'''
Created on Aug. 14, 2019

@author: KJNETHER

going to receive a Github context that was generated by an github action

Evaluates it to determine if this action is part of a pullrequest that has been 
merged and closed.

'''
import json
import pprint
import sys

import requests


class GitHubAPIWrapper(object):
    
    def __init__(self, github_context):
        
        self.github_context = json.loads(github_context)
        self.pp = pprint.PrettyPrinter(indent=4)
        #self.pp.pprint(self.github_context)
        
    def get_after_sha(self):
        '''
        :return: The sha of the commit that is associated with the after event 
                 in github.
        '''
        return self.github_context['event']['after']
    
    def get_sha(self):
        return self.github_context['sha']
    
    def get_events(self):
        url = self.github_context['event']['repository']['events_url']
        resp = requests.get(url)
        data = resp.json()
        return data
        
    def get_pr_events(self):
        events = self.get_events()
        pr_events = []
        for event in events:
            if event['type'] == 'PullRequestEvent':
                pr_events.append(event)
        return pr_events

    
    def get_pr_events_closed(self):
        pr_events = self.get_pr_events()
        closed_pr = []
        for event in pr_events:
            if event['payload']['action'] == 'closed':
                closed_pr.append(event)
        return closed_pr
                
    def get_pr_event_for_context(self):
        pr_events = self.get_pr_events()
        sha = self.get_sha()
        event = None
        for pr_event in pr_events:
            pr_event['payload']['action'] 
            
            if sha == pr_event['payload']['pull_request']['merge_commit_sha']:
                event = pr_event
                break
        #self.pp.pprint(event)
        return event
            
    def is_context_a_closed_pr(self):
        event = self.get_pr_event_for_context()
        retVal = True
        if event is None:
            retVal = False
        return retVal        

if __name__ == '__main__':
    
    # dev
    #context_file = 'gha_context.json'
    context_file = sys.argv[1]
    fh = open('gha_context.json', 'r')
    jsontxt = fh.read()
    fh.close()

    gha = GitHubAPIWrapper(jsontxt)
    gha.get_pr_event_for_context()
    is_pr_closed = gha.is_context_a_closed_pr()
    print(is_pr_closed)