"use client";

import React, { useState, useCallback, useEffect } from "react";
import { DashboardElement, ChartDataSource, QueryResult } from "../types";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { ChevronLeft, ChevronRight, Save, X } from "lucide-react";
import { DataSourceSelector } from "../data-sources/DataSourceSelector";
import { DatabaseConfig } from "../data-sources/DatabaseConfig";
import { ApiConfig } from "../data-sources/ApiConfig";
import { QueryEditor } from "../QueryEditor";

interface TodoWidgetConfigModalProps {
  isOpen: boolean;
  element: DashboardElement;
  onClose: () => void;
  onSave: (updates: Partial<DashboardElement>) => void;
}

/**
 * To-Do 위젯 설정 모달
 * - 2단계 설정: 데이터 소스 → 쿼리 입력/테스트
 */
export function TodoWidgetConfigModal({ isOpen, element, onClose, onSave }: TodoWidgetConfigModalProps) {
  const [currentStep, setCurrentStep] = useState<1 | 2>(1);
  const [title, setTitle] = useState(element.title || "✅ To-Do / 긴급 지시");
  const [dataSource, setDataSource] = useState<ChartDataSource>(
    element.dataSource || { type: "database", connectionType: "current", refreshInterval: 0 },
  );
  const [queryResult, setQueryResult] = useState<QueryResult | null>(null);

  // 모달 열릴 때 element에서 설정 로드
  useEffect(() => {
    if (isOpen) {
      setTitle(element.title || "✅ To-Do / 긴급 지시");
      if (element.dataSource) {
        setDataSource(element.dataSource);
      }
      setCurrentStep(1);
    }
  }, [isOpen, element.id]);

  // 데이터 소스 타입 변경
  const handleDataSourceTypeChange = useCallback((type: "database" | "api") => {
    if (type === "database") {
      setDataSource((prev) => ({
        ...prev,
        type: "database",
        connectionType: "current",
      }));
    } else {
      setDataSource((prev) => ({
        ...prev,
        type: "api",
        method: "GET",
      }));
    }
    setQueryResult(null);
  }, []);

  // 데이터 소스 업데이트
  const handleDataSourceUpdate = useCallback((updates: Partial<ChartDataSource>) => {
    setDataSource((prev) => ({ ...prev, ...updates }));
  }, []);

  // 쿼리 실행 결과 처리
  const handleQueryTest = useCallback(
    (result: QueryResult) => {
      // console.log("🎯 TodoWidget - handleQueryTest 호출됨!");
      // console.log("📊 쿼리 결과:", result);
      // console.log("📝 rows 개수:", result.rows?.length);
      // console.log("❌ error:", result.error);
      setQueryResult(result);
      // console.log("✅ setQueryResult 호출 완료!");
      
      // 강제 리렌더링 확인
      // setTimeout(() => {
      //   console.log("🔄 1초 후 queryResult 상태:", result);
      // }, 1000);
    },
    [],
  );

  // 저장
  const handleSave = useCallback(() => {
    if (!dataSource.query || !queryResult || queryResult.error) {
      alert("쿼리를 입력하고 테스트를 먼저 실행해주세요.");
      return;
    }

    if (!queryResult.rows || queryResult.rows.length === 0) {
      alert("쿼리 결과가 없습니다. 데이터가 반환되는 쿼리를 입력해주세요.");
      return;
    }

    onSave({
      title,
      dataSource,
    });

    onClose();
  }, [title, dataSource, queryResult, onSave, onClose]);

  // 다음 단계로
  const handleNext = useCallback(() => {
    if (currentStep === 1) {
      if (dataSource.type === "database") {
        if (!dataSource.connectionId && dataSource.connectionType === "external") {
          alert("외부 데이터베이스를 선택해주세요.");
          return;
        }
      } else if (dataSource.type === "api") {
        if (!dataSource.url) {
          alert("API URL을 입력해주세요.");
          return;
        }
      }
      setCurrentStep(2);
    }
  }, [currentStep, dataSource]);

  // 이전 단계로
  const handlePrev = useCallback(() => {
    if (currentStep === 2) {
      setCurrentStep(1);
    }
  }, [currentStep]);

  if (!isOpen) return null;

  return (
    <div className="fixed inset-0 z-[100] flex items-center justify-center bg-black/50">
      <div className="relative flex h-[90vh] w-[90vw] max-w-6xl flex-col rounded-lg bg-white shadow-xl">
        {/* 헤더 */}
        <div className="flex items-center justify-between border-b border-gray-200 px-6 py-4">
          <div>
            <h2 className="text-xl font-bold text-gray-800">To-Do 위젯 설정</h2>
            <p className="mt-1 text-sm text-gray-500">
              데이터 소스와 쿼리를 설정하면 자동으로 To-Do 목록이 표시됩니다
            </p>
          </div>
          <button
            onClick={onClose}
            className="rounded-lg p-2 text-gray-500 transition-colors hover:bg-gray-100 hover:text-gray-700"
          >
            <X className="h-5 w-5" />
          </button>
        </div>

        {/* 진행 상태 */}
        <div className="border-b border-gray-200 bg-gray-50 px-6 py-3">
          <div className="flex items-center gap-4">
            <div className={`flex items-center gap-2 ${currentStep === 1 ? "text-primary" : "text-gray-400"}`}>
              <div
                className={`flex h-8 w-8 items-center justify-center rounded-full font-semibold ${
                  currentStep === 1 ? "bg-primary text-white" : "bg-gray-200"
                }`}
              >
                1
              </div>
              <span className="font-medium">데이터 소스 선택</span>
            </div>
            <ChevronRight className="h-4 w-4 text-gray-400" />
            <div className={`flex items-center gap-2 ${currentStep === 2 ? "text-primary" : "text-gray-400"}`}>
              <div
                className={`flex h-8 w-8 items-center justify-center rounded-full font-semibold ${
                  currentStep === 2 ? "bg-primary text-white" : "bg-gray-200"
                }`}
              >
                2
              </div>
              <span className="font-medium">쿼리 입력 및 테스트</span>
            </div>
          </div>
        </div>

        {/* 본문 */}
        <div className="flex-1 overflow-y-auto p-6">
          {/* Step 1: 데이터 소스 선택 */}
          {currentStep === 1 && (
            <div className="space-y-6">
              <div>
                <Label className="text-base font-semibold">제목</Label>
                <Input
                  value={title}
                  onChange={(e) => setTitle(e.target.value)}
                  placeholder="예: ✅ 오늘의 할 일"
                  className="mt-2"
                />
              </div>

              <div>
                <Label className="text-base font-semibold">데이터 소스 타입</Label>
                <DataSourceSelector
                  dataSource={dataSource}
                  onTypeChange={handleDataSourceTypeChange}
                />
              </div>

              {dataSource.type === "database" && (
                <DatabaseConfig dataSource={dataSource} onUpdate={handleDataSourceUpdate} />
              )}

              {dataSource.type === "api" && <ApiConfig dataSource={dataSource} onUpdate={handleDataSourceUpdate} />}
            </div>
          )}

          {/* Step 2: 쿼리 입력 및 테스트 */}
          {currentStep === 2 && (
            <div className="space-y-6">
              <div>
                <div className="mb-4 rounded-lg bg-blue-50 p-4">
                  <h3 className="mb-2 font-semibold text-blue-900">💡 컬럼명 가이드</h3>
                  <p className="mb-2 text-sm text-blue-700">
                    쿼리 결과에 다음 컬럼명이 있으면 자동으로 To-Do 항목으로 변환됩니다:
                  </p>
                  <ul className="space-y-1 text-sm text-blue-600">
                    <li>
                      <code className="rounded bg-blue-100 px-1 py-0.5">id</code> - 고유 ID (없으면 자동 생성)
                    </li>
                    <li>
                      <code className="rounded bg-blue-100 px-1 py-0.5">title</code>,{" "}
                      <code className="rounded bg-blue-100 px-1 py-0.5">task</code>,{" "}
                      <code className="rounded bg-blue-100 px-1 py-0.5">name</code> - 제목 (필수)
                    </li>
                    <li>
                      <code className="rounded bg-blue-100 px-1 py-0.5">description</code>,{" "}
                      <code className="rounded bg-blue-100 px-1 py-0.5">desc</code>,{" "}
                      <code className="rounded bg-blue-100 px-1 py-0.5">content</code> - 상세 설명
                    </li>
                    <li>
                      <code className="rounded bg-blue-100 px-1 py-0.5">priority</code> - 우선순위 (urgent, high,
                      normal, low)
                    </li>
                    <li>
                      <code className="rounded bg-blue-100 px-1 py-0.5">status</code> - 상태 (pending, in_progress,
                      completed)
                    </li>
                    <li>
                      <code className="rounded bg-blue-100 px-1 py-0.5">assigned_to</code>,{" "}
                      <code className="rounded bg-blue-100 px-1 py-0.5">assignedTo</code>,{" "}
                      <code className="rounded bg-blue-100 px-1 py-0.5">user</code> - 담당자
                    </li>
                    <li>
                      <code className="rounded bg-blue-100 px-1 py-0.5">due_date</code>,{" "}
                      <code className="rounded bg-blue-100 px-1 py-0.5">dueDate</code>,{" "}
                      <code className="rounded bg-blue-100 px-1 py-0.5">deadline</code> - 마감일
                    </li>
                    <li>
                      <code className="rounded bg-blue-100 px-1 py-0.5">is_urgent</code>,{" "}
                      <code className="rounded bg-blue-100 px-1 py-0.5">isUrgent</code>,{" "}
                      <code className="rounded bg-blue-100 px-1 py-0.5">urgent</code> - 긴급 여부
                    </li>
                  </ul>
                </div>

                <QueryEditor
                  dataSource={dataSource}
                  onDataSourceChange={handleDataSourceUpdate}
                  onQueryTest={handleQueryTest}
                />
              </div>

              {/* 디버그: 항상 표시되는 테스트 메시지 */}
              <div className="mt-4 rounded-lg bg-yellow-50 border-2 border-yellow-500 p-4">
                <p className="text-sm font-bold text-yellow-900">
                  🔍 디버그: queryResult 상태 = {queryResult ? "있음" : "없음"}
                </p>
                {queryResult && (
                  <p className="text-xs text-yellow-700 mt-1">
                    rows: {queryResult.rows?.length}개, error: {queryResult.error || "없음"}
                  </p>
                )}
              </div>

              {queryResult && !queryResult.error && queryResult.rows && queryResult.rows.length > 0 && (
                <div className="mt-4 rounded-lg bg-green-50 border-2 border-green-500 p-4">
                  <h3 className="mb-2 font-semibold text-green-900">✅ 쿼리 테스트 성공!</h3>
                  <p className="text-sm text-green-700">
                    총 <strong>{queryResult.rows.length}개</strong>의 To-Do 항목을 찾았습니다.
                  </p>
                  <div className="mt-3 rounded bg-white p-3">
                    <p className="mb-2 text-xs font-semibold text-gray-600">첫 번째 데이터 미리보기:</p>
                    <pre className="overflow-x-auto text-xs text-gray-700">
                      {JSON.stringify(queryResult.rows[0], null, 2)}
                    </pre>
                  </div>
                </div>
              )}
            </div>
          )}
        </div>

        {/* 하단 버튼 */}
        <div className="flex items-center justify-between border-t border-gray-200 px-6 py-4">
          <div>
            {currentStep > 1 && (
              <Button onClick={handlePrev} variant="outline">
                <ChevronLeft className="mr-1 h-4 w-4" />
                이전
              </Button>
            )}
          </div>

          <div className="flex gap-2">
            <Button onClick={onClose} variant="outline">
              취소
            </Button>

            {currentStep < 2 ? (
              <Button onClick={handleNext}>
                다음
                <ChevronRight className="ml-1 h-4 w-4" />
              </Button>
            ) : (
              <Button 
                onClick={handleSave} 
                disabled={(() => {
                  const isDisabled = !queryResult || queryResult.error || !queryResult.rows || queryResult.rows.length === 0;
                  // console.log("💾 저장 버튼 disabled:", isDisabled);
                  // console.log("💾 queryResult:", queryResult);
                  return isDisabled;
                })()}
              >
                <Save className="mr-1 h-4 w-4" />
                저장
              </Button>
            )}
          </div>
        </div>
      </div>
    </div>
  );
}