import { PermissionAction } from '@supabase/shared-types/out/constants'
import { useTheme } from 'next-themes'
import Link from 'next/link'
import { useEffect, useState } from 'react'
import { toast } from 'sonner'

import { useParams } from 'common'
import { subscriptionHasHipaaAddon } from 'components/interfaces/Billing/Subscription/Subscription.utils'
import { useReadReplicasQuery } from 'data/read-replicas/replicas-query'
import { useOrgSubscriptionQuery } from 'data/subscriptions/org-subscription-query'
import { useProjectAddonRemoveMutation } from 'data/subscriptions/project-addon-remove-mutation'
import { useProjectAddonUpdateMutation } from 'data/subscriptions/project-addon-update-mutation'
import { useProjectAddonsQuery } from 'data/subscriptions/project-addons-query'
import type { AddonVariantId } from 'data/subscriptions/types'
import { useCheckPermissions } from 'hooks/misc/useCheckPermissions'
import { useSelectedOrganization } from 'hooks/misc/useSelectedOrganization'
import { useSelectedProject } from 'hooks/misc/useSelectedProject'
import { BASE_PATH } from 'lib/constants'
import { formatCurrency } from 'lib/helpers'
import { useAddonsPagePanel } from 'state/addons-page'
import {
  Alert,
  AlertDescription_Shadcn_,
  AlertTitle_Shadcn_,
  Alert_Shadcn_,
  Button,
  CriticalIcon,
  Radio,
  SidePanel,
  WarningIcon,
  cn,
} from 'ui'
import { ExternalLink, AlertTriangle } from 'lucide-react'

const PITR_CATEGORY_OPTIONS: {
  id: 'off' | 'on'
  name: string
  imageUrl: string
  imageUrlLight: string
}[] = [
  {
    id: 'off',
    name: 'Disable PITR',
    imageUrl: `${BASE_PATH}/img/pitr-off.svg?v=2`,
    imageUrlLight: `${BASE_PATH}/img/pitr-off--light.svg?v=2`,
  },
  {
    id: 'on',
    name: 'Enable PITR',
    imageUrl: `${BASE_PATH}/img/pitr-on.svg?v=2`,
    imageUrlLight: `${BASE_PATH}/img/pitr-on--light.svg?v=2`,
  },
]

const PITRSidePanel = () => {
  const { ref: projectRef } = useParams()
  const { resolvedTheme } = useTheme()
  const project = useSelectedProject()
  const organization = useSelectedOrganization()

  const [selectedCategory, setSelectedCategory] = useState<'on' | 'off'>('off')
  const [selectedOption, setSelectedOption] = useState<string>('pitr_0')

  const canUpdatePitr = useCheckPermissions(PermissionAction.BILLING_WRITE, 'stripe.subscriptions')
  const isBranchingEnabled =
    project?.is_branch_enabled === true || project?.parent_project_ref !== undefined

  const { panel, setPanel, closePanel } = useAddonsPagePanel()
  const visible = panel === 'pitr'

  const { data: databases } = useReadReplicasQuery({ projectRef })
  const { data: addons, isLoading } = useProjectAddonsQuery({ projectRef })
  const { data: subscription } = useOrgSubscriptionQuery({ orgSlug: organization?.slug })
  const hasHipaaAddon = subscriptionHasHipaaAddon(subscription)

  const { mutate: updateAddon, isLoading: isUpdating } = useProjectAddonUpdateMutation({
    onSuccess: () => {
      toast.success(`Successfully updated point in time recovery duration`)
      closePanel()
    },
    onError: (error) => {
      toast.error(`Unable to update PITR: ${error.message}`)
    },
  })
  const { mutate: removeAddon, isLoading: isRemoving } = useProjectAddonRemoveMutation({
    onSuccess: () => {
      toast.success(`Successfully disabled point in time recovery`)
      closePanel()
    },
    onError: (error) => {
      toast.error(`Unable to disable PITR: ${error.message}`)
    },
  })
  const isSubmitting = isUpdating || isRemoving

  const selectedAddons = addons?.selected_addons ?? []
  const availableAddons = addons?.available_addons ?? []

  const subscriptionCompute = selectedAddons.find((addon) => addon.type === 'compute_instance')
  const subscriptionPitr = selectedAddons.find((addon) => addon.type === 'pitr')
  const availableOptions = availableAddons.find((addon) => addon.type === 'pitr')?.variants ?? []

  const hasReadReplicas = (databases ?? []).length > 1
  const hasChanges = selectedOption !== (subscriptionPitr?.variant.identifier ?? 'pitr_0')
  const selectedPitr = availableOptions.find((option) => option.identifier === selectedOption)
  const isFreePlan = subscription?.plan?.id === 'free'
  const blockDowngradeDueToReadReplicas =
    hasChanges && hasReadReplicas && selectedCategory === 'off' && selectedOption === 'pitr_0'

  useEffect(() => {
    if (visible) {
      if (subscriptionPitr !== undefined) {
        setSelectedCategory('on')
        setSelectedOption(subscriptionPitr.variant.identifier)
      } else {
        setSelectedCategory('off')
        setSelectedOption('pitr_0')
      }
    }
  }, [visible, isLoading])

  const onConfirm = async () => {
    if (!projectRef) return console.error('Project ref is required')

    if (selectedOption === 'pitr_0' && subscriptionPitr !== undefined) {
      removeAddon({ projectRef, variant: subscriptionPitr.variant.identifier })
    } else {
      updateAddon({ projectRef, type: 'pitr', variant: selectedOption as AddonVariantId })
    }
  }

  return (
    <SidePanel
      size="xlarge"
      visible={visible}
      onCancel={closePanel}
      onConfirm={onConfirm}
      loading={isLoading || isSubmitting}
      disabled={
        isFreePlan ||
        isLoading ||
        !hasChanges ||
        isSubmitting ||
        !canUpdatePitr ||
        hasHipaaAddon ||
        blockDowngradeDueToReadReplicas
      }
      tooltip={
        hasHipaaAddon
          ? 'Unable to change PITR with HIPAA add-on'
          : isFreePlan
            ? 'Unable to enable point in time recovery on a Free Plan'
            : !canUpdatePitr
              ? 'You do not have permission to update PITR'
              : undefined
      }
      header={
        <div className="flex items-center justify-between">
          <h4>Point in Time Recovery</h4>
          <Button asChild type="default" icon={<ExternalLink strokeWidth={1.5} />}>
            <Link
              href="https://supabase.com/docs/guides/platform/backups#point-in-time-recovery"
              target="_blank"
              rel="noreferrer"
            >
              About point in time recovery
            </Link>
          </Button>
        </div>
      }
    >
      <SidePanel.Content>
        {hasHipaaAddon && (
          <Alert_Shadcn_>
            <AlertTitle_Shadcn_>PITR cannot be changed with HIPAA</AlertTitle_Shadcn_>
            <AlertDescription_Shadcn_>
              All projects should have PITR enabled by default and cannot be changed with HIPAA
              enabled. Contact support for further assistance.
            </AlertDescription_Shadcn_>
            <div className="mt-4">
              <Button type="default" asChild>
                <Link href="/support/new">Contact support</Link>
              </Button>
            </div>
          </Alert_Shadcn_>
        )}
        <div className="py-6 space-y-4">
          <p className="text-sm">
            Point-in-Time Recovery (PITR) allows a project to be backed up at much shorter
            intervals. This provides users an option to restore to any chosen point of up to seconds
            in granularity.
          </p>

          <div className="!mt-8 pb-4">
            <div className="flex gap-3">
              {PITR_CATEGORY_OPTIONS.map((option) => {
                const isSelected = selectedCategory === option.id
                return (
                  <div
                    key={option.id}
                    className={cn('col-span-3 group space-y-1', isFreePlan && 'opacity-75')}
                    onClick={() => {
                      setSelectedCategory(option.id)
                      if (option.id === 'off') {
                        setSelectedOption('pitr_0')
                      } else if (subscriptionPitr?.variant.identifier !== undefined) {
                        setSelectedOption(subscriptionPitr.variant.identifier)
                      } else {
                        setSelectedOption('pitr_7')
                      }
                    }}
                  >
                    <img
                      alt="Point-In-Time-Recovery"
                      className={cn(
                        'relative rounded-xl transition border bg-no-repeat bg-center bg-cover cursor-pointer w-[160px] h-[96px]',
                        isSelected
                          ? 'border-foreground'
                          : 'border-foreground-muted opacity-50 group-hover:border-foreground-lighter group-hover:opacity-100'
                      )}
                      width={160}
                      height={96}
                      src={resolvedTheme?.includes('dark') ? option.imageUrl : option.imageUrlLight}
                    />

                    <p
                      className={cn(
                        'text-sm transition',
                        isSelected ? 'text-foreground' : 'text-foreground-light'
                      )}
                    >
                      {option.name}
                    </p>
                  </div>
                )
              })}
            </div>
          </div>

          {selectedCategory === 'off' && subscriptionPitr !== undefined && isBranchingEnabled && (
            <Alert_Shadcn_ variant="warning">
              <CriticalIcon />
              <AlertTitle_Shadcn_>
                Are you sure you want to disable this while using Branching?
              </AlertTitle_Shadcn_>
              <AlertDescription_Shadcn_>
                Without PITR, you might not be able to recover lost data if you accidentally merge a
                branch that deletes a column or user data. We don't recommend this.
              </AlertDescription_Shadcn_>
            </Alert_Shadcn_>
          )}

          {blockDowngradeDueToReadReplicas && (
            <Alert_Shadcn_>
              <WarningIcon />
              <AlertTitle_Shadcn_>Remove all read replicas before downgrading</AlertTitle_Shadcn_>
              <AlertDescription_Shadcn_>
                You currently have active read replicas. The minimum compute size for using read
                replicas is the Small Compute. You need to remove all read replicas before
                downgrading Compute as it requires at least a Small compute instance.
              </AlertDescription_Shadcn_>
              <AlertDescription_Shadcn_ className="mt-2">
                <Button asChild type="default">
                  <Link href={`/project/${projectRef}/settings/infrastructure`}>
                    Manage read replicas
                  </Link>
                </Button>
              </AlertDescription_Shadcn_>
            </Alert_Shadcn_>
          )}

          {selectedCategory === 'on' && (
            <div className="!mt-8 pb-4">
              {isFreePlan ? (
                <Alert
                  withIcon
                  variant="info"
                  className="mb-4"
                  title="Changing your Point-In-Time-Recovery is only available on the Pro Plan"
                  actions={
                    <Button asChild type="default">
                      <Link href={`/org/${organization?.slug}/billing?panel=subscriptionPlan`}>
                        View available plans
                      </Link>
                    </Button>
                  }
                >
                  Upgrade your plan to change PITR for your project
                </Alert>
              ) : subscriptionCompute === undefined ? (
                <Alert
                  withIcon
                  variant="warning"
                  className="mb-4"
                  title="Your project is required to minimally be on a Small compute size to enable PITR"
                  actions={[
                    <Button
                      key="change-compute"
                      type="default"
                      onClick={() => setPanel('computeInstance')}
                    >
                      Change compute size
                    </Button>,
                  ]}
                >
                  This is to ensure that your project has enough resources to execute PITR
                  successfully
                </Alert>
              ) : null}

              <Radio.Group
                type="large-cards"
                size="tiny"
                id="pitr"
                label={<p className="text-sm">Choose the duration of recovery</p>}
                onChange={(event: any) => setSelectedOption(event.target.value)}
              >
                {availableOptions.map((option) => (
                  <Radio
                    name="pitr"
                    disabled={isFreePlan || subscriptionCompute === undefined}
                    className="col-span-4 !p-0"
                    key={option.identifier}
                    checked={selectedOption === option.identifier}
                    label={<span className="text-sm">{option.name}</span>}
                    value={option.identifier}
                  >
                    <div className="w-full group">
                      <div className="border-b border-default px-4 py-2">
                        <p className="text-sm">{option.name}</p>
                      </div>
                      <div className="px-4 py-2">
                        <p className="text-foreground-light">
                          Allow database restorations to any time up to{' '}
                          {option.identifier.split('_')[1]} days ago
                        </p>
                        <div className="flex items-center space-x-1 mt-2">
                          <p className="text-foreground text-sm">{formatCurrency(option.price)}</p>
                          <p className="text-foreground-light translate-y-[1px]"> / month</p>
                        </div>
                      </div>
                    </div>
                  </Radio>
                ))}
              </Radio.Group>
            </div>
          )}

          {hasChanges && !blockDowngradeDueToReadReplicas && (
            <>
              {selectedOption === 'pitr_0' ||
              (selectedPitr?.price ?? 0) < (subscriptionPitr?.variant.price ?? 0)
                ? subscription?.billing_via_partner === false &&
                  // Old addon billing with upfront payment
                  subscription.usage_based_billing_project_addons === false && (
                    <p className="text-sm text-foreground-light">
                      Upon clicking confirm, the add-on is removed immediately and any unused time
                      in the current billing cycle is added as prorated credits to your organization
                      and used in subsequent billing cycles.
                    </p>
                  )
                : !subscription?.billing_via_partner && (
                    <p className="text-sm text-foreground-light">
                      {subscription?.usage_based_billing_project_addons === false ? (
                        <span>
                          Upon clicking confirm, the amount of{' '}
                          <span className="text-foreground">
                            {formatCurrency(selectedPitr?.price)}
                          </span>{' '}
                          will be added to your monthly invoice. The addon is prepaid per month and
                          in case of a downgrade, you get credits for the remaining time. For the
                          current billing cycle you're immediately charged a prorated amount for the
                          remaining days.
                        </span>
                      ) : (
                        <span>
                          There are no immediate charges. The addon is billed at the end of your
                          billing cycle based on your usage and prorated to the hour.
                        </span>
                      )}
                    </p>
                  )}

              {
                // Billed via partner
                subscription?.billing_via_partner &&
                  // Project addons are still billed the old way (upfront payment)
                  subscription?.usage_based_billing_project_addons === false &&
                  // Scheduled billing plan change
                  subscription.scheduled_plan_change?.target_plan !== undefined && (
                    <Alert_Shadcn_ variant={'warning'} className="mb-2">
                      <AlertTriangle className="h-4 w-4" />
                      <AlertDescription_Shadcn_>
                        You have a scheduled subscription change that will be canceled if you change
                        your PITR add on.
                      </AlertDescription_Shadcn_>
                    </Alert_Shadcn_>
                  )
              }
            </>
          )}
        </div>
      </SidePanel.Content>
    </SidePanel>
  )
}

export default PITRSidePanel