# -*- coding: utf-8 -*-

# Copyright (c) 2016 Michael Gruener <michael.gruener@chaosmoon.net>
# Copyright (c) 2021 Felix Fontein <felix@fontein.de>
# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
# SPDX-License-Identifier: GPL-3.0-or-later

from __future__ import absolute_import, division, print_function


__metaclass__ = type

from ansible.module_utils.common.text.converters import to_text
from ansible.module_utils.six import PY3, binary_type
from ansible.module_utils.six.moves.http_client import responses as http_responses


def format_http_status(status_code):
    expl = http_responses.get(status_code)
    if not expl:
        return str(status_code)
    return "%d %s" % (status_code, expl)


def format_error_problem(problem, subproblem_prefix=""):
    error_type = problem.get(
        "type", "about:blank"
    )  # https://www.rfc-editor.org/rfc/rfc7807#section-3.1
    if "title" in problem:
        msg = 'Error "{title}" ({type})'.format(
            type=error_type,
            title=problem["title"],
        )
    else:
        msg = "Error {type}".format(type=error_type)
    if "detail" in problem:
        msg += ': "{detail}"'.format(detail=problem["detail"])
    subproblems = problem.get("subproblems")
    if subproblems is not None:
        msg = "{msg} Subproblems:".format(msg=msg)
        for index, problem in enumerate(subproblems):
            index_str = "{prefix}{index}".format(prefix=subproblem_prefix, index=index)
            msg = "{msg}\n({index}) {problem}".format(
                msg=msg,
                index=index_str,
                problem=format_error_problem(
                    problem, subproblem_prefix="{0}.".format(index_str)
                ),
            )
    return msg


class ModuleFailException(Exception):
    """
    If raised, module.fail_json() will be called with the given parameters after cleanup.
    """

    def __init__(self, msg, **args):
        super(ModuleFailException, self).__init__(self, msg)
        self.msg = msg
        self.module_fail_args = args

    def do_fail(self, module, **arguments):
        module.fail_json(msg=self.msg, other=self.module_fail_args, **arguments)


class ACMEProtocolException(ModuleFailException):
    def __init__(
        self,
        module,
        msg=None,
        info=None,
        response=None,
        content=None,
        content_json=None,
        extras=None,
    ):
        # Try to get hold of content, if response is given and content is not provided
        if content is None and content_json is None and response is not None:
            try:
                # In Python 2, reading from a closed response yields a TypeError.
                # In Python 3, read() simply returns ''
                if PY3 and response.closed:
                    raise TypeError
                content = response.read()
            except (AttributeError, TypeError):
                content = info.pop("body", None)

        # Make sure that content_json is None or a dictionary
        if content_json is not None and not isinstance(content_json, dict):
            if content is None and isinstance(content_json, binary_type):
                content = content_json
            content_json = None

        # Try to get hold of JSON decoded content, when content is given and JSON not provided
        if content_json is None and content is not None and module is not None:
            try:
                content_json = module.from_json(to_text(content))
            except Exception:
                pass

        extras = extras or dict()
        error_code = None
        error_type = None

        if msg is None:
            msg = "ACME request failed"
        add_msg = ""

        if info is not None:
            url = info["url"]
            code = info["status"]
            extras["http_url"] = url
            extras["http_status"] = code
            error_code = code
            if (
                code is not None
                and code >= 400
                and content_json is not None
                and "type" in content_json
            ):
                error_type = content_json["type"]
                if "status" in content_json and content_json["status"] != code:
                    code_msg = (
                        "status {problem_code} (HTTP status: {http_code})".format(
                            http_code=format_http_status(code),
                            problem_code=content_json["status"],
                        )
                    )
                else:
                    code_msg = "status {problem_code}".format(
                        problem_code=format_http_status(code)
                    )
                    if code == -1 and info.get("msg"):
                        code_msg = "error: {msg}".format(msg=info["msg"])
                subproblems = content_json.pop("subproblems", None)
                add_msg = " {problem}.".format(
                    problem=format_error_problem(content_json)
                )
                extras["problem"] = content_json
                extras["subproblems"] = subproblems or []
                if subproblems is not None:
                    add_msg = "{add_msg} Subproblems:".format(add_msg=add_msg)
                    for index, problem in enumerate(subproblems):
                        add_msg = "{add_msg}\n({index}) {problem}.".format(
                            add_msg=add_msg,
                            index=index,
                            problem=format_error_problem(
                                problem, subproblem_prefix="{0}.".format(index)
                            ),
                        )
            else:
                code_msg = "HTTP status {code}".format(code=format_http_status(code))
                if code == -1 and info.get("msg"):
                    code_msg = "error: {msg}".format(msg=info["msg"])
                if content_json is not None:
                    add_msg = " The JSON error result: {content}".format(
                        content=content_json
                    )
                elif content is not None:
                    add_msg = " The raw error result: {content}".format(
                        content=to_text(content)
                    )
            msg = "{msg} for {url} with {code}".format(msg=msg, url=url, code=code_msg)
        elif content_json is not None:
            add_msg = " The JSON result: {content}".format(content=content_json)
        elif content is not None:
            add_msg = " The raw result: {content}".format(content=to_text(content))

        super(ACMEProtocolException, self).__init__(
            "{msg}.{add_msg}".format(msg=msg, add_msg=add_msg), **extras
        )
        self.problem = {}
        self.subproblems = []
        self.error_code = error_code
        self.error_type = error_type
        for k, v in extras.items():
            setattr(self, k, v)


class BackendException(ModuleFailException):
    pass


class NetworkException(ModuleFailException):
    pass


class KeyParsingError(ModuleFailException):
    pass