import { zodResolver } from '@hookform/resolvers/zod'
import { PermissionAction } from '@supabase/shared-types/out/constants'
import { useParams } from 'common'
import Link from 'next/link'
import { useEffect } from 'react'
import { useForm } from 'react-hook-form'
import { toast } from 'sonner'
import {
  Button,
  Card,
  CardContent,
  CardFooter,
  Form,
  FormControl,
  FormField,
  FormInputGroupInput,
  InputGroup,
  InputGroupAddon,
  InputGroupText,
  Switch,
  Tooltip,
  TooltipContent,
  TooltipTrigger,
} from 'ui'
import { FormItemLayout } from 'ui-patterns/form/FormItemLayout/FormItemLayout'
import {
  PageSection,
  PageSectionContent,
  PageSectionDescription,
  PageSectionMeta,
  PageSectionSummary,
  PageSectionTitle,
} from 'ui-patterns/PageSection'
import { GenericSkeletonLoader } from 'ui-patterns/ShimmeringLoader'
import * as z from 'zod'

import { isSmtpEnabled } from '../SmtpForm/SmtpForm.utils'
import AlertError from '@/components/ui/AlertError'
import { InlineLink } from '@/components/ui/InlineLink'
import NoPermission from '@/components/ui/NoPermission'
import { useAuthConfigQuery } from '@/data/auth/auth-config-query'
import { useAuthConfigUpdateMutation } from '@/data/auth/auth-config-update-mutation'
import { useAsyncCheckPermissions } from '@/hooks/misc/useCheckPermissions'
import { DOCS_URL } from '@/lib/constants'

export const RateLimits = () => {
  const { ref: projectRef } = useParams()
  const { can: canUpdateConfig } = useAsyncCheckPermissions(
    PermissionAction.UPDATE,
    'custom_config_gotrue'
  )
  const { can: canReadConfig } = useAsyncCheckPermissions(
    PermissionAction.READ,
    'custom_config_gotrue'
  )

  const {
    data: authConfig,
    error,
    isPending: isLoading,
    isError,
    isSuccess,
  } = useAuthConfigQuery({ projectRef })
  const { mutate: updateAuthConfig, isPending: isUpdatingConfig } = useAuthConfigUpdateMutation({
    onSuccess: () => {
      toast.success('Rate limits successfully updated')
    },
    onError: (error) => {
      toast.error(`Failed to update rate limits: ${error.message}`)
    },
  })

  const canUpdateEmailLimit = authConfig?.EXTERNAL_EMAIL_ENABLED && isSmtpEnabled(authConfig)
  const canUpdateSMSRateLimit = authConfig?.EXTERNAL_PHONE_ENABLED
  const canUpdateAnonymousUsersRateLimit = authConfig?.EXTERNAL_ANONYMOUS_USERS_ENABLED
  const canUpdateWeb3RateLimit = authConfig?.EXTERNAL_WEB3_SOLANA_ENABLED

  const IPForwardingFormSchema = z.object({
    SECURITY_SB_FORWARDED_FOR_ENABLED: z.coerce.boolean(),
  })

  const ipForwardingForm = useForm<z.infer<typeof IPForwardingFormSchema>>({
    resolver: zodResolver(IPForwardingFormSchema as any),
    defaultValues: {
      SECURITY_SB_FORWARDED_FOR_ENABLED: false,
    },
  })

  const onSubmitIPForwardingForm = (data: z.infer<typeof IPForwardingFormSchema>) => {
    if (!projectRef) return console.error('Project ref is required')

    const payload: Partial<z.infer<typeof IPForwardingFormSchema>> = {}

    if (data.SECURITY_SB_FORWARDED_FOR_ENABLED !== authConfig?.SECURITY_SB_FORWARDED_FOR_ENABLED) {
      payload.SECURITY_SB_FORWARDED_FOR_ENABLED = data.SECURITY_SB_FORWARDED_FOR_ENABLED
    }

    updateAuthConfig(
      { projectRef, config: payload },
      { onSuccess: () => ipForwardingForm.reset(data) }
    )
  }

  const RateLimitFormSchema = z.object({
    RATE_LIMIT_TOKEN_REFRESH: z.coerce
      .number()
      .min(0, 'Must be not be lower than 0')
      .max(32767, 'Must not be more than 32,767 an 5 minutes'),
    RATE_LIMIT_VERIFY: z.coerce
      .number()
      .min(0, 'Must be not be lower than 0')
      .max(32767, 'Must not be more than 32,767 an 5 minutes'),
    RATE_LIMIT_EMAIL_SENT: z.coerce
      .number()
      .min(0, 'Must be not be lower than 0')
      .max(32767, 'Must not be more than 32,767 an hour'),
    RATE_LIMIT_SMS_SENT: z.coerce
      .number()
      .min(0, 'Must be not be lower than 0')
      .max(32767, 'Must not be more than 32,767 an hour'),
    RATE_LIMIT_ANONYMOUS_USERS: z.coerce
      .number()
      .min(0, 'Must be not be lower than 0')
      .max(32767, 'Must not be more than 32,767 an hour'),
    RATE_LIMIT_OTP: z.coerce
      .number()
      .min(0, 'Must be not be lower than 0')
      .max(32767, 'Must not be more than 32,767 an hour'),
    RATE_LIMIT_WEB3: z.coerce
      .number()
      .min(0, 'Must be not be lower than 0')
      .max(32767, 'Must not be more than 32,767 an hour'),
  })

  const rateLimitForm = useForm<z.infer<typeof RateLimitFormSchema>>({
    resolver: zodResolver(RateLimitFormSchema as any),
    defaultValues: {
      RATE_LIMIT_TOKEN_REFRESH: 0,
      RATE_LIMIT_VERIFY: 0,
      RATE_LIMIT_EMAIL_SENT: 0,
      RATE_LIMIT_SMS_SENT: 0,
      RATE_LIMIT_ANONYMOUS_USERS: 0,
      RATE_LIMIT_OTP: 0,
      RATE_LIMIT_WEB3: 0,
    },
  })

  const onSubmitRateLimitForm = (data: z.infer<typeof RateLimitFormSchema>) => {
    if (!projectRef) return console.error('Project ref is required')

    const payload: Partial<z.infer<typeof RateLimitFormSchema>> = {}
    const params = [
      'RATE_LIMIT_TOKEN_REFRESH',
      'RATE_LIMIT_VERIFY',
      'RATE_LIMIT_EMAIL_SENT',
      'RATE_LIMIT_SMS_SENT',
      'RATE_LIMIT_ANONYMOUS_USERS',
      'RATE_LIMIT_OTP',
      'RATE_LIMIT_WEB3',
    ] as (keyof typeof payload)[]
    params.forEach((param) => {
      if (data[param] !== authConfig?.[param]) payload[param] = data[param]
    })

    updateAuthConfig(
      { projectRef, config: payload },
      { onSuccess: () => rateLimitForm.reset(data) }
    )
  }

  useEffect(() => {
    if (isSuccess) {
      rateLimitForm.reset({
        RATE_LIMIT_TOKEN_REFRESH: authConfig.RATE_LIMIT_TOKEN_REFRESH,
        RATE_LIMIT_VERIFY: authConfig.RATE_LIMIT_VERIFY,
        RATE_LIMIT_EMAIL_SENT: authConfig.RATE_LIMIT_EMAIL_SENT,
        RATE_LIMIT_SMS_SENT: authConfig.RATE_LIMIT_SMS_SENT,
        RATE_LIMIT_ANONYMOUS_USERS: authConfig.RATE_LIMIT_ANONYMOUS_USERS,
        RATE_LIMIT_OTP: authConfig.RATE_LIMIT_OTP,
        RATE_LIMIT_WEB3: authConfig.RATE_LIMIT_WEB3 ?? 0,
      })

      ipForwardingForm.reset({
        SECURITY_SB_FORWARDED_FOR_ENABLED: authConfig.SECURITY_SB_FORWARDED_FOR_ENABLED,
      })
    }
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [isSuccess])

  if (isError) {
    return (
      <PageSection>
        <PageSectionContent>
          <AlertError error={error} subject="Failed to retrieve auth configuration" />
        </PageSectionContent>
      </PageSection>
    )
  }

  if (!canReadConfig) {
    return (
      <PageSection>
        <PageSectionContent>
          <NoPermission resourceText="view auth configuration settings" />
        </PageSectionContent>
      </PageSection>
    )
  }

  if (isLoading) {
    return (
      <PageSection>
        <PageSectionContent>
          <GenericSkeletonLoader />
        </PageSectionContent>
      </PageSection>
    )
  }

  return (
    <>
      <PageSection>
        <PageSectionContent>
          <Form {...rateLimitForm}>
            <form onSubmit={rateLimitForm.handleSubmit(onSubmitRateLimitForm)}>
              <Card>
                <CardContent>
                  <FormField
                    control={rateLimitForm.control}
                    name="RATE_LIMIT_EMAIL_SENT"
                    render={({ field }) => (
                      <FormItemLayout
                        layout="flex-row-reverse"
                        label="Rate limit for sending emails"
                        description="Number of emails that can be sent per hour from your project"
                      >
                        <Tooltip>
                          <TooltipTrigger asChild>
                            <FormControl>
                              <InputGroup>
                                <FormInputGroupInput
                                  type="number"
                                  min={0}
                                  {...field}
                                  disabled={!canUpdateConfig || !canUpdateEmailLimit}
                                />
                                <InputGroupAddon align="inline-end">
                                  <InputGroupText>emails/h</InputGroupText>
                                </InputGroupAddon>
                              </InputGroup>
                            </FormControl>
                          </TooltipTrigger>
                          {!canUpdateConfig || !canUpdateEmailLimit ? (
                            <TooltipContent side="left" className="w-80 p-4">
                              {!authConfig.EXTERNAL_EMAIL_ENABLED ? (
                                <>
                                  <p className="font-medium">
                                    Email-based logins are not enabled for your project
                                  </p>
                                  <p className="mt-1">
                                    Enable email-based logins to update this rate limit
                                  </p>
                                  <div className="mt-3">
                                    <Button asChild type="default" size="tiny">
                                      <Link href={`/project/${projectRef}/auth/providers`}>
                                        View auth providers
                                      </Link>
                                    </Button>
                                  </div>
                                </>
                              ) : (
                                <>
                                  <p className="font-medium">
                                    Custom SMTP provider is required to update this configuration
                                  </p>
                                  <p className="mt-1">
                                    The built-in email service has a fixed rate limit. You will need
                                    to set up your own custom SMTP provider to update your email
                                    rate limit
                                  </p>
                                  <div className="mt-3">
                                    <Button asChild type="default" size="tiny">
                                      <Link href={`/project/${projectRef}/auth/smtp`}>
                                        View SMTP settings
                                      </Link>
                                    </Button>
                                  </div>
                                </>
                              )}
                            </TooltipContent>
                          ) : null}
                        </Tooltip>
                      </FormItemLayout>
                    )}
                  />
                </CardContent>

                <CardContent>
                  <FormField
                    control={rateLimitForm.control}
                    name="RATE_LIMIT_SMS_SENT"
                    render={({ field }) => (
                      <FormItemLayout
                        layout="flex-row-reverse"
                        label="Rate limit for sending SMS messages"
                        description="Number of SMS messages that can be sent per hour from your project"
                      >
                        <Tooltip>
                          <TooltipTrigger asChild>
                            <FormControl>
                              <InputGroup>
                                <FormInputGroupInput
                                  type="number"
                                  min={0}
                                  {...field}
                                  disabled={!canUpdateConfig || !canUpdateSMSRateLimit}
                                />
                                <InputGroupAddon align="inline-end">
                                  <InputGroupText>sms/h</InputGroupText>
                                </InputGroupAddon>
                              </InputGroup>
                            </FormControl>
                          </TooltipTrigger>
                          {!canUpdateConfig || !canUpdateSMSRateLimit ? (
                            <TooltipContent side="left" className="w-80 p-4">
                              <p className="font-medium">
                                Phone-based logins are not enabled for your project
                              </p>
                              <p className="mt-1">
                                Enable phone-based logins to update this rate limit
                              </p>
                              <div className="mt-3">
                                <Button asChild type="default" size="tiny">
                                  <Link href={`/project/${projectRef}/auth/providers`}>
                                    View auth providers
                                  </Link>
                                </Button>
                              </div>
                            </TooltipContent>
                          ) : null}
                        </Tooltip>
                      </FormItemLayout>
                    )}
                  />
                </CardContent>

                <CardContent>
                  <FormField
                    control={rateLimitForm.control}
                    name="RATE_LIMIT_TOKEN_REFRESH"
                    render={({ field }) => (
                      <FormItemLayout
                        layout="flex-row-reverse"
                        label="Rate limit for token refreshes"
                        description="Number of sessions that can be refreshed in a 5 minute interval per IP address"
                      >
                        <Tooltip>
                          <TooltipTrigger asChild>
                            <FormControl>
                              <InputGroup>
                                <FormInputGroupInput
                                  type="number"
                                  min={0}
                                  {...field}
                                  disabled={!canUpdateConfig}
                                />
                                <InputGroupAddon align="inline-end">
                                  <InputGroupText>requests/5 min</InputGroupText>
                                </InputGroupAddon>
                              </InputGroup>
                            </FormControl>
                          </TooltipTrigger>
                          {!canUpdateConfig && (
                            <TooltipContent side="left" className="w-80 p-4">
                              <p className="font-medium">
                                You don't have permission to update this setting
                              </p>
                              <p className="mt-1">
                                You need additional permissions to update auth configuration
                                settings
                              </p>
                            </TooltipContent>
                          )}
                        </Tooltip>
                        {rateLimitForm.watch('RATE_LIMIT_TOKEN_REFRESH') > 0 && (
                          <p className="text-foreground-lighter text-sm mt-2">
                            {rateLimitForm.watch('RATE_LIMIT_TOKEN_REFRESH') * 12} requests per hour
                          </p>
                        )}
                      </FormItemLayout>
                    )}
                  />
                </CardContent>

                <CardContent>
                  <FormField
                    control={rateLimitForm.control}
                    name="RATE_LIMIT_VERIFY"
                    render={({ field }) => (
                      <FormItemLayout
                        layout="flex-row-reverse"
                        label="Rate limit for token verifications"
                        description="Number of OTP/Magic link verifications that can be made in a 5 minute interval per IP address"
                      >
                        <Tooltip>
                          <TooltipTrigger asChild>
                            <FormControl>
                              <InputGroup>
                                <FormInputGroupInput
                                  type="number"
                                  min={0}
                                  {...field}
                                  disabled={!canUpdateConfig}
                                />
                                <InputGroupAddon align="inline-end">
                                  <InputGroupText>requests/5 min</InputGroupText>
                                </InputGroupAddon>
                              </InputGroup>
                            </FormControl>
                          </TooltipTrigger>
                          {!canUpdateConfig && (
                            <TooltipContent side="left" className="w-80 p-4">
                              <p className="font-medium">
                                You don't have permission to update this setting
                              </p>
                              <p className="mt-1">
                                You need additional permissions to update auth configuration
                                settings
                              </p>
                            </TooltipContent>
                          )}
                        </Tooltip>
                        {rateLimitForm.watch('RATE_LIMIT_VERIFY') > 0 && (
                          <p className="text-foreground-lighter text-sm mt-2">
                            {rateLimitForm.watch('RATE_LIMIT_VERIFY') * 12} requests per hour
                          </p>
                        )}
                      </FormItemLayout>
                    )}
                  />
                </CardContent>

                <CardContent>
                  <FormField
                    control={rateLimitForm.control}
                    name="RATE_LIMIT_ANONYMOUS_USERS"
                    render={({ field }) => (
                      <FormItemLayout
                        layout="flex-row-reverse"
                        label="Rate limit for anonymous users"
                        description="Number of anonymous sign-ins that can be made per hour per IP address"
                      >
                        <Tooltip>
                          <TooltipTrigger asChild>
                            <FormControl>
                              <InputGroup>
                                <FormInputGroupInput
                                  type="number"
                                  min={0}
                                  {...field}
                                  disabled={!canUpdateConfig || !canUpdateAnonymousUsersRateLimit}
                                />
                                <InputGroupAddon align="inline-end">
                                  <InputGroupText>requests/h</InputGroupText>
                                </InputGroupAddon>
                              </InputGroup>
                            </FormControl>
                          </TooltipTrigger>
                          {!canUpdateConfig || !canUpdateAnonymousUsersRateLimit ? (
                            <TooltipContent side="left" className="w-80 p-4">
                              <p className="font-medium">
                                Anonymous sign-ins are not enabled for your project. Enable them to
                                control this rate limit.
                              </p>
                              <div className="mt-3">
                                <Button asChild type="default" size="tiny">
                                  <Link href={`/project/${projectRef}/auth/providers`}>
                                    View auth settings
                                  </Link>
                                </Button>
                              </div>
                            </TooltipContent>
                          ) : null}
                        </Tooltip>
                      </FormItemLayout>
                    )}
                  />
                </CardContent>

                <CardContent>
                  <FormField
                    control={rateLimitForm.control}
                    name="RATE_LIMIT_OTP"
                    render={({ field }) => (
                      <FormItemLayout
                        layout="flex-row-reverse"
                        label="Rate limit for sign-ups and sign-ins"
                        description="Number of sign-up and sign-in requests that can be made in a 5 minute interval per IP address (excludes anonymous users)"
                      >
                        <Tooltip>
                          <TooltipTrigger asChild>
                            <FormControl>
                              <InputGroup>
                                <FormInputGroupInput
                                  type="number"
                                  min={0}
                                  {...field}
                                  disabled={!canUpdateConfig}
                                />
                                <InputGroupAddon align="inline-end">
                                  <InputGroupText>requests/5 min</InputGroupText>
                                </InputGroupAddon>
                              </InputGroup>
                            </FormControl>
                          </TooltipTrigger>
                          {!canUpdateConfig && (
                            <TooltipContent side="left" className="w-80 p-4">
                              <p className="font-medium">
                                You don't have permission to update this setting
                              </p>
                              <p className="mt-1">
                                You need additional permissions to update auth configuration
                                settings
                              </p>
                            </TooltipContent>
                          )}
                        </Tooltip>
                        {rateLimitForm.watch('RATE_LIMIT_OTP') > 0 && (
                          <p className="text-foreground-lighter text-sm mt-2">
                            {rateLimitForm.watch('RATE_LIMIT_OTP') * 12} requests per hour
                          </p>
                        )}
                      </FormItemLayout>
                    )}
                  />
                </CardContent>

                <CardContent>
                  <FormField
                    control={rateLimitForm.control}
                    name="RATE_LIMIT_WEB3"
                    render={({ field }) => (
                      <FormItemLayout
                        layout="flex-row-reverse"
                        label="Rate limit for Web3 sign-ups and sign-ins"
                        description="Number of Web3 sign-up or sign-in requests that can be made per IP address in 5 minutes"
                      >
                        <Tooltip>
                          <TooltipTrigger asChild>
                            <FormControl>
                              <InputGroup>
                                <FormInputGroupInput
                                  type="number"
                                  min={0}
                                  {...field}
                                  disabled={!canUpdateConfig || !canUpdateWeb3RateLimit}
                                />
                                <InputGroupAddon align="inline-end">
                                  <InputGroupText>requests/5 min</InputGroupText>
                                </InputGroupAddon>
                              </InputGroup>
                            </FormControl>
                          </TooltipTrigger>
                          {!canUpdateConfig || !canUpdateWeb3RateLimit ? (
                            <TooltipContent side="left" className="w-80 p-4">
                              <p className="font-medium">
                                Web3 auth provider is not enabled for this project. Enable it to
                                control this rate limit.
                              </p>
                              <div className="mt-3">
                                <Button asChild type="default" size="tiny">
                                  <Link href={`/project/${projectRef}/auth/providers`}>
                                    View Auth provider settings
                                  </Link>
                                </Button>
                              </div>
                            </TooltipContent>
                          ) : null}
                        </Tooltip>
                      </FormItemLayout>
                    )}
                  />
                </CardContent>

                <CardFooter className="justify-end space-x-2">
                  {rateLimitForm.formState.isDirty && (
                    <Button type="default" onClick={() => rateLimitForm.reset()}>
                      Cancel
                    </Button>
                  )}
                  <Button
                    type="primary"
                    htmlType="submit"
                    disabled={
                      !canUpdateConfig || isUpdatingConfig || !rateLimitForm.formState.isDirty
                    }
                    loading={isUpdatingConfig}
                  >
                    Save changes
                  </Button>
                </CardFooter>
              </Card>
            </form>
          </Form>
        </PageSectionContent>
      </PageSection>

      <PageSection>
        <PageSectionMeta>
          <PageSectionSummary>
            <PageSectionTitle>IP Address Forwarding</PageSectionTitle>
            <PageSectionDescription>
              Control how Auth determines source IP address for rate limiting.
            </PageSectionDescription>
          </PageSectionSummary>
        </PageSectionMeta>
        <PageSectionContent>
          <Form {...ipForwardingForm}>
            <form onSubmit={ipForwardingForm.handleSubmit(onSubmitIPForwardingForm)}>
              <Card>
                <CardContent>
                  <FormField
                    control={ipForwardingForm.control}
                    name="SECURITY_SB_FORWARDED_FOR_ENABLED"
                    render={({ field }) => (
                      <FormItemLayout
                        layout="flex-row-reverse"
                        label="Enable IP address forwarding"
                        description=<>
                          Clients can forward end-user IP addresses to Auth for rate limiting when
                          using secret API keys.{' '}
                          <InlineLink
                            href={`${DOCS_URL}/guides/auth/rate-limits#ip-address-forwarding`}
                          >
                            Learn more
                          </InlineLink>
                        </>
                      >
                        <FormControl>
                          <Switch
                            checked={field.value}
                            onCheckedChange={(value) => field.onChange(value)}
                            disabled={!canUpdateConfig}
                          />
                        </FormControl>
                      </FormItemLayout>
                    )}
                  />
                </CardContent>
                <CardFooter className="justify-end space-x-2">
                  {ipForwardingForm.formState.isDirty && (
                    <Button type="default" onClick={() => ipForwardingForm.reset()}>
                      Cancel
                    </Button>
                  )}
                  <Button
                    type="primary"
                    htmlType="submit"
                    disabled={
                      !canUpdateConfig || isUpdatingConfig || !ipForwardingForm.formState.isDirty
                    }
                    loading={isUpdatingConfig}
                  >
                    Save changes
                  </Button>
                </CardFooter>
              </Card>
            </form>
          </Form>
        </PageSectionContent>
      </PageSection>
    </>
  )
}