#!/usr/bin/env python3
# rank_hugo_themes.py

from jinja2 import Environment, FileSystemLoader
import re
import toml
from calendar import timegm
from time import strptime
from requests import get
from sys import argv as sys_argv
from base64 import b64decode
from ast import literal_eval

from sqlalchemy import create_engine, Column, Integer, VARCHAR, TEXT
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import deferred, sessionmaker

engine = create_engine('sqlite:///hugothemes.db', echo=False)
Base = declarative_base()
file_loader = FileSystemLoader('templates')
env = Environment(loader=file_loader)
template = env.get_template('base.html')


class Hugothemes_from_gitlab(Base):
    __tablename__ = 'hugothemes_from_gitlab'

    name = Column(VARCHAR, primary_key=True)
    url = Column(TEXT)
    commit_sha = Column(TEXT)
    gitlab_id = Column(TEXT)
    commit_date_in_seconds = Column(Integer)
    commit_date = Column(TEXT)
    star_count = Column(Integer)
    themes_toml_content = Column(TEXT)
    default_branch = Column(TEXT)

    def __repr__(self):
        return f"<Hugothemes_from_gitlab(name={self.name})>"


class Hugothemes(Base):
    __tablename__ = 'hugothemes'

    name = Column(VARCHAR, primary_key=True)
    ETag = Column(TEXT)
    url = Column(TEXT)
    commit_sha = Column(TEXT)
    commit_date = Column(TEXT)
    commit_date_in_seconds = Column(Integer)
    repo_ETag = Column(TEXT)
    stargazers_count = Column(Integer)
    themes_toml_ETag = Column(TEXT)
    themes_toml_content = deferred(Column(TEXT))
    tags_list = Column(TEXT)
    num_tags = Column(Integer)
    default_branch = Column(TEXT)
    features_list = Column(TEXT)
    num_features = Column(Integer)

    def __repr__(self):
        return f"<Hugothemes(name={self.name})>"


OLDTHEMESLISTREPO = 'gohugoio/hugoThemes'
THEMESLISTREPO = 'gohugoio/hugoThemesSiteBuilder'
THEMESLIST = []


def get_themes_name_list():
    return [x[11:] for x in THEMESLIST]


def get_gitlab_themes_list():
    return [x for x in THEMESLIST if x[0:10] == 'gitlab.com']


def get_gitlab_themes_name_list():
    return [x[11:] for x in THEMESLIST if x[0:10] == 'gitlab.com']


def get_github_themes_name_list():
    return [x[11:] for x in THEMESLIST if x[0:10] == 'github.com']


if len(sys_argv) == 2:
    headers = {'Authorization': 'token ' + sys_argv[1]}
else:
    headers = {}


def get_hugo_themes_list():
    themes_list_url = f"https://raw.githubusercontent.com/{THEMESLISTREPO}/main/themes.txt"
    response = get(themes_list_url)

    if response.status_code == 200:
        for x in response.text.splitlines():
            if (x[0:10] == 'gitlab.com' or x[0:10] == 'github.com'):
                THEMESLIST.append(x)

    print(response.status_code, get_hugo_themes_list.__name__)


def clean_up():
    themes_name_list = get_themes_name_list()
    session = sessionmaker(bind=engine)()
    hugo_themes_name_list = [theme[0] for theme in session.query(Hugothemes.name).all()]
    for theme_name in hugo_themes_name_list:
        if theme_name not in themes_name_list:
            removed_theme = session.query(Hugothemes).filter_by(name=theme_name).first()
            session.delete(removed_theme)
            session.commit()

    gitlab_themes_name_list = get_gitlab_themes_name_list()
    hugo_themes_from_gitlab_name_list = [theme[0] for theme in session.query(Hugothemes_from_gitlab.name).all()]
    for theme in hugo_themes_from_gitlab_name_list:
        if theme not in gitlab_themes_name_list:
            removed_theme = session.query(Hugothemes_from_gitlab).filter_by(name=theme).first()
            session.delete(removed_theme)
            session.commit()


def parse_gitlab_hugo_themes_list():
    session = sessionmaker(bind=engine)()
    gitlab_themes_list = get_gitlab_themes_list()
    for theme in gitlab_themes_list:
        theme_name = theme[11:]
        existing_theme = session.query(Hugothemes_from_gitlab).filter_by(name=theme_name).first()
        if existing_theme is None:
            session.add(Hugothemes_from_gitlab(name=theme_name, url=theme))
            session.commit()
        else:
            if existing_theme.url != theme:
                existing_theme.url = theme
                session.commit()


def parse_hugo_themes_list():
    session = sessionmaker(bind=engine)()
    for theme in THEMESLIST:
        theme_name = theme[11:]
        existing_theme = session.query(Hugothemes).filter_by(name=theme_name).first()
        if existing_theme is None:
            session.add(Hugothemes(name=theme_name, url=theme))
            session.commit()
        else:
            if existing_theme.url != theme:
                existing_theme.url = theme
                session.commit()


def get_gitlab_project_ids():
    session = sessionmaker(bind=engine)()
    themes = (theme[0] for theme in session.query(Hugothemes_from_gitlab.name).all())
    match = re.compile(r'(Project ID: )(\d{5,})')
    for theme in themes:
        gitlab_theme = session.query(Hugothemes_from_gitlab).filter_by(name=theme).one()
        if gitlab_theme.gitlab_id is None:
            response = get(f"https://{gitlab_theme.url}")
            if response.status_code == 200:
                gitlab_theme.gitlab_id = match.search(response.text).group(2)
                session.commit()
            if response.status_code == 404:
                print(response.status_code, get_gitlab_project_ids.__name__, theme)
            print(response.status_code, get_gitlab_project_ids.__name__)


def get_commit_info_for_hugo_themes():
    session = sessionmaker(bind=engine)()
    theme_names_from_github = get_github_themes_name_list()
    for hugo_theme in theme_names_from_github:
        theme = session.query(Hugothemes).filter_by(name=hugo_theme).one()
        api_call_url = f'https://api.github.com/repos/{theme.name}/commits/{theme.default_branch}'

        if theme.ETag is not None:
            headers['If-None-Match'] = theme.ETag
        else:
            if 'If-None-Match' in headers:
                del headers['If-None-Match']

        if len(headers) == 0:
            response = get(api_call_url)
        else:
            response = get(api_call_url, headers=headers)
        if response.status_code == 422:
            print(hugo_theme)
            quit()
        if response.status_code == 200:
            theme.ETag = response.headers['ETag'].lstrip('W/')
            result = response.json()
            theme.commit_date = result['commit']['author']['date']
            theme.commit_date_in_seconds = timegm(strptime(theme.commit_date, '%Y-%m-%dT%H:%M:%SZ'))
            theme.commit_sha = result['commit']['tree']['sha']
            session.commit()
        elif response.status_code == 403:
            print(response.status_code, get_commit_info_for_hugo_themes.__name__)
            quit()
        elif response.status_code == 404:
            print(response.status_code, get_commit_info_for_hugo_themes.__name__, hugo_theme)
        print(response.status_code, get_commit_info_for_hugo_themes.__name__)


def get_commit_info_for_hugo_themes_from_gitlab():
    session = sessionmaker(bind=engine)()
    theme_names_from_gitlab = get_gitlab_themes_name_list()
    # match = re.compile(r'(\.\d{3})(Z$)')
    for hugo_theme in theme_names_from_gitlab:
        theme = session.query(Hugothemes_from_gitlab).filter_by(name=hugo_theme).one()
        api_call_url = f'https://gitlab.com/api/v4/projects/{theme.gitlab_id}/repository/commits/{theme.default_branch}'

        response = get(api_call_url)
        if response.status_code == 200:
            result = response.json()
            # theme.commit_date = (match.sub(r'\2', result['created_at']))[0:19] + 'Z'
            theme.commit_date = result['created_at'][0:19] + 'Z'
            theme.commit_date_in_seconds = timegm(strptime(theme.commit_date, '%Y-%m-%dT%H:%M:%SZ'))
            theme.commit_sha = result['id']
            session.commit()
        elif response.status_code == 403:
            print(response.status_code, get_commit_info_for_hugo_themes_from_gitlab.__name__)
            quit()
        elif response.status_code == 404:
            print(response.status_code, get_commit_info_for_hugo_themes_from_gitlab.__name__, hugo_theme)
        print(response.status_code, get_commit_info_for_hugo_themes_from_gitlab.__name__)


def get_repo_info_for_hugo_themes():
    session = sessionmaker(bind=engine)()
    theme_names_from_github = get_github_themes_name_list()
    for hugo_theme in theme_names_from_github:
        theme = session.query(Hugothemes).filter_by(name=hugo_theme).one()
        api_call_url = 'https://api.github.com/repos/' + theme.name

        if theme.repo_ETag is not None:
            headers['If-None-Match'] = theme.repo_ETag
        else:
            if 'If-None-Match' in headers:
                del headers['If-None-Match']

        if len(headers) == 0:
            response = get(api_call_url)
        else:
            response = get(api_call_url, headers=headers)
        if response.status_code == 200:
            theme.repo_ETag = response.headers['ETag'].lstrip('W/')
            result = response.json()
            theme.stargazers_count = result['stargazers_count']
            theme.default_branch = result['default_branch']
            session.commit()
        elif response.status_code == 403:
            print(response.status_code, get_repo_info_for_hugo_themes.__name__)
            quit()
        elif response.status_code == 404:
            print(response.status_code, get_repo_info_for_hugo_themes.__name__, hugo_theme)
        print(response.status_code, get_repo_info_for_hugo_themes.__name__)


def get_repo_info_for_hugo_themes_from_gitlab():
    session = sessionmaker(bind=engine)()
    theme_names_from_gitlab = get_gitlab_themes_name_list()
    for hugo_theme in theme_names_from_gitlab:
        theme = session.query(Hugothemes_from_gitlab).filter_by(name=hugo_theme).one()
        api_call_url = f'https://gitlab.com/api/v4/projects/{theme.gitlab_id}'
        response = get(api_call_url)
        if response.status_code == 200:
            result = response.json()
            if theme.star_count != result['star_count']:
                theme.star_count = result['star_count']
            if theme.default_branch != result['default_branch']:
                theme.default_branch = result['default_branch']
            session.commit()
        elif response.status_code == 403:
            print(response.status_code, get_repo_info_for_hugo_themes_from_gitlab.__name__)
            quit()
        elif response.status_code == 404:
            print(response.status_code, get_repo_info_for_hugo_themes_from_gitlab.__name__, hugo_theme)
        print(response.status_code, get_repo_info_for_hugo_themes_from_gitlab.__name__)


def get_theme_dot_toml_for_each_hugo_themes():
    session = sessionmaker(bind=engine)()
    theme_names_from_github = get_github_themes_name_list()
    for hugo_theme in theme_names_from_github:
        theme = session.query(Hugothemes).filter_by(name=hugo_theme).one()
        if theme.name == 'gcushen/hugo-academic':
            theme_toml = 'wowchemy/theme.toml'
        else:
            theme_toml = 'theme.toml'
        api_call_url = f"https://api.github.com/repos/{theme.name}/contents/{theme_toml}"

        if theme.themes_toml_ETag is not None:
            headers['If-None-Match'] = theme.themes_toml_ETag
        else:
            if 'If-None-Match' in headers:
                del headers['If-None-Match']

        if len(headers) == 0:
            response = get(api_call_url)
        else:
            response = get(api_call_url, headers=headers)
        if response.status_code == 200:
            theme.themes_toml_ETag = response.headers['ETag'].lstrip('W/')
            result = response.json()
            theme.themes_toml_content = result['content']
            session.commit()
        elif response.status_code == 403:
            print(response.status_code, get_theme_dot_toml_for_each_hugo_themes.__name__)
            quit()
        elif response.status_code == 404:
            print(response.status_code, get_theme_dot_toml_for_each_hugo_themes.__name__, hugo_theme)
        print(response.status_code, get_theme_dot_toml_for_each_hugo_themes.__name__)


def get_theme_dot_toml_for_each_hugo_themes_from_gitlab():
    session = sessionmaker(bind=engine)()
    theme_names_from_gitlab = get_gitlab_themes_name_list()
    for hugo_theme in theme_names_from_gitlab:
        theme = session.query(Hugothemes_from_gitlab).filter_by(name=hugo_theme).one()
        api_call_url = f'https://gitlab.com/api/v4/projects/{theme.gitlab_id}/repository/files/theme.toml?ref={theme.default_branch}'
        response = get(api_call_url)
        if response.status_code == 200:
            result = response.json()
            theme.themes_toml_content = result['content']
            session.commit()
        elif response.status_code == 403:
            print(response.status_code, get_theme_dot_toml_for_each_hugo_themes_from_gitlab.__name__)
            quit()
        elif response.status_code == 404:
            print(response.status_code, get_theme_dot_toml_for_each_hugo_themes_from_gitlab.__name__, hugo_theme)
        print(response.status_code, get_theme_dot_toml_for_each_hugo_themes_from_gitlab.__name__)


def coalesce_themes():
    session = sessionmaker(bind=engine)()
    theme_names_from_gitlab = get_gitlab_themes_name_list()
    for hugo_theme in theme_names_from_gitlab:
        htfgitlab = session.query(Hugothemes_from_gitlab).filter_by(name=hugo_theme).one()
        theme = session.query(Hugothemes).filter_by(name=hugo_theme).first()
        if theme is None:
            session.add(Hugothemes(
                name=hugo_theme, url=htfgitlab.url, commit_sha=htfgitlab.commit_sha,
                commit_date=htfgitlab.commit_date, commit_date_in_seconds=htfgitlab.commit_date_in_seconds,
                stargazers_count=htfgitlab.star_count, themes_toml_content=htfgitlab.themes_toml_content
            ))
        else:
            if theme.url != htfgitlab.url: theme.url = htfgitlab.url
            if theme.commit_sha != htfgitlab.commit_sha: theme.commit_sha = htfgitlab.commit_sha
            if theme.commit_date != htfgitlab.commit_date: theme.commit_date = htfgitlab.commit_date
            if theme.commit_date_in_seconds != htfgitlab.commit_date_in_seconds:
                theme.commit_date_in_seconds = htfgitlab.commit_date_in_seconds
            if theme.stargazers_count != htfgitlab.star_count: theme.stargazers_count = htfgitlab.star_count
            theme.themes_toml_content = htfgitlab.themes_toml_content
        session.commit()


def update_features_list_for_each_hugo_themes():
    session = sessionmaker(bind=engine)()
    themes = [theme[0] for theme in session.query(Hugothemes.name).all()]
    match = re.compile(r'\s(\d+\.\d+\.\d+)\s')
    for hugo_theme in themes:
        theme = session.query(Hugothemes).filter_by(name=hugo_theme).one()
        if theme.themes_toml_content is not None:
            content = b64decode(theme.themes_toml_content).decode('utf-8')
            theme_toml = toml.loads(match.sub(r'"\1"\n', content))
            if 'features' in theme_toml:
                if len(theme_toml['features']) > 0:
                    theme_features = [feature.lower() for feature in theme_toml['features'] if len(feature) > 1]
                    if theme.num_features != len(theme_features): theme.num_features = len(theme_features)
                    if theme.num_features > 0:
                        if theme.features_list != str(theme_features): theme.features_list = str(theme_features)
                    else:
                        if theme.features_list is not None: theme.features_list = None
                else:
                    if theme.features_list is not None: theme.features_list = None
                    if theme.num_features != 0: theme.num_features = 0
            else:
                if theme.features_list is not None: theme.features_list = None
                if theme.num_features != 0: theme.num_features = 0
        else:
            if theme.features_list is not None: theme.features_list = None
            if theme.num_features != 0: theme.num_features = 0
        session.commit()


def get_corrected_tags(tags):
    result = []
    correct = True
    for tag in tags:
        if (len(tag) > 50): correct = False
    if not correct:
        for tag in tags:
            result += [x.lstrip() for x in tag.split(',')]
        return result
    else:
        return tags


def update_tags_list_for_each_hugo_themes():
    session = sessionmaker(bind=engine)()
    themes = [theme[0] for theme in session.query(Hugothemes.name).all()]
    match = re.compile(r'\s(\d+\.\d+\.\d+)\s')
    for hugo_theme in themes:
        theme = session.query(Hugothemes).filter_by(name=hugo_theme).one()
        if theme.themes_toml_content is not None:
            content = b64decode(theme.themes_toml_content).decode('utf-8')
            # put quotes around any unquoted double-dotted version numbers
            # (and add a newline afterwards)
            # because python toml libraries will error out on those
            theme_toml = toml.loads(match.sub(r'"\1"\n', content))
            if 'tags' in theme_toml:
                if len(theme_toml['tags']) > 0:
                    corrected_tags = get_corrected_tags(theme_toml['tags'])
                    theme_tags = [tag.lower() for tag in corrected_tags if len(tag) > 1]
                    if theme.num_tags != len(theme_tags): theme.num_tags = len(theme_tags)
                    if theme.num_tags > 0:
                        if theme.tags_list != str(theme_tags): theme.tags_list = str(theme_tags)
                    else:
                        if theme.tags_list is not None: theme.tags_list = None
                else:
                    if theme.tags_list is not None: theme.tags_list = None
                    if theme.num_tags != 0: theme.num_tags = 0
            else:
                if theme.tags_list is not None: theme.tags_list = None
                if theme.num_tags != 0: theme.num_tags = 0
        else:
            if theme.tags_list is not None: theme.tags_list = None
            if theme.num_tags != 0: theme.num_tags = 0
        session.commit()


def generate_report():
    session = sessionmaker(bind=engine)()
    hugo_themes = [
        {
            'name': theme.name,
            'commit': theme.commit_sha[0:6],
            'date': theme.commit_date[0:10],
            'date_in_seconds': theme.commit_date_in_seconds,
            'url': f'https://{theme.url}',
            'short_name': theme.name.split('/')[1],
            'num_stars': theme.stargazers_count,
            'tags': literal_eval(theme.tags_list) if theme.tags_list is not None else [],
            'features': literal_eval(theme.features_list) if theme.features_list is not None else [],
        } for theme in session.query(Hugothemes).all()
    ]
    output = template.render(themes=hugo_themes)
    index_page = open('hugo-themes-report/hugo-themes-report.html', 'w')
    index_page.write(output)
    index_page.close()


if __name__ == "__main__":
    '''
    update_tags_list_for_each_hugo_themes()
    update_features_list_for_each_hugo_themes()
    generate_report()
    '''
    get_hugo_themes_list()
    if len(THEMESLIST) > 300:
        clean_up()
        parse_hugo_themes_list()
        parse_gitlab_hugo_themes_list()
        get_gitlab_project_ids()
        get_repo_info_for_hugo_themes()
        get_repo_info_for_hugo_themes_from_gitlab()
        get_commit_info_for_hugo_themes()
        get_commit_info_for_hugo_themes_from_gitlab()
        get_theme_dot_toml_for_each_hugo_themes()
        get_theme_dot_toml_for_each_hugo_themes_from_gitlab()
        coalesce_themes()
        update_tags_list_for_each_hugo_themes()
        update_features_list_for_each_hugo_themes()
        generate_report()