import React from 'react'
import {StyleProp, View, ViewStyle} from 'react-native'
import {AppBskyFeedPostgate} from '@atproto/api'
import {msg, Trans} from '@lingui/macro'
import {useLingui} from '@lingui/react'
import isEqual from 'lodash.isequal'

import {useMyListsQuery} from '#/state/queries/my-lists'
import {
  createPostgateRecord,
  embeddingRules,
} from '#/state/queries/postgate/util'
import {ThreadgateAllowUISetting} from '#/state/queries/threadgate'
import {atoms as a, useTheme} from '#/alf'
import {Button, ButtonIcon, ButtonText} from '#/components/Button'
import * as Dialog from '#/components/Dialog'
import {Divider} from '#/components/Divider'
import {Check_Stroke2_Corner0_Rounded as Check} from '#/components/icons/Check'
import {CircleInfo_Stroke2_Corner0_Rounded as CircleInfo} from '#/components/icons/CircleInfo'
import {Loader} from '#/components/Loader'
import {Text} from '#/components/Typography'

export type Props = {
  onSave: () => void
  isSaving: boolean

  postgate: AppBskyFeedPostgate.Record
  onChangePostgate: (v: AppBskyFeedPostgate.Record) => void

  threadgateAllowUISettings: ThreadgateAllowUISetting[]
  onChangeThreadgateAllowUISettings: (v: ThreadgateAllowUISetting[]) => void

  replySettingsDisabled?: boolean
}

export function PostInteractionSettingsDialog({
  control,
  ...rest
}: Props & {
  control: Dialog.DialogControlProps
}) {
  const {_} = useLingui()
  return (
    <Dialog.Outer control={control}>
      <Dialog.Handle />
      <Dialog.ScrollableInner
        label={_(msg`Edit post interaction settings`)}
        style={[{maxWidth: 500}, a.w_full]}>
        <PostInteractionSettingsDialogInner {...rest} />
        <Dialog.Close />
      </Dialog.ScrollableInner>
    </Dialog.Outer>
  )
}

export function PostInteractionSettingsDialogInner({
  onSave,
  isSaving,
  postgate,
  onChangePostgate,
  threadgateAllowUISettings,
  onChangeThreadgateAllowUISettings,
  replySettingsDisabled,
}: Props) {
  const t = useTheme()
  const {_} = useLingui()
  const control = Dialog.useDialogContext()
  const {data: lists} = useMyListsQuery('curate')

  const onPressAudience = (setting: ThreadgateAllowUISetting) => {
    // remove boolean values
    let newSelected: ThreadgateAllowUISetting[] =
      threadgateAllowUISettings.filter(
        v => v.type !== 'nobody' && v.type !== 'everybody',
      )
    // toggle
    const i = newSelected.findIndex(v => isEqual(v, setting))
    if (i === -1) {
      newSelected.push(setting)
    } else {
      newSelected.splice(i, 1)
    }

    onChangeThreadgateAllowUISettings(newSelected)
  }

  const onChangeEmbeddingRules = React.useCallback(
    (rules: AppBskyFeedPostgate.Record['quotepostRules']) => {
      onChangePostgate(
        createPostgateRecord({
          ...postgate,
          quotepostRules: rules,
        }),
      )
    },
    [postgate, onChangePostgate],
  )

  const noOneCanReply = !!threadgateAllowUISettings.find(
    v => v.type === 'nobody',
  )

  return (
    <View>
      <View style={[a.flex_1, a.gap_md]}>
        <Text style={[a.text_2xl, a.font_bold]}>
          <Trans>Post interaction settings</Trans>
        </Text>

        <View style={[a.gap_lg]}>
          <Text style={[a.text_md]}>
            <Trans>Customize who can engage with this post.</Trans>
          </Text>

          <Divider />

          <View style={[a.gap_sm]}>
            <Text style={[a.font_bold, a.text_lg]}>
              <Trans>Quote settings</Trans>
            </Text>

            <Text style={[a.pt_sm, t.atoms.text_contrast_medium]}>
              <Trans>Allow quote posts from:</Trans>
            </Text>

            <View style={[a.flex_row, a.gap_sm]}>
              <Selectable
                label={_(msg`Everybody`)}
                isSelected={
                  !postgate.quotepostRules ||
                  postgate.quotepostRules?.length === 0
                }
                onPress={() => onChangeEmbeddingRules([])}
                style={{flex: 1}}
              />
              <Selectable
                label={_(msg`Nobody`)}
                isSelected={Boolean(
                  postgate.quotepostRules &&
                    postgate.quotepostRules.find(
                      v => v.$type === embeddingRules.disableRule.$type,
                    ),
                )}
                onPress={() =>
                  onChangeEmbeddingRules([embeddingRules.disableRule])
                }
                style={{flex: 1}}
              />
            </View>
          </View>

          <Divider />

          {replySettingsDisabled && (
            <View
              style={[
                a.px_md,
                a.py_sm,
                a.rounded_sm,
                a.flex_row,
                a.align_center,
                a.gap_sm,
                t.atoms.bg_contrast_25,
              ]}>
              <CircleInfo fill={t.atoms.text_contrast_low.color} />
              <Text style={[a.leading_snug, t.atoms.text_contrast_medium]}>
                <Trans>
                  Reply settings are chosen by the author of the thread
                </Trans>
              </Text>
            </View>
          )}

          <View
            style={[
              a.gap_sm,
              {
                opacity: replySettingsDisabled ? 0.3 : 1,
              },
            ]}>
            <Text style={[a.font_bold, a.text_lg]}>
              <Trans>Reply settings</Trans>
            </Text>

            <Text style={[a.pt_sm, t.atoms.text_contrast_medium]}>
              <Trans>Allow replies from:</Trans>
            </Text>

            <View style={[a.flex_row, a.gap_sm]}>
              <Selectable
                label={_(msg`Everybody`)}
                isSelected={
                  !!threadgateAllowUISettings.find(v => v.type === 'everybody')
                }
                onPress={() =>
                  onChangeThreadgateAllowUISettings([{type: 'everybody'}])
                }
                style={{flex: 1}}
                disabled={replySettingsDisabled}
              />
              <Selectable
                label={_(msg`Nobody`)}
                isSelected={noOneCanReply}
                onPress={() =>
                  onChangeThreadgateAllowUISettings([{type: 'nobody'}])
                }
                style={{flex: 1}}
                disabled={replySettingsDisabled}
              />
            </View>

            {!noOneCanReply && (
              <>
                <Text style={[a.pt_sm, t.atoms.text_contrast_medium]}>
                  <Trans>Or combine these options:</Trans>
                </Text>

                <View style={[a.gap_sm]}>
                  <Selectable
                    label={_(msg`Mentioned users`)}
                    isSelected={
                      !!threadgateAllowUISettings.find(
                        v => v.type === 'mention',
                      )
                    }
                    onPress={() => onPressAudience({type: 'mention'})}
                    disabled={replySettingsDisabled}
                  />
                  <Selectable
                    label={_(msg`Followed users`)}
                    isSelected={
                      !!threadgateAllowUISettings.find(
                        v => v.type === 'following',
                      )
                    }
                    onPress={() => onPressAudience({type: 'following'})}
                    disabled={replySettingsDisabled}
                  />
                  {lists && lists.length > 0
                    ? lists.map(list => (
                        <Selectable
                          key={list.uri}
                          label={_(msg`Users in "${list.name}"`)}
                          isSelected={
                            !!threadgateAllowUISettings.find(
                              v => v.type === 'list' && v.list === list.uri,
                            )
                          }
                          onPress={() =>
                            onPressAudience({type: 'list', list: list.uri})
                          }
                          disabled={replySettingsDisabled}
                        />
                      ))
                    : // No loading states to avoid jumps for the common case (no lists)
                      null}
                </View>
              </>
            )}
          </View>
        </View>
      </View>

      <Button
        label={_(msg`Save`)}
        onPress={onSave}
        onAccessibilityEscape={control.close}
        color="primary"
        size="medium"
        variant="solid"
        style={a.mt_xl}>
        <ButtonText>{_(msg`Save`)}</ButtonText>
        {isSaving && <ButtonIcon icon={Loader} position="right" />}
      </Button>
    </View>
  )
}

function Selectable({
  label,
  isSelected,
  onPress,
  style,
  disabled,
}: {
  label: string
  isSelected: boolean
  onPress: () => void
  style?: StyleProp<ViewStyle>
  disabled?: boolean
}) {
  const t = useTheme()
  return (
    <Button
      disabled={disabled}
      onPress={onPress}
      label={label}
      accessibilityHint="Select this option"
      accessibilityRole="checkbox"
      aria-checked={isSelected}
      accessibilityState={{
        checked: isSelected,
      }}
      style={a.flex_1}>
      {({hovered, focused}) => (
        <View
          style={[
            a.flex_1,
            a.flex_row,
            a.align_center,
            a.justify_between,
            a.rounded_sm,
            a.p_md,
            {height: 40}, // for consistency with checkmark icon visible or not
            t.atoms.bg_contrast_50,
            (hovered || focused) && t.atoms.bg_contrast_100,
            isSelected && {
              backgroundColor: t.palette.primary_100,
            },
            style,
          ]}>
          <Text style={[a.text_sm, isSelected && a.font_semibold]}>
            {label}
          </Text>
          {isSelected ? (
            <Check size="sm" fill={t.palette.primary_500} />
          ) : (
            <View />
          )}
        </View>
      )}
    </Button>
  )
}