import React from 'react'
import {View} from 'react-native'
import {ComAtprotoLabelDefs, ComAtprotoModerationDefs} from '@atproto/api'
import {msg, Trans} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import {useMutation} from '@tanstack/react-query'

import {useLabelInfo} from '#/lib/moderation/useLabelInfo'
import {makeProfileLink} from '#/lib/routes/links'
import {useGate} from '#/lib/statsig/statsig'
import {sanitizeHandle} from '#/lib/strings/handles'
import {logger} from '#/logger'
import {useAgent, useSession} from '#/state/session'
import * as Toast from '#/view/com/util/Toast'
import {atoms as a, useBreakpoints, useTheme} from '#/alf'
import {Button, ButtonIcon, ButtonText} from '#/components/Button'
import * as Dialog from '#/components/Dialog'
import {InlineLinkText} from '#/components/Link'
import {Text} from '#/components/Typography'
import {Divider} from '../Divider'
import {Loader} from '../Loader'
export {useDialogControl as useLabelsOnMeDialogControl} from '#/components/Dialog'

type Subject =
  | {
      uri: string
      cid: string
    }
  | {
      did: string
    }

export interface LabelsOnMeDialogProps {
  control: Dialog.DialogOuterProps['control']
  subject: Subject
  labels: ComAtprotoLabelDefs.Label[]
}

export function LabelsOnMeDialog(props: LabelsOnMeDialogProps) {
  return (
    <Dialog.Outer control={props.control}>
      <Dialog.Handle />

      <LabelsOnMeDialogInner {...props} />
    </Dialog.Outer>
  )
}

function LabelsOnMeDialogInner(props: LabelsOnMeDialogProps) {
  const {_} = useLingui()
  const {currentAccount} = useSession()
  const [appealingLabel, setAppealingLabel] = React.useState<
    ComAtprotoLabelDefs.Label | undefined
  >(undefined)
  const {subject, labels} = props
  const isAccount = 'did' in subject
  const containsSelfLabel = React.useMemo(
    () => labels.some(l => l.src === currentAccount?.did),
    [currentAccount?.did, labels],
  )

  return (
    <Dialog.ScrollableInner
      label={
        isAccount
          ? _(msg`The following labels were applied to your account.`)
          : _(msg`The following labels were applied to your content.`)
      }>
      {appealingLabel ? (
        <AppealForm
          label={appealingLabel}
          subject={subject}
          control={props.control}
          onPressBack={() => setAppealingLabel(undefined)}
        />
      ) : (
        <>
          <Text style={[a.text_2xl, a.font_bold, a.pb_xs, a.leading_tight]}>
            {isAccount ? (
              <Trans>Labels on your account</Trans>
            ) : (
              <Trans>Labels on your content</Trans>
            )}
          </Text>
          <Text style={[a.text_md, a.leading_snug]}>
            {containsSelfLabel ? (
              <Trans>
                You may appeal non-self labels if you feel they were placed in
                error.
              </Trans>
            ) : (
              <Trans>
                You may appeal these labels if you feel they were placed in
                error.
              </Trans>
            )}
          </Text>

          <View style={[a.py_lg, a.gap_md]}>
            {labels.map(label => (
              <Label
                key={`${label.val}-${label.src}`}
                label={label}
                isSelfLabel={label.src === currentAccount?.did}
                control={props.control}
                onPressAppeal={setAppealingLabel}
              />
            ))}
          </View>
        </>
      )}
      <Dialog.Close />
    </Dialog.ScrollableInner>
  )
}

function Label({
  label,
  isSelfLabel,
  control,
  onPressAppeal,
}: {
  label: ComAtprotoLabelDefs.Label
  isSelfLabel: boolean
  control: Dialog.DialogOuterProps['control']
  onPressAppeal: (label: ComAtprotoLabelDefs.Label) => void
}) {
  const t = useTheme()
  const {_} = useLingui()
  const {labeler, strings} = useLabelInfo(label)
  const sourceName = labeler
    ? sanitizeHandle(labeler.creator.handle, '@')
    : label.src
  return (
    <View
      style={[
        a.border,
        t.atoms.border_contrast_low,
        a.rounded_sm,
        a.overflow_hidden,
      ]}>
      <View style={[a.p_md, a.gap_sm, a.flex_row]}>
        <View style={[a.flex_1, a.gap_xs]}>
          <Text style={[a.font_bold, a.text_md]}>{strings.name}</Text>
          <Text style={[t.atoms.text_contrast_medium, a.leading_snug]}>
            {strings.description}
          </Text>
        </View>
        {!isSelfLabel && (
          <View>
            <Button
              variant="solid"
              color="secondary"
              size="small"
              label={_(msg`Appeal`)}
              onPress={() => onPressAppeal(label)}>
              <ButtonText>
                <Trans>Appeal</Trans>
              </ButtonText>
            </Button>
          </View>
        )}
      </View>

      <Divider />

      <View style={[a.px_md, a.py_sm, t.atoms.bg_contrast_25]}>
        <Text style={[t.atoms.text_contrast_medium]}>
          {isSelfLabel ? (
            <Trans>This label was applied by you.</Trans>
          ) : (
            <Trans>
              Source:{' '}
              <InlineLinkText
                label={sourceName}
                to={makeProfileLink(
                  labeler ? labeler.creator : {did: label.src, handle: ''},
                )}
                onPress={() => control.close()}>
                {sourceName}
              </InlineLinkText>
            </Trans>
          )}
        </Text>
      </View>
    </View>
  )
}

function AppealForm({
  label,
  subject,
  control,
  onPressBack,
}: {
  label: ComAtprotoLabelDefs.Label
  subject: Subject
  control: Dialog.DialogOuterProps['control']
  onPressBack: () => void
}) {
  const {_} = useLingui()
  const {labeler, strings} = useLabelInfo(label)
  const {gtMobile} = useBreakpoints()
  const [details, setDetails] = React.useState('')
  const isAccountReport = 'did' in subject
  const agent = useAgent()
  const gate = useGate()
  const sourceName = labeler
    ? sanitizeHandle(labeler.creator.handle, '@')
    : label.src

  const {mutate, isPending} = useMutation({
    mutationFn: async () => {
      const $type = !isAccountReport
        ? 'com.atproto.repo.strongRef'
        : 'com.atproto.admin.defs#repoRef'
      if (gate('session_withproxy_fix')) {
        await agent.createModerationReport(
          {
            reasonType: ComAtprotoModerationDefs.REASONAPPEAL,
            subject: {
              $type,
              ...subject,
            },
            reason: details,
          },
          {
            encoding: 'application/json',
            headers: {
              'atproto-proxy': `${label.src}#atproto_labeler`,
            },
          },
        )
      } else {
        await agent
          .withProxy('atproto_labeler', label.src)
          .createModerationReport({
            reasonType: ComAtprotoModerationDefs.REASONAPPEAL,
            subject: {
              $type,
              ...subject,
            },
            reason: details,
          })
      }
    },
    onError: err => {
      logger.error('Failed to submit label appeal', {message: err})
      Toast.show(_(msg`Failed to submit appeal, please try again.`), 'xmark')
    },
    onSuccess: () => {
      control.close()
      Toast.show(_(msg`Appeal submitted`))
    },
  })

  const onSubmit = React.useCallback(() => mutate(), [mutate])

  return (
    <>
      <Text style={[a.text_2xl, a.font_bold, a.pb_xs, a.leading_tight]}>
        <Trans>Appeal "{strings.name}" label</Trans>
      </Text>
      <Text style={[a.text_md, a.leading_snug]}>
        <Trans>
          This appeal will be sent to{' '}
          <InlineLinkText
            label={sourceName}
            to={makeProfileLink(
              labeler ? labeler.creator : {did: label.src, handle: ''},
            )}
            onPress={() => control.close()}
            style={[a.text_md, a.leading_snug]}>
            {sourceName}
          </InlineLinkText>
          .
        </Trans>
      </Text>
      <View style={[a.my_md]}>
        <Dialog.Input
          label={_(msg`Text input field`)}
          placeholder={_(
            msg`Please explain why you think this label was incorrectly applied by ${
              labeler ? sanitizeHandle(labeler.creator.handle, '@') : label.src
            }`,
          )}
          value={details}
          onChangeText={setDetails}
          autoFocus={true}
          numberOfLines={3}
          multiline
          maxLength={300}
        />
      </View>

      <View
        style={
          gtMobile
            ? [a.flex_row, a.justify_between]
            : [{flexDirection: 'column-reverse'}, a.gap_sm]
        }>
        <Button
          testID="backBtn"
          variant="solid"
          color="secondary"
          size="medium"
          onPress={onPressBack}
          label={_(msg`Back`)}>
          <ButtonText>{_(msg`Back`)}</ButtonText>
        </Button>
        <Button
          testID="submitBtn"
          variant="solid"
          color="primary"
          size="medium"
          onPress={onSubmit}
          label={_(msg`Submit`)}>
          <ButtonText>{_(msg`Submit`)}</ButtonText>
          {isPending && <ButtonIcon icon={Loader} />}
        </Button>
      </View>
    </>
  )
}