2

import logging

from django.http import HttpResponse
from django.urls import include, re_path
from django.utils.translation import gettext_lazy as _

from plugin import InvenTreePlugin
from stock.models import StockItem
from plugin.mixins import AppMixin, NavigationMixin, SettingsMixin, UrlsMixin, ActionMixin, PanelMixin
from stock.views import StockItemDetail


class LoaningManagementPlugin(AppMixin, ActionMixin, SettingsMixin, UrlsMixin, NavigationMixin, PanelMixin, InvenTreePlugin):
    """
    Adds loaning management functionality to InvenTree.
    """

    NAME = "Loan Management"
    SLUG = "loan"
    TITLE = "Loan Management"
    DESCRIPTION = "A plugin to manage loaning and tracking stock"
    VERSION = "0.1"
    AUTHOR = "Joshua Miller, Kyle Wilt @ RPI"

    # Navigation
    NAVIGATION_TAB_NAME = "Loan"
    NAVIGATION_TAB_ICON = 'fas fa-plus'

    NAVIGATION = [
        {'name': 'Loaned Devices', 'link': 'plugin:loan:hi'},
    ]

    # Stock Metadata
    STOCK_KEY_LOANED_STATE = SLUG + "_" + "loaned_state"
    STOCK_KEY_DEFAULTS = {
        STOCK_KEY_LOANED_STATE: False
    }

    # Custom Panels
    STOCK_ITEM_LOAN_PANEL_TITLE = "Loaning"

    def get_custom_panels(self, view, request):
        panels = []

        # Stock Item View
        if isinstance(view, StockItemDetail):
            panels.append({
                "title": LoaningManagementPlugin.STOCK_ITEM_LOAN_PANEL_TITLE,
                "icon": "fas fa-handshake",
                "content_template": "loaningmanagement/loaning_stats_panel.html",
            })

        return panels

    def view_test(self, request):
        """Very basic view."""
        #return HttpResponse(f'Loaned State for stock item 69: {self.get_loaned_state(69)}')
        return HttpResponse('Test!');

    def setup_urls(self):
        """Urls that are exposed by this plugin."""
        he_urls = [
            re_path(r'^he/', self.view_test, name='he'),
            re_path(r'^ha/', self.view_test, name='ha'),
        ]

        return [
            re_path(r'^hi/', self.view_test, name='hi'),
            re_path(r'^ho/', include(he_urls), name='ho'),
        ]

    SETTINGS = {
        'STOCK_LOANED_AUTOMATICALLY': {
            'name': "Stock automatically marked as loanable?",
            'description': "Are stock items ",
            'validator': bool,
            'default': 123,
        }
    }


    # Loaned State - Keeps track if an item is currently loaned or not.
    @staticmethod
    def get_loaned_state(stock_id: int) -> bool:
        """
        Gets the loaned state metadata of Stock Item
        :param stock_id:
        :return:
        """
        # Get loaned state
        loaned_state = StockItem.objects.get(pk=stock_id).get_metadata(LoaningManagementPlugin.STOCK_KEY_LOANED_STATE)

        # Enforce a loaned state for the part
        if loaned_state is None:
            print("Part with id: {0} does not have a loaned state, setting to default".format(stock_id))
            loaned_state = LoaningManagementPlugin.set_loaned_state(stock_id)

        # Enforce that the loaned state is a boolean
        if not isinstance(loaned_state, bool):
            raise TypeError("Loaned item metadata is not of type Bool. Did another plugin edit the metadata?")

        return loaned_state

    @staticmethod
    def set_loaned_state(stock_id: int, state: bool = STOCK_KEY_DEFAULTS[STOCK_KEY_LOANED_STATE]) -> bool:
        """
        Sets the loaned state metadata of Stock Item
        :param state: The state to set the stock item to
        :param stock_id:
        :return: value of state that was set
        """

        stock_item: StockItem = StockItem.objects.get(pk=stock_id)  # Get stock item
        stock_item.set_metadata(LoaningManagementPlugin.STOCK_KEY_LOANED_STATE, state)  # Set state metadata

        return state