# Copyright (C) 2012-2024 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/

import deform
import logging
import peppercorn

from pyramid.httpexceptions import HTTPFound, HTTPForbidden, HTTPNotFound

from rhodecode.integrations import integration_type_registry
from rhodecode.apps._base import BaseAppView
from rhodecode.apps._base.navigation import navigation_list
from rhodecode.lib.auth import (
    LoginRequired,
    CSRFRequired,
    HasPermissionAnyDecorator,
    HasRepoPermissionAnyDecorator,
    HasRepoGroupPermissionAnyDecorator,
)
from rhodecode.lib.utils2 import safe_int
from rhodecode.lib.helpers import Page
from rhodecode.lib import helpers as h
from rhodecode.model.db import Repository, RepoGroup, Session, Integration
from rhodecode.model.scm import ScmModel
from rhodecode.model.integration import IntegrationModel
from rhodecode.model.validation_schema.schemas.integration_schema import make_integration_schema, IntegrationScopeType

log = logging.getLogger(__name__)


class IntegrationSettingsViewBase(BaseAppView):
    """
    Base Integration settings view used by both repo / global settings
    """

    def __init__(self, context, request):
        super().__init__(context, request)
        self._load_view_context()

    def _load_view_context(self):
        """
        This avoids boilerplate for repo/global+list/edit+views/templates
        by doing all possible contexts at the same time however it should
        be split up into separate functions once more "contexts" exist
        """

        self.IntegrationType = None
        self.repo = None
        self.repo_group = None
        self.integration = None
        self.integrations = {}

        request = self.request

        if "repo_name" in request.matchdict:  # in repo settings context
            repo_name = request.matchdict["repo_name"]
            self.repo = Repository.get_by_repo_name(repo_name)

        if "repo_group_name" in request.matchdict:  # in group settings context
            repo_group_name = request.matchdict["repo_group_name"]
            self.repo_group = RepoGroup.get_by_group_name(repo_group_name)

        if "integration" in request.matchdict:  # integration type context
            integration_type = request.matchdict["integration"]
            if integration_type not in integration_type_registry:
                raise HTTPNotFound()

            self.IntegrationType = integration_type_registry[integration_type]
            if self.IntegrationType.is_dummy:
                raise HTTPNotFound()

        if "integration_id" in request.matchdict:  # single integration context
            integration_id = request.matchdict["integration_id"]
            self.integration = Integration.get(integration_id)

            # extra perms check just in case
            if not self._has_perms_for_integration(self.integration):
                raise HTTPForbidden()

        self.settings = self.integration and self.integration.settings or {}
        self.admin_view = not (self.repo or self.repo_group)

    def _has_perms_for_integration(self, integration):
        perms = self.request.user.permissions

        if "hg.admin" in perms["global"]:
            return True

        if integration.repo:
            return perms["repositories"].get(integration.repo.repo_name) == "repository.admin"

        if integration.repo_group:
            return perms["repositories_groups"].get(integration.repo_group.group_name) == "group.admin"

        return False

    def _get_local_tmpl_context(self, include_app_defaults=True):
        _ = self.request.translate
        c = super()._get_local_tmpl_context(include_app_defaults=include_app_defaults)
        c.active = "integrations"

        return c

    def _form_schema(self):
        schema = make_integration_schema(IntegrationType=self.IntegrationType, settings=self.settings)

        # returns a clone, important if mutating the schema later
        return schema.bind(permissions=self.request.user.permissions, no_scope=not self.admin_view)

    def _form_defaults(self):
        _ = self.request.translate
        defaults = {}

        if self.integration:
            defaults["settings"] = self.integration.settings or {}
            defaults["options"] = {
                "name": self.integration.name,
                "enabled": self.integration.enabled,
                "scope": {
                    "repo": self.integration.repo,
                    "repo_group": self.integration.repo_group,
                    "child_repos_only": self.integration.child_repos_only,
                },
            }
        else:
            if self.repo:
                scope = _("{repo_name} repository").format(repo_name=self.repo.repo_name)
            elif self.repo_group:
                scope = _("{repo_group_name} repo group").format(repo_group_name=self.repo_group.group_name)
            else:
                scope = _("Global")

            defaults["options"] = {
                "enabled": True,
                "name": _("{name} integration").format(name=self.IntegrationType.display_name),
            }
            defaults["options"]["scope"] = {
                "repo": self.repo,
                "repo_group": self.repo_group,
            }

        return defaults

    def _delete_integration(self, integration):
        _ = self.request.translate
        Session().delete(integration)
        Session().commit()
        h.flash(
            _("Integration {integration_name} deleted successfully.").format(integration_name=integration.name),
            category="success",
        )

        if self.repo:
            redirect_to = self.request.route_path("repo_integrations_home", repo_name=self.repo.repo_name)
        elif self.repo_group:
            redirect_to = self.request.route_path(
                "repo_group_integrations_home", repo_group_name=self.repo_group.group_name
            )
        else:
            redirect_to = self.request.route_path("global_integrations_home")
        raise HTTPFound(redirect_to)

    def _integration_list(self):
        """List integrations"""

        c = self.load_default_context()
        if self.repo:
            scope = self.repo
        elif self.repo_group:
            scope = self.repo_group
        else:
            scope = "all"

        integrations = []

        for IntType, integration in IntegrationModel().get_integrations(
            scope=scope, IntegrationType=self.IntegrationType
        ):
            # extra permissions check *just in case*
            if not self._has_perms_for_integration(integration):
                continue

            integrations.append((IntType, integration))

        sort_arg = self.request.GET.get("sort", "name:asc")
        sort_dir = "asc"
        if ":" in sort_arg:
            sort_field, sort_dir = sort_arg.split(":")
        else:
            sort_field = sort_arg, "asc"

        assert sort_field in ("name", "integration_type", "enabled", "scope")

        integrations.sort(key=lambda x: getattr(x[1], sort_field), reverse=(sort_dir == "desc"))

        def url_generator(page_num):
            query_params = {"page": page_num}
            return self.request.current_route_path(_query=query_params)

        page = safe_int(self.request.GET.get("page", 1), 1)

        integrations = Page(integrations, page=page, items_per_page=10, url_maker=url_generator)

        c.rev_sort_dir = sort_dir != "desc" and "desc" or "asc"

        c.current_IntegrationType = self.IntegrationType
        c.integrations_list = integrations
        c.available_integrations = integration_type_registry

        return self._get_template_context(c)

    def _settings_get(self, defaults=None, form=None):
        """
        View that displays the integration settings as a form.
        """
        c = self.load_default_context()

        defaults = defaults or self._form_defaults()
        schema = self._form_schema()

        if self.integration:
            buttons = ("submit", "delete")
        else:
            buttons = ("submit",)

        form = form or deform.Form(schema, appstruct=defaults, buttons=buttons)

        c.form = form
        c.current_IntegrationType = self.IntegrationType
        c.integration = self.integration

        return self._get_template_context(c)

    def _settings_post(self):
        """
        View that validates and stores the integration settings.
        """
        _ = self.request.translate

        controls = list(self.request.POST.items())
        pstruct = peppercorn.parse(controls)

        if self.integration and pstruct.get("delete"):
            return self._delete_integration(self.integration)

        schema = self._form_schema()

        skip_settings_validation = False
        if self.integration and "enabled" not in pstruct.get("options", {}):
            skip_settings_validation = True
            schema["settings"].validator = None
            for field in schema["settings"].children:
                field.validator = None
                field.missing = ""

        if self.integration:
            buttons = ("submit", "delete")
        else:
            buttons = ("submit",)

        form = deform.Form(schema, buttons=buttons)

        if not self.admin_view:
            # scope is read only field in these cases, and has to be added
            options = pstruct.setdefault("options", {})
            if "scope" not in options:
                options["scope"] = IntegrationScopeType().serialize(
                    None,
                    {
                        "repo": self.repo,
                        "repo_group": self.repo_group,
                    },
                )

        try:
            valid_data = form.validate_pstruct(pstruct)
        except deform.ValidationFailure as e:
            h.flash(_("Errors exist when saving integration settings. Please check the form inputs."), category="error")
            return self._settings_get(form=e)

        if not self.integration:
            self.integration = Integration()
            self.integration.integration_type = self.IntegrationType.key
            Session().add(self.integration)

        scope = valid_data["options"]["scope"]

        IntegrationModel().update_integration(
            self.integration,
            name=valid_data["options"]["name"],
            enabled=valid_data["options"]["enabled"],
            settings=valid_data["settings"],
            repo=scope["repo"],
            repo_group=scope["repo_group"],
            child_repos_only=scope["child_repos_only"],
        )

        self.integration.settings = valid_data["settings"]
        Session().commit()
        # Display success message and redirect.
        h.flash(
            _("Integration {integration_name} updated successfully.").format(
                integration_name=self.IntegrationType.display_name
            ),
            category="success",
        )

        # if integration scope changes, we must redirect to the right place
        # keeping in mind if the original view was for /repo/ or /_admin/
        admin_view = not (self.repo or self.repo_group)

        if self.integration.repo and not admin_view:
            redirect_to = self.request.route_path(
                "repo_integrations_edit",
                repo_name=self.integration.repo.repo_name,
                integration=self.integration.integration_type,
                integration_id=self.integration.integration_id,
            )
        elif self.integration.repo_group and not admin_view:
            redirect_to = self.request.route_path(
                "repo_group_integrations_edit",
                repo_group_name=self.integration.repo_group.group_name,
                integration=self.integration.integration_type,
                integration_id=self.integration.integration_id,
            )
        else:
            redirect_to = self.request.route_path(
                "global_integrations_edit",
                integration=self.integration.integration_type,
                integration_id=self.integration.integration_id,
            )

        return HTTPFound(redirect_to)

    def _new_integration(self):
        c = self.load_default_context()
        c.available_integrations = integration_type_registry
        return self._get_template_context(c)

    def load_default_context(self):
        raise NotImplementedError()


class GlobalIntegrationsView(IntegrationSettingsViewBase):
    def load_default_context(self):
        c = self._get_local_tmpl_context()
        c.repo = self.repo
        c.repo_group = self.repo_group
        c.navlist = navigation_list(self.request)

        return c

    @LoginRequired()
    @HasPermissionAnyDecorator("hg.admin")
    def integration_list(self):
        return self._integration_list()

    @LoginRequired()
    @HasPermissionAnyDecorator("hg.admin")
    def settings_get(self):
        return self._settings_get()

    @LoginRequired()
    @HasPermissionAnyDecorator("hg.admin")
    @CSRFRequired()
    def settings_post(self):
        return self._settings_post()

    @LoginRequired()
    @HasPermissionAnyDecorator("hg.admin")
    def new_integration(self):
        return self._new_integration()


class RepoIntegrationsView(IntegrationSettingsViewBase):
    def load_default_context(self):
        c = self._get_local_tmpl_context()

        c.repo = self.repo
        c.repo_group = self.repo_group

        self.db_repo = self.repo
        c.rhodecode_db_repo = self.repo
        c.repo_name = self.db_repo.repo_name
        c.repository_pull_requests = ScmModel().get_pull_requests(self.repo)
        c.repository_artifacts = ScmModel().get_artifacts(self.repo)
        c.repository_is_user_following = ScmModel().is_following_repo(c.repo_name, self._rhodecode_user.user_id)
        c.has_origin_repo_read_perm = False
        if self.db_repo.fork:
            c.has_origin_repo_read_perm = h.HasRepoPermissionAny(
                "repository.write", "repository.read", "repository.admin"
            )(self.db_repo.fork.repo_name, "summary fork link")
        return c

    @LoginRequired()
    @HasRepoPermissionAnyDecorator("repository.admin")
    def integration_list(self):
        return self._integration_list()

    @LoginRequired()
    @HasRepoPermissionAnyDecorator("repository.admin")
    def settings_get(self):
        return self._settings_get()

    @LoginRequired()
    @HasRepoPermissionAnyDecorator("repository.admin")
    @CSRFRequired()
    def settings_post(self):
        return self._settings_post()

    @LoginRequired()
    @HasRepoPermissionAnyDecorator("repository.admin")
    def new_integration(self):
        return self._new_integration()


class RepoGroupIntegrationsView(IntegrationSettingsViewBase):
    def load_default_context(self):
        c = self._get_local_tmpl_context()
        c.repo = self.repo
        c.repo_group = self.repo_group
        c.navlist = navigation_list(self.request)

        return c

    @LoginRequired()
    @HasRepoGroupPermissionAnyDecorator("group.admin")
    def integration_list(self):
        return self._integration_list()

    @LoginRequired()
    @HasRepoGroupPermissionAnyDecorator("group.admin")
    def settings_get(self):
        return self._settings_get()

    @LoginRequired()
    @HasRepoGroupPermissionAnyDecorator("group.admin")
    @CSRFRequired()
    def settings_post(self):
        return self._settings_post()

    @LoginRequired()
    @HasRepoGroupPermissionAnyDecorator("group.admin")
    def new_integration(self):
        return self._new_integration()
