"use client"

import * as React from "react"
import { useForm } from "react-hook-form"
import { zodResolver } from "@hookform/resolvers/zod"
import { toast } from "sonner"
import { Plus, Loader2 } from "lucide-react"

import { Button } from "@/components/ui/button"
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
  DialogTrigger,
} from "@/components/ui/dialog"
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 { createCodeGroup } from "@/lib/docu-list-rule/code-groups/service"
import { getProjectLists } from "@/lib/projects/service"
import { z } from "zod"

const createCodeGroupSchema = z.object({
  projectId: z.string().min(1, "프로젝트는 필수입니다."),
  description: z.string().min(1, "Description은 필수입니다."),
  codeFormat: z.string().optional().refine((val) => {
    if (!val) return true; // 빈 값은 허용
    return /^[ANX]*$/.test(val);
  }, "Code Format은 A(영어 대문자), N(숫자), X(영어/숫자)만 입력 가능합니다."),
  controlType: z.string().min(1, "Control Type은 필수입니다."),
})

type CreateCodeGroupFormValues = z.infer<typeof createCodeGroupSchema>

interface CodeGroupsAddDialogProps {
  onSuccess?: () => void
}

export function CodeGroupsAddDialog({ onSuccess }: CodeGroupsAddDialogProps) {
  const [open, setOpen] = React.useState(false)
  const [isLoading, setIsLoading] = React.useState(false)
  const [projects, setProjects] = React.useState<Array<{ id: number; code: string; name: string }>>([])

  const form = useForm<CreateCodeGroupFormValues>({
    resolver: zodResolver(createCodeGroupSchema),
    defaultValues: {
      projectId: "",
      description: "",
      codeFormat: "",
      controlType: "",
    },
  })

  // 프로젝트 목록 로드
  React.useEffect(() => {
    if (open) {
      const loadProjects = async () => {
        try {
          const result = await getProjectLists({ 
            page: 1, 
            perPage: 1000,
            search: "",
            sort: [],
            filters: [],
            joinOperator: "and",
            flags: []
          })
          if (result.data) {
            setProjects(result.data)
          }
        } catch (error) {
          console.error("Failed to load projects:", error)
          toast.error("프로젝트 목록을 불러오는데 실패했습니다.")
        }
      }
      loadProjects()
    }
  }, [open])

  // Code Format을 기반으로 정규식 자동 생성 함수
  const generateExpression = (codeFormat: string): string => {
    if (!codeFormat) return ''
    
    let expression = '^'
    let currentChar = codeFormat[0]
    let count = 1
    
    for (let i = 1; i < codeFormat.length; i++) {
      if (codeFormat[i] === currentChar) {
        count++
      } else {
        // 이전 문자에 대한 정규식 추가
        if (currentChar === 'A') {
          expression += `[A-Z]{${count}}`
        } else if (currentChar === 'N') {
          expression += `[0-9]{${count}}`
        } else if (currentChar === 'X') {
          expression += `[A-Z0-9]{${count}}`
        }
        currentChar = codeFormat[i]
        count = 1
      }
    }
    
    // 마지막 문자 처리
    if (currentChar === 'A') {
      expression += `[A-Z]{${count}}`
    } else if (currentChar === 'N') {
      expression += `[0-9]{${count}}`
    } else if (currentChar === 'X') {
      expression += `[A-Z0-9]{${count}}`
    }
    
    expression += '$'
    return expression
  }

  const handleOpenChange = (newOpen: boolean) => {
    setOpen(newOpen)
    if (!newOpen) {
      form.reset()
    }
  }

  const handleCancel = () => {
    form.reset()
    setOpen(false)
  }

  const onSubmit = async (data: CreateCodeGroupFormValues) => {
    setIsLoading(true)
    try {
      // Expression 자동 생성
      const expressions = generateExpression(data.codeFormat || "")
      
      const result = await createCodeGroup({
        projectId: parseInt(data.projectId),
        description: data.description,
        codeFormat: data.codeFormat,
        expressions: expressions,
        controlType: data.controlType,
      })
      
      if (result.success) {
        toast.success("Code Group이 성공적으로 생성되었습니다.")
        form.reset()
        setOpen(false)
        onSuccess?.()
      } else {
        toast.error(result.error || "생성 중 오류가 발생했습니다.")
      }
    } catch (error) {
      console.error("Code Group 생성 오류:", error)
      toast.error("Code Group 생성에 실패했습니다.")
    } finally {
      setIsLoading(false)
    }
  }

  return (
    <Dialog open={open} onOpenChange={handleOpenChange}>
      <DialogTrigger asChild>
        <Button variant="outline" size="sm">
          <Plus className="mr-2 h-4 w-4" />
          Add
        </Button>
      </DialogTrigger>
      <DialogContent className="w-[400px] sm:w-[540px]">
        <DialogHeader>
          <DialogTitle>Code Group 생성</DialogTitle>
          <DialogDescription>
            새로운 Code Group을 생성합니다.
            <span className="text-red-500 mt-1 block text-sm">* 표시된 항목은 필수 입력사항입니다.</span>
          </DialogDescription>
        </DialogHeader>

        <Form {...form}>
          <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
            <FormField
              control={form.control}
              name="projectId"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>프로젝트 *</FormLabel>
                  <Select onValueChange={field.onChange} defaultValue={field.value}>
                    <FormControl>
                      <SelectTrigger>
                        <SelectValue placeholder="프로젝트를 선택하세요" />
                      </SelectTrigger>
                    </FormControl>
                    <SelectContent>
                      {projects.map((project) => (
                        <SelectItem key={project.id} value={project.id.toString()}>
                          {project.code} - {project.name}
                        </SelectItem>
                      ))}
                    </SelectContent>
                  </Select>
                  <FormMessage />
                </FormItem>
              )}
            />

            <FormField
              control={form.control}
              name="description"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Description *</FormLabel>
                  <FormControl>
                    <Input placeholder="예: PROJECT NO" {...field} />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />
            <FormField
              control={form.control}
              name="codeFormat"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Code Format</FormLabel>
                  <FormControl>
                    <Input 
                      placeholder="예: AANNN (A:영어대문자, N:숫자, X:영어/숫자)" 
                      {...field}
                      onBlur={() => form.trigger('codeFormat')}
                    />
                  </FormControl>
                  <FormDescription>
                    A: 영어 대문자, N: 숫자, X: 영어 대문자 또는 숫자
                  </FormDescription>
                  <FormMessage />
                </FormItem>
              )}
            />
            <FormField
              control={form.control}
              name="controlType"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Control Type</FormLabel>
                  <Select onValueChange={field.onChange} defaultValue={field.value}>
                    <FormControl>
                      <SelectTrigger>
                        <SelectValue placeholder="Control Type을 선택하세요" />
                      </SelectTrigger>
                    </FormControl>
                    <SelectContent>
                      <SelectItem value="textbox">Textbox</SelectItem>
                      <SelectItem value="combobox">Combobox</SelectItem>
                    </SelectContent>
                  </Select>
                  <FormMessage />
                </FormItem>
              )}
            />


          </form>
        </Form>

        <DialogFooter>
          <Button
            type="button"
            variant="outline"
            onClick={handleCancel}
            disabled={isLoading}
          >
            취소
          </Button>
          <Button
            type="submit"
            onClick={form.handleSubmit(onSubmit)}
            disabled={isLoading}
          >
            {isLoading && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
            {isLoading ? "생성 중..." : "생성"}
          </Button>
        </DialogFooter>
      </DialogContent>
    </Dialog>
  )
}