# encoding: utf-8

# The MIT License
#
# Copyright (c) 2014-2015 Sebastian Ramacher
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

from __future__ import absolute_import

from locale import getpreferredencoding
from six.moves.urllib_parse import quote as urlquote, urljoin, urlparse
from string import Template
import errno
import requests
import subprocess
import unicodedata

from .translations import _


class PasteFailed(Exception):
    pass


class PastePinnwand(object):
    def __init__(self, url, expiry, show_url, removal_url):
        self.url = url
        self.expiry = expiry
        self.show_url = show_url
        self.removal_url = removal_url

    def paste(self, s):
        """Upload to pastebin via json interface."""

        url = urljoin(self.url, "/json/new")
        payload = {"code": s, "lexer": "pycon", "expiry": self.expiry}

        try:
            response = requests.post(url, data=payload, verify=True)
            response.raise_for_status()
        except requests.exceptions.RequestException as exc:
            raise PasteFailed(exc.message)

        data = response.json()

        paste_url_template = Template(self.show_url)
        paste_id = urlquote(data["paste_id"])
        paste_url = paste_url_template.safe_substitute(paste_id=paste_id)

        removal_url_template = Template(self.removal_url)
        removal_id = urlquote(data["removal_id"])
        removal_url = removal_url_template.safe_substitute(
            removal_id=removal_id
        )

        return (paste_url, removal_url)


class PasteHelper(object):
    def __init__(self, executable):
        self.executable = executable

    def paste(self, s):
        """Call out to helper program for pastebin upload."""

        try:
            helper = subprocess.Popen(
                "",
                executable=self.executable,
                stdin=subprocess.PIPE,
                stdout=subprocess.PIPE,
            )
            helper.stdin.write(s.encode(getpreferredencoding()))
            output = helper.communicate()[0].decode(getpreferredencoding())
            paste_url = output.split()[0]
        except OSError as e:
            if e.errno == errno.ENOENT:
                raise PasteFailed(_("Helper program not found."))
            else:
                raise PasteFailed(_("Helper program could not be run."))

        if helper.returncode != 0:
            raise PasteFailed(
                _(
                    "Helper program returned non-zero exit "
                    "status %d." % (helper.returncode,)
                )
            )

        if not paste_url:
            raise PasteFailed(_("No output from helper program."))
        else:
            parsed_url = urlparse(paste_url)
            if not parsed_url.scheme or any(
                unicodedata.category(c) == "Cc" for c in paste_url
            ):
                raise PasteFailed(
                    _(
                        "Failed to recognize the helper "
                        "program's output as an URL."
                    )
                )

        return paste_url, None