import logging
from typing import Any, List, Optional

import sqlalchemy.exc
from flask import (
    Blueprint,
    Response,
    current_app,
    flash,
    redirect,
    render_template,
    url_for,
)
from flask.typing import ResponseReturnValue
from flask_wtf import FlaskForm
from sqlalchemy import exc
from wtforms import BooleanField, FileField, SelectField, StringField, SubmitField
from wtforms.validators import DataRequired

from app.brm.static import create_static_origin
from app.models.base import Group
from app.models.cloud import CloudAccount, CloudProvider
from app.models.mirrors import Origin, StaticOrigin
from app.portal.util import response_404, view_lifecycle

bp = Blueprint("static", __name__)


class StaticOriginForm(FlaskForm):  # type: ignore
    description = StringField(
        "Description",
        validators=[DataRequired()],
        description="Enter a brief description of the static website that you are creating in this field. This is "
        "also a required field.",
    )
    group = SelectField(
        "Group",
        validators=[DataRequired()],
        description="Select the group that you want the origin to belong to from the drop-down menu in this field. "
        "This is a required field.",
    )
    storage_cloud_account = SelectField(
        "Storage Cloud Account",
        validators=[DataRequired()],
        description="Select the cloud account that you want the origin to be deployed to from the drop-down menu in "
        "this field. This is a required field.",
    )
    source_cloud_account = SelectField(
        "Source Cloud Account",
        validators=[DataRequired()],
        description="Select the cloud account that will be used to modify the source repository for the web content "
        "for this static origin. This is a required field.",
    )
    source_project = StringField(
        "Source Project",
        validators=[DataRequired()],
        description="GitLab project path.",
    )
    auto_rotate = BooleanField(
        "Auto-Rotate",
        default=True,
        description="Select this field if you want to enable auto-rotation for the mirror. This means that the mirror "
        "will automatically redeploy with a new domain name if it is detected to be blocked. This field "
        "is optional and is enabled by default.",
    )
    matrix_homeserver = SelectField(
        "Matrix Homeserver",
        description="Select the Matrix homeserver from the drop-down box to enable Keanu Convene on mirrors of this "
        "static origin.",
    )
    keanu_convene_path = StringField(
        "Keanu Convene Path",
        default="talk",
        description="Enter the subdirectory to present the Keanu Convene application at on the mirror. This defaults "
        'to "talk".',
    )
    keanu_convene_logo = FileField(
        "Keanu Convene Logo", description="Logo to use for Keanu Convene"
    )
    keanu_convene_color = StringField(
        "Keanu Convene Accent Color",
        default="#0047ab",
        description="Accent color to use for Keanu Convene (HTML hex code)",
    )
    enable_clean_insights = BooleanField(
        "Enable Clean Insights",
        description="When enabled, a Clean Insights Measurement Proxy endpoint is deployed on the mirror to allow for "
        "submission of results from any of the supported Clean Insights SDKs.",
    )
    submit = SubmitField("Save Changes")

    def __init__(self, *args: Any, **kwargs: Any) -> None:
        super().__init__(*args, **kwargs)
        self.group.choices = [(x.id, x.group_name) for x in Group.query.all()]
        self.storage_cloud_account.choices = [
            (x.id, f"{x.provider.description} - {x.description}")
            for x in CloudAccount.query.filter(
                CloudAccount.provider == CloudProvider.AWS
            ).all()
        ]
        self.source_cloud_account.choices = [
            (x.id, f"{x.provider.description} - {x.description}")
            for x in CloudAccount.query.filter(
                CloudAccount.provider == CloudProvider.GITLAB
            ).all()
        ]
        self.matrix_homeserver.choices = [
            (x, x) for x in current_app.config["MATRIX_HOMESERVERS"]
        ]


@bp.route("/new", methods=["GET", "POST"])
@bp.route("/new/<group_id>", methods=["GET", "POST"])
def static_new(group_id: Optional[int] = None) -> ResponseReturnValue:
    form = StaticOriginForm()
    if (
        len(form.source_cloud_account.choices) == 0
        or len(form.storage_cloud_account.choices) == 0
    ):
        flash(
            "You must add at least one AWS account and at least one GitLab account before creating static origins.",
            "warning",
        )
        return redirect(url_for("portal.cloud.cloud_account_list"))
    if form.validate_on_submit():
        try:
            static = create_static_origin(
                form.description.data,
                int(form.group.data),
                int(form.storage_cloud_account.data),
                int(form.source_cloud_account.data),
                form.source_project.data,
                form.auto_rotate.data,
                form.matrix_homeserver.data,
                form.keanu_convene_path.data,
                form.keanu_convene_logo.data,
                form.keanu_convene_color.data,
                form.enable_clean_insights.data,
                True,
            )
            flash(f"Created new static origin #{static.id}.", "success")
            return redirect(url_for("portal.static.static_edit", static_id=static.id))
        except (
            ValueError
        ) as e:  # may be returned by create_static_origin and from the int conversion
            logging.warning(e)
            flash(
                "Failed to create new static origin due to an invalid input.", "danger"
            )
            return redirect(url_for("portal.static.static_list"))
        except exc.SQLAlchemyError as e:
            flash(
                "Failed to create new static origin due to a database error.", "danger"
            )
            logging.warning(e)
            return redirect(url_for("portal.static.static_list"))
    if group_id:
        form.group.data = group_id
    return render_template("new.html.j2", section="static", form=form)


@bp.route("/edit/<static_id>", methods=["GET", "POST"])
def static_edit(static_id: int) -> ResponseReturnValue:
    static_origin: Optional[StaticOrigin] = StaticOrigin.query.filter(
        StaticOrigin.id == static_id
    ).first()
    if static_origin is None:
        return Response(
            render_template(
                "error.html.j2",
                section="static",
                header="404 Origin Not Found",
                message="The requested static origin could not be found.",
            ),
            status=404,
        )
    form = StaticOriginForm(
        description=static_origin.description,
        group=static_origin.group_id,
        storage_cloud_account=static_origin.storage_cloud_account_id,
        source_cloud_account=static_origin.source_cloud_account_id,
        source_project=static_origin.source_project,
        matrix_homeserver=static_origin.matrix_homeserver,
        keanu_convene_path=static_origin.keanu_convene_path,
        auto_rotate=static_origin.auto_rotate,
        enable_clean_insights=bool(static_origin.clean_insights_backend),
    )
    form.group.render_kw = {"disabled": ""}
    form.storage_cloud_account.render_kw = {"disabled": ""}
    form.source_cloud_account.render_kw = {"disabled": ""}
    if form.validate_on_submit():
        try:
            static_origin.update(
                form.source_project.data,
                form.description.data,
                form.auto_rotate.data,
                form.matrix_homeserver.data,
                form.keanu_convene_path.data,
                form.keanu_convene_logo.data,
                form.keanu_convene_color.data,
                form.enable_clean_insights.data,
                True,
            )
            flash("Saved changes to group.", "success")
        except (
            ValueError
        ) as e:  # may be returned by create_static_origin and from the int conversion
            logging.warning(e)
            flash(
                "An error occurred saving the changes to the static origin due to an invalid input.",
                "danger",
            )
        except exc.SQLAlchemyError as e:
            logging.warning(e)
            flash(
                "An error occurred saving the changes to the static origin due to a database error.",
                "danger",
            )
    try:
        origin = Origin.query.filter_by(
            domain_name=static_origin.origin_domain_name
        ).one()
        proxies = origin.proxies
    except sqlalchemy.exc.NoResultFound:
        proxies = []
    return render_template(
        "static.html.j2",
        section="static",
        static=static_origin,
        form=form,
        proxies=proxies,
    )


@bp.route("/list")
def static_list() -> ResponseReturnValue:
    statics: List[StaticOrigin] = StaticOrigin.query.order_by(
        StaticOrigin.description
    ).all()
    return render_template(
        "list.html.j2",
        section="static",
        title="Static Origins",
        item="static",
        new_link=url_for("portal.static.static_new"),
        items=statics,
    )


@bp.route("/destroy/<static_id>", methods=["GET", "POST"])
def static_destroy(static_id: int) -> ResponseReturnValue:
    static = StaticOrigin.query.filter(
        StaticOrigin.id == static_id, StaticOrigin.destroyed.is_(None)
    ).first()
    if static is None:
        return response_404("The requested static origin could not be found.")
    return view_lifecycle(
        header=f"Destroy static origin {static.description}",
        message=static.description,
        success_message="All proxies from the destroyed static origin will shortly be destroyed at their providers, "
        "and the static content will be removed from the cloud provider.",
        success_view="portal.static.static_list",
        section="static",
        resource=static,
        action="destroy",
    )