from os import listdir
from os.path import abspath, isfile, dirname
from portage.versions import cpv_sort_key
from configparser import ConfigParser
import xml.etree.ElementTree as ET

class ebuild:

    def __init__(self, package, full_name):
        self.package = package
        self.path = package.path+'/'+full_name+'.ebuild'
        self.name = '-'.join(full_name.split('-')[0:-1])
        self.version = full_name.split('-')[-1]
        self.live = self.version[:4] == '9999'
        self.inherits = []
        self.vars = {}
        self.loaded = False

    def load(self):
        # TODO: Read ebuilds properly
        with open(self.path, 'r') as fp:
            for line in fp.readlines():
                line = line[:-1].split('#', maxsplit=1)[0]
                if len(line) > 0 and '=' in line:
                    s = [p.strip() for p in line.split('=', maxsplit=1)]
                    if len(s[1]) > 1 and s[1][0] == s[1][-1] == '"':
                        self.vars[s[0]] = s[1][1:-1]
                if line.startswith('inherit'):
                    self.inherits.extend(line.split(' ')[1:])
                if len(line) > 0 and line[-1] == '{':
                    break
        self.loaded = True

class manifest:
    def __init__(self, path):
        self.path = path
        self.loaded = False

    def load(self):
        with open(self.path, 'r') as fp:
            self.entries = [n[:-1].split(' ') for n in fp.readlines()]
        self.loaded = True

class metadata:
    def __init__(self, path):
        self.path = path
        self.maintainers = []
        self.remotes = []
        self.loaded = False

    def load(self):
        self.tree = ET.parse(self.path)
        self.root = self.tree.getroot()
        for maintainer in self.root.findall('./maintainer'):
            self.maintainers.append(maintainer.find('email').text)
        for upstream in self.root.findall('./upstream'):
            remote = upstream.find('remote-id')
            if remote is not None:
                self.remotes.append([remote.get('type'), remote.text])
        self.loaded = True

class package:
    def __init__(self, category, name):
        self.category = category
        self.name = name
        self.path = category.path+'/'+name
        self.ebuilds = []
        self.loaded = False

    @classmethod
    def from_path(self, path):
        path = abspath(path)
        if path[-1] == '/':
            path = path[:-1]
        cat = category.from_path(dirname(path))
        return package(cat, path.split('/')[-1])

    def load(self):
        self.full_name = self.category.name+'/'+self.name+'::'+self.category.repo.name
        ls = listdir(self.path)
        if 'Manifest' in ls:
            mf = manifest(self.path+'/Manifest')
            mf.load()
            self.manifest = mf
        if 'metadata.xml' in ls:
            md = metadata(self.path+'/metadata.xml')
            md.load()
            self.metadata = md
        ebuild_names = [n[:-7] for n in filter(lambda name: name[-7:] == '.ebuild', ls)]
        ebuild_names = sorted(ebuild_names, key=cpv_sort_key())[::-1]
        for name in ebuild_names:
            eb = ebuild(self, name)
            eb.load()
            self.ebuilds.append(eb)
        self.loaded = True

    def version_latest(self):
        for eb in self.ebuilds:
            if not eb.live:
                return eb.version
        return None

class category:
    def __init__(self, repo, name):
        self.repo = repo
        self.name = name
        self.path = repo.path+'/'+name
        self.packages = {}
        self.loaded = False

    @classmethod
    def from_path(self, path):
        path = abspath(path)
        if path[-1] == '/':
            path = path[:-1]
        repo = repository(dirname(path))
        return category(repo, path.split('/')[-1])

    def load(self):
        for name in listdir(self.path):
            if isfile(self.path+'/'+name):
                continue
            self.packages[name] = package(self, name)
        self.loaded = True

class repository:
    def __init__(self, path):
        self.path = abspath(path)
        self.categories = {}
        with open(self.path+'/profiles/repo_name', 'r') as fp:
            self.name = fp.read().replace("\n", '')
        self.loaded = False

    def load(self):
        for name in listdir(self.path):
            if '-' not in name or isfile(self.path+'/'+name):
                continue
            self.categories[name] = category(self, name)
        self.loaded = True

class repos:
    def __init__(self):
        self.from_path('/etc/portage/repos.conf')
        self.loaded = False

    @classmethod
    def from_path(self, path):
        self.path = abspath(path)
        self.repos = {}

    def load(self):
        conf_paths = []
        if isfile(self.path):
            conf_paths.append(self.path)
        else:
            for name in listdir(self.path):
                if name[-5:] == '.conf':
                    conf_paths.append(self.path+'/'+name)
        conf = ConfigParser()
        conf.read(conf_paths)
        for section in conf.sections():
            self.repos[section] = repository(conf[section]['location'])
        self.loaded = True