import { useEffect } from 'react'
import * as z from 'zod'
import { useForm } from 'react-hook-form'
import { zodResolver } from '@hookform/resolvers/zod'
import { useTranslation } from 'react-i18next'
import { Button } from '@/components/ui/button'
import {
  Form,
  FormControl,
  FormDescription,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from '@/components/ui/form'
import { Input } from '@/components/ui/input'
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select'
import { Switch } from '@/components/ui/switch'
import { SettingsSection } from '../components/settings-section'
import { useUpdateOption } from '../hooks/use-update-option'

const dataDashboardSchema = z.object({
  DataExportEnabled: z.boolean(),
  DataExportInterval: z.number().int().min(1).max(1440),
  DataExportDefaultTime: z.enum(['hour', 'day', 'week']),
})

type DataDashboardFormValues = z.infer<typeof dataDashboardSchema>

type DashboardSectionProps = {
  defaultValues: DataDashboardFormValues
}

const granularityOptions = [
  { label: 'Hour', value: 'hour' },
  { label: 'Day', value: 'day' },
  { label: 'Week', value: 'week' },
]

export function DashboardSection({ defaultValues }: DashboardSectionProps) {
  const { t } = useTranslation()
  const updateOption = useUpdateOption()

  const form = useForm<DataDashboardFormValues>({
    resolver: zodResolver(dataDashboardSchema),
    defaultValues,
  })

  useEffect(() => {
    form.reset(defaultValues)
  }, [defaultValues, form])

  const onSubmit = async (values: DataDashboardFormValues) => {
    const updates = Object.entries(values).filter(
      ([key, value]) =>
        value !== defaultValues[key as keyof DataDashboardFormValues]
    )

    for (const [key, value] of updates) {
      await updateOption.mutateAsync({ key, value })
    }
  }

  const isEnabled = form.watch('DataExportEnabled')

  return (
    <SettingsSection
      title={t('Data Dashboard')}
      description={t('Configure experimental data export for the dashboard')}
    >
      <Form {...form}>
        <form onSubmit={form.handleSubmit(onSubmit)} className='space-y-6'>
          <FormField
            control={form.control}
            name='DataExportEnabled'
            render={({ field }) => (
              <FormItem className='flex flex-row items-center justify-between rounded-lg border p-4'>
                <div className='space-y-0.5'>
                  <FormLabel className='text-base'>
                    {t('Enable Data Dashboard')}
                  </FormLabel>
                </div>
                <FormControl>
                  <Switch
                    checked={field.value}
                    onCheckedChange={field.onChange}
                  />
                </FormControl>
              </FormItem>
            )}
          />

          <div className='grid gap-6 sm:grid-cols-2'>
            <FormField
              control={form.control}
              name='DataExportInterval'
              render={({ field }) => (
                <FormItem>
                  <FormLabel>{t('Refresh interval (minutes)')}</FormLabel>
                  <FormControl>
                    <Input
                      type='number'
                      min={1}
                      max={1440}
                      step={1}
                      disabled={!isEnabled}
                      value={field.value}
                      onChange={(e) => field.onChange(e.target.valueAsNumber)}
                    />
                  </FormControl>
                  <FormDescription>
                    {t('Keep this above 1 minute to avoid heavy database load')}
                  </FormDescription>
                  <FormMessage />
                </FormItem>
              )}
            />

            <FormField
              control={form.control}
              name='DataExportDefaultTime'
              render={({ field }) => (
                <FormItem>
                  <FormLabel>{t('Default time granularity')}</FormLabel>
                  <Select
                    onValueChange={field.onChange}
                    value={field.value}
                    disabled={!isEnabled}
                  >
                    <FormControl>
                      <SelectTrigger>
                        <SelectValue placeholder={t('Select granularity')} />
                      </SelectTrigger>
                    </FormControl>
                    <SelectContent>
                      {granularityOptions.map((option) => (
                        <SelectItem key={option.value} value={option.value}>
                          {option.label}
                        </SelectItem>
                      ))}
                    </SelectContent>
                  </Select>
                  <FormDescription>
                    {t(
                      'UI granularity only &mdash; data is still aggregated hourly'
                    )}
                  </FormDescription>
                  <FormMessage />
                </FormItem>
              )}
            />
          </div>

          <Button type='submit' disabled={updateOption.isPending}>
            {updateOption.isPending ? t('Saving...') : t('Save Changes')}
          </Button>
        </form>
      </Form>
    </SettingsSection>
  )
}