"use client"

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

import {
  Sheet,
  SheetClose,
  SheetContent,
  SheetDescription,
  SheetFooter,
  SheetHeader,
  SheetTitle,
} from "@/components/ui/sheet"
import { Button } from "@/components/ui/button"
import {
  Form,
  FormControl,
  FormDescription,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from "@/components/ui/form"
import { Textarea } from "@/components/ui/textarea"
import { useRouter } from "next/navigation";

import { type GtcDocumentWithRelations } from "@/db/schema/gtc"
import { updateGtcDocumentSchema, type UpdateGtcDocumentSchema } from "@/lib/gtc-contract/validations"
import { updateGtcDocument } from "@/lib/gtc-contract/service"
import { Input } from "@/components/ui/input"

export interface UpdateGtcDocumentSheetProps
  extends React.ComponentPropsWithRef<typeof Sheet> {
  gtcDocument: GtcDocumentWithRelations | null
}

export function UpdateGtcDocumentSheet({ gtcDocument, ...props }: UpdateGtcDocumentSheetProps) {
  const [isUpdatePending, startUpdateTransition] = React.useTransition()
  const router = useRouter();

  const form = useForm<UpdateGtcDocumentSchema>({
    resolver: zodResolver(updateGtcDocumentSchema),
    defaultValues: {
      editReason: "",
      title: "",
      isActive: gtcDocument?.isActive ?? true,
    },
  })

  // gtcDocument prop 바뀔 때마다 form.reset
  React.useEffect(() => {
    if (gtcDocument) {
      form.reset({
        editReason: gtcDocument.editReason,
        title:gtcDocument.title,
        isActive: gtcDocument.isActive,
      })
    }
  }, [gtcDocument, form])

  async function onSubmit(input: UpdateGtcDocumentSchema) {
    startUpdateTransition(async () => {
      if (!gtcDocument) return

      try {
        const result = await updateGtcDocument(gtcDocument.id, input)

        if (result.error) {
          toast.error(result.error)
          return
        }

        form.reset()
        props.onOpenChange?.(false)
        router.refresh();

        toast.success("GTC 문서가 업데이트되었습니다!")
      } catch (error) {
        toast.error("문서 업데이트 중 오류가 발생했습니다.")
      }
    })
  }

  return (
    <Sheet {...props}>
      <SheetContent className="flex flex-col gap-6 sm:max-w-md">
        <SheetHeader className="text-left">
          <SheetTitle>Update GTC Document</SheetTitle>
          <SheetDescription>
            GTC 문서 정보를 수정하고 변경사항을 저장하세요
          </SheetDescription>
        </SheetHeader>

        <Form {...form}>
          <form
            onSubmit={form.handleSubmit(onSubmit)}
            className="flex flex-col gap-4"
          >
            {/* 문서 정보 표시 */}
            <div className="space-y-2 p-3 bg-muted/50 rounded-lg">
              <div className="text-sm font-medium">현재 문서 정보</div>
              <div className="text-xs text-muted-foreground space-y-1">
                <div>구분: {gtcDocument?.type === "standard" ? "표준" : "프로젝트"}</div>
                {gtcDocument?.project && (
                  <div>프로젝트: {gtcDocument.project.name} ({gtcDocument.project.code})</div>
                )}
                <div>리비전: v{gtcDocument?.revision}</div>
              </div>
            </div>


            <FormField
              control={form.control}
              name="title"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>GTC 제목 (선택사항)</FormLabel>
                  <FormControl>
                    <Input
                      placeholder="GTC 제목를 입력하세요..."
                      {...field}
                    />
                  </FormControl>
                  <FormDescription>
                    워드의 제목으로 사용됩니다.
                  </FormDescription>
                  <FormMessage />
                </FormItem>
              )}
            />


            {/* 편집 사유 */}
            <FormField
              control={form.control}
              name="editReason"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>편집 사유 (권장)</FormLabel>
                  <FormControl>
                    <Textarea
                      placeholder="편집 사유를 입력하세요..."
                      {...field}
                      rows={3}
                    />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />

            <SheetFooter className="gap-2 pt-2 sm:space-x-0">
              <SheetClose asChild>
                <Button type="button" variant="outline">
                  Cancel
                </Button>
              </SheetClose>

              <Button type="submit" disabled={isUpdatePending}>
                {isUpdatePending && (
                  <Loader
                    className="mr-2 size-4 animate-spin"
                    aria-hidden="true"
                  />
                )}
                Save
              </Button>
            </SheetFooter>
          </form>
        </Form>
      </SheetContent>
    </Sheet>
  )
}