import { ChevronDown } from 'lucide-react'
import Link from 'next/link'
import { useEffect, useMemo, useState } from 'react'
import { toast } from 'sonner'

import { useParams } from 'common'
import {
  calculateIOPSPrice,
  calculateThroughputPrice,
} from 'components/interfaces/DiskManagement/DiskManagement.utils'
import {
  DISK_PRICING,
  DiskType,
} from 'components/interfaces/DiskManagement/ui/DiskManagement.constants'
import { DocsButton } from 'components/ui/DocsButton'
import { useDiskAttributesQuery } from 'data/config/disk-attributes-query'
import { useEnablePhysicalBackupsMutation } from 'data/database/enable-physical-backups-mutation'
import { useOverdueInvoicesQuery } from 'data/invoices/invoices-overdue-query'
import { useProjectDetailQuery } from 'data/projects/project-detail-query'
import { Region, useReadReplicaSetUpMutation } from 'data/read-replicas/replica-setup-mutation'
import {
  MAX_REPLICAS_ABOVE_XL,
  MAX_REPLICAS_BELOW_XL,
  useReadReplicasQuery,
} from 'data/read-replicas/replicas-query'
import { useProjectAddonsQuery } from 'data/subscriptions/project-addons-query'
import { useSelectedOrganizationQuery } from 'hooks/misc/useSelectedOrganization'
import { useIsAwsK8sCloudProvider, useSelectedProjectQuery } from 'hooks/misc/useSelectedProject'
import { AWS_REGIONS_DEFAULT, BASE_PATH } from 'lib/constants'
import { formatCurrency } from 'lib/helpers'
import type { AWS_REGIONS_KEYS } from 'shared-data'
import { AWS_REGIONS } from 'shared-data'
import {
  AlertDescription_Shadcn_,
  AlertTitle_Shadcn_,
  Alert_Shadcn_,
  Button,
  CollapsibleContent_Shadcn_,
  CollapsibleTrigger_Shadcn_,
  Collapsible_Shadcn_,
  Listbox,
  SidePanel,
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow,
  WarningIcon,
  cn,
} from 'ui'
import { AVAILABLE_REPLICA_REGIONS } from './InstanceConfiguration.constants'

// [Joshen] FYI this is purely for AWS only, need to update to support Fly eventually

interface DeployNewReplicaPanelProps {
  visible: boolean
  selectedDefaultRegion?: AWS_REGIONS_KEYS
  onSuccess: () => void
  onClose: () => void
}

const DeployNewReplicaPanel = ({
  visible,
  selectedDefaultRegion,
  onSuccess,
  onClose,
}: DeployNewReplicaPanelProps) => {
  const { ref: projectRef } = useParams()
  const { data: project } = useSelectedProjectQuery()
  const { data: org } = useSelectedOrganizationQuery()

  const { data } = useReadReplicasQuery({ projectRef })
  const { data: addons, isSuccess } = useProjectAddonsQuery({ projectRef })
  const { data: diskConfiguration } = useDiskAttributesQuery({ projectRef })

  const isNotOnTeamOrEnterprisePlan = useMemo(
    () => !['team', 'enterprise'].includes(org?.plan.id ?? ''),
    [org]
  )
  const { data: allOverdueInvoices } = useOverdueInvoicesQuery({
    enabled: isNotOnTeamOrEnterprisePlan,
  })
  const overdueInvoices = (allOverdueInvoices ?? []).filter(
    (x) => x.organization_id === project?.organization_id
  )
  const hasOverdueInvoices = overdueInvoices.length > 0 && isNotOnTeamOrEnterprisePlan
  const isAwsK8s = useIsAwsK8sCloudProvider()

  // Opting for useState temporarily as Listbox doesn't seem to work with react-hook-form yet
  const [defaultRegion] = Object.entries(AWS_REGIONS).find(
    ([_, name]) => name === AWS_REGIONS_DEFAULT
  ) ?? ['ap-southeast-1']
  // Will be following the primary's compute size for the time being
  const defaultCompute =
    addons?.selected_addons.find((addon) => addon.type === 'compute_instance')?.variant
      .identifier ?? 'ci_micro'

  // @ts-ignore
  const { size_gb, type, throughput_mbps, iops } = diskConfiguration?.attributes ?? {}
  const showNewDiskManagementUI = project?.cloud_provider === 'AWS'
  const readReplicaDiskSizes = (size_gb ?? 0) * 1.25
  const additionalCostDiskSize =
    readReplicaDiskSizes * (DISK_PRICING[type as DiskType]?.storage ?? 0)
  const additionalCostIOPS = calculateIOPSPrice({
    oldStorageType: type as DiskType,
    newStorageType: type as DiskType,
    oldProvisionedIOPS: 0,
    newProvisionedIOPS: iops ?? 0,
    numReplicas: 0,
  }).newPrice
  const additionalCostThroughput =
    type === 'gp3'
      ? calculateThroughputPrice({
          storageType: type as DiskType,
          newThroughput: throughput_mbps ?? 0,
          oldThroughput: 0,
          numReplicas: 0,
        }).newPrice
      : 0

  const [refetchInterval, setRefetchInterval] = useState<number | false>(false)
  const [selectedRegion, setSelectedRegion] = useState<string>(defaultRegion)
  const [selectedCompute, setSelectedCompute] = useState(defaultCompute)

  useProjectDetailQuery(
    { ref: projectRef },
    {
      refetchInterval,
      refetchOnWindowFocus: false,
      onSuccess: (data) => {
        if (data.is_physical_backups_enabled) setRefetchInterval(false)
      },
    }
  )

  const { mutate: enablePhysicalBackups, isLoading: isEnabling } = useEnablePhysicalBackupsMutation(
    {
      onSuccess: () => {
        toast.success(
          'Physical backups are currently being enabled, please check back in a few minutes!'
        )
        setRefetchInterval(5000)
      },
    }
  )

  const { mutate: setUpReplica, isLoading: isSettingUp } = useReadReplicaSetUpMutation({
    onSuccess: () => {
      const region = AVAILABLE_REPLICA_REGIONS.find((r) => r.key === selectedRegion)?.name
      toast.success(`Spinning up new replica in ${region ?? ' Unknown'}...`)
      onSuccess()
      onClose()
    },
  })

  const currentPgVersion = Number(
    (project?.dbVersion ?? '').split('supabase-postgres-')[1]?.split('.')[0]
  )

  const maxNumberOfReplicas = ['ci_micro', 'ci_small', 'ci_medium', 'ci_large'].includes(
    selectedCompute
  )
    ? MAX_REPLICAS_BELOW_XL
    : MAX_REPLICAS_ABOVE_XL
  const reachedMaxReplicas =
    (data ?? []).filter((db) => db.identifier !== projectRef).length >= maxNumberOfReplicas
  const isFreePlan = org?.plan.id === 'free'
  const isAWSProvider = project?.cloud_provider === 'AWS'
  const isWalgEnabled = project?.is_physical_backups_enabled
  const currentComputeAddon = addons?.selected_addons.find(
    (addon) => addon.type === 'compute_instance'
  )
  const isProWithSpendCapEnabled = org?.plan.id === 'pro' && !org.usage_billing_enabled
  const isMinimallyOnSmallCompute =
    currentComputeAddon?.variant.identifier !== undefined &&
    currentComputeAddon?.variant.identifier !== 'ci_micro'
  const canDeployReplica =
    !reachedMaxReplicas &&
    currentPgVersion >= 15 &&
    isAWSProvider &&
    !isFreePlan &&
    isWalgEnabled &&
    currentComputeAddon !== undefined &&
    !hasOverdueInvoices &&
    !isAwsK8s &&
    !isProWithSpendCapEnabled

  const computeAddons =
    addons?.available_addons.find((addon) => addon.type === 'compute_instance')?.variants ?? []
  const selectedComputeMeta = computeAddons.find((addon) => addon.identifier === selectedCompute)
  const estComputeMonthlyCost = Math.floor((selectedComputeMeta?.price ?? 0) * 730) // 730 hours in a month

  const availableRegions =
    process.env.NEXT_PUBLIC_ENVIRONMENT === 'staging'
      ? AVAILABLE_REPLICA_REGIONS.filter((x) =>
          ['SOUTHEAST_ASIA', 'CENTRAL_EU', 'EAST_US'].includes(x.key)
        )
      : AVAILABLE_REPLICA_REGIONS

  const onSubmit = async () => {
    const regionKey = AWS_REGIONS[selectedRegion as AWS_REGIONS_KEYS].code
    if (!projectRef) return console.error('Project is required')
    if (!regionKey) return toast.error('Unable to deploy replica: Unsupported region selected')

    const primary = data?.find((db) => db.identifier === projectRef)
    setUpReplica({ projectRef, region: regionKey as Region, size: primary?.size ?? 't4g.small' })
  }

  useEffect(() => {
    if (visible && isSuccess) {
      if (selectedDefaultRegion !== undefined) {
        setSelectedRegion(selectedDefaultRegion)
      } else if (defaultRegion) {
        setSelectedRegion(defaultRegion)
      }
      if (defaultCompute !== undefined) setSelectedCompute(defaultCompute)
    }
  }, [visible, isSuccess])

  return (
    <SidePanel
      visible={visible}
      onCancel={onClose}
      loading={isSettingUp}
      disabled={!canDeployReplica}
      className={cn(showNewDiskManagementUI ? 'max-w-[500px]' : '')}
      header="Deploy a new read replica"
      onConfirm={() => onSubmit()}
      confirmText="Deploy replica"
    >
      <SidePanel.Content className="flex flex-col py-4 gap-y-4">
        {hasOverdueInvoices ? (
          <Alert_Shadcn_>
            <WarningIcon />
            <AlertTitle_Shadcn_>Your organization has overdue invoices</AlertTitle_Shadcn_>
            <AlertDescription_Shadcn_>
              <span>
                Please resolve all outstanding invoices first before deploying a new read replica
              </span>
              <div className="mt-3">
                <Button asChild type="default">
                  <Link href={`/org/${org?.slug}/billing#invoices`}>View invoices</Link>
                </Button>
              </div>
            </AlertDescription_Shadcn_>
          </Alert_Shadcn_>
        ) : !isAWSProvider ? (
          <Alert_Shadcn_>
            <WarningIcon />
            <AlertTitle_Shadcn_>
              Read replicas are only supported for projects provisioned via AWS
            </AlertTitle_Shadcn_>
            <AlertDescription_Shadcn_>
              <span>
                Projects provisioned by other cloud providers currently will not be able to use read
                replicas
              </span>
              <DocsButton
                abbrev={false}
                className="mt-3"
                href="https://supabase.com/docs/guides/platform/read-replicas#prerequisites"
              />
            </AlertDescription_Shadcn_>
          </Alert_Shadcn_>
        ) : isAwsK8s ? (
          <Alert_Shadcn_>
            <WarningIcon />
            <AlertTitle_Shadcn_>
              Read replicas are not supported for AWS (Revamped) projects
            </AlertTitle_Shadcn_>
            <AlertDescription_Shadcn_>
              <span>
                Projects provisioned by other cloud providers currently will not be able to use read
                replicas
              </span>
            </AlertDescription_Shadcn_>
          </Alert_Shadcn_>
        ) : currentPgVersion < 15 ? (
          <Alert_Shadcn_>
            <WarningIcon />
            <AlertTitle_Shadcn_>
              Read replicas can only be deployed with projects on Postgres version 15 and above
            </AlertTitle_Shadcn_>
            <AlertDescription_Shadcn_>
              If you'd like to use read replicas, please contact us via support
            </AlertDescription_Shadcn_>
            <AlertDescription_Shadcn_ className="mt-2">
              <Button type="default">
                <Link
                  href={`/support/new?category=Sales&ref=${projectRef}&subject=Enquiry%20on%20read%20replicas&message=Project%20DB%20version:%20${project?.dbVersion}`}
                  target="_blank"
                  rel="noreferrer"
                >
                  Contact support
                </Link>
              </Button>
            </AlertDescription_Shadcn_>
          </Alert_Shadcn_>
        ) : !isMinimallyOnSmallCompute ? (
          <Alert_Shadcn_>
            <WarningIcon />
            <AlertTitle_Shadcn_>
              Project required to at least be on a Small compute
            </AlertTitle_Shadcn_>
            <AlertDescription_Shadcn_>
              <span>
                This is to ensure that read replicas can keep up with the primary databases'
                activities.
              </span>
              <div className="flex items-center gap-x-2 mt-3">
                <Button asChild type="default">
                  <Link
                    href={
                      isFreePlan
                        ? `/org/${org?.slug}/billing?panel=subscriptionPlan&source=deployNewReplicaPanelSmallCompute`
                        : `/project/${projectRef}/settings/compute-and-disk`
                    }
                  >
                    {isFreePlan ? 'Upgrade to Pro' : 'Change compute size'}
                  </Link>
                </Button>
                <DocsButton
                  abbrev={false}
                  href="https://supabase.com/docs/guides/platform/read-replicas#prerequisites"
                />
              </div>
            </AlertDescription_Shadcn_>
          </Alert_Shadcn_>
        ) : !isWalgEnabled ? (
          <Alert_Shadcn_>
            <WarningIcon />
            <AlertTitle_Shadcn_>
              {refetchInterval !== false
                ? 'Physical backups are currently being enabled'
                : 'Physical backups are required to deploy replicas'}
            </AlertTitle_Shadcn_>
            {refetchInterval === false && (
              <AlertDescription_Shadcn_ className="mb-2">
                Physical backups are used under the hood to spin up read replicas for your project.
              </AlertDescription_Shadcn_>
            )}
            <AlertDescription_Shadcn_>
              {refetchInterval !== false
                ? 'This warning will go away once physical backups have been enabled - check back in a few minutes!'
                : 'Enabling physical backups will take a few minutes, after which you will be able to deploy read replicas.'}
            </AlertDescription_Shadcn_>
            {refetchInterval !== false ? (
              <AlertDescription_Shadcn_ className="mt-2">
                You may start deploying read replicas thereafter once this is completed.
              </AlertDescription_Shadcn_>
            ) : (
              <AlertDescription_Shadcn_ className="flex items-center gap-x-2 mt-3">
                <Button
                  type="default"
                  loading={isEnabling}
                  disabled={isEnabling}
                  onClick={() => {
                    if (projectRef) enablePhysicalBackups({ ref: projectRef })
                  }}
                >
                  Enable physical backups
                </Button>
                <DocsButton
                  abbrev={false}
                  href="https://supabase.com/docs/guides/platform/read-replicas#how-are-read-replicas-made"
                />
              </AlertDescription_Shadcn_>
            )}
          </Alert_Shadcn_>
        ) : isProWithSpendCapEnabled ? (
          <Alert_Shadcn_>
            <WarningIcon />
            <AlertTitle_Shadcn_>
              Spend cap needs to be disabled to deploy replicas
            </AlertTitle_Shadcn_>
            <AlertDescription_Shadcn_>
              <span>
                Launching a replica incurs additional disk size that will exceed the plan's quota.
                Disable the spend cap first to allow overages before launching a replica.
              </span>
              <div className="flex items-center gap-x-2 mt-3">
                <Button asChild type="default">
                  <Link href={`/org/${org?.slug}/billing?panel=costControl`}>
                    Disable spend cap
                  </Link>
                </Button>
              </div>
            </AlertDescription_Shadcn_>
          </Alert_Shadcn_>
        ) : reachedMaxReplicas ? (
          <Alert_Shadcn_>
            <WarningIcon />
            <AlertTitle_Shadcn_>
              You can only deploy up to {maxNumberOfReplicas} read replicas at once
            </AlertTitle_Shadcn_>
            <AlertDescription_Shadcn_>
              If you'd like to spin up another read replica, please drop an existing replica first.
            </AlertDescription_Shadcn_>
            {maxNumberOfReplicas === MAX_REPLICAS_BELOW_XL && (
              <>
                <AlertDescription_Shadcn_>
                  <span>
                    Alternatively, you may deploy up to{' '}
                    <span className="text-foreground">{MAX_REPLICAS_ABOVE_XL}</span> replicas if
                    your project is on an XL compute or higher.
                  </span>
                  <div className="flex items-center gap-x-2 mt-3">
                    <Button asChild type="default">
                      <Link
                        href={
                          isFreePlan
                            ? `/org/${org?.slug}/billing?panel=subscriptionPlan&source=deployNewReplicaPanelMaxReplicas`
                            : `/project/${projectRef}/settings/compute-and-disk`
                        }
                      >
                        Upgrade compute size
                      </Link>
                    </Button>
                  </div>
                </AlertDescription_Shadcn_>
              </>
            )}
          </Alert_Shadcn_>
        ) : null}

        <div className="flex flex-col gap-y-6 mt-2">
          <Listbox
            size="small"
            id="region"
            name="region"
            disabled={!canDeployReplica}
            value={selectedRegion}
            onChange={setSelectedRegion}
            label="Select a region to deploy your read replica in"
          >
            {availableRegions.map((region) => (
              <Listbox.Option
                key={region.key}
                label={region.name}
                value={region.key}
                addOnBefore={() => (
                  <img
                    alt="region icon"
                    className="w-5 rounded-sm"
                    src={`${BASE_PATH}/img/regions/${region.region}.svg`}
                  />
                )}
              >
                {region.name}
              </Listbox.Option>
            ))}
          </Listbox>

          <div className="flex flex-col gap-y-2">
            {showNewDiskManagementUI ? (
              <>
                <Collapsible_Shadcn_>
                  <CollapsibleTrigger_Shadcn_ className="w-full flex items-center justify-between [&[data-state=open]>svg]:!-rotate-180">
                    <p className="text-sm text-left">
                      New replica will cost an additional{' '}
                      <span translate="no">
                        {formatCurrency(
                          estComputeMonthlyCost +
                            additionalCostDiskSize +
                            Number(additionalCostIOPS) +
                            Number(additionalCostThroughput)
                        )}
                        /month
                      </span>
                    </p>
                    <ChevronDown size={14} className="transition" />
                  </CollapsibleTrigger_Shadcn_>
                  <CollapsibleContent_Shadcn_ className="flex flex-col gap-y-1 mt-1">
                    <p className="text-foreground-light text-sm">
                      Read replicas will match the compute size of your primary database and will
                      include 25% more disk size than the primary database to accommodate WAL files.
                    </p>
                    <p className="text-foreground-light text-sm">
                      The additional cost for the replica breaks down to:
                    </p>
                    <Table>
                      <TableHeader className="font-mono uppercase text-xs [&_th]:h-auto [&_th]:pb-2 [&_th]:pt-4">
                        <TableRow>
                          <TableHead className="w-[140px] pl-0">Item</TableHead>
                          <TableHead>Description</TableHead>
                          <TableHead className="text-right pr-0">Cost (/month)</TableHead>
                        </TableRow>
                      </TableHeader>
                      <TableBody className="[&_td]:py-0 [&_tr]:h-[50px] [&_tr]:border-dotted">
                        <TableRow>
                          <TableCell className="pl-0">Compute size</TableCell>
                          <TableCell>{selectedComputeMeta?.name}</TableCell>
                          <TableCell className="text-right font-mono pr-0" translate="no">
                            {formatCurrency(estComputeMonthlyCost)}
                          </TableCell>
                        </TableRow>
                        <TableRow>
                          <TableCell className="pl-0">Disk size</TableCell>
                          <TableCell>
                            {((size_gb ?? 0) * 1.25).toLocaleString()} GB ({type})
                          </TableCell>
                          <TableCell className="text-right font-mono pr-0" translate="no">
                            {formatCurrency(additionalCostDiskSize)}
                          </TableCell>
                        </TableRow>
                        <TableRow>
                          <TableCell className="pl-0">IOPS</TableCell>
                          <TableCell>{iops?.toLocaleString()} IOPS</TableCell>
                          <TableCell className="text-right font-mono pr-0" translate="no">
                            {formatCurrency(+additionalCostIOPS)}
                          </TableCell>
                        </TableRow>
                        {type === 'gp3' && (
                          <TableRow>
                            <TableCell className="pl-0">Throughput</TableCell>
                            <TableCell>{throughput_mbps?.toLocaleString()} MB/s</TableCell>
                            <TableCell className="text-right font-mono pr-0">
                              {formatCurrency(+additionalCostThroughput)}
                            </TableCell>
                          </TableRow>
                        )}
                      </TableBody>
                    </Table>
                  </CollapsibleContent_Shadcn_>
                </Collapsible_Shadcn_>
              </>
            ) : (
              <p className="text-foreground-light text-sm">
                Read replicas will be on the same compute size as your primary database. Deploying a
                read replica on the{' '}
                <span className="text-foreground">{selectedComputeMeta?.name}</span> size incurs
                additional{' '}
                <span className="text-foreground" translate="no">
                  {selectedComputeMeta?.price_description}
                </span>
                .
              </p>
            )}

            <p className="text-foreground-light text-sm">
              Read more about{' '}
              <Link
                href="https://supabase.com/docs/guides/platform/manage-your-usage/read-replicas"
                target="_blank"
                rel="noreferrer"
                className="underline hover:text-foreground transition"
              >
                billing
              </Link>{' '}
              for read replicas.
            </p>
          </div>
        </div>
      </SidePanel.Content>
    </SidePanel>
  )
}

export default DeployNewReplicaPanel