'use client'
import {z} from 'zod'
import {zodResolver} from '@hookform/resolvers/zod'
import {Form, FormField, FormLabel} from '@/components/ui/form'
import {RadioGroup, RadioGroupItem} from '@/components/ui/radio-group'
import {Input} from '@/components/ui/input'
import {Select, SelectContent, SelectItem, SelectSeparator, SelectTrigger, SelectValue} from '@/components/ui/select'
import {Button} from '@/components/ui/button'
import {useForm} from 'react-hook-form'
import {Alert, AlertTitle} from '@/components/ui/alert'
import {Box, CircleAlert, CopyIcon, ExternalLinkIcon, Loader, Timer} from 'lucide-react'
import {useEffect, useMemo, useRef, useState} from 'react'
import {useStatus} from '@/lib/states'
import {allResource} from '@/actions/resource'
import {Resource, name} from '@/lib/models'
import {format, intlFormatDistance} from 'date-fns'
import {toast} from 'sonner'
import {merge} from '@/lib/utils'
import {Combobox} from '@/components/ui/combobox'
import cities from './_assets/cities.json'

type ExtractProps = {
  className?: string
}

export default function Extract(props: ExtractProps) {
  const [resources, setResources] = useState<Resource[]>([])
  const [status, setStatus] = useStatus()

  const schema = z.object({
    resource: z.number({required_error: '请选择套餐'}),
    prov: z.string().optional(),
    city: z.string().optional(),
    regionType: z.enum(['unlimited', 'specific']).default('unlimited'),
    isp: z.enum(['all', '1', '2', '3'], {required_error: '请选择运营商'}),
    proto: z.enum(['all', '1', '2', '3'], {required_error: '请选择协议'}),
    authType: z.enum(['1', '2'], {required_error: '请选择认证方式'}),
    distinct: z.enum(['1', '0'], {required_error: '请选择去重选项'}),
    format: z.enum(['text', 'json'], {required_error: '请选择导出格式'}),
    separator: z.string({required_error: '请选择分隔符'}),
    breaker: z.string({required_error: '请选择换行符'}),
    count: z.number({required_error: '请输入有效的数量'}).min(1),
  })

  type Schema = z.infer<typeof schema>

  const form = useForm<Schema>({
    resolver: zodResolver(schema),
    defaultValues: {
      regionType: 'unlimited',
      isp: 'all',
      proto: 'all',
      authType: '1',
      count: 1,
      distinct: '1',
      format: 'text',
      breaker: '13,10',
      separator: '124',
    },
  })

  const regionType = form.watch('regionType')

  const resource = form.watch('resource')
  const prov = form.watch('prov')
  const city = form.watch('city')
  const isp = form.watch('isp')
  const proto = form.watch('proto')
  const authType = form.watch('authType')
  const distinct = form.watch('distinct')
  const formatType = form.watch('format')
  const separator = form.watch('separator')
  const breaker = form.watch('breaker')
  const count = form.watch('count')

  const params = useMemo(() => {
    const sp = new URLSearchParams()
    if (resource) sp.set('i', String(resource))
    if (authType) sp.set('t', authType)
    if (proto != 'all') sp.set('x', proto)

    if (prov) sp.set('a', prov)
    if (city) sp.set('b', city)

    if (isp != 'all') sp.set('s', isp)
    sp.set('d', distinct)
    sp.set('rt', formatType)
    sp.set('rs', separator)
    sp.set('rb', breaker)
    sp.set('n', String(count))

    return `/proxies?${sp.toString()}`
  }, [resource, authType, proto, isp, distinct, formatType, separator, breaker, count, prov, city])

  const type = useRef<'copy' | 'open'>('open')
  const onSubmit = async (values: z.infer<typeof schema>) => {
    switch (type.current) {
    case 'copy':
      const url = new URL(window.location.href).origin
      const text = `${url}${params}`

      // 使用 clipboard API 复制链接
      let copied = false
      try {
        await navigator.clipboard.writeText(text)
        copied = true
      }
      catch (e) {
        console.log('剪贴板 API 调用失败，尝试备选方案')
      }

      // 使用 document.execCommand 作为备选方案
      if (!copied) {
        const textarea = document.createElement('textarea')
        textarea.value = text
        document.body.appendChild(textarea)
        textarea.select()
        document.execCommand('copy')
        document.body.removeChild(textarea)
      }

      toast.success('链接已复制到剪贴板')
      break
    case 'open':
      window.open(params, '_blank')
      break
    }
  }

  const getResources = async () => {
    setStatus('load')
    try {
      const resp = await allResource()
      if (!resp.success) {
        throw new Error('Unable to fetch packages.')
      }
      setResources(resp.data)
      setStatus('done')
    }
    catch (error) {
      console.error('Error fetching packages:', error)
      setStatus('fail')
    }
  }

  useEffect(() => {
    getResources().then()
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [])

  // ======================
  // render
  // ======================

  return (
    <Form
      form={form}
      onSubmit={onSubmit}
      onError={errors => {
        const desc: (string | undefined)[] = []
        Object.entries(errors).forEach(([field, error]) => {
          if (error.message) {
            desc.push(error.message)
          }
        })
        toast.error('请完成填写：', {
          description: desc.map((msg, i) => (
            <span key={i}>- {msg}</span>
          )),
        })
      }}
      className={merge(
        `bg-white flex flex-col gap-4 rounded-md`,
        props.className,
      )}
    >
      <Alert variant={`warn`}>
        <CircleAlert/>
        <AlertTitle>提取IP前需要将本机IP添加到白名单后才可使用</AlertTitle>
      </Alert>

      <div className={`flex flex-col gap-4`}>
        {/* 选择套餐 */}
        <div className="flex items-center">
          <FormField name="resource" label={`选择套餐`}>
            {({field}) => (
              <Select
                value={field.value ? String(field.value) : undefined}
                onValueChange={value => field.onChange(Number(value))}
              >
                <SelectTrigger className={`min-h-10 h-auto w-84`}>
                  <SelectValue placeholder={`选择套餐`}/>
                </SelectTrigger>
                <SelectContent>
                  {status === 'load' ? (
                    <div className={`p-4 flex gap-1 items-center`}>
                      <Loader className={`animate-spin`} size={20}/>
                      <span>加载中...</span>
                    </div>
                  ) : resources.length === 0 ? (
                    <div className={`p-4 flex gap-1 items-center`}>
                      <Loader className={`animate-spin`} size={20}/>
                      <span>暂无可用套餐</span>
                    </div>
                  ) : resources.map((resource, i) => (<>
                    <SelectItem
                      key={`${resource.id}`} value={String(resource.id)} className={`p-3`}>
                      <div className={`flex flex-col gap-2 w-72`}>
                        {resource.type === 1 && resource.short.type === 1 && (<>
                          <div className={`flex gap-2 items-center bg-green-50 w-fit px-2 py-1 rounded-md text-sm`}>
                            <Timer size={20}/>
                            <span>{name(resource)}</span>
                          </div>
                          <div className={`flex justify-between gap-2 text-xs text-weak`}>
                            <span>到期时间：{format(resource.short.expire, 'yyyy-MM-dd HH:mm')}</span>
                            <span>{intlFormatDistance(resource.short.expire, new Date())}</span>
                          </div>
                        </>)}
                        {resource.type === 1 && resource.short.type === 2 && (<>
                          <div className={`flex gap-2 items-center bg-blue-50 w-fit px-2 py-1 rounded-md text-sm`}>
                            <Box size={20}/>
                            <span>{name(resource)}</span>
                          </div>
                          <div className={`flex justify-between gap-2 text-xs text-weak`}>
                            <span>提取数量：{resource.short.used} / {resource.short.quota}</span>
                            <span>剩余 {resource.short.quota - resource.short.used}</span>
                          </div>
                        </>)}
                      </div>
                    </SelectItem>
                    {i < resources.length - 1 && <SelectSeparator className={`m-2`}/>}
                  </>))
                  }
                </SelectContent>
              </Select>
            )}
          </FormField>
        </div>

        {/* 地区筛选 */}
        <div className="flex flex-col gap-4">
          <FormField name="regionType" label={`地区筛选`}>
            {({id, field}) => (
              <RadioGroup
                onValueChange={(e) => {
                  field.onChange(e)
                  if (e === 'unlimited') {
                    form.setValue('prov', '')
                    form.setValue('city', '')
                  }
                }}
                defaultValue={field.value}
                className="flex gap-4"
              >
                <FormLabel htmlFor={`${id}-v-unlimited`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="unlimited" id={`${id}-v-unlimited`} className="mr-2"/>
                  <span>不限地区</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-specific`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="specific" id={`${id}-v-specific`} className="mr-2"/>
                  <span>指定地区</span>
                </FormLabel>
              </RadioGroup>
            )}
          </FormField>

          {regionType === 'specific' && (
            <Combobox
              className={`w-84`}
              placeholder={`请选择地区`}
              options={cities.options}
              value={[prov || '', city || '']}
              onChange={value => {
                form.setValue('prov', value[0])
                form.setValue('city', value[1])
              }}
            />
          )}
        </div>

        {/* 运营商筛选 */}
        <div className="flex items-center">
          <FormField name="isp" label={`运营商筛选`}>
            {({id, field}) => (
              <RadioGroup
                onValueChange={field.onChange}
                defaultValue={field.value}
                className="flex gap-4">
                <FormLabel htmlFor={`${id}-v-all`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="all" id={`${id}-v-all`}/>
                  <span>不限</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-telecom`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="1" id={`${id}-v-telecom`}/>
                  <span>电信</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-mobile`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="2" id={`${id}-v-mobile`}/>
                  <span>联通</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-unicom`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="3" id={`${id}-v-unicom`}/>
                  <span>移动</span>
                </FormLabel>
              </RadioGroup>
            )}
          </FormField>
        </div>

        {/* 协议类型 */}
        <div className="flex items-center">
          <FormField name="proto" label={`协议类型`}>
            {({id, field}) => (
              <RadioGroup
                onValueChange={field.onChange}
                defaultValue={field.value}
                className="flex gap-4">
                <FormLabel htmlFor={`${id}-v-all`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="all" id={`${id}-v-all`} className="mr-2"/>
                  <span>不限</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-http`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="1" id={`${id}-v-http`} className="mr-2"/>
                  <span>HTTP</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-https`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="2" id={`${id}-v-https`} className="mr-2"/>
                  <span>HTTPS</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-socks5`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="3" id={`${id}-v-socks5`} className="mr-2"/>
                  <span>SOCKS5</span>
                </FormLabel>
              </RadioGroup>
            )}
          </FormField>
        </div>

        {/* 认证方式 */}
        <div className="flex items-center">
          <FormField name="authType" label={`协议类型`}>
            {({id, field}) => (
              <RadioGroup
                onValueChange={field.onChange}
                defaultValue={field.value}
                className="flex gap-4">
                <FormLabel htmlFor={`${id}-v-http`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="1" id={`${id}-v-http`} className="mr-2"/>
                  <span>白名单</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-https`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="2" id={`${id}-v-https`} className="mr-2"/>
                  <span>密码</span>
                </FormLabel>
              </RadioGroup>
            )}
          </FormField>
        </div>

        {/* 去重选项 */}
        <div className="flex items-center">
          <FormField name="distinct" label={`去重选项`}>
            {({id, field}) => (
              <RadioGroup
                onValueChange={field.onChange}
                defaultValue={field.value}
                className="flex gap-4">
                <FormLabel htmlFor={`${id}-v-true`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="1" id={`${id}-v-true`} className="mr-2"/>
                  <span>去重</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-false`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="0" id={`${id}-v-false`} className="mr-2"/>
                  <span>不去重</span>
                </FormLabel>
              </RadioGroup>
            )}
          </FormField>
        </div>

        {/* 导出格式 */}
        <div className="flex items-center">
          <FormField name="format" label={`导出格式`}>
            {({id, field}) => (
              <RadioGroup
                onValueChange={field.onChange}
                defaultValue={field.value}
                className="flex gap-4"
              >
                <FormLabel htmlFor={`${id}-v-txt`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="text" id={`${id}-v-txt`} className="mr-2"/>
                  <span>TXT 格式</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-json`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="json" id={`${id}-v-json`} className="mr-2"/>
                  <span>JSON 格式</span>
                </FormLabel>
              </RadioGroup>
            )}
          </FormField>
        </div>

        {/* 分隔符 */}
        <div className="flex items-center">
          <FormField name="separator" label={`分隔符`}>
            {({id, field}) => (
              <RadioGroup
                onValueChange={field.onChange}
                defaultValue={field.value}
                className="flex gap-4">
                <FormLabel htmlFor={`${id}-v-comma`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="124" id={`${id}-v-comma`} className="mr-2"/>
                  <span>竖线 ( | )</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-semicolon`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="58" id={`${id}-v-semicolon`} className="mr-2"/>
                  <span>冒号 ( : )</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-space`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="9" id={`${id}-v-space`} className="mr-2"/>
                  <span>制表符 ( \t )</span>
                </FormLabel>
              </RadioGroup>
            )}
          </FormField>
        </div>

        {/* 换行符 */}
        <div className="flex items-center">
          <FormField name="breaker" label={`换行符`}>
            {({id, field}) => (
              <RadioGroup
                onValueChange={field.onChange}
                defaultValue={field.value}
                className="flex gap-4">
                <FormLabel htmlFor={`${id}-v-newline2`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="13,10" id={`${id}-v-newline2`} className="mr-2"/>
                  <span>回车换行 ( \r\n )</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-newline`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="10" id={`${id}-v-newline`} className="mr-2"/>
                  <span>换行 ( \n )</span>
                </FormLabel>
                <FormLabel htmlFor={`${id}-v-newline3`} className={`px-3 h-10 border rounded-md flex items-center w-40 text-sm`}>
                  <RadioGroupItem value="13" id={`${id}-v-newline3`} className="mr-2"/>
                  <span>回车 ( \r )</span>
                </FormLabel>
              </RadioGroup>
            )}
          </FormField>
        </div>

        {/* 提取数量 */}
        <div className="flex items-center">
          <FormField name="count" label={`提取数量`}>
            {({id, field}) => (
              <Input
                {...field}
                id={id}
                type="number"
                onChange={e => field.onChange(Number(e.target.value))}
                className="h-10 w-84"
                placeholder="输入提取数量"
              />
            )}
          </FormField>
        </div>
      </div>

      <div className={merge(
        `flex flex-col gap-4 sticky bottom-0 bg-muted p-4`,
        `rounded-lg`,
      )}>
        {/* 展示链接地址 */}
        <div className={`bg-neutral-900 text-white p-4 rounded-md break-all`}>
          {params}
        </div>

        {/* 操作 */}
        <div className="flex gap-4">
          <Button
            type="submit"
            onClick={() => type.current = 'copy'}
          >
            <CopyIcon/>
            <span>复制链接</span>
          </Button>
          <Button
            type="submit"
            onClick={() => type.current = 'open'}
          >
            <ExternalLinkIcon/>
            <span>打开链接</span>
          </Button>
        </div>
      </div>
    </Form>
  )
}