from openflexure_microscope.api.utilities import parse_payload, get_from_payload, gen, get_bool
from openflexure_microscope.api.v1.views import MicroscopeViewPlugin

from flask import Response, Blueprint, jsonify

import logging, warnings


def construct_blueprint(microscope_obj, plugin_paths=[], include_default=True):

    blueprint = Blueprint('plugin_blueprint', __name__)

    all_routes = []

    # For each plugin attached to the microscope object
    for plugin_name, plugin_obj in microscope_obj.plugin.plugins:

        if hasattr(plugin_obj, 'api_views') and isinstance(plugin_obj.api_views, dict):  # If plugin contains valid endpoints

            for view_route, view_class in plugin_obj.api_views.items():  # For each defined endpoint

                # Remove all leading slashes from view route
                while view_route[0] == '/':
                    view_route = view_route[1:]

                # Construct a full view route from the plugin name
                full_view_route = "/{}/{}".format(plugin_name, view_route)

                if full_view_route not in all_routes and issubclass(view_class, MicroscopeViewPlugin):  # Check if endpoint name clashes
                    all_routes.append(full_view_route)  # Add route to main route dictionary

                    # Add route to the plugins blueprint
                    blueprint.add_url_rule(
                        full_view_route,
                        view_func=view_class.as_view('plugin_{}'.format(view_route).replace('/', '_'), microscope=microscope_obj, plugin=plugin_obj)
                    )

                else:
                    warnings.warn("An endpoint /{} has already been loaded. Skipping {}.".format(full_view_route, view_class))

        else:
            warnings.warn("No valid 'api_views' dictionary found in {}".format(plugin_obj))

    return(blueprint)