"use client"

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

import { Button } from "@/components/ui/button"
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from "@/components/ui/form"
import { Input } from "@/components/ui/input"
import {
  Sheet,
  SheetClose,
  SheetContent,
  SheetDescription,
  SheetFooter,
  SheetHeader,
  SheetTitle,
} from "@/components/ui/sheet"
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select"

import { updateRfqSchema, type UpdateRfqSchema } from "../validations"
import { modifyRfq } from "../service"
import { RfqWithItemCount } from "@/db/schema/rfq"
import { useSession } from "next-auth/react"
import { ProjectSelector } from "@/components/ProjectSelector"
import { Project } from "../service"

interface UpdateRfqSheetProps
  extends React.ComponentPropsWithRef<typeof Sheet> {
  rfq: RfqWithItemCount | null
}

export function UpdateRfqSheet({ rfq, ...props }: UpdateRfqSheetProps) {
  const { data: session } = useSession()
  const userId = Number(session?.user?.id || 1)
  
  // RHF setup
  const form = useForm<UpdateRfqSchema>({
    resolver: zodResolver(updateRfqSchema),
    defaultValues: {
      id: rfq?.rfqId ?? 0,         // PK
      rfqCode: rfq?.rfqCode ?? "",
      description: rfq?.description ?? "",
      projectId: rfq?.projectId, // 프로젝트 ID
      dueDate: rfq?.dueDate ?? undefined,    // null을 undefined로 변환
      status: rfq?.status ?? "DRAFT",
      createdBy: rfq?.createdBy ?? userId,
    },
  });

  // 프로젝트 선택 처리
  const handleProjectSelect = (project: Project | null) => {
    if (project === null) {
      return;
    }
    form.setValue("projectId", project.id);
  };

  async function onSubmit(input: UpdateRfqSchema) {
    const { error } = await modifyRfq({
      ...input,
    })

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

    form.reset()
    props.onOpenChange?.(false)  // close the sheet
    toast.success("RFQ updated!")
  }

  return (
    <Sheet {...props}>
      <SheetContent className="flex flex-col gap-6 sm:max-w-md">
        <SheetHeader className="text-left">
          <SheetTitle>Update RFQ</SheetTitle>
          <SheetDescription>
            Update the RFQ details and save the changes
          </SheetDescription>
        </SheetHeader>

        {/* RHF Form */}
        <Form {...form}>
          <form onSubmit={form.handleSubmit(onSubmit)} className="flex flex-col gap-4">

            {/* Hidden or code-based id field */}
            <FormField
              control={form.control}
              name="id"
              render={({ field }) => (
                <input type="hidden" {...field} />
              )}
            />
            
            {/* Project Selector - 재사용 컴포넌트 사용 */}
            <FormField
              control={form.control}
              name="projectId"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Project</FormLabel>
                  <FormControl>
                    <ProjectSelector
                      selectedProjectId={field.value}
                      onProjectSelect={handleProjectSelect}
                      placeholder="프로젝트 선택..."
                    />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />

            {/* rfqCode */}
            <FormField
              control={form.control}
              name="rfqCode"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>RFQ Code</FormLabel>
                  <FormControl>
                    <Input placeholder="e.g. RFQ-2025-001" {...field} />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />

            {/* description */}
            <FormField
              control={form.control}
              name="description"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Description</FormLabel>
                  <FormControl>
                    <Input placeholder="Description" {...field} value={field.value || ""} />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />

            {/* dueDate */}
            <FormField
              control={form.control}
              name="dueDate"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Due Date</FormLabel>
                  <FormControl>
                    <Input
                      type="date"
                      // convert Date -> yyyy-mm-dd
                      value={field.value ? field.value.toISOString().slice(0, 10) : ""}
                      onChange={(e) => {
                        const val = e.target.value
                        field.onChange(val ? new Date(val + "T00:00:00") : undefined)
                      }}
                    />
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />

            {/* status (Select) */}
            <FormField
              control={form.control}
              name="status"
              render={({ field }) => (
                <FormItem>
                  <FormLabel>Status</FormLabel>
                  <FormControl>
                    <Select
                      onValueChange={field.onChange}
                      value={field.value ?? "DRAFT"}
                    >
                      <SelectTrigger className="capitalize">
                        <SelectValue placeholder="Select status" />
                      </SelectTrigger>
                      <SelectContent>
                        <SelectItem key="DRAFT" value="DRAFT" className="capitalize">
                          DRAFT
                        </SelectItem>
                        <SelectItem key="PUBLISHED" value="PUBLISHED" className="capitalize">
                          PUBLISHED
                        </SelectItem>
                        <SelectItem key="EVALUATION" value="EVALUATION" className="capitalize">
                          EVALUATION
                        </SelectItem>
                        <SelectItem key="AWARDED" value="AWARDED" className="capitalize">
                          AWARDED
                        </SelectItem>
                      </SelectContent>
                    </Select>
                  </FormControl>
                  <FormMessage />
                </FormItem>
              )}
            />

            {/* createdBy (hidden or read-only) */}
            <FormField
              control={form.control}
              name="createdBy"
              render={({ field }) => (
                <input type="hidden" {...field} />
              )}
            />

            <SheetFooter className="gap-2 pt-2 sm:space-x-0">
              <SheetClose asChild>
                <Button type="button" variant="outline">
                  Cancel
                </Button>
              </SheetClose>
              <Button>
                Save
              </Button>
            </SheetFooter>
          </form>
        </Form>
      </SheetContent>
    </Sheet>
  )
}