import { zodResolver } from '@hookform/resolvers/zod'
import { useFlag, useParams } from 'common'
import { AlertCircle, AlertTriangle } from 'lucide-react'
import Link from 'next/link'
import { useRouter } from 'next/router'
import { useEffect, useState } from 'react'
import { useForm } from 'react-hook-form'
import { toast } from 'sonner'
import {
  Alert,
  AlertDescription,
  AlertTitle,
  Badge,
  Button,
  Dialog,
  DialogContent,
  DialogFooter,
  DialogHeader,
  DialogSection,
  DialogSectionSeparator,
  DialogTitle,
  DialogTrigger,
  Form,
  FormControl,
  FormField,
  Select,
  SelectContent,
  SelectGroup,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from 'ui'
import { Admonition } from 'ui-patterns/admonition'
import { FormItemLayout } from 'ui-patterns/form/FormItemLayout/FormItemLayout'
import { z } from 'zod'

import { PLAN_DETAILS } from '@/components/interfaces/DiskManagement/ui/DiskManagement.constants'
import { Markdown } from '@/components/interfaces/Markdown'
import { extractPostgresVersionDetails } from '@/components/interfaces/ProjectCreation/PostgresVersionSelector'
import { ButtonTooltip } from '@/components/ui/ButtonTooltip'
import { useDiskAttributesQuery } from '@/data/config/disk-attributes-query'
import {
  ProjectUpgradeTargetVersion,
  useProjectUpgradeEligibilityQuery,
} from '@/data/config/project-upgrade-eligibility-query'
import { useSetProjectStatus } from '@/data/projects/project-detail-query'
import { useProjectUpgradeMutation } from '@/data/projects/project-upgrade-mutation'
import { useSelectedOrganizationQuery } from '@/hooks/misc/useSelectedOrganization'
import { DOCS_URL, PROJECT_STATUS } from '@/lib/constants'

const formatValue = ({ postgres_version, release_channel }: ProjectUpgradeTargetVersion) => {
  return `${postgres_version}|${release_channel}`
}

export const ProjectUpgradeAlert = () => {
  const router = useRouter()
  const { ref } = useParams()
  const { data: org } = useSelectedOrganizationQuery()
  const { setProjectStatus } = useSetProjectStatus()

  const [showUpgradeModal, setShowUpgradeModal] = useState(false)
  const projectUpgradeDisabled = useFlag('disableProjectUpgrade')

  const planId = org?.plan.id ?? 'free'

  const { data: diskAttributes } = useDiskAttributesQuery({ projectRef: ref })
  const { includedDiskGB: includedDiskGBMeta } = PLAN_DETAILS[planId]
  const includedDiskGB = includedDiskGBMeta[diskAttributes?.attributes.type ?? 'gp3']
  const isDiskSizeUpdated = diskAttributes?.attributes.size_gb !== includedDiskGB

  const { data } = useProjectUpgradeEligibilityQuery({ projectRef: ref })
  const currentPgVersion = (data?.current_app_version ?? '').split('supabase-postgres-')[1]
  const latestPgVersion = (data?.latest_app_version ?? '').split('supabase-postgres-')[1]

  const durationEstimateHours = data?.duration_estimate_hours || 1
  const legacyAuthCustomRoles = data?.legacy_auth_custom_roles || []

  const { mutate: upgradeProject, isPending: isUpgrading } = useProjectUpgradeMutation({
    onSuccess: (res, variables) => {
      setProjectStatus({ ref: variables.ref, status: PROJECT_STATUS.UPGRADING })
      toast.success('Upgrading project')
      router.push(`/project/${variables.ref}?upgradeInitiated=true&trackingId=${res.tracking_id}`)
    },
  })

  const onConfirmUpgrade = async (values: z.infer<typeof FormSchema>) => {
    if (!ref) return toast.error('Project ref not found')

    const { postgresVersionSelection } = values

    const versionDetails = extractPostgresVersionDetails(postgresVersionSelection)
    if (!versionDetails) return toast.error('Invalid Postgres version')
    if (!versionDetails.postgresEngine) return toast.error('Missing target version')

    upgradeProject({
      ref,
      target_version: versionDetails.postgresEngine,
      release_channel: versionDetails.releaseChannel,
    })
  }

  const FormSchema = z.object({
    postgresVersionSelection: z.string(),
  })

  const form = useForm<z.infer<typeof FormSchema>>({
    resolver: zodResolver(FormSchema),
    mode: 'onChange',
    defaultValues: {
      postgresVersionSelection: '',
    },
  })

  useEffect(() => {
    const defaultValue = data?.target_upgrade_versions?.[0]
      ? formatValue(data.target_upgrade_versions[0])
      : ''
    form.setValue('postgresVersionSelection', defaultValue)
  }, [data, form])

  return (
    <Alert title="Your project can be upgraded to the latest version of Postgres">
      <AlertTitle>Your project can be upgraded to the latest version of Postgres</AlertTitle>
      <AlertDescription>
        <p>The latest version of Postgres ({latestPgVersion}) is available for your project.</p>
        <Dialog open={showUpgradeModal} onOpenChange={(open) => setShowUpgradeModal(open)}>
          <DialogTrigger asChild>
            <ButtonTooltip
              size="tiny"
              variant="primary"
              className="mt-2"
              disabled={projectUpgradeDisabled}
              tooltip={{
                content: {
                  side: 'bottom',
                  align: 'center',
                  text: projectUpgradeDisabled
                    ? 'Project upgrade is currently disabled'
                    : undefined,
                },
              }}
            >
              Upgrade project
            </ButtonTooltip>
          </DialogTrigger>
          <DialogContent size="small">
            <DialogHeader>
              <DialogTitle>Confirm to upgrade Postgres version</DialogTitle>
            </DialogHeader>
            <DialogSectionSeparator />
            <Form {...form}>
              <form onSubmit={form.handleSubmit(onConfirmUpgrade)}>
                <Admonition
                  type="warning"
                  className="border-x-0 border-t-0 rounded-none"
                  title={`Your project will be offline for up to ${durationEstimateHours} hour${durationEstimateHours === 1 ? '' : 's'}`}
                  description="It is advised to upgrade at a time when there will be minimal impact for your application."
                />
                <DialogSection>
                  <div className="space-y-4">
                    <p className="text-sm">
                      All services will be offline and you will not be able to downgrade back to
                      Postgres {currentPgVersion}.
                    </p>
                    {isDiskSizeUpdated && (
                      <Markdown
                        extLinks
                        className="text-foreground"
                        content={`Your current disk size of ${diskAttributes?.attributes.size_gb}GB will also be
                      [right-sized](${DOCS_URL}/guides/platform/upgrading#disk-sizing) with the upgrade.`}
                      />
                    )}
                    {/* @ts-ignore */}
                    {(data?.potential_breaking_changes ?? []).length > 0 && (
                      <Alert variant="destructive" title="Breaking changes">
                        <AlertCircle className="h-4 w-4" strokeWidth={2} />
                        <AlertTitle>Breaking changes</AlertTitle>
                        <AlertDescription className="flex flex-col gap-3">
                          <p>
                            Your project will be upgraded across major versions of Postgres. This
                            may involve breaking changes.
                          </p>

                          <div>
                            <Button size="tiny" variant="default" asChild>
                              <Link
                                href={`${DOCS_URL}/guides/platform/migrating-and-upgrading-projects#caveats`}
                                target="_blank"
                                rel="noreferrer"
                              >
                                View docs
                              </Link>
                            </Button>
                          </div>
                        </AlertDescription>
                      </Alert>
                    )}
                    {legacyAuthCustomRoles.length > 0 && (
                      <Alert
                        variant="warning"
                        title="Custom Postgres roles using md5 authentication have been detected"
                      >
                        <AlertTriangle className="h-4 w-4" strokeWidth={2} />
                        <AlertTitle>
                          Custom Postgres roles will not work automatically after upgrade
                        </AlertTitle>
                        <AlertDescription className="flex flex-col gap-3">
                          <p>You must run a series of commands after upgrading.</p>
                          <p>
                            This is because new Postgres versions use scram-sha-256 authentication
                            by default and do not support md5, as it has been deprecated.
                          </p>
                          <div>
                            <p className="mb-1">Run the following commands after the upgrade:</p>
                            <div className="flex items-baseline gap-2">
                              <code className="text-xs">
                                {legacyAuthCustomRoles.map((role) => (
                                  <div key={role} className="pb-1">
                                    ALTER ROLE <span className="text-brand">{role}</span> WITH
                                    PASSWORD '<span className="text-brand">newpassword</span>';
                                  </div>
                                ))}
                              </code>
                            </div>
                          </div>
                          <div>
                            <Button size="tiny" variant="default" asChild>
                              <Link
                                href={`${DOCS_URL}/guides/platform/migrating-and-upgrading-projects#caveats`}
                                target="_blank"
                                rel="noreferrer"
                              >
                                View docs
                              </Link>
                            </Button>
                          </div>
                        </AlertDescription>
                      </Alert>
                    )}
                    <FormField
                      control={form.control}
                      name="postgresVersionSelection"
                      render={({ field }) => (
                        <FormItemLayout label="Select the version of Postgres to upgrade to">
                          <FormControl>
                            <Select value={field.value} onValueChange={field.onChange}>
                              <SelectTrigger>
                                <SelectValue placeholder="Select a Postgres version" />
                              </SelectTrigger>
                              <SelectContent>
                                <SelectGroup>
                                  {(data?.target_upgrade_versions || [])?.map((value) => {
                                    const postgresVersion =
                                      value.app_version.split('supabase-postgres-')[1]
                                    return (
                                      <SelectItem
                                        key={formatValue(value)}
                                        value={formatValue(value)}
                                      >
                                        <div className="flex items-center gap-3">
                                          <span className="text-foreground">{postgresVersion}</span>
                                          {value.release_channel !== 'ga' && (
                                            <Badge variant="warning">{value.release_channel}</Badge>
                                          )}
                                        </div>
                                      </SelectItem>
                                    )
                                  })}
                                </SelectGroup>
                              </SelectContent>
                            </Select>
                          </FormControl>
                        </FormItemLayout>
                      )}
                    />
                  </div>
                </DialogSection>
                <DialogFooter>
                  <Button
                    variant="default"
                    onClick={() => setShowUpgradeModal(false)}
                    disabled={isUpgrading}
                  >
                    Cancel
                  </Button>
                  <Button type="submit" disabled={isUpgrading} loading={isUpgrading}>
                    Confirm upgrade
                  </Button>
                </DialogFooter>
              </form>
            </Form>
          </DialogContent>
        </Dialog>
      </AlertDescription>
    </Alert>
  )
}