# -*- coding: utf-8 -*-
#
import requests
from requests.auth import HTTPBasicAuth
from io import BytesIO
from lxml import etree
from collections import namedtuple
from datetime import datetime
from obsapi.formatter import Formatter

try:
    import osc.conf as osc_conf
    osc_conf.get_config()
except:
    osc_conf = None


LSItem = namedtuple('LSItem', 'name md5 size mtime')
Directory = namedtuple('Directory', 'name rev vrev srcmd5')
SourceInfo = namedtuple('SourceInfo', 'package rev vrev srcmd5 verifymd5')
Binary = namedtuple('Binary', 'filename size mtime')

DEFAULTAPIURL = 'https://api.opensuse.org'

emptyxml = '<empty></empty>'
EMPTYTREE = etree.fromstring(emptyxml)
EMPTY = EMPTYTREE.xpath('.')[0]


class FileInfo(object):
    file_str_template = ("{filename}"
                         "size   : {size}"
                         "mtime  : {mtime}"
                         )

    pkg_str_template = ("{filename}"
                        "Name        : {name}"
                        "Version     : {version}"
                        "Release     : {release}"
                        "Architecture: {arch}"
                        "Size        : {size}"
                        "Source RPM  : {source}"
                        "Build Date  : {mtime}"
                        "Summary     : {summary}"
                        "Description :"
                        "{description}"
                        "Provides    :"
                        "{provides}"
                        )

    src_str_template = ("{filename}"
                        "Name        : {name}"
                        "Version     : {version}"
                        "Release     : {release}"
                        "Architecture: {arch}"
                        "Size        : {size}"
                        "Build Date  : {mtime}"
                        "Summary     : {summary}"
                        "Description :"
                        "{description}"
                        )

    def __init__(self, xml):
        self.finfo = etree.fromstring(xml)
        self.filename = self.finfo.get('filename', None)
        self.formatter = Formatter(self)

    @property
    def info(self):
        info = {'filename': [self.filename]}
        for item in self.finfo:
            info.setdefault(item.tag, []).append(item.text)

        for item, value in info.items():
            if len(value) == 1:
                info[item] = value[0]
            # info[item] = '\n'.join(value)

        return info

    def __str__(self):
        return self.formatter.render()

    def __getattr__(self, attr):
        try:
            values = [value.text for value in self.finfo.findall(attr)]
        except:
            values = [None]

        if len(values) == 1:
            return values[0]
        else:
            return values

    @property
    def datetime(self):
        if self.mtime:
            return datetime.fromtimestamp(int(self.mtime))

    @property
    def xml(self):
        return etree.tostring(self.finfo)

    @property
    def is_pkg(self):
        if self.arch:
            return True
        else:
            return False

    @property
    def is_src(self):
        if self.source:
            return False
        else:
            return True

    @property
    def is_debug_info(self):
        if '-' in self.name:
            if self.name.split('-')[-1] in ('debuginfo', 'debugsource'):
                return True

        return False


class ObsApi(object):

    default_xml = '<None/>'

    def __init__(self, apiurl=None):
        self.apiurl = apiurl or DEFAULTAPIURL
        self.__get_auth()
        self._response = None
        self.retries = 3
        self.verify_ssl = True

    def __get_auth(self):
        conf = {}
        if osc_conf:
            try:
                conf = osc_conf.get_apiurl_api_host_options(self.apiurl)
            except:
                pass

        user = conf.get('user', None)
        password = conf.get('pass', None)
        if user and password:
            self.auth = HTTPBasicAuth(user, password)
        else:
            self.auth = None

    def __api_get(self, api, payload=None):

        def try_get():
            url = '{0}/{1}'.format(self.apiurl, api)
            r = requests.get(url,
                             auth=self.auth,
                             params=payload,
                             verify=self.verify_ssl)
            self._response = r
            return r

        for attempt in range(self.retries):
            r = try_get()
            if self.success:
                return r
            print("Failed: %s" % self.response)
            print("retry: %s" % (attempt + 1))

        if self.retries == 0:
            r = try_get()

        return r

    def __api_put(self, api, data):

        url = '{0}/{1}'.format(self.apiurl, api)
        r = requests.put(url,
                         auth=self.auth,
                         data=data,
                         verify=self.verify_ssl)
        self._response = r

        return r

    def __xml2etree(self, xml):
        xml = xml.encode('utf-8')
        parser = etree.XMLParser(remove_blank_text=True)
        return etree.parse(BytesIO(xml), parser).xpath('.')[0]

    @property
    def response(self):
        '''Return requests response from last api query'''
        return self._response

    @property
    def success(self):
        '''Return True if last api query was successful, else
        return False'''
        return self._response.status_code == requests.codes.ok

    def get_xml(self, api, payload=None):
        r = self.__api_get(api, payload)
        if not self.success:
            print self.response
            return self.default_xml

        return r.text

    def put_xml(self, api, data):
        r = self.__api_put(api, data)
        return r

    def get_meta(self, prj, pkg=None):
        if pkg is not None:
            api = '/source/{}/{}/_meta'.format(prj, pkg)
        else:
            api = '/source/{}/_meta'.format(prj)
        return self.get_xml(api)

    def put_meta(self, prj, pkg=None, xml=None):
        if pkg is not None:
            api = '/source/{}/{}/_meta'.format(prj, pkg)
        else:
            api = '/source/{}/_meta'.format(prj)
        return self.put_xml(api, data=xml)

    def get_project_meta(self, prj):
        return self.get_meta(prj)

    def put_project_meta(self, prj, xml):
        return self.put_meta(prj, xml)

    def get_package_meta(self, prj, pkg):
        return self.get_meta(prj, pkg)

    def put_package_meta(self, prj, pkg, xml):
        return self.put_meta(prj, pkg, xml)

    def ls(self, prj=None, pkg=None, repo=None, arch=None):
        if repo and arch:
            return self.binaries_ls(prj, pkg, repo, arch)
        if prj and pkg:
            return self.package_ls(prj, pkg)
        if prj:
            return self.project_ls(prj)

        return None

    def project_ls(self, prj):
        api = '/source/{}'.format(prj)
        xml = self.get_xml(api)
        d = etree.fromstring(xml)
        lsitems = [e.get('name') for e in d.findall('entry')]

        return lsitems

    def package_ls(self, prj, pkg):
        api = '/source/{}/{}'.format(prj, pkg)
        xml = self.get_xml(api)
        d = etree.fromstring(xml)
        directory = Directory(d.get('name'),
                              d.get('rev'),
                              d.get('vrev'),
                              d.get('srcmd5')
                              )
        lsitems = []
        for item in d.findall('entry'):
            lsitems.append(LSItem(item.get('name'),
                                  item.get('md5'),
                                  item.get('size'),
                                  item.get('mtime')
                                  )
                           )
        return (directory, lsitems)

    def get_source_info(self, prj, pkg):
        api = '/source/{}/{}'.format(prj, pkg)
        query = {'view': 'info'}
        xml = self.get_xml(api, payload=query)
        tree = etree.fromstring(xml)
        sinfo = SourceInfo(tree.get('package'),
                           tree.get('rev'),
                           tree.get('vrev'),
                           tree.get('srcmd5'),
                           tree.get('verifymd5')
                           )

        return sinfo

    def binaries_ls(self, prj, pkg, repo, arch):
        api = '/build/{}/{}/{}/{}'.format(prj, repo, arch, pkg)
        xml = self.get_xml(api)
        blist = etree.fromstring(xml)
        binaries = [Binary(filename=i.get('filename'),
                           size=i.get('size'),
                           mtime=i.get('mtime'))
                    for i in blist.findall('binary')]

        return binaries

    def get_binary_fileinfo(self, prj, pkg, repo, arch, binary):
        payload = dict(view='fileinfo')
        api = '/build/{}/{}/{}/{}/{}'.format(prj, repo, arch, pkg, binary)
        xml = self.get_xml(api, payload)
        return FileInfo(xml)

    def get_project_repos(self, prj):
        api = '/build/{}'.format(prj)
        xml = self.get_xml(api)
        directory = etree.fromstring(xml)

        entries = []
        for entry in directory.findall('entry'):
            entries.append(entry.get('name'))

        return entries

    def get_package_version(self, prj, pkg, repo, arch, full=True):
        binaries = self.get_binaries(prj, pkg, repo, arch)
        r_finfo = ''
        for item in binaries:
            if item.filename.endswith('.src.rpm'):
                r_finfo = self.get_binary_fileinfo(prj,
                                                   pkg,
                                                   repo,
                                                   arch,
                                                   item.filename
                                                   )
                break

        if r_finfo:
            finfo = etree.fromstring(r_finfo)
            version = finfo.find('version').text
            release = finfo.find('release').text
            if full:
                version = '%s-%s' % (version, release)
        else:
            version = ''

        return version

    def get_build_config(self, prj, repo):
        api = '/build/{}/{}/_buildconfig'.format(prj, repo)
        return self.get_xml(api)

    def get_build_info(self, prj, pkg, repo, arch):
        api = '/build/{}/{}/{}/{}/_buildinfo'.format(prj, repo, arch, pkg)
        return self.get_xml(api)

    def get_nothing_provides(self, prj, pkg, repo, arch):
        tree = etree.fromstring(self.get_build_info(prj, pkg, repo, arch))
        errors = (tree.xpath('error') or [EMPTY])[0]
        nothing_provides = []

        if errors is None or 'unresolvable' not in errors:
            return nothing_provides

        for unresolvable in [u.strip() for
                             u in errors.split('unresolvable:')[1].split(',')]:
            if unresolvable.startswith('nothing provides'):
                nothing_provides.append(unresolvable.split(
                                        'nothing provides ')[1])

        return nothing_provides

    def get_vendor(self, prj, repo=None):
        ''' Attempt to get the value of the %vendor macro if exists
        Search build configs from all repos. Take first occurance.
        '''
        project_repos = self.get_project_repos(prj)
        repos = [repo] or project_repos
        vendor = None
        for repo in repos:
            for line in self.get_build_config(prj, repo).splitlines():
                if line.strip().startswith('%vendor '):
                    vendor = line.split(' ', 1)[1]

            # We take the first occurance
            if vendor is not None:
                break

        return vendor

    def lock(self, prj, pkg=None):
        if pkg is None:
            xml = self.get_project_meta(prj)
            put = self.put_project_meta
        else:
            xml = self.get_package_meta(prj, pkg)
            put = self.put_package_meta

        meta = self.__xml2etree(xml)
        if meta.tag not in ['project', 'package']:
            if pkg:
                raise Exception('Failed to lock package. %s/%s' % (prj, pkg))
            else:
                raise Exception('Failed to lock project. %s' % prj)

        if meta.find('lock') is not None:
            return 'Already Locked'

        lock = self.__xml2etree('<lock><enable/></lock>')
        meta.append(lock)
        if pkg:
            r = put(prj, pkg, etree.tostring(meta))
        else:
            r = put(prj, etree.tostring(meta))

        return r