import os
import subprocess
import sys
from datetime import datetime, timedelta

import requests

LIMIT_COMMITS_30_DAYS = 50  # Has to be <= 100
LIMIT_STARS = 200
LIMIT_NLOC = 100000
MARGIN = 0.1


def get_stars_info(owner, repo, token):
    headers = {"Authorization": f"token {token}"}
    stars_url = f"https://api.github.com/repos/{owner}/{repo}"
    stars_response = requests.get(stars_url, headers=headers)

    if stars_response.status_code != 200:
        return -1

    stars = stars_response.json()["stargazers_count"]
    return stars


def get_commits_last_30_days(owner, repo, token):
    headers = {"Authorization": f"token {token}"}
    since = (datetime.now() - timedelta(days=30)).isoformat()
    print(since)
    commits_url = f"https://api.github.com/repos/{owner}/{repo}/commits?since={since}&per_page={LIMIT_COMMITS_30_DAYS}"
    commits_response = requests.get(commits_url, headers=headers)

    if commits_response.status_code != 200:
        return -1

    commits_30_days = len(commits_response.json())
    return commits_30_days


def get_lines_of_code(owner, repo):
    repo_url = f"https://github.com/{owner}/{repo}.git"
    clone_dir = os.path.expanduser("~/temp/PICable")

    try:
        subprocess.run(["git", "clone", repo_url, clone_dir], check=True, stdout=sys.stdout, stderr=sys.stderr)
    except:
        return -1

    result = subprocess.run(["sloccount", clone_dir], capture_output=True, text=True, check=True)
    for line in result.stdout.splitlines():
        if "Total Physical Source Lines of Code (SLOC)" in line:
            loc = int(line.split()[8].replace(",", ""))
            break
    else:
        loc = 0
    subprocess.run(["rm", "-rf", clone_dir], check=True)

    return loc


def PICable(owner, repository, token):
    margin_percentage = round(MARGIN * 100)
    res = ""

    stars = get_stars_info(owner, repository, token)

    if stars == -1:
        return "The repository does not exist or the token is invalid. :x:"

    if stars >= LIMIT_STARS:
        res += f"The repository has at least {LIMIT_STARS} stars. :white_check_mark:\n"
    elif stars >= LIMIT_STARS * (1 - MARGIN):
        res += f"The repository has {stars}, which is close to the limit of {LIMIT_STARS} stars, considering a {margin_percentage}% margin. :warning:\n"
    else:
        res += f"The repository has {stars} stars, which is way below the limit of {LIMIT_STARS} stars, even if considering a {margin_percentage}% margin. :x:\n"

    commits_30_days = get_commits_last_30_days(owner, repository, token)

    if commits_30_days == -1:
        return "The repository does not exist or the token is invalid. :x:"

    if commits_30_days >= LIMIT_COMMITS_30_DAYS:
        res += f"The repository has at least {LIMIT_COMMITS_30_DAYS} commits in the last 30 days. :white_check_mark:\n"
    elif commits_30_days >= LIMIT_COMMITS_30_DAYS * (1 - MARGIN):
        res += f"The repository has {commits_30_days} commits in the last 30 days, which is close to the limit of {LIMIT_COMMITS_30_DAYS} commits, considering a {margin_percentage}% margin. :warning:\n"
    else:
        res += f"The repository has {commits_30_days} commits in the last 30 days, which is way below the limit of {LIMIT_COMMITS_30_DAYS} commits, even if considering a {margin_percentage}% margin. :x:\n"

    nloc = get_lines_of_code(owner, repository)

    if nloc == -1:
        return "The repository does not exist. :x:"

    if nloc >= LIMIT_NLOC:
        res += f"The repository has at least {LIMIT_NLOC} lines of code. :white_check_mark:\n"
    elif nloc >= LIMIT_NLOC * (1 - MARGIN):
        res += f"The repository has {nloc} lines of code, which is close to the limit of {LIMIT_NLOC} lines of code, considering a {margin_percentage}% margin. :warning:\n"
    else:
        res += f"The repository has {nloc} lines of code, which is way below the limit of {LIMIT_NLOC} lines of code, even if considering a {margin_percentage}% margin. :x:\n"

    res += "\n"

    repository_url = f"https://www.github.com/{owner}/{repository}"

    if any(
        [
            stars < LIMIT_STARS * (1 - MARGIN),
            commits_30_days < LIMIT_COMMITS_30_DAYS * (1 - MARGIN),
            nloc < LIMIT_NLOC * (1 - MARGIN),
        ]
    ):
        res += f"The repository {repository_url} is not PICable. There are some requirements that are way below the requested limits. :x:\n"
    elif all([stars >= LIMIT_STARS, commits_30_days >= LIMIT_COMMITS_30_DAYS, nloc >= LIMIT_NLOC]):
        res += f"The repository {repository_url} is PICable. :white_check_mark:\n"
    else:
        res += f"The repository {repository_url} is almost PICable. There are certain requirements which are almost met by this repository. Consult with a professor before proceeding. :warning:\n"

    return res