--- Day 9: Stream Processing ---
A large stream blocks your path. According to the locals, it's not safe to cross the stream at the moment because it's full of garbage. You look down at the stream; rather than water, you discover that it's a stream of characters.

You sit for a while and record part of the stream (your puzzle input). The characters represent groups - sequences that begin with { and end with }. Within a group, there are zero or more other things, separated by commas: either another group or garbage. Since groups can contain other groups, a } only closes the most-recently-opened unclosed group - that is, they are nestable. Your puzzle input represents a single, large group which itself contains many smaller ones.

Sometimes, instead of a group, you will find garbage. Garbage begins with < and ends with >. Between those angle brackets, almost any character can appear, including { and }. Within garbage, < has no special meaning.

In a futile attempt to clean up the garbage, some program has canceled some of the characters within it using !: inside garbage, any character that comes after ! should be ignored, including <, >, and even another !.

You don't see any characters that deviate from these rules. Outside garbage, you only find well-formed groups, and garbage always terminates according to the rules above.

Here are some self-contained pieces of garbage:

<>, empty garbage.
<random characters>, garbage containing random characters.
<<<<>, because the extra < are ignored.
<{!>}>, because the first > is canceled.
<!!>, because the second ! is canceled, allowing the > to terminate the garbage.
<!!!>>, because the second ! and the first > are canceled.
<{o"i!a,<{i<a>, which ends at the first >.
Here are some examples of whole streams and the number of groups they contain:

{}, 1 group.
{{{}}}, 3 groups.
{{},{}}, also 3 groups.
{{{},{},{{}}}}, 6 groups.
{<{},{},{{}}>}, 1 group (which itself contains garbage).
{<a>,<a>,<a>,<a>}, 1 group.
{{<a>},{<a>},{<a>},{<a>}}, 5 groups.
{{<!>},{<!>},{<!>},{<a>}}, 2 groups (since all but the last > are canceled).
Your goal is to find the total score for all groups in your input. Each group is assigned a score which is one more than the score of the group that immediately contains it. (The outermost group gets a score of 1.)

{}, score of 1.
{{{}}}, score of 1 + 2 + 3 = 6.
{{},{}}, score of 1 + 2 + 2 = 5.
{{{},{},{{}}}}, score of 1 + 2 + 3 + 3 + 3 + 4 = 16.
{<a>,<a>,<a>,<a>}, score of 1.
{{<ab>},{<ab>},{<ab>},{<ab>}}, score of 1 + 2 + 2 + 2 + 2 = 9.
{{<!!>},{<!!>},{<!!>},{<!!>}}, score of 1 + 2 + 2 + 2 + 2 = 9.
{{<a!>},{<a!>},{<a!>},{<ab>}}, score of 1 + 2 = 3.
What is the total score for all groups in your input?

Your puzzle answer was 12897.

The first half of this puzzle is complete! It provides one gold star: *

--- Part Two ---
Now, you're ready to remove the garbage.

To prove you've removed it, you need to count all of the characters within the garbage. The leading and trailing < and > don't count, nor do any canceled characters or the ! doing the canceling.

<>, 0 characters.
<random characters>, 17 characters.
<<<<>, 3 characters.
<{!>}>, 2 characters.
<!!>, 0 characters.
<!!!>>, 0 characters.
<{o"i!a,<{i<a>, 10 characters.
How many non-canceled characters are within the garbage in your puzzle input?


InputURL: https://adventofcode.com/2017/day/9/input
-----------------------------------------------Pakris solution:------------------------------


tableday9 = open("TableDay9.txt", "r").readlines()

# testgarbage1 = '<>'
# testgarbage2 = '<random characters>'
# testgarbage3 = '<<<<>'
# testgarbage4 = '<{!>}>'
# testgarbage5 = '<!!>'
# testgarbage6 = '<!!!>>'
# testgarbage7 = '<{o"i!a,<{i<a>'

# testgarbages = [testgarbage1 + testgarbage2 + testgarbage3 + testgarbage4 + testgarbage5 + testgarbage6 + testgarbage7]

# teststream1 = '{}'
# teststream2 = '{{{}}}'
# teststream3 = '{{},{}}'
# teststream4 = '{{{},{},{{}}}}'
# teststream5 = '{<{},{},{{}}>}'
# teststream6 = '{<a>,<a>,<a>,<a>}'
# teststream7 = '{{<a>},{<a>},{<a>},{<a>}}'
# teststream8 = '{{<!>},{<!>},{<!>},{<a>}}'

# teststreams = [teststream1 + teststream2 + teststream3 + teststream4 + teststream5 + teststream6 + teststream7, teststream8]

# newtest = '''{{{{{{<o,!!!!!!!!iuo!!!>}{{{o{{a<u}>},{<!>,<,">}},{},{{{<},e<i!!!>!!!{'u,!>!!!>}>'''

characterlist = list(str(tableday9).strip("['']"))

idx = 0
depth = 0
garbage = False
opengroup = False
score = 0
removedgarbage = 0

while idx < len(characterlist):
    #print("\nIndex: ", idx, "\nCharacter: ", characterlist[idx])
    #if garbage == True:
        #print("Garbage!")
    if characterlist[idx] == "!":
        idx += 2
        #print("Skip next")
        continue
    elif characterlist[idx] == "{" and garbage == False:
        depth += 1
        idx += 1
        opengroup = True
        #print("depth: ", depth)
        continue
    elif characterlist[idx] == "}" and garbage == False and opengroup == True:
        score += depth
        depth -= 1
        idx += 1
        if depth <= 0:
            opengroup = False
        #print("depth: ", depth)
        #print("Score: ", score)
        continue
    elif characterlist[idx] == "<" and garbage == False:
        idx += 1
        garbage = True
        continue
    elif characterlist[idx] == ">" and garbage == True:
        idx += 1
        garbage = False
        continue
    elif garbage == True:
        removedgarbage += 1
        idx += 1
        #print("Total removed garbage: ", removedgarbage)
        continue
    else:
        idx += 1
        continue

print(removedgarbage)




pass