.g.path):
            self.state = self.cleanup

    def cleanup(self):
        self.state = self.done

    def done(self):
        # never gets ran, placeholder
        return None

    def __init__(self, global_state):
        self.g = global_state
        self.state = self.idle

        self.iterators = {}
        self.wait_time = 0
        self.last_block = None
        self.next_block = None

    def run(self):
        self.state()