from django.db.models.fields.related import ForeignKey
from django.shortcuts import get_object_or_404, render, redirect
from django.views.generic import View
from dcim.choices import PortTypeChoices
from dcim.models import Device, Interface, InterfaceTemplate, PowerPort, PowerPortTemplate, ConsolePort, ConsolePortTemplate, ConsoleServerPort, ConsoleServerPortTemplate, DeviceBay, DeviceBayTemplate, FrontPort, FrontPortTemplate,PowerOutlet, PowerOutletTemplate, RearPort, RearPortTemplate
from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin
from django.conf import settings
from django.contrib import messages

from .utils import natural_keys, get_components, post_components
from .comparison import PowerPortComparison, PowerOutletComparison, InterfaceComparison, ConsolePortComparison, ConsoleServerPortComparison, DeviceBayComparison
from .forms import InterfaceComparisonForm

config = settings.PLUGINS_CONFIG['netbox_interface_sync']


class InterfaceComparisonView(LoginRequiredMixin, PermissionRequiredMixin, View):
    """Comparison of interfaces between a device and a device type and beautiful visualization"""
    permission_required = ("dcim.view_interface", "dcim.add_interface", "dcim.change_interface", "dcim.delete_interface")

    def get(self, request, device_id):
        device = get_object_or_404(Device.objects.filter(id=device_id))
        interfaces = device.vc_interfaces()
        if config["exclude_virtual_interfaces"]:
            interfaces = list(filter(lambda i: not i.is_virtual, interfaces))
        interface_templates = InterfaceTemplate.objects.filter(device_type=device.device_type)

        unified_interfaces = [InterfaceComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), i.mgmt_only) for i in interfaces]
        unified_interface_templates = [
            InterfaceComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), i.mgmt_only, is_template=True) for i in interface_templates]

        return get_components(request, device, interfaces, unified_interfaces, unified_interface_templates)

    def post(self, request, device_id):
        form = InterfaceComparisonForm(request.POST)
        if form.is_valid():
            device = get_object_or_404(Device.objects.filter(id=device_id))
            interfaces = device.vc_interfaces()
            if config["exclude_virtual_interfaces"]:
                interfaces = interfaces.exclude(type__in=["virtual", "lag"])
            interface_templates = InterfaceTemplate.objects.filter(device_type=device.device_type)

            # Getting and validating a list of interfaces to rename
            fix_name_components = filter(
                lambda i: str(i.id) in request.POST.getlist("fix_name"), interfaces
            )

            unified_interface_templates = [
                InterfaceComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), i.mgmt_only, is_template=True) for i in interface_templates]
            
            unified_interfaces = []

            for component in fix_name_components:
                    unified_interfaces.append((component, InterfaceComparison(
                        component.id,
                        component.name,
                        component.label,
                        component.description,
                        component.type,
                        component.get_type_display(),
                        component.mgmt_only)))
            
            return post_components(request, device, interfaces, interface_templates, Interface, InterfaceTemplate, unified_interfaces, unified_interface_templates)

class PowerPortComparisonView(LoginRequiredMixin, PermissionRequiredMixin, View):
    """Comparison of interfaces between a device and a device type and beautiful visualization"""
    permission_required = ("dcim.view_interface", "dcim.add_interface", "dcim.change_interface", "dcim.delete_interface")

    def get(self, request, device_id):
        device = get_object_or_404(Device.objects.filter(id=device_id))
        
        powerports = device.powerports.all()
        powerports_templates = PowerPortTemplate.objects.filter(device_type=device.device_type)
        
        unified_powerports = [PowerPortComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), i.maximum_draw, i.allocated_draw) for i in powerports]
        unified_powerport_templates = [
            PowerPortComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), i.maximum_draw, i.allocated_draw, is_template=True) for i in powerports_templates]

        return get_components(request, device, powerports, unified_powerports, unified_powerport_templates)

    def post(self, request, device_id):
        form = InterfaceComparisonForm(request.POST)
        if form.is_valid():
            device = get_object_or_404(Device.objects.filter(id=device_id))

            powerports = device.powerports.all()
            powerports_templates = PowerPortTemplate.objects.filter(device_type=device.device_type)

            # Getting and validating a list of interfaces to rename
            fix_name_components = filter(
                lambda i: str(i.id) in request.POST.getlist("fix_name"), powerports
            )

            unified_powerport_templates = [
                PowerPortComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), i.maximum_draw, i.allocated_draw, is_template=True) for i in powerports_templates]

            unified_powerports = []

            for component in fix_name_components:
                    unified_powerports.append((component, PowerPortComparison(
                        component.id,
                        component.name,
                        component.label,
                        component.description,
                        component.type,
                        component.get_type_display(),
                        component.maximum_draw,
                        component.allocated_draw)))
            
            return post_components(request, device, powerports, powerports_templates, PowerPort, PowerPortTemplate, unified_powerports, unified_powerport_templates)

class ConsolePortComparisonView(LoginRequiredMixin, PermissionRequiredMixin, View):
    """Comparison of interfaces between a device and a device type and beautiful visualization"""
    permission_required = ("dcim.view_interface", "dcim.add_interface", "dcim.change_interface", "dcim.delete_interface")

    def get(self, request, device_id):
        device = get_object_or_404(Device.objects.filter(id=device_id))
        
        consoleports = device.consoleports.all()
        consoleports_templates = ConsolePortTemplate.objects.filter(device_type=device.device_type)

        unified_consoleports = [ConsolePortComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display()) for i in consoleports]
        unified_consoleport_templates = [
            ConsolePortComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), is_template=True) for i in consoleports_templates]

        return get_components(request, device, consoleports, unified_consoleports, unified_consoleport_templates)

    def post(self, request, device_id):
        form = InterfaceComparisonForm(request.POST)
        if form.is_valid():
            device = get_object_or_404(Device.objects.filter(id=device_id))

            consoleports = device.consoleports.all()
            consoleports_templates = ConsolePortTemplate.objects.filter(device_type=device.device_type)

            # Getting and validating a list of interfaces to rename
            fix_name_components = filter(
                lambda i: str(i.id) in request.POST.getlist("fix_name"), consoleports
            )

            unified_consoleport_templates = [
                ConsolePortComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), is_template=True) for i in consoleports_templates]

            unified_consoleports = []

            for component in fix_name_components:
                    unified_consoleports.append((component, ConsolePortComparison(
                        component.id,
                        component.name,
                        component.label,
                        component.description,
                        component.type,
                        component.get_type_display())))
            
            return post_components(request, device, consoleports, consoleports_templates, ConsolePort, ConsolePortTemplate, unified_consoleports, unified_consoleport_templates)

class ConsoleServerPortComparisonView(LoginRequiredMixin, PermissionRequiredMixin, View):
    """Comparison of interfaces between a device and a device type and beautiful visualization"""
    permission_required = ("dcim.view_interface", "dcim.add_interface", "dcim.change_interface", "dcim.delete_interface")

    def get(self, request, device_id):
        device = get_object_or_404(Device.objects.filter(id=device_id))
        
        consoleserverports = device.consoleserverports.all()
        consoleserverports_templates = ConsoleServerPortTemplate.objects.filter(device_type=device.device_type)

        unified_consoleserverports = [ConsoleServerPortComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display()) for i in consoleserverports]
        unified_consoleserverport_templates = [
            ConsoleServerPortComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), is_template=True) for i in consoleserverports_templates]

        return get_components(request, device, consoleserverports, unified_consoleserverports, unified_consoleserverport_templates)

    def post(self, request, device_id):
        form = InterfaceComparisonForm(request.POST)
        if form.is_valid():
            device = get_object_or_404(Device.objects.filter(id=device_id))

            consoleserverports = device.consoleserverports.all()
            consoleserverports_templates = ConsoleServerPortTemplate.objects.filter(device_type=device.device_type)

            # Getting and validating a list of interfaces to rename
            fix_name_components = filter(
                lambda i: str(i.id) in request.POST.getlist("fix_name"), consoleserverports
            )

            unified_consoleserverport_templates = [
                ConsoleServerPortComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), is_template=True) for i in consoleserverports_templates]

            unified_consoleserverports = []

            for component in fix_name_components:
                    unified_consoleserverports.append((component, ConsoleServerPortComparison(
                        component.id,
                        component.name,
                        component.label,
                        component.description,
                        component.type,
                        component.get_type_display())))
            
            return post_components(request, device, consoleserverports, consoleserverports_templates, ConsoleServerPort, ConsoleServerPortTemplate, unified_consoleserverports, unified_consoleserverport_templates)

class PowerOutletComparisonView(LoginRequiredMixin, PermissionRequiredMixin, View):
    """Comparison of interfaces between a device and a device type and beautiful visualization"""
    permission_required = ("dcim.view_interface", "dcim.add_interface", "dcim.change_interface", "dcim.delete_interface")

    def get(self, request, device_id):
        device = get_object_or_404(Device.objects.filter(id=device_id))
        
        poweroutlets = device.poweroutlets.all()
        poweroutlets_templates = PowerOutletTemplate.objects.filter(device_type=device.device_type)
        
        unified_poweroutlets = [PowerOutletComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), power_port_name=PowerPort.objects.get(id=i.power_port_id).name if i.power_port_id is not None else "", feed_leg=i.feed_leg) for i in poweroutlets]
        unified_poweroutlet_templates = [
            PowerOutletComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), power_port_name=PowerPortTemplate.objects.get(id=i.power_port_id).name if i.power_port_id is not None else "", feed_leg=i.feed_leg, is_template=True) for i in poweroutlets_templates]

        return get_components(request, device, poweroutlets, unified_poweroutlets, unified_poweroutlet_templates)

    def post(self, request, device_id):
        form = InterfaceComparisonForm(request.POST)
        if form.is_valid():
            device = get_object_or_404(Device.objects.filter(id=device_id))

            poweroutlets = device.poweroutlets.all()
            poweroutlets_templates = PowerOutletTemplate.objects.filter(device_type=device.device_type)

            # Generating result message
            message = []
            created = 0
            updated = 0
            fixed = 0
            
            remove_from_device = filter(
                lambda i: i in poweroutlets.values_list("id", flat=True),
                map(int, filter(lambda x: x.isdigit(), request.POST.getlist("remove_from_device")))
            )

            # Remove selected interfaces from the device and count them
            deleted = PowerOutlet.objects.filter(id__in=remove_from_device).delete()[0]

            # Get device power ports to check dependency between power outlets
            device_pp = PowerPort.objects.filter(device_id=device.id)

            matching = {}
            mismatch = False
            for i in poweroutlets_templates:
                found = False
                if i.power_port_id is not None:
                    ppt = PowerPortTemplate.objects.get(id=i.power_port_id)
                    for pp in device_pp:
                        if pp.name == ppt.name:
                            # Save matching to add the correct power port later
                            matching[i.id] = pp.id
                            found = True
                    
                    # If at least on power port is found there is a dependency
                    # Better not to sync at all
                    if not found:
                        mismatch = True
                        break
            
            if not mismatch:
                # Manually validating interfaces and interface templates lists                
                add_to_device = filter(
                    lambda i: i in poweroutlets_templates.values_list("id", flat=True),
                    map(int, filter(lambda x: x.isdigit(), request.POST.getlist("add_to_device")))
                )

                # Add selected interfaces to the device and count them
                add_to_device_component = PowerOutletTemplate.objects.filter(id__in=add_to_device)

                bulk_create = []
                updated = 0
                keys_to_avoid = ["id"]

                for i in add_to_device_component.values():
                    to_create = False

                    try:
                        # If power outlets already exists, update and do not recreate
                        po = device.poweroutlets.get(name=i["name"])
                    except PowerOutlet.DoesNotExist:
                        po = PowerOutlet()
                        po.device = device
                        to_create = True

                    # Copy all fields from template
                    for k in i.keys():
                        if k not in keys_to_avoid:
                            setattr(po, k, i[k])
                    po.power_port_id = matching.get(i["id"], None)

                    if to_create:
                        bulk_create.append(po)
                    else:
                        po.save()
                        updated += 1

                created = len(PowerOutlet.objects.bulk_create(bulk_create))

                # Getting and validating a list of interfaces to rename
                fix_name_components = filter(lambda i: str(i.id) in request.POST.getlist("fix_name"), poweroutlets)

                # Casting interface templates into UnifiedInterface objects for proper comparison with interfaces for renaming
                unified_component_templates = [
                    PowerOutletComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), power_port_name=PowerPortTemplate.objects.get(id=i.power_port_id).name if i.power_port_id is not None else "", feed_leg=i.feed_leg, is_template=True) for i in poweroutlets_templates]

                # Rename selected interfaces
                fixed = 0
                for component in fix_name_components:
                    unified_component = [PowerOutletComparison(i.id, i.name, i.label, i.description, i.type, i.get_type_display(), power_port_name=PowerPort.objects.get(id=i.power_port_id).name if i.power_port_id is not None else "", feed_leg=i.feed_leg) for i in poweroutlets]

                    try:
                        # Try to extract an interface template with the corresponding name
                        corresponding_template = unified_component_templates[unified_component_templates.index(unified_component)]
                        component.name = corresponding_template.name
                        component.save()
                        fixed += 1
                    except ValueError:
                        pass
            else:
                message.append("Dependecy detected, sync power ports first!")

            if created > 0:
                message.append(f"created {created} interfaces")
            if updated > 0:
                message.append(f"updated {updated} interfaces")
            if deleted > 0:
                message.append(f"deleted {deleted} interfaces")
            if fixed > 0:
                message.append(f"fixed {fixed} interfaces")

            messages.info(request, "; ".join(message).capitalize())

            return redirect(request.path)

class FrontPortComparisonView(LoginRequiredMixin, PermissionRequiredMixin, View):
    """Comparison of interfaces between a device and a device type and beautiful visualization"""
    permission_required = ("dcim.view_interface", "dcim.add_interface", "dcim.change_interface", "dcim.delete_interface")

    def get(self, request, device_id):
        device = get_object_or_404(Device.objects.filter(id=device_id))
        
        frontports = device.frontports.all()
        frontports_templates = FrontPortTemplate.objects.filter(device_type=device.device_type)

        return get_components(request, device, frontports, frontports_templates)

    def post(self, request, device_id):
        form = InterfaceComparisonForm(request.POST)
        if form.is_valid():
            device = get_object_or_404(Device.objects.filter(id=device_id))

            frontports = device.frontports.all()
            frontports_templates = FrontPortTemplate.objects.filter(device_type=device.device_type)
                
            return post_components(request, device, frontports, frontports_templates, FrontPort, FrontPortTemplate)

class RearPortComparisonView(LoginRequiredMixin, PermissionRequiredMixin, View):
    """Comparison of interfaces between a device and a device type and beautiful visualization"""
    permission_required = ("dcim.view_interface", "dcim.add_interface", "dcim.change_interface", "dcim.delete_interface")

    def get(self, request, device_id):
        device = get_object_or_404(Device.objects.filter(id=device_id))
        
        rearports = device.rearports.all()
        rearports_templates = RearPortTemplate.objects.filter(device_type=device.device_type)

        return get_components(request, device, rearports, rearports_templates)

    def post(self, request, device_id):
        form = InterfaceComparisonForm(request.POST)
        if form.is_valid():
            device = get_object_or_404(Device.objects.filter(id=device_id))

            rearports = device.rearports.all()
            rearports_templates = RearPortTemplate.objects.filter(device_type=device.device_type)
                
            return post_components(request, device, rearports, rearports_templates, RearPort, RearPortTemplate)

class DeviceBayComparisonView(LoginRequiredMixin, PermissionRequiredMixin, View):
    """Comparison of interfaces between a device and a device type and beautiful visualization"""
    permission_required = ("dcim.view_interface", "dcim.add_interface", "dcim.change_interface", "dcim.delete_interface")

    def get(self, request, device_id):
        device = get_object_or_404(Device.objects.filter(id=device_id))
        
        devicebays = device.devicebays.all()
        devicebays_templates = DeviceBayTemplate.objects.filter(device_type=device.device_type)
        
        unified_devicebays = [DeviceBayComparison(i.id, i.name, i.label, i.description) for i in devicebays]
        unified_devicebay_templates = [
            DeviceBayComparison(i.id, i.name, i.label, i.description, is_template=True) for i in devicebays_templates]
            
        return get_components(request, device, devicebays, unified_devicebays, unified_devicebay_templates)

    def post(self, request, device_id):
        form = InterfaceComparisonForm(request.POST)
        if form.is_valid():
            device = get_object_or_404(Device.objects.filter(id=device_id))

            devicebays = device.devicebays.all()
            devicebays_templates = DeviceBayTemplate.objects.filter(device_type=device.device_type)

            # Getting and validating a list of devicebays to rename
            fix_name_components = filter(
                lambda i: str(i.id) in request.POST.getlist("fix_name"), devicebays
            )

            unified_devicebay_templates = [
                DeviceBayComparison(i.id, i.name, i.label, i.description, is_template=True) for i in devicebays_templates]
            
            unified_devicebays = []

            for component in fix_name_components:
                    unified_devicebays.append((component, DeviceBayComparison(
                            component.id,
                            component.name,
                            component.label,
                            component.description
                        )))
                
            return post_components(request, device, devicebays, devicebays_templates, DeviceBay, DeviceBayTemplate, unified_devicebays, unified_devicebay_templates)