# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import copy
import warnings

import otc_metadata.data

__all__ = ["Services"]

BUILTIN_DATA = otc_metadata.data.read_data("services.yaml")


def _normalize_type(service_type):
    if service_type:
        return service_type.replace("_", "-")


class Services(object):
    """Encapsulation of the OTC Services data"""

    def __init__(self):
        self._service_data = BUILTIN_DATA

    def _sort_data(self):
        # Sort every doc item by key
        sorted_docs = []
        for doc in self._service_data["documents"]:
            sorted_docs.append(dict(sorted(doc.items(), key=lambda kv: kv[0])))

        # sort docs list by <service_type>_<title>
        self._service_data["documents"] = sorted(
            sorted_docs,
            key=lambda x: f"{x.get('service_type')}{x.get('title')}",
        )
        # sort services by <service_type>_<service_title>
        self._service_data["services"] = sorted(
            self._service_data["services"],
            key=lambda x: f"{x.get('service_type')}{x.get('service_title')}",
        )
        # sort service categories by <name>_<title>
        self._service_data["service_categories"] = sorted(
            self._service_data["service_categories"],
            key=lambda x: f"{x.get('name')}{x.get('title')}",
        )
        other = {'name': 'other', 'title': 'Other'}
        if other in self._service_data["service_categories"]:
            self._service_data["service_categories"].remove(other)
            self._service_data["service_categories"].append(other)

    def _rewrite_data(self):
        otc_metadata.data.rewrite_data("services.yaml", self._service_data)

    @property
    def all_services(self):
        "Service Categories data listing."
        return copy.deepcopy(self._service_data["services"])

    @property
    def all_docs(self):
        "Service Docs data listing."
        return copy.deepcopy(self._service_data["documents"])

    @property
    def service_dict(self):
        "Service Docs data listing."
        res = dict()
        for srv in self.all_services:
            res[srv["service_type"]] = copy.deepcopy(srv)
        return res

    @property
    def service_categories(self):
        """List services categories"""
        res = []
        for cat in self._service_data["service_categories"]:
            res.append(copy.deepcopy(cat))
        return res

    def services_by_category(self, category, environment=None):
        """List services matching category"""
        res = []
        for srv in self.all_services:
            if environment:
                if "environment" in srv and srv["environment"] != environment:
                    continue
            if srv["service_category"] == category:
                res.append(copy.deepcopy(srv))
        return res

    def services_with_docs_by_category(self, category, environment=None):
        """Retrieve service category docs data

        :param str category: Optional Category filter
        :param str env: Optional service environment. Influeces "repository"
            field
        """
        res = dict()
        services = self.service_dict
        for doc in self.all_docs:
            cat = doc["service_type"]
            service = services.get(cat)
            if not service:
                warnings.warn("No Service defition of type %s" % (cat))
                continue
            if category and service["service_category"] != category:
                continue
            res.setdefault(cat, service)
            res_doc = copy.deepcopy(doc)
            res_doc.update(**service)
            if environment:
                if "environment" in doc and doc["environment"] != environment:
                    continue
            res[cat].setdefault("docs", [])
            res[cat]["docs"].append(res_doc)
        return res

    def service_types_with_doc_types(self, environment=None):
        """Retrieve type and title from services and corresponding docs.
            As well as a list of all available doc types with title.

        :param str environment: Optional service environment.
        """
        service_list = []
        docs = []

        for service in self.all_services:
            if "environment" in service:
                if service["environment"] != environment:
                    continue
            if not service["service_title"]:
                continue
            if not service["service_type"]:
                continue

            doc_list = []
            for doc in self.all_docs:
                if "environment" in doc:
                    if doc["environment"] != environment:
                        continue
                if doc["service_type"] == service["service_type"]:
                    doc_list.append({
                        "title": doc["title"],
                        "type": doc["type"]
                    })

                new_doc = {
                    "type": doc["type"],
                    "title": doc["title"]
                }
                type_exists = any(
                    doc_dict["type"] == new_doc["type"] for doc_dict in docs
                )
                if not type_exists:
                    docs.append(new_doc)

            service_list.append({
                "service_title": service["service_title"],
                "service_type": service["service_type"],
                "docs": doc_list
            })

        res = {
            "services": service_list,
            "docs": docs
        }

        return res

    def docs_by_service_category(self, category, environment=None):
        """List services matching category

        :param str category: Category name
        :param str env: Optional service environment. Influeces "repository"
            field
        """
        res = []
        services = self.service_dict
        for doc in self.all_docs:
            cat = doc["service_type"]
            service = services.get(cat)
            if not service:
                warnings.warn("No Service defition of type %s" % (cat))
                continue
            if service["service_category"] == category:
                res_doc = copy.deepcopy(doc)
                res_doc.update(**service)
                if environment:
                    for srv_env in service["repositories"]:
                        if srv_env.get("environment") == environment:
                            res_doc["repository"] = srv_env["repo"]
                res.append(res_doc)
        return res

    def docs_by_service_type(self, service_type):
        """List documents of the service

        :param str service_type: Service type
        :returns: generator for documents
        """
        for doc in self.all_docs:
            if doc["service_type"] != service_type:
                continue
            yield copy.deepcopy(doc)

    def all_docs_full(self, environment):
        """Return list or documents with full service data"""
        services = self.service_dict
        for doc in self.all_docs:
            if not doc["service_type"] in services:
                print(f"No service type {doc['service_type']}")
                continue
            service = services[doc["service_type"]]
            res_doc = copy.deepcopy(doc)
            res_doc.update(**service)
            if environment:
                for srv_env in service["repositories"]:
                    if srv_env.get("environment") == environment:
                        res_doc["repository"] = srv_env["repo"]
                for srv_assignees in service.get("assignees", []):
                    if srv_assignees.get("environment") == environment:
                        res_doc["assignees"] = srv_assignees["names"]
            yield res_doc

    def docs_html_by_category(self, environment):
        """Generate structure for doc-exports repository"""
        doc_struct = dict()
        for srv in self.all_services:
            doc_struct.setdefault(srv["service_category"], [])
            srv_res = dict(
                service_title=srv["service_title"],
                service_type=srv["service_type"],
                service_category=srv["service_category"],
                service_environment=environment,
                docs=[],
            )
            if "teams" in srv:
                srv_res["teams"] = [
                    x for x in srv["teams"] if x["permission"] == "write"
                ]
            if "repositories" in srv and environment:
                for repo in srv["repositories"]:
                    if (
                        "environment" in repo
                        and repo["environment"] == environment
                    ):
                        srv_res["repository"] = repo["repo"]
            for doc in self.all_docs:
                if (
                    "html_location" in doc
                    and doc["service_type"] == srv_res["service_type"]
                ):
                    doc_res = dict(
                        html_location=doc["html_location"],
                        rst_location=doc["rst_location"],
                        title=doc["title"],
                        type=doc.get("type", "dummy"),
                        link=doc["link"],
                    )
                    if "pdf_name" in doc:
                        doc_res["pdf_name"] = doc["pdf_name"]
                    if "hc_location" in doc:
                        doc_res["hc_location"] = doc["hc_location"]
                    srv_res["docs"].append(doc_res)
            if len(srv_res["docs"]) > 0:
                doc_struct[srv["service_category"]].append(srv_res)

        return dict(categories=doc_struct)

    def get_service_with_docs_by_service_type(self, service_type):
        """Retrieve service and service docs by service_type

        :param str service_type: Filter by service_type
        """
        res = dict()
        res["service"] = {}
        docs = []
        services = self._service_data
        for doc in services["documents"]:
            if doc["service_type"] == service_type:
                docs.append(doc)
        res["documents"] = docs
        for service in services["services"]:
            if service["service_type"] == service_type:
                res["service"] = service
                break
        return res