import json
import os
from datetime import datetime


def _time_points_until_today():

    year = 2017
    month = 1
    day = 1
    today = datetime.today()
    date = datetime(year, month, day)

    while date < today:
        yield date

        day += 14
        if day > 15:
            day = 1
            month += 1

        if month > 12:
            month = 1
            year += 1

        date = datetime(year, month, day)


time_points_until_today = list(_time_points_until_today())


def get_lists_history():

    os.system("rm -rf ./.work")
    os.system("git clone https://github.com/YunoHost/apps ./.work/apps")

    for t in time_points_until_today:
        print(t.strftime("%b %d %Y"))

        # Fetch repo at this date
        cmd = 'cd ./.work/apps; git checkout `git rev-list -1 --before="%s" master`'
        os.system(cmd % t.strftime("%b %d %Y"))

        if t < datetime(2019,4,4):
            # Merge community and official
            community = json.loads(open("./.work/apps/community.json").read())
            official = json.loads(open("./.work/apps/official.json").read())
            for key in official:
                official[key]["state"] = "official"
            merged = {}
            merged.update(community)
            merged.update(official)
        else:
            merged = json.loads(open("./.work/apps/apps.json").read())

        # Save it
        json.dump(merged, open('./.work/merged_lists.json.%s' % t.strftime("%y-%m-%d"), 'w'))


def make_count_summary():

    states = ["official", "working", "inprogress", "notworking"]
    history = []

    last_time_point = time_points_until_today[-1]
    json_at_last_time_point = json.loads(open("./.work/merged_lists.json.%s" % last_time_point.strftime("%y-%m-%d")).read())
    relevant_apps_to_track = [app
                              for app, infos in json_at_last_time_point.items()
                              if infos.get("state") in ["working", "official"]]
    history_per_app = {app: [] for app in relevant_apps_to_track}

    for d in time_points_until_today:

        print("Analyzing %s ..." % d.strftime("%y-%m-%d"))

        # Load corresponding json
        j = json.loads(open("./.work/merged_lists.json.%s" % d.strftime("%y-%m-%d")).read())
        d_label = d.strftime("%b %d %Y")

        summary = {}
        summary["date"] = d_label
        for state in states:
            summary[state] = len([k for k, infos in j.items() if infos["state"] == state])

        for level in range(0, 9):
            summary["level-%s" % level] = len([k for k, infos in j.items()
                                               if infos["state"] in ["working", "official"]
                                               and infos.get("level", None) == level])

        history.append(summary)

        for app in relevant_apps_to_track:

            infos = j.get(app, {})

            if not infos or infos.get("state") not in ["working", "official"]:
                level = -1
            else:
                level = infos.get("level", -1)
                try:
                    level = int(level)
                except:
                    level = -1

            history_per_app[app].append({
                "date": d_label,
                "level": infos.get("level", -1)
            })

    json.dump(history, open('count_history.json', 'w'))

    os.system("mkdir -p per_app/")
    for app in relevant_apps_to_track:
        json.dump(history_per_app[app], open('per_app/history_%s.json' % app, 'w'))


get_lists_history()
make_count_summary()