"use client";

import React, { useState, useEffect, use } from "react";
import { DashboardViewer } from "@/components/dashboard/DashboardViewer";
import { DashboardElement } from "@/components/admin/dashboard/types";

interface DashboardViewPageProps {
  params: Promise<{
    dashboardId: string;
  }>;
}

/**
 * 대시보드 뷰어 페이지
 * - 저장된 대시보드를 읽기 전용으로 표시
 * - 실시간 데이터 업데이트
 * - 전체화면 모드 지원
 */
export default function DashboardViewPage({ params }: DashboardViewPageProps) {
  const resolvedParams = use(params);
  const [dashboard, setDashboard] = useState<{
    id: string;
    title: string;
    description?: string;
    elements: DashboardElement[];
    settings?: {
      backgroundColor?: string;
      resolution?: string;
    };
    createdAt: string;
    updatedAt: string;
  } | null>(null);
  const [isLoading, setIsLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  const loadDashboard = React.useCallback(async () => {
    setIsLoading(true);
    setError(null);

    try {
      // 실제 API 호출 시도
      const { dashboardApi } = await import("@/lib/api/dashboard");

      try {
        const dashboardData = await dashboardApi.getDashboard(resolvedParams.dashboardId);
        setDashboard({
          ...dashboardData,
          elements: dashboardData.elements || [],
        });
      } catch (apiError) {
        console.warn("API 호출 실패, 로컬 스토리지 확인:", apiError);

        // API 실패 시 로컬 스토리지에서 찾기
        const savedDashboards = JSON.parse(localStorage.getItem("savedDashboards") || "[]");
        const savedDashboard = savedDashboards.find((d: { id: string }) => d.id === resolvedParams.dashboardId);

        if (savedDashboard) {
          setDashboard(savedDashboard);
        } else {
          // 로컬에도 없으면 샘플 데이터 사용
          const sampleDashboard = generateSampleDashboard(resolvedParams.dashboardId);
          setDashboard(sampleDashboard);
        }
      }
    } catch (err) {
      setError("대시보드를 불러오는 중 오류가 발생했습니다.");
      console.error("Dashboard loading error:", err);
    } finally {
      setIsLoading(false);
    }
  }, [resolvedParams.dashboardId]);

  // 대시보드 데이터 로딩
  useEffect(() => {
    loadDashboard();
  }, [loadDashboard]);

  // 로딩 상태
  if (isLoading) {
    return (
      <div className="flex h-screen items-center justify-center bg-background">
        <div className="text-center">
          <div className="mx-auto mb-4 h-12 w-12 animate-spin rounded-full border-4 border-ring border-t-transparent" />
          <div className="text-lg font-medium text-foreground">대시보드 로딩 중...</div>
          <div className="mt-1 text-sm text-muted-foreground">잠시만 기다려주세요</div>
        </div>
      </div>
    );
  }

  // 에러 상태
  if (error || !dashboard) {
    return (
      <div className="flex h-screen items-center justify-center bg-background">
        <div className="text-center">
          <div className="mb-4 text-6xl">😞</div>
          <div className="mb-2 text-xl font-medium text-foreground">{error || "대시보드를 찾을 수 없습니다"}</div>
          <div className="mb-4 text-sm text-muted-foreground">대시보드 ID: {resolvedParams.dashboardId}</div>
          <button onClick={loadDashboard} className="rounded-lg bg-primary px-4 py-2 text-primary-foreground hover:bg-primary/90">
            다시 시도
          </button>
        </div>
      </div>
    );
  }

  return (
    <div className="h-screen">
      {/* 대시보드 헤더 - 보기 모드에서는 숨김 */}
      {/* <div className="border-b border-border bg-white px-6 py-4">
        <div className="flex items-center justify-between">
          <div>
            <h1 className="text-2xl font-bold text-foreground">{dashboard.title}</h1>
            {dashboard.description && <p className="mt-1 text-sm text-muted-foreground">{dashboard.description}</p>}
          </div>

          <div className="flex items-center gap-3">
            {/* 새로고침 버튼 *\/}
            <button
              onClick={loadDashboard}
              className="rounded-lg border border-input px-3 py-2 text-muted-foreground hover:bg-muted hover:text-foreground"
              title="새로고침"
            >
              🔄
            </button>

            {/* 전체화면 버튼 *\/}
            <button
              onClick={() => {
                if (document.fullscreenElement) {
                  document.exitFullscreen();
                } else {
                  document.documentElement.requestFullscreen();
                }
              }}
              className="rounded-lg border border-input px-3 py-2 text-muted-foreground hover:bg-muted hover:text-foreground"
              title="전체화면"
            >
              ⛶
            </button>

            {/* 편집 버튼 *\/}
            <button
              onClick={() => {
                router.push(`/admin/screenMng/dashboardList?load=${resolvedParams.dashboardId}`);
              }}
              className="rounded-lg bg-primary px-4 py-2 text-white hover:bg-primary"
            >
              편집
            </button>
          </div>
        </div>

        {/* 메타 정보 *\/}
        <div className="mt-2 flex items-center gap-4 text-xs text-muted-foreground">
          <span>생성: {new Date(dashboard.createdAt).toLocaleString()}</span>
          <span>수정: {new Date(dashboard.updatedAt).toLocaleString()}</span>
          <span>요소: {dashboard.elements.length}개</span>
        </div>
      </div> */}

      {/* 대시보드 뷰어 */}
      <DashboardViewer
        elements={dashboard.elements}
        dashboardId={dashboard.id}
        dashboardTitle={dashboard.title}
        backgroundColor={dashboard.settings?.backgroundColor}
        resolution={dashboard.settings?.resolution}
      />
    </div>
  );
}

/**
 * 샘플 대시보드 생성 함수
 */
function generateSampleDashboard(dashboardId: string): {
  id: string;
  title: string;
  description?: string;
  elements: DashboardElement[];
  settings?: {
    backgroundColor?: string;
    resolution?: string;
  };
  createdAt: string;
  updatedAt: string;
} {
  const dashboards: Record<
    string,
    {
      id: string;
      title: string;
      description?: string;
      elements: DashboardElement[];
      settings?: {
        backgroundColor?: string;
        resolution?: string;
      };
      createdAt: string;
      updatedAt: string;
    }
  > = {
    "sales-overview": {
      id: "sales-overview",
      title: "📊 매출 현황 대시보드",
      description: "월별 매출 추이 및 상품별 판매 현황을 한눈에 확인할 수 있습니다.",
      elements: [
        {
          id: "chart-1",
          type: "chart",
          subtype: "bar",
          position: { x: 20, y: 20 },
          size: { width: 400, height: 300 },
          title: "📊 월별 매출 추이",
          content: "월별 매출 데이터",
          dataSource: {
            type: "database",
            query: "SELECT month, sales FROM monthly_sales",
            refreshInterval: 30000,
          },
          chartConfig: {
            xAxis: "month",
            yAxis: "sales",
            title: "월별 매출 추이",
            colors: ["#3B82F6", "#EF4444", "#10B981"],
          },
        },
        {
          id: "chart-2",
          type: "chart",
          subtype: "pie",
          position: { x: 450, y: 20 },
          size: { width: 350, height: 300 },
          title: "🥧 상품별 판매 비율",
          content: "상품별 판매 데이터",
          dataSource: {
            type: "database",
            query: "SELECT product_name, total_sold FROM product_sales",
            refreshInterval: 60000,
          },
          chartConfig: {
            xAxis: "product_name",
            yAxis: "total_sold",
            title: "상품별 판매 비율",
            colors: ["#8B5CF6", "#EC4899", "#06B6D4", "#84CC16"],
          },
        },
        {
          id: "chart-3",
          type: "chart",
          subtype: "line",
          position: { x: 20, y: 350 },
          size: { width: 780, height: 250 },
          title: "📈 사용자 가입 추이",
          content: "사용자 가입 데이터",
          dataSource: {
            type: "database",
            query: "SELECT week, new_users FROM user_growth",
            refreshInterval: 300000,
          },
          chartConfig: {
            xAxis: "week",
            yAxis: "new_users",
            title: "주간 신규 사용자 가입 추이",
            colors: ["#10B981"],
          },
        },
      ],
      createdAt: "2024-09-30T10:00:00Z",
      updatedAt: "2024-09-30T14:30:00Z",
    },
    "user-analytics": {
      id: "user-analytics",
      title: "👥 사용자 분석 대시보드",
      description: "사용자 행동 패턴 및 가입 추이 분석",
      elements: [
        {
          id: "chart-4",
          type: "chart",
          subtype: "line",
          position: { x: 20, y: 20 },
          size: { width: 500, height: 300 },
          title: "📈 일일 활성 사용자",
          content: "사용자 활동 데이터",
          dataSource: {
            type: "database",
            query: "SELECT date, active_users FROM daily_active_users",
            refreshInterval: 60000,
          },
          chartConfig: {
            xAxis: "date",
            yAxis: "active_users",
            title: "일일 활성 사용자 추이",
          },
        },
      ],
      createdAt: "2024-09-29T15:00:00Z",
      updatedAt: "2024-09-30T09:15:00Z",
    },
  };

  return (
    dashboards[dashboardId] || {
      id: dashboardId,
      title: `대시보드 ${dashboardId}`,
      description: "샘플 대시보드입니다.",
      elements: [],
      createdAt: new Date().toISOString(),
      updatedAt: new Date().toISOString(),
    }
  );
}
