"use client"

import * as React from "react"
import { TooltipProvider } from "@/components/ui/tooltip"
import { ResizableHandle, ResizablePanel, ResizablePanelGroup } from "@/components/ui/resizable"
import { cn } from "@/lib/utils"
import { ProjectSwitcher } from "./project-swicher"
import { Sidebar } from "./sidebar"
import { useParams, usePathname, useRouter } from "next/navigation"
import { getFormsByContractItemId, type FormInfo } from "@/lib/forms/services"
import { Separator } from "@/components/ui/separator"

interface PackageData {
  itemId: number
  itemName: string
}

interface ContractData {
  contractId: number
  contractName: string
  packages: PackageData[]
}

interface ProjectData {
  projectId: number
  projectCode: string
  projectName: string
  contracts: ContractData[]
}

interface VendorDataContainerProps {
  projects: ProjectData[]
  defaultLayout?: number[]
  defaultCollapsed?: boolean
  navCollapsedSize: number
  children: React.ReactNode
}

function getTagIdFromPathname(path: string): number | null {
  // 태그 패턴 검사 (/tag/123)
  const tagMatch = path.match(/\/tag\/(\d+)/)
  if (tagMatch) return parseInt(tagMatch[1], 10)
  
  // 폼 패턴 검사 (/form/123/...)
  const formMatch = path.match(/\/form\/(\d+)/)
  if (formMatch) return parseInt(formMatch[1], 10)
  
  return null
}
export function VendorDataContainer({
  projects,
  defaultLayout = [20, 80],
  defaultCollapsed = false,
  navCollapsedSize,
  children
}: VendorDataContainerProps) {
  const pathname = usePathname()
  const router = useRouter()
  const tagIdNumber = getTagIdFromPathname(pathname)

  const [isCollapsed, setIsCollapsed] = React.useState(defaultCollapsed)
  // 폼 로드 요청 추적
  const lastRequestIdRef = React.useRef(0)

  // 기본 상태
  const [selectedProjectId, setSelectedProjectId] = React.useState(projects[0]?.projectId || 0)
  const [selectedContractId, setSelectedContractId] = React.useState(
    projects[0]?.contracts[0]?.contractId || 0
  )
  // URL에서 들어온 tagIdNumber를 우선으로 설정하기 위해 초기에 null로 두고, 뒤에서 useEffect로 세팅
  const [selectedPackageId, setSelectedPackageId] = React.useState<number | null>(null)

  const [formList, setFormList] = React.useState<FormInfo[]>([])
  const [selectedFormCode, setSelectedFormCode] = React.useState<string | null>(null)
  const [isLoadingForms, setIsLoadingForms] = React.useState(false)

  // 현재 선택된 프로젝트/계약/패키지
  const currentProject = projects.find((p) => p.projectId === selectedProjectId) ?? projects[0]
  const currentContract = currentProject?.contracts.find((c) => c.contractId === selectedContractId)
    ?? currentProject?.contracts[0]

    const isTagOrFormRoute = pathname.includes("/tag/") || pathname.includes("/form/")
    const currentPackageName = isTagOrFormRoute
      ? currentContract?.packages.find((pkg) => pkg.itemId === selectedPackageId)?.itemName || "None"
      : "None"
  
  // 폼 목록에서 고유한 폼 이름만 추출
  const formNames = React.useMemo(() => {
    return [...new Set(formList.map((form) => form.formName))]
  }, [formList])

  // (1) 새로고침 시 URL 파라미터(tagIdNumber) → selectedPackageId 세팅
  //     URL에 tagIdNumber가 있으면 그걸 우선으로, 아니면 기존 로직대로 '첫 번째 패키지' 사용
  React.useEffect(() => {
    if (!currentContract) return

    if (tagIdNumber) {
      setSelectedPackageId(tagIdNumber)
    } else {
      // tagIdNumber가 없으면, 현재 계약의 첫 번째 패키지로
      if (currentContract.packages?.length) {
        setSelectedPackageId(currentContract.packages[0].itemId)
      } else {
        setSelectedPackageId(null)
      }
    }
  }, [tagIdNumber, currentContract])

  // (2) 프로젝트 변경 시 계약 초기화
  React.useEffect(() => {
    if (currentProject?.contracts.length) {
      setSelectedContractId(currentProject.contracts[0].contractId)
    } else {
      setSelectedContractId(0)
    }
  }, [currentProject])

  // // (3) selectedPackageId 바뀔 때 URL도 같이 업데이트
  // React.useEffect(() => {
  //   if (!selectedPackageId) return
  //   const basePath = pathname.includes("/partners/")
  //     ? "/partners/vendor-data/tag/"
  //     : "/vendor-data/tag/"

  //   router.push(`${basePath}${selectedPackageId}`)
  // }, [selectedPackageId, router, pathname])

  // (4) 패키지 ID가 정해질 때마다 폼 로딩
  React.useEffect(() => {
    const packageId = getTagIdFromPathname(pathname)
    
    if (packageId) {
      setSelectedPackageId(packageId)
      
      // URL에서 패키지 ID를 얻었을 때 즉시 폼 로드
      loadFormsList(packageId);
    } else if (currentContract?.packages?.length) {
      setSelectedPackageId(currentContract.packages[0].itemId)
    }
  }, [pathname, currentContract])
  
  // 폼 로드 함수를 컴포넌트 내부에 정의하고 재사용
  const loadFormsList = async (packageId: number) => {
    if (!packageId) return;
    
    setIsLoadingForms(true);
    try {
      const result = await getFormsByContractItemId(packageId);
      setFormList(result.forms || []);
    } catch (error) {
      console.error("폼 로딩 오류:", error);
      setFormList([]);
    } finally {
      setIsLoadingForms(false);
    }
  };
  // 핸들러들
  function handleSelectContract(projId: number, cId: number) {
    setSelectedProjectId(projId)
    setSelectedContractId(cId)
  }

  function handleSelectPackage(itemId: number) {
    setSelectedPackageId(itemId)
  }

  function handleSelectForm(formName: string) {
    const form = formList.find((f) => f.formName === formName)
    if (form) {
      setSelectedFormCode(form.formCode)
    }
  }

  return (
    <TooltipProvider delayDuration={0}>
      <ResizablePanelGroup direction="horizontal" className="h-full">
        <ResizablePanel
          defaultSize={defaultLayout[0]}
          collapsedSize={navCollapsedSize}
          collapsible
          minSize={15}
          maxSize={25}
          onCollapse={() => setIsCollapsed(true)}
          onResize={() => setIsCollapsed(false)}
          className={cn(isCollapsed && "min-w-[50px] transition-all duration-300 ease-in-out")}
        >
          <div
            className={cn(
              "flex h-[52px] items-center justify-center gap-2",
              isCollapsed ? "h-[52px]" : "px-2"
            )}
          >
            <ProjectSwitcher
              isCollapsed={isCollapsed}
              projects={projects}
              selectedContractId={selectedContractId}
              onSelectContract={handleSelectContract}
            />
          </div>
          <Separator />
          <Sidebar
            isCollapsed={isCollapsed}
            packages={currentContract?.packages || []}
            selectedPackageId={selectedPackageId}
            onSelectPackage={handleSelectPackage}
            forms={formList}
            selectedForm={
              selectedFormCode
                ? formList.find((f) => f.formCode === selectedFormCode)?.formName || null
                : null
            }
            onSelectForm={handleSelectForm}
            isLoadingForms={isLoadingForms}
            className="hidden lg:block"
          />
        </ResizablePanel>

        <ResizableHandle withHandle />

        <ResizablePanel defaultSize={defaultLayout[1]} minSize={40}>
          <div className="p-4 h-full overflow-auto flex flex-col">
            <div className="flex items-center justify-between mb-4">
              <h2 className="text-lg font-bold">Package: {currentPackageName}</h2>
            </div>
            {children}
          </div>
        </ResizablePanel>
      </ResizablePanelGroup>
    </TooltipProvider>
  )
}